JP2011120466A - Power regeneration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide electric power capable of taking out inductive power existing in an environment and operating a general IC.
Between a diode 3 and a capacitor 5, a switch 91 made of, for example, a CMOSFET and a controller 92 made of a microcontroller having a small current consumption value are provided. The controller 92 detects the voltage discharged from the capacitor 5 and controls the switch 91 to limit the charge current supplied to the capacitor 5. Since the impedance of the power supply due to the electric field detected by the antenna 1 is very high, no inductance is required between the diode 3 and the capacitor 5. Further, the level of the triangular wave ripple generated in the capacitor 5 can be controlled by the controller 92, and the control for the load fluctuation can be performed in the same manner as a normal switching regulator.
[Selection] FIG.

Description

  The present invention relates to a power regeneration device, and more particularly to a power regeneration device capable of improving power regeneration efficiency and supplying a stable voltage output when taking inductive power present in the environment and generating power.

  FIG. 1 is a circuit diagram of a power regeneration circuit that regenerates an electromotive force generated by induction using a diode and a capacitor.

  In the power regeneration circuit of FIG. 1, an induced electromotive force existing in the air is detected by the antenna 1 and the ground (GND) 2, and a DC charge is stored in the capacitor 5 from the diode 3 and the diode 4. That is, when the potential of the antenna 1 is positive with respect to the ground 2, the diode 3 becomes conductive, and the diode 4 generates a voltage between the antenna 1 and the ground 2 as a high impedance element. When the potential of the antenna 1 is negative with respect to the ground 2, the diode 4 is turned on, and the diode 3 generates a voltage between the antenna 1 and the ground 2 as a high impedance element.

  For example, if the antenna 1 is connected to an appropriate part of the outer casing of the inverter type fluorescent lamp, the ground 2 is grounded, or a wire of about 1 to 2 m is connected and placed on the floor, the capacitor If 5 is a 10 μF electric field capacitor, a voltage of 30 V or more can be generated at both ends of the capacitor 5 in about 10 seconds. Since the power capacity is basically proportional to the charging time, it is possible to use the power regeneration circuit shown in FIG. 1 as a power source by extending the charging time.

  However, in the power regeneration circuit shown in FIG. 1, it cannot be said that the voltage induced in the air is fully utilized. Further, the voltage generated in the circuit shown in FIG. 1 is not stable.

  The present invention has been made in view of such a situation, and is intended to provide a power regeneration device capable of improving the power regeneration efficiency and supplying a stable voltage output.

  The power regeneration device according to the first aspect of the present invention is a power regeneration device composed of a diode and a capacitor. Among the diodes, a diode used for power detection is a constant voltage diode.

  In the power regeneration device according to the first aspect of the present invention, a constant voltage diode is used for power detection.

  The power regeneration device according to the second aspect of the present invention is a power regeneration device comprising a diode and a capacitor, wherein the switch for switching whether or not the power detected by the diode is supplied to the capacitor, and the switch And a control circuit that controls switching of the switch, and the control circuit controls switching of the switch based on a voltage of discharge from the capacitor.

  In the power regeneration device according to the second aspect of the present invention, whether or not the power detected by the diode is supplied to the capacitor is switched, and switching of the switch is controlled based on the voltage of the discharge from the capacitor. Is done.

  A power regeneration device according to a third aspect of the present invention is a power regeneration device including a diode and a capacitor, and is detected by the first capacitor for storing power, the second capacitor for storing power, and the diode. A first switch that switches an output from the diode so that the generated power is supplied to the first capacitor, to the second capacitor, or not to any capacitor; The power stored in the first capacitor, the third capacitor that stores the power stored in the second capacitor, and the first capacitor or the power source as a power supply source for the third capacitor A second switch for switching and connecting a second capacitor, the first switch, and the second switch. And a Gosuru control circuit, said control circuit, based on a discharging voltage from the third capacitor, and controls the switching of the first switch.

  When the first capacitor is being charged, the control circuit uses the second capacitor as a power supply source for the third capacitor, and when the second capacitor is being charged, the first capacitor The second switch can be controlled such that a capacitor serves as a power supply source for the third capacitor.

  The capacitance of the third capacitor can be larger than the capacitance of the first capacitor and the second capacitor.

  The operating power supply supplied to the control circuit may be a part of the electric power discharged from the third capacitor.

  The power regeneration device according to the third aspect of the present invention can further include a power regeneration circuit including a capacitor and a diode for detecting an operation power supply of the control circuit supplied to the control circuit. .

