JP2000338272A - Electronic device and control method for electronic device - Google Patents

Abstract

(57) [Problem] To quickly forward a motor even when an AC magnetic field is generated by power generation when the motor is driven forward or reverse fast forward. A motor drive circuit for outputting a drive signal to a motor includes a corrected fast-forward control signal output circuit.
10 are provided. Further, the clock control circuit 105 outputs a detection timing signal SK indicating fast-forward to the power generator alternating-current magnetic field detection circuit 109, and during the fast-forward period, the power generation detection circuit 1
At 03, it is monitored whether or not the power generator 101 is generating power,
When the power generation detection result signal SJ is “H”, the readout signal SM is output to the corrected fast-forward control signal output circuit 110.
The output circuit 110 outputs a corrected fast-forward control signal SN in which the frequency and the effective value have been corrected.
7 and the motor drive circuit 107 outputs fast-forward drive signals Ef and Hf to the motor 108.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an electronic device having a normal forward fast-forward, a reverse fast forward, and the like in addition to a normal drive of a motor, and a method of controlling the electronic device.

[0002]

2. Description of the Related Art In recent years, analog electronic timepieces as electronic devices have additional functions such as a normal rotation fast forward function, a reverse rotation function, a reverse rotation fast forward function, a stopwatch function, an alarm function, and a timer function, in addition to a normal time display. Those that have are being commercialized. On the other hand, some electronic timepieces have a built-in power generation device such as a solar cell in order to continue operation without replacing the battery. In these electronic timepieces, the electric energy generated by the power generation device is temporarily stored in a large capacity capacitor or the like. The power storage means is provided with a function of charging, and when power is not being generated, the time is displayed using electric energy discharged from the capacitor.

As means for reversing the stepping motor used in the electronic timepiece, there is known a means for reversing the rotor by applying a plurality of alternating pulses to a coil of the motor as a set of reversing pulses. (See JP-A-52-80063). Further, there is a method of detecting whether or not the rotor has been driven to rotate in the reverse direction by detecting an induced voltage generated in the coil after the application of the reverse rotation pulse (see JP-A-55-33642).

Japanese Patent Laid-Open Publication No. Hei 5-31059 (hereinafter referred to as "first prior art") discloses a technique for reliably driving a rotor even during reverse rotation and rapid feed.
In the electronic timepiece according to the first related art, a rotation detection period is provided between a plurality of pulses constituting the reverse rotation pulse during a reverse rotation driving period of the motor (when a reverse rotation pulse is applied), and the detection pulse is output during this period. To detect the rotation state of the rotor.
Then, by changing the width of the next reverse rotation pulse according to the rotation state of the rotor, a reverse rotation drive pulse corresponding to the rotation state of the rotor is supplied to the motor. As a result, the rotor is reliably driven even in the case of reverse rotation and rapid traverse.

On the other hand, in an electronic timepiece with a built-in power generator, when the power storage means is charged during normal rotation, the power supply voltage supplied from the power storage means fluctuates. May not be driven. Therefore,
At the time of forward rotation driving, even when the driving of the rotor by the forward rotation driving pulse fails, a correction pulse having a larger force than the forward rotation driving pulse is applied to the coil to reliably drive the coil (Japanese Patent Publication No. 61-1986). No. 18151). Further, an electronic timepiece that performs reverse drive while suppressing fluctuations in power supply voltage due to charging even during reverse drive is disclosed in International Publication W.
Japanese Patent Application Laid-Open No. 097/28491 (hereinafter referred to as a second prior art). In the second prior art, a charge state control means for preventing a part or all of the electric energy output from the power generation means from being charged to the power storage means only at the time of the reverse operation is provided, and the voltage fluctuation at the time of the charge is reversed. Accurate reverse drive is performed without superimposing on the drive pulse.

[0006]

However, in the first prior art, the AC magnetic field generated when the power generation means generates power affects the motor as a leakage magnetic field, and the motor can be accurately rotated in the reverse direction. There is a problem that can not be. On the other hand, in the second prior art, since the charging state control means which operates only when the rotor is rotated in the reverse direction and fast forward is provided, the forward and fast forward driving is reliably performed in the case of the forward rotation fast forward due to the voltage fluctuation due to charging. May not be possible. Further, even if the charging of the electric energy is stopped when the power storage means is in the charged state by the charge state control means, if the AC magnetic field due to the power generation is generated in the power generation means, the AC magnetic field may leak. There is a problem that the magnetic field affects the motor, and it is not possible to accurately perform normal forward rotation of the motor. Thus, in the prior art,
There is a problem that an AC magnetic field generated when the power generation unit is in a power generation state affects the motor as a leakage magnetic field, and the motor cannot be rotated stably.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic apparatus and a control method for an electronic apparatus that can stably and rapidly feed a motor in either a forward rotation fast-forward drive or a reverse fast-forward drive. It is in.

[0008]

In order to solve the above-mentioned problems, a configuration according to a first aspect of the present invention includes a power generation unit that converts external energy into electric energy, a power storage unit that stores the generated electric energy, One or more motors driven by the electric energy stored in the power storage means, motor drive control means for controlling the drive of the motor by outputting a pulsed drive signal, and the power generation means generating an AC magnetic field by power generation An AC magnetic field generated by the power generation magnetic field is detected by the power generation magnetic field detection means when the motor is driven by the motor drive control means in the normal forward fast-forward drive or the reverse fast forward drive. And a corrected fast-forward drive signal output means for outputting a corrected fast-forward drive signal to the motor.

According to a second aspect of the present invention, in the electronic apparatus according to the first aspect, the corrected fast-forward drive signal is a frequency of a normal fast-forward drive signal in which an AC magnetic field generated by power generation is not detected by the generated magnetic field detection means. It is characterized by having a lower frequency. The invention according to claim 3 is
2. The electronic device according to claim 1, wherein the corrected fast-forward drive signal has an effective value larger than an effective value of a normal fast-forward drive signal in which an AC magnetic field generated by the power generation magnetic field detection unit is not detected. And

According to a fourth aspect of the present invention, in the electronic device according to the first aspect, the generated magnetic field detecting means determines that the AC magnetic field has been generated when the power storage means is in a charged state. It is characterized by having means.

According to a fifth aspect of the present invention, in the electronic device according to the first aspect, the generated magnetic field detection means generates the AC magnetic field by an overcharge prevention current when the power storage means is in an overcharge prevention state. And an overcharge prevention current generation determining means for performing determination as being performed.

According to a sixth aspect of the present invention, in the electronic device according to the first aspect, the power generation magnetic field detection means determines whether or not a power generation current output from the power generation means has exceeded a predetermined reference power generation current. It is characterized by comprising a generated current determining means for determining.