  A diode used for power detection among the diodes of the power regeneration circuit may be a constant voltage diode.

  In the power regeneration device according to the third aspect of the present invention, power is stored in the first capacitor, power is stored in the second capacitor, and power detected by the diode is supplied to the first capacitor. Or whether it is supplied to the second capacitor or not to be supplied to any capacitor, and the power stored in the first capacitor and the power stored in the second capacitor are switched. Power is stored in the third capacitor, and the first capacitor or the second capacitor is switched and connected as a power supply source for the third capacitor, and the diode is used based on the discharge voltage from the third capacitor. Switching of the output destination of the detected power is controlled.

  A power regeneration device according to a fourth aspect of the present invention is a power regeneration device including a diode and a capacitor, a transistor for clamping a discharge voltage discharged from the capacitor, and a predetermined voltage at a base of the transistor. And a voltage supply circuit for supplying.

  The voltage supply circuit is a power regeneration circuit including a capacitor and a diode, and a diode used for power detection among the diodes constituting the power regeneration circuit may be a constant voltage diode.

  In the power regeneration device according to the fourth aspect of the present invention, the transistor is used to clamp the discharge voltage discharged from the capacitor, and a predetermined voltage is supplied to the base of the transistor.

  According to the first to fourth aspects of the present invention, the output voltage can be stabilized.

It is a figure for demonstrating the conventional electric power regeneration circuit. It is a figure for demonstrating 1st Embodiment of the electric power regeneration apparatus to which this invention is applied. It is a figure for demonstrating the output voltage of the electric power regeneration circuit of FIG. It is a figure for demonstrating 2nd Embodiment of the electric power regeneration apparatus to which this invention was applied. FIG. 5 is a detailed circuit diagram of the power regeneration circuit of FIG. 4. FIG. 5 is a diagram for explaining an output voltage of the power regeneration circuit of FIG. 4. It is a figure for demonstrating a diode bridge. It is a figure for demonstrating a diode bridge. It is a figure for demonstrating 3rd Embodiment of the electric power regeneration apparatus to which this invention is applied. It is a figure for demonstrating the cascade connection of the diode bridge of FIG. It is a figure for demonstrating 4th Embodiment of the electric power regeneration apparatus to which this invention is applied. It is a figure for demonstrating 5th Embodiment of the electric power regeneration apparatus to which this invention is applied. It is a figure for demonstrating 6th Embodiment of the electric power regeneration apparatus to which this invention was applied. It is a figure for demonstrating a general down converter. It is a figure for demonstrating 7th Embodiment of the electric power regeneration apparatus to which this invention is applied. It is a figure for demonstrating 8th Embodiment of the electric power regeneration apparatus to which this invention is applied. It is a figure for demonstrating 9th Embodiment of the electric power regeneration apparatus to which this invention is applied.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 is a circuit diagram of the power regeneration circuit in the first embodiment of the power regeneration device of the present invention. In addition, the same code | symbol is attached | subjected to the part corresponding to the conventional case, The description is abbreviate | omitted suitably (hereinafter the same).

  That is, the power regeneration circuit shown in FIG. 2 is configured as a power regeneration circuit that generates a positive voltage with respect to the ground level (that is, a positive charge is accumulated in the capacitor 5). , A positive terminal 16 is provided on the positive side of the capacitor 5, and a power regeneration circuit having a polarity opposite to that of the power regeneration circuit of FIG. 1 is configured by the antenna 12, the diode 13, the diode 14, and the capacitor 15, and the ground As a power regeneration circuit in which a negative voltage is generated with respect to the level (that is, negative charge is accumulated in the capacitor 15), a minus terminal 17 is provided on the minus side of the capacitor 15, and the ground of the two power regeneration circuits is shared. , A ground (GND) terminal 11 is provided.

  Since the conventional power regeneration circuit described with reference to FIG. 1 is a rectifier circuit that receives an alternating current input, even if the output is a direct current component, the other (returning line) is used as long as the alternating current component is flowing in the input. Side, that is, ground) always has an alternating current. The induced voltage of commercial power supplies and inverter type fluorescent lamps is expected to be quite high (for example, the induced voltage of a commercial power supply in a home is about 140 V peak-to-peak) and is shown in FIG. The induced voltage can be efficiently regenerated by the circuit.

  In FIG. 3, the electrostatic capacity of the capacitor 5 and the capacitor 15 in the power regeneration circuit of FIG. 2 is both 22 μF, the antenna 1 is the outer casing of the fluorescent lamp, and the ground terminal 11 is the ground terminal of the oscilloscope (with an appropriate impedance). This shows the voltage measurement curve (when no load is applied) when connected to the ground. In FIG. 3, the curve on the plus axis side is the voltage across the capacitor 5, and the curve on the minus axis side is the voltage across the capacitor 15.

  As shown in FIG. 3, after 80 seconds, the voltage across capacitor 5 is about 38V, the rate of increase begins to decrease (approaching saturation), and the voltage across capacitor 15 is about −5. 1V, not reaching saturation. In the experiment, after a few minutes, the voltage across the capacitor 5 was about 48V, and the voltage across the capacitor 15 was about 37V.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 4, the power regeneration circuit described with reference to FIG. 2 is used as a set of power regeneration circuits 21, and the antenna 1 and the antenna 12 are connected in series (cascade connection). The regenerative efficiency of the induced power can be increased. Here, the three power regeneration circuits of the power regeneration circuit 21-1, the power regeneration circuit 21-2, and the power regeneration circuit 21-3 are connected in series, but the number of power regeneration circuits to be connected is arbitrary. A number is sufficient. In the power regeneration circuit 21-1, the power regeneration circuit 21-2, and the power regeneration circuit 21-3, the polarity of the direct current component is uniquely determined internally, but externally, the alternating current component is completely symmetric. Therefore, the direction of the connection is arbitrary.

  FIG. 5 is a detailed circuit diagram of the power regeneration circuit 21-1, the power regeneration circuit 21-2, and the power regeneration circuit 21-3 in FIG. In FIG. 5, the antenna 12 of the power regeneration circuit 21-1 and the antenna 1 ′ of the power regeneration circuit 21-2 are connected, and the antenna 12 ′ of the power regeneration circuit 21-2 and the antenna 1 of the power regeneration circuit 21-3 are connected. ", For example, the connection direction of the power regeneration circuit 21-2 is reversed and the antenna 12 of the power regeneration circuit 21-1 and the antenna of the power regeneration circuit 21-2 are connected. 12 ′ and the antenna 1 ′ of the power regeneration circuit 21-2 and the antenna 1 ″ of the power regeneration circuit 21-3 are also connected, the plus terminal 16 ′ and the minus from the power regeneration circuit 21-2. The output from the terminal 17 'does not change because it is an alternating current.

  In the power regeneration circuit 21-1 to the power regeneration circuit 21-3 described with reference to FIG. 4 and FIG. 5, it is not possible to add a voltage across each circuit (in each power regeneration circuit). , Become an independent power source).

  In FIG. 6, the electrostatic capacity of the internal capacitor is 100 μF / 63 V (50 μF capacitor 5 and capacitor 15 are connected in series) in each of the power regeneration circuit 21-1 to power regeneration circuit 21-3 in FIG. When an antenna 12 ″ is connected to an induction source 22 such as an outer casing of a fluorescent lamp to an oscilloscope ground terminal 23 (connected to the ground with an appropriate impedance), it is obtained after a few minutes and after the circuit has stabilized. Indicates the power supply voltage (no load) value.

  In this case, in the power regeneration circuit 21-1, a voltage of 30V on the plus side and 14V on the minus side was generated, and a voltage generated between the plus terminal 16 and the minus terminal 17 was about 43V. In the power regeneration circuit 21-2, a voltage of 14.1V is generated on the plus side and 12.6V is generated on the minus side, and a voltage generated between the plus terminal 16 'and the minus terminal 17' is about 26. In the power regeneration circuit 21-3, a voltage of 11.6V is generated on the positive side and 13V is generated on the negative side, and the regenerative voltage generated between the positive terminal 16 ″ and the negative terminal 17 ″ is It was about 24.3V.

  In this way, a sufficient amount of voltage is charged in the internal capacitors (capacitor 5 and capacitor 15) by cascading a plurality of power regeneration circuits.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  The power regeneration circuit described with reference to FIG. 2 is a circuit in which a circuit having a reverse polarity is connected to the power regeneration circuit described with reference to FIG. 1 with a common ground, but FIG. Circuits of the same polarity are connected with a common ground.

  7B is a modification of the circuit in FIG. 7A, and it is needless to say that FIG. 7A and FIG. 7B are the same circuit. Since the capacitor 5 and the capacitor 15 have the same rating here, the internal capacitor of the circuit of FIG. 7C, which is an equivalent circuit to the circuit of FIG. 7B, is the capacitor 5 (or capacitor 15). Is equal to

  The circuit in FIG. 7C is the same as the bridge circuit in FIG. That is, the power regeneration circuit shown in FIG. 7A is the same as the power regeneration circuit described with reference to FIG. The bridge circuit is an equivalent circuit.