According to a seventh aspect of the present invention, in the electronic device according to the first aspect, the power generation magnetic field detection means calculates a storage voltage of the power storage means based on a power generation current output from the power generation means, A storage voltage determining means for determining whether or not the storage voltage has exceeded a predetermined reference storage voltage is provided.

According to an eighth aspect of the present invention, in the electronic device according to the first aspect, the power generation means has a pair of output terminals, and corresponds to a voltage of the output terminal of the power generation means and a terminal voltage of the power storage means. A comparison means for comparing a predetermined voltage with a predetermined voltage to output a comparison result signal, and a state in which a generated current can flow when the voltage of the output terminal exceeds the terminal voltage of the power storage means based on the comparison result signal. Power generation detecting means for outputting a power generation detection signal.

According to a ninth aspect of the present invention, in the electronic device according to the first aspect, the power generation magnetic field detection means performs the power generation in parallel with the charging through a path different from a charging path of the power storage means. It is characterized in that it is determined whether or not an AC magnetic field has been generated.

According to a tenth aspect of the present invention, in the electronic apparatus according to the first aspect, the motor drive control means includes a control circuit for outputting a normal drive pulse or a fast-forward drive pulse, and a motor drive pulse corresponding to the drive pulse. And a drive circuit for outputting the same.

According to an eleventh aspect of the present invention, in the electronic device according to the first aspect, the electronic device is portable.

According to a twelfth aspect of the present invention, in the electronic device according to any one of the first to eleventh aspects, the electronic device is an electronic timepiece that performs a timekeeping operation.

According to a thirteenth aspect of the present invention, in the electronic device according to the twelfth aspect, the electronic device includes time display means using hands.

According to a fourteenth aspect of the present invention, in the electronic device according to the first aspect, the electronic device has a forward / forward function,
It is characterized by having at least one of the reverse and fast forward functions.

According to a fifteenth aspect of the present invention, in the electronic device according to the first aspect, the motor is constituted by a stepping motor.

According to a sixteenth aspect of the present invention, there is provided a power generation device having a power generation coil for converting external energy into electric energy, a power storage device for storing the generated electric energy, and a drive using the electric energy stored in the power storage device. Motor, a power generation magnetic field detection device that detects whether the power generation device generates an AC magnetic field by power generation, and a motor drive control device that performs drive control of the motor by outputting a drive signal. A method for controlling an electronic device, comprising: detecting an AC magnetic field generated by the power generation magnetic field detection device while the motor drive control device drives the motor in a forward fast-forward drive or a reverse fast-forward drive; And a corrected fast-forward drive signal output step of outputting a corrected fast-forward drive signal.

According to a seventeenth aspect of the present invention, in the control method of an electronic device according to the sixteenth aspect, the step of outputting the corrected fast-forward drive signal includes a step in which an AC magnetic field generated by the power generation magnetic field detection device is in a non-detection state. A signal having a frequency lower than the frequency of the fast-forward drive signal is output.

According to an eighteenth aspect of the present invention, in the electronic device control method according to the sixteenth aspect, the step of outputting the corrected fast-forward drive signal includes a step in which an AC magnetic field generated by the power generation magnetic field detection device is in a non-detection state. It is characterized in that a signal having an effective value larger than the effective value of the fast-forward drive signal is output.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. In this embodiment, an electronic timepiece will be described as an example of electronic equipment. [1] First Embodiment First, FIG. 1 is a block diagram showing an analog electronic timepiece according to a first embodiment of the present invention.

[1.1] Overall Configuration FIG. 1 shows a schematic configuration of an electronic timepiece 1 according to the first embodiment. The electronic timepiece 1 is a wristwatch, and is used by a user by wrapping a belt connected to the apparatus main body around a wrist. Here, the electronic timepiece 1 can be roughly classified into a power generation unit A that generates AC power, rectifies an AC voltage output from the power generation unit A, stores the boosted voltage, and supplies power to each component. A power supply unit B, a control unit C that detects the power generation state of the power generation unit A, and controls the entire apparatus based on the detection result, a hand movement mechanism D that drives a pointer, and a control signal from the control unit C. And a drive section E for driving the hand movement mechanism D based on the control signal.

First, the power generation unit A generates a power generation device 40, a rotary weight 45 that turns inside the device by capturing the movement of the user's arm and the like, converts kinetic energy into rotational energy, and generates a rotation of the rotary weight 45. And a speed-up gear 46 that converts the speed (speed-up) necessary for the transmission to the power generation device 40 side and transmits it to the power generation device 40 side.

Here, in the power generation device 40, the rotation of the rotary weight 45 is transmitted to the power generation rotor 43 via the speed increasing gear 46, and the power generation rotor 43 rotates inside the power generation stator 42. It is configured as an electromagnetic induction type AC power generation device that outputs the electric power induced in the power generation coil 44 connected to the power generation stator 42 to the outside. Therefore, the power generation unit A generates power by using energy related to the life of the user, and drives the electronic timepiece 1 by using the power.

Next, the power supply section B includes a diode 47 acting as a rectifier circuit, a large-capacity capacitor 48, and a step-up / step-down circuit 49.

Here, the step-up / step-down circuit 49 performs multi-step step-up and step-down using a plurality of capacitors 49a, 49b and 49c.
1 adjusts the voltage supplied to the drive unit E. The output voltage of the step-up / step-down circuit 49 is the monitor signal Φ1
2 is also supplied to the control unit C, whereby the output voltage is monitored, and the control unit C determines whether or not the power generation unit A is generating power by a small increase or decrease in the output voltage. Here, the power supply section B takes Vdd (high potential side) as a reference potential (GND) and generates VTKN (low potential side) as a power supply voltage.

In the above description, power generation is detected by monitoring the output voltage of the step-up / step-down circuit 49 as the monitor signal Φ12. However, in a circuit configuration in which the step-up / step-down circuit 49 is not provided, the low potential side power supply voltage VTKN It is also possible to detect power generation by directly monitoring the power generation.

Next, the hand movement mechanism D will be described. The stepping motor 10 used in the hand movement mechanism D is also called a pulse motor, a stepping motor, a stepping motor, a digital motor, or the like, and is a motor driven by a pulse signal, which is frequently used as an actuator of a digital control device. In recent years, small-sized actuators for small electronic devices or information devices suitable for portable use
Many metered stepping motors are used. A typical example of such an electronic device is an electronic timepiece such as a clock switch or a chronograph.

The stepping motor 10 according to the present embodiment
Includes a drive coil 11 that generates a magnetic force by a drive pulse supplied from a drive unit E, a stator 12 that is excited by the drive coil 11, and a rotor 13 that is rotated by a magnetic field that is excited inside the stator 12. Have. Further, the stepping motor 10 includes a rotor 13
Is composed of a disk-shaped two-pole permanent magnet
It is composed of a mold (permanent magnet rotating type). The stator 12 has different magnetic poles depending on the magnetic force generated by the drive coil 11 for each phase (pole) 1 around the rotor 13.
The magnetic saturation portion 17 is provided so as to generate the magnetic flux in the regions 5 and 16. In order to regulate the rotation direction of the rotor 13, an inner notch 18 is provided at an appropriate position on the inner circumference of the stator 12.
The rotor 13 is stopped at an appropriate position by generating a cogging torque.

The rotor 1 of the stepping motor 10
The rotation of No. 3 is transmitted to each hand by a wheel train 50 including a fifth wheel & pinion 51, a fourth wheel & pinion 52, a third wheel & pinion 53, a second wheel & pinion 55, a minute wheel 55 and an hour wheel 56 meshed with the rotor 13. Is done.
The second hand 61 is connected to the center wheel of the fourth wheel & pinion 52, the minute hand 62 is connected to the second wheel & pinion 54, and the hour hand 63 is connected to the hour wheel & pinion 56. Then, the time is displayed by these hands in conjunction with the rotation of the rotor 13. It is also possible to connect a transmission system (not shown) for displaying the date and the like to the wheel train 50.

Next, the drive section E supplies various drive pulses to the stepping motor 10 under the control of the control section C. More specifically, drive pulses having different polarities and pulse widths are supplied to the drive coil 11 by applying control pulses having different polarities and pulse widths at respective timings from the control unit C.

[1.2] Functional Configuration of Control System Next, the functional configuration of the control system of the first embodiment will be described with reference to FIG. In FIG. 2, reference numerals A to E correspond to those in FIG.
Corresponds to the power generation unit A, the power supply unit B, the control unit C, the hand movement mechanism D, and the drive unit E, respectively.

Reference numeral 101 denotes a power generation device serving as power generation means. The power generation device 101 is constituted by, for example, an AC generator,
When the user puts on the arm and shakes, the rotating weight rotates to output the AC power generation voltage SA.

Reference numeral 102 denotes a rectifier circuit. The rectifier circuit 102 receives a generated voltage SA output from the power generator 101 and outputs a rectified voltage SB obtained by full-wave rectification to a secondary power supply 104 to be described later. An output voltage monitor signal SC (corresponding to a symbol Φ12 in FIG. 1) for monitoring SB is output to the power generation detection circuit 103.

Reference numeral 103 denotes a power generation detection circuit which detects power generation based on the output voltage monitor signal SC and outputs a power generation detection result signal SJ.

Reference numeral 104 denotes a high-capacity secondary power supply serving as power storage means. The secondary power supply 104 is constituted by a large-capacity capacitor, and the rectified voltage SB output from the rectifier circuit 102 has become higher than a predetermined reference voltage Vdd. Sometimes charge,
The power supply voltage SC is output to the timekeeping control circuit 105 described later.

Reference numeral 105 denotes a timekeeping control circuit. The timekeeping control circuit 105 receives a command signal from a function switching circuit 106 based on a reference pulse output from a reference pulse generation circuit (crystal oscillation circuit, frequency dividing circuit) (not shown). It outputs various signals adapted to SF. The function switching circuit 10
6 is a motor 1 operated by a user operating the crown.
08 to output a command signal SF for switching to forward rotation fast-forward, reverse rotation, reverse rotation fast-forward, and the like.

That is, in the timekeeping control circuit 105, a command signal SF for performing a normal time display is transmitted to the function switching circuit 106.
, A control signal SD for performing normal forward drive is output to the motor drive circuit 107. Further, the motor drive circuit 107 receives the control signal SD and outputs a drive signal SE to the motor 108. Then, the motor 108 receives the drive signal SE,
For example, in the case of the second hand 61, it is driven every second.

When the user operates the crown provided in the main body of the apparatus and the command signal SF for performing the fast forward rotation from the function switching circuit 106 is input to the timekeeping control circuit 105, the timekeeping control circuit 105 Forward rotation fast-forward control signal D
f is output to the motor drive circuit 107. further,
The motor drive circuit 107 receives the forward rotation fast-forward control signal Df and outputs a forward rotation fast-forward drive signal Ef to the motor 108. Then, by causing the motor 108 to perform forward rotation fast forward, the pointer causes forward rotation fast forward.

On the other hand, when the user operates the crown provided in the main body of the apparatus and a command signal SF for performing the reverse fast forward from the function switching circuit 106 is input to the timekeeping control circuit 105, the timekeeping control circuit 105 Fast-forward control signal G
f is output to the motor drive circuit 107. further,
The motor drive circuit 107 receives the reverse fast-forward control signal Gf and outputs a reverse fast-forward drive signal Hf to the motor 108. Then, the pointer is caused to perform the reverse fast forward operation by causing the motor 108 to perform the reverse fast forward operation.

As described above, the electronic timepiece 1 according to the present embodiment
By driving the motor 108 with various drive signals, the time display by the hands, the forward rotation fast forward, and further the reverse rotation fast forward are enabled.

Note that, while the command signal SF for fast-forwarding is output from the time switching control circuit 105 from the function switching circuit 106 (hereinafter, fast-forwarding period), the clock signal is directed to the power-generating device AC magnetic field detection circuit 109 described later. The detection timing signal SK which becomes "H" is output.

Reference numeral 109 denotes a power generator AC magnetic field detection circuit. The power generator AC magnetic field detection circuit 109 receives the power generation detection result signal SJ and the detection timing signal SK, detects the power generator AC magnetic field, and generates a correction command signal SL. Output. That is, the AC magnetic field detection circuit 109 receives the power generation detection result signal SJ output from the power generation detection circuit 103 and the detection timing signal SK output from the timekeeping control circuit 105, and when both become “H”. In addition, a correction command signal SL which becomes "H" is output to the timekeeping control circuit 105. During the period when the correction command signal SL is “H”, the power generation detection result signal SJ and the detection timing signal SK
Becomes "H" until the fast-forward period ends.

When the timing control circuit 109 receives the correction command signal SL, it outputs a read signal SM to the correction fast-forward control signal output circuit 110, and the correction fast-forward control signal output circuit 110 outputs the read signal SM. In response to the signal SM, the motor control circuit 107 generates a corrected fast-forward control signal SN.
Output to.

Further, reference numeral 110 denotes a corrected fast-forward control signal output circuit. The corrected fast-forward control signal output circuit 110 switches the power generation device 101 to a power generation state when the time-forward control circuit 105 outputs the fast-forward control signals Df and Gf. If it becomes
The control signal output to the motor drive circuit 107 is
It outputs a corrected fast-forward signal SN different from the normal fast-forward control signals Df and Gf.

[1.3] Description of Operation Next, the fast-forward operation of the hands will be described with reference to the timing chart shown in FIG. 3 and the flowchart shown in FIG.

[1.3.1] Explanation of signals shown in FIG. 3 First, the rectified voltage SB shown in FIG.
A full-wave rectified power generation voltage SA output from 1
7 is a waveform input to the power generation detection circuit 103. And
When it is higher than the reference voltage Vdd of the high-capacity secondary power supply 104 (between time t2 and time t3), it can be considered that the power generation device 101 is in a power generation state.

The power generation detection result signal SJ shown in FIG.
Is output from the power generation detection circuit 103, and this signal SJ pulses a signal that becomes “H” during a period in which the rectified voltage SB is higher than the reference voltage Vdd (between time t2 and t3). .

The detection timing signal SK shown in FIG.
Is output from the timekeeping control circuit 105 to the generator AC magnetic field detection circuit 109. This signal SK is a signal indicating that the timekeeping control circuit 105 outputs the forward fast-forward control signal Df. During the period from t1 to t4), a pulse that becomes “H” is output.

The fourth-stage correction command signal S shown in FIG.
L is output from the power generator AC magnetic field detection circuit 109 to the timekeeping control circuit 105.
During the period in which the corrected fast-forward control signal output circuit 110 outputs the corrected fast-forward signal SN to the motor drive circuit 7 (from time t2 to t4), a pulse that becomes “H” is output.

Further, the normal rotation fast-forward drive signal Ef shown in FIG. 3E is output from the motor drive circuit 107 to the motor 108. For example, the period T1, 3 A normal forward fast-forward drive signal consisting of a number of pulses, and the correction command signal L in the charged state
Is "H", that is, from the time t2 to the time t4.
During this period, for example, a corrected fast-forward drive signal having a period T2 (T1 <T2) and one pulse is used.

Here, the corrected fast-forward drive signal has a frequency lower than the frequency of a normal fast-forward drive signal in which the AC magnetic field generated by the power generation detection circuit 103 is not detected.
In addition, the waveform is set to a waveform having an effective value larger than the effective value of the normal fast-forward drive signal.

[1.3.2] Description of Processing Operation Next, the operation of the electronic timepiece 1 will be described with reference to the flowchart of FIG. This process is executed when the user operates the crown or the like to activate the function switching circuit 106 to cause the motor 108 to perform normal forward rotation.

First, in step S1, the power generation detection circuit 1
It is determined whether or not the power generation detection result signal SJ has been output from No. 03. If the determination is “NO” in this determination process, that is, from time t1 to time t2 in FIG. In order to perform the normal forward fast-forward operation, the normal drive fast-forward control signal Df set to the normal frequency and the effective value in step S2 is applied to the motor drive circuit 10.
7, and in step S5, a forward fast-forward drive signal Ef corresponding to the forward fast-forward control signal Df is output to the motor 1.
08, and the motor 108 causes the second hand 61 to rapidly advance, for example.

On the other hand, if "YES" is determined in the step S1, that is, since the AC magnetic field is generated from the power generator 101, in the correction period from the time t2 to the time t4 in FIG. Is set to a frequency T2 lower than the normal forward fast-forward control signal Df, and the effective value is set to an effective value larger than the normal normal fast-forward control signal Df in step S4.

In step S5, the motor drive circuit 107 receives the corrected fast-forward control signal SN whose frequency and effective value have been corrected, and outputs the corrected forward fast-forward drive signal Ef to the motor 108.

As described above, when an AC magnetic field is generated from the power generator 101 during the forward rotation of the motor 108, the frequency of the fast-forward drive signal Ef output from the motor drive circuit 107 to the motor 108 is changed. By lowering and increasing the effective value, without being affected by the AC magnetic field,
The forward rotation of the motor 108 can be reliably performed.

Here, the problems of the prior art are re-listed.
Immediately after the rotor of the motor 108 is rotated by 180 degrees, it usually takes 10 mS until the rotor is almost stopped while attenuating due to free vibration. However, in the normal rotation operation, when the driving frequency is 128 Hz,
The interval between the pulses of the drive signal is as short as several milliseconds, which means that the next pulse is input before the rotor is completely attenuated. Under these driving conditions, the AC magnetic field generated by the power generation of the power generation device 101 causes the driving coil 11
And the operation of the motor 108 was unstable.
Therefore, in the present embodiment, by lowering the frequency of the normal rotation fast-forward drive signal Ef, the next pulse is not input until the free oscillation of the rotor is almost completed, so that the rotor can be fast-forwarded reliably.

[1.4] Effects of the First Embodiment As described above in detail, according to the first embodiment, the motor 1
When the power generation device 101 is in a power generating state and generates an AC magnetic field associated with the power generation during the normal forward fast-forwarding operation, a forward fast-forward drive signal Ef output from the motor drive circuit 107 to the motor 108 is generated. Is lower than the normal frequency and higher than the normal effective value. As a result, the operable voltage range of the motor 108 is widened, and even when the power generation device 101 is in the power generation state, the motor 1
08 can be reliably operated step by step.
Then, even when the power generation device 101 is in a power generation state and is generating an AC magnetic field, the motor 108 can be forward-forwarded fast.

Further, even when noise due to the AC magnetic field generated when the power generator 101 is in the power generation state is superimposed on the forward fast-forward signal Ef, the motor 108 can be accurately forwarded by the corrected forward fast-forward signal Ef. Fast forward can be performed. Furthermore, unlike the second related art, fast-forwarding can be performed without stopping charging, while continuing charging, so that the power generation voltage SA is not wasted.

[2] Second Embodiment Next, a second embodiment according to the present invention will be described with reference to FIG. In the second embodiment, the motor 108 is driven to reversely rotate and feed forward. The components used in the present embodiment are the same as the components of the first embodiment described above, and thus the description thereof will be omitted. Further, in the present embodiment, the reverse fast-forward drive signal Hf and the corrected reverse fast-forward drive signal will be illustrated and described.

[2.1] Description of Reverse-Fast-Forward Signal FIG. 5A shows a normal reverse-fast-forward drive signal Hf, and one pulse waveform for driving the motor 108 by one step is a forward drive pulse. A first pulse α having a width shorter than a required pulse width, a second pulse β having a different polarity following the first pulse α, and a third pulse γ having a different polarity following the second pulse β. The third pulse γ is composed of, for example, four pulses having a short pulse width. By supplying the reverse fast-forward drive signal Hf to the motor 108, fast reverse feed can be performed. The signal (1) shown in FIG. 5B is a case where the frequency and the effective value of the normal reverse fast-forward drive signal are corrected during the correction period, and the frequency is lowered by changing the cycle from T3 to T4. The effective value is increased by using the pulse γ as one pulse. The signal (2) shown in FIG. 5C is obtained by increasing the effective value of the third pulse γ of the normal reverse fast-forward drive signal during the correction period. A signal (3) shown in FIG. 5D is obtained by correcting the period of the normal reverse fast-forward drive signal from T3 to t4 during the correction period.

[2.2] Effects of the Second Embodiment As described in the first embodiment, when the power generating apparatus 101 generates power and generates an AC magnetic field during the fast-forward period, the corrected reverse fast-forward drive signal Any one of (1) to (3)
By making corrections using the motors, the motor 108 can be surely rotated in the reverse direction.

[3] Third Embodiment [3.1] Circuit Configuration Next, a specific circuit configuration of the power generation detection circuit will be described with reference to FIG. 6. FIG. A power generating device 101 for generating a generated voltage, and a power generating device 10
A rectifier circuit 102 that rectifies the generated voltage output from the rectifier circuit 1 and converts it into a DC current; a high-capacity secondary power supply 104 (hereinafter, referred to as a large-capacity capacitor 104) that stores the DC current output from the rectifier circuit 102; Is illustrated.

Reference numeral 201 denotes a power generation detection circuit according to the present embodiment.
A smoothing circuit 203 that smoothes the output of the NAND circuit 202 that outputs the result by taking the negation of the logical sum of COMP1 and the output of the second comparator COMP2 using an RC integration circuit and outputs the result as a power generation detection result signal SJ. It is configured.

Here, the rectifier circuit 102 is
1 for comparing the voltage of one output terminal AG1 with the reference voltage Vdd to perform on / off control of the first transistor Q1 to perform active rectification.
A second comparator for performing active rectification by alternately turning on / off the second transistor Q2 and the first transistor Q1 by comparing the voltage of the other output terminal AG2 of the power generator 101 with the reference voltage Vdd. COMP
2 and the terminal voltage V2 of the output terminal AG2 of the power generator 101.
The third transistor Q3, which is turned on when the voltage exceeds a preset threshold voltage, and the fourth transistor Q4, which is turned on when the terminal voltage V1 of the terminal AG1 of the power generator 101 exceeds the preset threshold voltage, It is provided with.

[3.2] Charging Operation First, the charging operation will be described.

When the power generator 101 starts power generation, the generated voltage is supplied to both output terminals AG1 and AG2. In this case, the terminal voltage V1 of the output terminal AG1 and the output terminal AG2
The phase of the terminal voltage V2 is determined.

Here, when the terminal voltage V1 of the output terminal AG1 exceeds the threshold voltage, the fourth transistor Q4 turns on. Thereafter, the terminal voltage V1 increases and the reference voltage Vdd
Is exceeded, the output of the first comparator COMP1 becomes "L" level, and the first transistor Q1 is turned on.

On the other hand, since the terminal voltage V2 of the output terminal AG2 is lower than the threshold voltage, the third transistor Q3 is off, the terminal voltage V is lower than the reference voltage Vdd, and the output of the second comparator COMP2 is Is at "H" level, and the second transistor Q2 is turned off.

Therefore, during the period when the first transistor Q1 is in the ON state, the path of “the output terminal AG1 → the first transistor Q1 → the reference voltage Vdd → the large capacity capacitor 104 → the low potential side power supply voltage VTKN → the third transistor Q3” As a result, the generated current flows, and the large-capacity capacitor 104 is charged.

[3.3] Power Generation State Detection Operation As described above, when the generated current flows, either the output of the first comparator COMP1 or the output of the second comparator COMP2 is at the “L” level.

Therefore, the NAND circuit 202 of the power generation detection circuit 201 negates the logical sum of the outputs of the first comparator COMP1 and the second comparator COMP2, so that the "H" level signal is output while the generated current is flowing. Is output to the smoothing circuit 203.

In this case, since the output of the NAND circuit 202 contains switching noise, the smoothing circuit 20
Reference numeral 3 denotes a circuit for smoothing the output of the NAND circuit 202 using an RC integration circuit and outputting a power generation detection result signal SJ.

[3.4] Effects of Third Embodiment As shown in FIG. 6, by configuring the power generation detection circuit 201, the power generation state of the power generation device 101 can be detected, and the power generation detection result signal SJ can be obtained. .

[4] Fourth Embodiment In the present embodiment, the power generation detection circuit performs the power generation detection based on the power generation voltage in the above-described embodiment. It is an embodiment about.

[4.1] Configuration of Power Generation Detection Circuit First, the configuration of the power generation detection circuit will be described with reference to FIG. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 301 denotes a power generation detection circuit according to the present embodiment. The power generation detection circuit 301 includes a current / voltage conversion unit 302 for performing voltage / current conversion of a power generation voltage of the power generation unit A, and a power generation voltage SA having a predetermined amplitude. The first detection circuit 303 generates a voltage detection signal Sv which becomes “H” level when the voltage exceeds the voltage, and becomes “L” when the voltage falls below the voltage, and becomes “H” level when the power generation continuation time exceeds a predetermined time. A second detection circuit 304 that generates a power generation continuation time detection signal St that becomes an “L” level when the power generation continuity detection signal falls below the threshold, and outputs a logical sum of the voltage detection signal Sv and the power generation continuation time detection signal St as a power generation detection result signal SJ And an OR circuit 305 that performs the operation.

Here, the current-voltage conversion section 302 generates a current-detecting resistor R connected in series between the diode 47 and the power generating section A, and a voltage generated at both ends of the current detecting resistor R in order to detect the potential at both ends of the current detecting resistor R. And an MOS transistor TRSW for effectively disconnecting the current detection resistor R when the current is not detected by the detection timing SW in order to reduce the charging loss.

Reference numeral 310 denotes a limiter transistor. When the storage voltage of the large capacity capacitor 48 exceeds a predetermined allowable voltage, the limiter transistor 310
The power generation unit A is short-circuited based on the overcharge prevention control signal SLIM to prevent overcharge.

In this case, the detection timing signal SW
Is the same signal as the detection timing signal SK or a signal synchronized with the detection timing signal SK. The signal is output from the timing control circuit 105 in FIG.
When power generation is detected, the MOS transistor TRSW is turned on at the same timing as the detection timing. Further, the overcharge prevention control signal SLIM is output from the timekeeping control circuit 105 in FIG.
The stored voltage of the storage capacitor 04 (large-capacity capacitor 48) is detected, and when the detected stored voltage exceeds a preset allowable voltage, the limiter transistor 310 is output to be turned on.

[4.2] Operation of Power Generation Detection Circuit Next, the operation of the power generation detection circuit 301 and the operation of the limiter transistor 310 will be described with reference to FIG.

[4.2.1] In the case where the stored voltage of the large-capacity capacitor 48 is lower than the predetermined allowable voltage and current detection is performed. In this case, the overcharge prevention control signal SLIM is at the “H” level. , The limiter transistor 310 is off, the detection timing signal SW is at the “L” level, and the MOS transistor TRSW is off.

As a result, when power is generated in the power generation section A, a generated current flows through the current detection resistor R via the large-capacity capacitor 48 and the diode 47. This allows
A voltage difference corresponding to the amount of the generated current is generated at both ends of the current detection resistor R, and the operational amplifier OP outputs the generated voltage SA corresponding to the voltage difference to the first detection circuit 303 and the second detection circuit 3.
04.

Here, the first detection circuit 303 goes to the “H” level when the amplitude of the generated voltage SA exceeds a predetermined voltage,
A voltage detection signal Sv which becomes “L” level when the voltage falls below this level is generated and output to the OR circuit 305.

The second detection circuit 304 generates a power generation continuation time detection signal St which becomes “H” level when the power generation continuation time exceeds a predetermined time, and becomes “L” level when the power generation continuation time falls below the predetermined time. Output to

As a result, the OR circuit 305 outputs the power generation detection result signal SJ by calculating the logical sum of the voltage detection signal Sv and the power generation continuation time detection signal St.

That is, as described above, the power generation detection circuit 301 satisfies one of the conditions set in the first detection circuit 303 or the second detection circuit 304 based on the generated current, ie, the power generation state, that is, A power generation detection result signal SJ corresponding to a state where an AC magnetic field may be generated due to power generation is output.

[4.2.2] In the case where the stored voltage of the large-capacity capacitor 48 is equal to or higher than a predetermined allowable voltage and current detection is performed. In this case, the overcharge prevention control signal SLIM is at the “L” level. , The limiter transistor 310 is on, the detection timing signal SW is at the “L” level, and the MOS transistor TRSW is off.

As a result, when power is generated in the power generation section A, a generated current flows through the current detection resistor R via the limiter transistor 310.

As a result, a voltage difference corresponding to the amount of the generated current is generated across the current detecting resistor R, and the operational amplifier OP
Converts the generated voltage SA according to the voltage difference into a first detection circuit 3
03 and the second detection circuit 304.

Here, when the amplitude of the generated voltage SA exceeds a predetermined voltage, the first detection circuit 303 goes to the “H” level,
A voltage detection signal Sv which becomes “L” level when the voltage falls below this level is generated and output to the OR circuit 305.

The second detection circuit 304 generates a power generation continuation time detection signal St which becomes “H” level when the power generation continuation time exceeds a predetermined time, and becomes “L” level when the power generation continuation time falls below the predetermined time. Output to

As a result, the OR circuit 305 outputs the power generation detection result signal SJ by calculating the logical sum of the voltage detection signal Sv and the power generation continuation time detection signal St.

That is, as described above, the power generation detection circuit 301 satisfies one of the conditions set in the first detection circuit 303 or the second detection circuit 304 based on the current accompanying the power generation, and That is, a power generation detection result signal SJ corresponding to a state in which an AC magnetic field may be generated due to power generation is output. Configuration of power generation detection circuit

[4.2.3] When Current Detection is Not Performed In this case, the detection timing signal SW is at the “H” level, and the MOS transistor TRSW is on.

As a result, the current detection resistor R is short-circuited, and the current detection resistor R is effectively disconnected from the charging path. As a result, no potential difference occurs between both ends of the current detection resistor R, and no current detection is performed.

[4.3] Effects of Fourth Embodiment As described above, according to the fourth embodiment, the power receiving state of the large-capacity capacitor 48 or the power generating state of the power generating unit A can be detected based on the generated current. , Without being affected by the AC magnetic field generated by the current generated by the power generation unit A,
Motor drive control can be performed.

[5] Fifth Embodiment In the fourth embodiment, the overcharge prevention circuit and the rectifier circuit are configured as separate components. However, in the fifth embodiment, a rectifier in which these are integrated circuit configurations. / Embodiment provided with an overcharge prevention circuit. In the present embodiment, the power generation detection circuit has substantially the same configuration as the power generation detection circuit 201 of the third embodiment.

[5.1] Configuration around Rectifier / Overcharge Prevention Circuit FIG. 8 shows a circuit configuration around the rectification / overcharge prevention circuit and the power generation detection circuit. 401 is a rectification / overcharge prevention circuit,
The rectification / overcharge prevention circuit 401 rectifies an AC current output from the power generation device 101, converts the AC current into a DC current, and prevents overcharge.

Here, the rectification / overcharge prevention circuit 401
A first comparator A1 COMP1 for performing on / off control of the first transistor Q1 to perform functional rectification by comparing the voltage of one output terminal AG1 of the power generator 101 with the reference voltage Vdd; The second transistor Q2 is turned on / off alternately with the first transistor Q1 by comparing the voltage of the other output terminal AG2 with the reference voltage Vdd to perform the function rectification.
Comparator A COMP2 and output terminal A of power generator 101
By comparing the voltage of G1 with the power supply voltage VTKN,
Comparing the voltage of the output terminal AG2 of the power generator 101 with the third comparator A3 for performing functional rectification by turning on / off the transistor Q3 at the same timing as the second transistor Q2, and the power supply voltage VTKN. As a result, the fourth comparator A4 for turning on / off the fourth transistor Q4 at the same timing as the first transistor Q1 to perform functional rectification, and the output of the first comparator COMP1 are input to one input terminal. ,
A first AND circuit AND1 in which an inverted signal of the overcharge prevention control signal SLIM is input to the other input terminal, and an output of the second comparator COMP2 is input to one input terminal, and the overcharge prevention control signal SLIM is input to the other input terminal. , And a second AND circuit AND2 to which the inverted signal is input.

Further, similarly to the third embodiment, the power generation detection circuit 201 performs a logical negation of the output of the first comparator COMP1 and the output of the second comparator COMP2 and outputs N.
An AND circuit 202 and an output of the NAND circuit 202 are R
The power generation detection result signal SJ is smoothed using a C-integrator circuit.
, And a smoothing circuit 203 that outputs the result.

In this case, the overcharge prevention control signal SLIM is
The storage voltage output from the timekeeping control circuit 105 in FIG. 2 and detected by the high-capacity secondary power supply 104 (large-capacity capacitor 48) is detected. If the detected storage voltage exceeds a preset allowable voltage, the first AND circuit AND1 And the second AND
The circuit AND2 supplies an "H" level overcharge prevention control signal SLI.
M is output.

[5.2] Operation of Fifth Embodiment [5.2.1] Normal Operation First, the normal operation in which the overcharge prevention control signal SLIM is at the “L” level will be described. When the power generation device 101 starts power generation, the power generation voltage SA is supplied to both output terminals AG1 and AG2. In this case, the phases of the terminal voltage V1 of the output terminal AG1 and the terminal voltage V2 of the output terminal AG2 are determined.

When the terminal voltage V2 falls and becomes lower than the power supply voltage VTKN, the output of the fourth comparator COMP4 becomes "H" level, and the fourth transistor Q4 turns on.

In parallel with this, the terminal voltage V1 rises,
When the voltage of the reference power supply Vdd is exceeded, the first comparator COMP
The output of 1 becomes "L" level.

At this time, since the overcharge prevention control signal SLIM is at "L" level, both input terminals of the first AND circuit AND1 are at "L" level. First transistor Q1
Is turned on.

On the other hand, since the terminal voltage V1 has risen,
When the voltage becomes equal to or higher than the power supply voltage VTKN, the output of the third comparator COMP3 becomes "L" level, and the third transistor Q3 is turned off.

At the same time, since the terminal voltage V2 is falling, it becomes lower than the reference voltage Vdd, and the output of the second comparator COMP2 becomes "H" level. At this time, since the overcharge prevention control signal SLIM is at "L" level, one of the input terminals of the second AND circuit AND2 is at "L" level.
Level, and the other becomes “H” level, and the second transistor Q2 is turned off.

Therefore, during the period when the first transistor Q1 and the fourth transistor Q4 are on,
The generated current flows through the path of “terminal AG1 → first transistor Q1 → power supply Vdd → large capacity capacitor 48 → power supply voltage VTKN → fourth transistor Q4”, and the large capacity capacitor 48
Is charged.

Similarly, when the terminal voltage V1 falls and becomes lower than the power supply voltage VTKN, the output of the third comparator COMP3 becomes "H" level, and the third transistor Q3 is turned on.

In parallel with this, the terminal voltage V2 rises,
When the power supply voltage VTKN is exceeded, the second comparator COM
The output of P2 becomes "L" level. At this time, since the overcharge prevention control signal SLIM is at “L” level, the second AND
Both input terminals of the circuit AND2 become “L” level. Second
The transistor Q2 is turned on.

On the other hand, since the terminal voltage V2 has risen,
When the voltage becomes equal to or higher than the power supply voltage VTKN, the output of the fourth comparator COMP4 becomes "L" level, and the fourth transistor Q4 is turned off.

At the same time, since the terminal voltage V1 is falling, it becomes lower than the voltage of the power supply voltage VTKN, and the output of the first comparator COMP1 becomes "H" level. At this time, since the overcharge prevention control signal SLIM is at "L" level, one of the input terminals of the first AND circuit AND1 is at "L" level.
Level, and the other becomes “H” level, and the first transistor Q1 is turned off.

Therefore, during the period when the second transistor Q2 and the third transistor Q3 are on,
"Terminal AG2 → second transistor Q2 → reference power supply Vdd →
The generated current flows through the path of the large capacity capacitor 48 → the power supply voltage VTKN → the third transistor Q3, and the large capacity capacitor 48 is charged.

As described above, also in the fifth embodiment,
As in the third embodiment, when the generated current flows, the first
The output of either the comparator COMP1 or the second comparator COMP2 is at "L" level.

Therefore, the NAND circuit 202 of the power generation detection circuit 201 calculates the logical product of the outputs of the first comparator COMP1 and the second comparator COMP2, and
While the generated current is flowing, an “H” level signal is output to the smoothing circuit 203. In this case, the NAND
Since the output of the circuit 202 includes switching noise, the smoothing circuit 203 smoothes the output of the NAND circuit 202 using an RC integration circuit and outputs a power generation detection result signal SJ.

[5.2.2] At the time of overcharge prevention operation Next, the operation at the time of overcharge prevention operation in which the overcharge prevention control signal SLIM is at the "H" level will be described. In this case, one of the input terminals of the first AND circuit AND1 and the second AND circuit AND2 is always at the “H” level, and the first AND circuit AND1 and the second AND circuit AN
The output of D2 is always at "L" level.

As a result, the transistors Q1 and Q2 are always on, and the power generator 101
, Both output terminals AG1 and AG2 are pulled up, and the large-capacity capacitor 48 is not charged. At this time, a voltage difference corresponding to the amount of the generated current occurs between the drain and the source of the transistor Q1 and the transistor Q2, and one of the outputs of the first comparator COMP1 and the second comparator COMP2 becomes “L”.

Therefore, the NAND circuit 202 of the power generation detection circuit 201 performs a negation of the logical product of the outputs of the first comparator COMP1 and the second comparator COMP2,
The “H” level signal is output to the smoothing circuit 203 while the generated current is flowing. Also in this case, since the output of the NAND circuit 202 includes switching noise, the smoothing circuit 203 smoothes the output of the NAND circuit 202 using the RC integration circuit and outputs the result as the power generation detection result signal SJ. Things. That is, the power generation detection circuit 201 outputs a power generation detection result signal SJ corresponding to a power generation state, that is, a state in which an AC magnetic field may be generated due to the power generation, based on the current accompanying the power generation.

[5.3] Effect of Fifth Embodiment With the configuration described above, the state of charge of the large-capacity capacitor 48 or the state of power generation of the power generation device 101 can be detected based on the generated current. The motor control drive can be performed without being affected by the magnetic field accompanying the power generation.

[6] Modified Example of Embodiment [6.1] First Modified Example In each of the above embodiments, the case where the frequency correction and the effective value correction are performed simultaneously has been described. However, the motor 10 is not limited to the case where the frequency correction (step S3) and the effective value correction (step S4) are performed separately.
8 can be reliably performed.

[6.2] Second Modification In the first embodiment, the period for correcting the forward rotation fast-forward signal Ef is set from the time t2 to the time t4 as shown in FIG. A period until t3, that is, a period in the power generation state in which the rectified voltage SB is higher than the reference voltage Vdd may be set as the correction period.

[6.3] Third Modification In each of the above embodiments, the timekeeping control circuit 6 determines whether or not the high-capacity secondary power supply 4 is in the charged state during the normal rotation fast-forward period, and determines whether or not the high-capacity secondary power supply 4 is in the charged state. In some cases, the read signal M is output to the corrected fast-forward control signal output circuit 8, and the output circuit 8 outputs the corrected fast-forward control signal N to the motor drive circuit 7. The present invention is not limited to this. When the power generation device AC magnetic field detection circuit 12 is directly connected to the correction fast-forward control signal output circuit 8, and the correction command signal L output from the power generation device AC magnetic field detection circuit 12 is "H", In addition, a corrected fast-forward drive signal whose frequency or effective value has been corrected is
8 may be directly output.

[6.4] Fourth Modification As the power generating means of the present invention, any type of power generating means that generates a magnetic field by power generation can be applied.

[6.5] Fifth Modification In each of the above embodiments, a wristwatch-type electronic timepiece has been described as an example. However, any type of timepiece that generates a magnetic field at the time of power generation and has a motor can be used. The present invention can be applied to a timepiece.

[6.6] Sixth Modification In the above embodiments, the case where the second hand is driven by the motor 108 has been described as an example. However, the present invention is not limited to this, and the minute hand driven by the motor is not limited to this. The present invention may be applied to the hour hand or to a plurality of motors. [6.7] Seventh Modified Example In each of the above embodiments, a wristwatch-type electronic timepiece has been described as an example. However, the present invention is applicable to any electronic device that generates a magnetic field during power generation and includes a motor. It is possible.
For example, music players, music recorders, image players and image recorders (for CDs, MDs, DVDs, magnetic tapes, etc.) or their portable devices and computer peripherals (floppy disk drives, hard disk drives, MO drives, It may be an electronic device such as a DVD drive or a printer) or a portable device thereof.

[0132]

According to the present invention, when an AC magnetic field is generated due to power generation during fast-forward driving of a motor, the frequency of the fast-forward driving signal is reduced or the effective value is increased. The motor can be reliably driven irrespective of the influence of the voltage fluctuation of the power storage means.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an electronic timepiece according to a first embodiment.

FIG. 2 is a block diagram illustrating a functional configuration of the electronic timepiece according to the first embodiment.

FIG. 3 is a time chart illustrating correction of a normal rotation fast-forward drive signal according to the first embodiment.

FIG. 4 is a flowchart showing a process of correcting a fast-forward drive signal according to the first embodiment.

FIG. 5 is a waveform diagram showing a reverse fast-forward drive signal according to a second embodiment.

FIG. 6 is a circuit configuration diagram showing a circuit configuration around a power generation detection circuit according to a third embodiment.

FIG. 7 is a circuit configuration diagram showing a circuit configuration around a power generation detection circuit according to a fourth embodiment.

FIG. 8 is a circuit configuration diagram showing a circuit configuration around a power generation detection circuit according to a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electronic timepiece 48 ... Large capacity capacitor 101 ... Power generation device 102 ... Rectification circuit 103, 201, 301 ... Power generation detection circuit 104 ... High capacity secondary power supply 105 ... Timekeeping control circuit 106 ... Function switching circuit 107 ... Motor drive circuit 108 ... Motor 109: power generator AC magnetic field detection circuit 110: correction fast-forward control signal output circuit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinji Nakamiya 3-3-5 Yamato, Suwa-shi, Nagano F-term in Seiko Epson Corporation (reference) 2F001 AB01 AD00 AF00 AH04 2F083 AA01 BB08 CC02 EE02 2F084 AA06 BB02 CC03 JJ04 JJ08

Claims (18)

[Claims] A power generating means for converting external energy into electric energy; a power storing means for storing the generated electric energy; one or more motors driven by the electric energy stored in the power storing means; Motor drive control means for performing drive control of the motor by outputting a pulsed drive signal; power generation magnetic field detection means for detecting whether or not the power generation means has generated an AC magnetic field by power generation; and Means for outputting a corrected fast-forward drive signal to the motor when an alternating-current magnetic field generated by power generation is detected by the generated magnetic field detecting means while the motor is being driven forward or fast in reverse or fast-forward. An electronic device comprising: means. 2. The electronic device according to claim 1, wherein the corrected fast-forward drive signal has a frequency lower than a frequency of a normal fast-forward drive signal in which an AC magnetic field generated by the power generation magnetic field detection unit is in a non-detection state. Electronic equipment characterized by the above. 3. The electronic device according to claim 1, wherein the corrected fast-forward drive signal has an effective value larger than an effective value of a normal fast-forward drive signal in which an AC magnetic field generated by the power generation magnetic field detection unit is not detected. An electronic device comprising: 4. The electronic device according to claim 1, wherein said generated magnetic field detecting means includes a charged state determining means for determining that said AC magnetic field has been generated when said power storage means is in a charged state. Electronic equipment characterized. 5. The electronic device according to claim 1, wherein the generated magnetic field detection means determines that the AC magnetic field has been generated by an overcharge prevention current when the power storage means is in an overcharge prevention state. An electronic device comprising an overcharge prevention current generation determining means. 6. The electronic device according to claim 1, wherein the generated magnetic field detection unit determines whether a generated current output from the power generation unit exceeds a predetermined reference generated current. An electronic device comprising: 7. The electronic device according to claim 1, wherein the generated magnetic field detection means calculates a storage voltage of the power storage means based on a generated current output from the power generation means,
An electronic device comprising: a storage voltage determining unit configured to determine whether the storage voltage has exceeded a predetermined reference storage voltage. 8. The electronic device according to claim 1, wherein the power generation unit has a pair of output terminals, and controls a voltage of an output terminal of the power generation unit and a predetermined voltage corresponding to a terminal voltage of the power storage unit. Comparing means for comparing and outputting a comparison result signal; and outputting a power generation detection signal corresponding to a state where a generated current can flow when the voltage of the output terminal exceeds the terminal voltage of the power storage means based on the comparison result signal. An electronic device, comprising: 9. The electronic device according to claim 1, wherein the power generation magnetic field detection unit generates an AC magnetic field by the power generation in parallel with the charging via a path different from a charging path of the power storage unit. An electronic device characterized by determining whether or not the electronic device is the electronic device. 10. The electronic device according to claim 1, wherein the motor drive control unit includes: a control circuit that outputs a normal drive pulse or a fast-forward drive pulse; and a drive circuit that outputs a motor drive pulse corresponding to the drive pulse. An electronic device comprising: 11. The electronic device according to claim 1, wherein the electronic device is portable. 12. The electronic device according to claim 1, wherein the electronic device is an electronic timepiece that performs a clocking operation. 13. The electronic device according to claim 12, wherein the electronic device includes a time display unit using a pointer. 14. The electronic device according to claim 1, wherein the electronic device has at least one of a forward fast-forward function and a reverse fast-forward function. 15. The electronic device according to claim 1, wherein the motor is a stepping motor. 16. A power generation device having a power generation coil for converting external energy into electric energy, a power storage device for storing the generated electric energy, a motor driven by the electric energy stored in the power storage device, A control method for an electronic device comprising: a power generation magnetic field detection device that detects whether a power generation device generates an AC magnetic field by power generation; and a motor drive control device that performs drive control of the motor by outputting a drive signal. And outputting a corrected fast-forward drive signal to the motor when an alternating-current magnetic field is generated by power generation by the power-generating magnetic field detection device while the motor drive control device drives the motor in a forward or a reverse fast-forward drive. A method for controlling an electronic device, comprising a step of outputting a corrected fast-forward drive signal. 17. The method for controlling an electronic device according to claim 16, wherein the step of outputting a corrected fast-forward drive signal is performed based on a frequency of a normal fast-forward drive signal in which an AC magnetic field generated by the power generation magnetic field detection device is not detected. A method for controlling an electronic device, comprising: outputting a signal having a low frequency. 18. The method for controlling an electronic device according to claim 16, wherein the step of outputting the corrected fast-forward drive signal comprises the step of outputting an effective value of a normal fast-forward drive signal in which an AC magnetic field generated by the generated magnetic field detection device is not detected. A method for controlling an electronic device, comprising: outputting a signal having a larger effective value than the above.