  Further, as shown in FIG. 8, the power regeneration circuit described with reference to FIG. 1 is configured by connecting a power regeneration circuit having a reverse polarity with the ground, as illustrated in FIG. 8A. The power regeneration circuit is the same as that shown in FIG. 8B as in the case described with reference to FIG. 7, and the capacitor 5 and the capacitor 15 have the same rating in this case as well. The internal capacitor of the circuit shown in FIG. 8C, which is an equivalent circuit to the circuit, is equal to the capacitor 5 (or capacitor 15).

  The circuit in FIG. 8C is the same as the bridge circuit in FIG. That is, a power regeneration circuit having a polarity opposite to that of the power regeneration circuit described with reference to FIG. 1 shown in FIG. 8A and a circuit having the same polarity as the circuit are connected with a common ground. The power regeneration circuit and the bridge circuit shown in FIG. 8D are equivalent circuits.

  The bridge circuit shown in FIG. 7D and the bridge circuit shown in FIG. 8D are the same circuit and are general rectifier circuits having capacitors for smoothing and energy storage. Since these bridge circuits are also symmetric with respect to the antenna 1 and the antenna 12, it is not necessary to distinguish each antenna.

  Therefore, as illustrated in FIG. 9A, the bridge circuit 31 is described as including a terminal 41 and a terminal 42, diodes 43 to 46, and a capacitor 47. The bridge circuit 31 is an equivalent circuit to the bridge circuit shown in FIG.

  Also in the bridge circuit 31 shown in FIG. 9A, either the terminal 41 or the terminal 42 is connected to the ground with an appropriate impedance such as an induction source such as an outer casing of a fluorescent lamp and a ground terminal of an oscilloscope. When connected to the connected point, the electromotive force generated by induction is regenerated, and charges are accumulated in the capacitor 47 by the diodes 43 to 46.

  Furthermore, as shown in FIG. 10, it is also possible to regenerate power more efficiently by cascading an arbitrary number of bridge circuits 31 as in the case described with reference to FIGS. is there.

  Next, a fourth embodiment of the present invention will be described with reference to FIG.

  The power regeneration circuit shown in FIG. 11 is configured by cascading power supply generation circuits that generate a positive voltage with respect to the ground level. The voltage charged in the capacitor 65 by the diode 63 and the diode 64 can be supplied from the terminal 69 and the terminal 70, and the voltage charged in the capacitor 68 by the diode 66 and the diode 67 is supplied from the terminal 71 and the terminal 72. Is possible.

  In this case, unlike the first to third embodiments, the grounds of the respective voltage generation sources are not common. That is, the power supplied from the terminal 69 and the terminal 70 and the power supplied from the terminal 71 and the terminal 72 are independent of each other.

  In the power regeneration circuit shown in FIG. 11, the capacitances of the capacitor 65 and the capacitor 68 are both 22 μF, the antenna 61 and the antenna 62 are in the outer casing of the fluorescent lamp, and the terminal 71 and the terminal 72 corresponding to the ground are the oscilloscope. The voltage when the output voltage reaches equilibrium after a few minutes is 35V between the terminal 69 and the terminal 70, and between the terminal 71 and the terminal 72. It was 14V.

  In FIG. 11, the cascade connection is described as having two stages, but it goes without saying that cascade connection of three or more stages is also possible.

  In the power regeneration circuits of the first to fourth embodiments of the present invention described above, it is possible to increase power regeneration efficiency, supply a high voltage, or provide a plurality of power supplies. It was a thing. Hereinafter, in the fifth to ninth embodiments of the present invention, a power regeneration circuit for the purpose of stabilizing the output voltage will be described.

  A fifth embodiment of the present invention will be described with reference to FIG.

  The power regeneration circuit of FIG. 12A has basically the same configuration as the power regeneration circuit described with reference to FIG. 1 except that a constant voltage diode 81 is provided instead of the diode 2. Yes. The power regeneration circuit in FIG. 12B is a power regeneration circuit in which the polarity of each of the diode 3, the capacitor 5, and the constant voltage diode 81 is reversed in the power regeneration circuit in FIG.

  By using the constant voltage diode 81, the voltage across the capacitor 5 does not become larger than the voltage value defined by the constant voltage diode 81. For example, the voltage value defined by the constant voltage diode 81 is designed according to the rating of an IC or the like that receives the supply of power output from the output terminal 82, so that the element such as an IC connected to the output side It becomes possible to prevent destruction.

  Since the constant voltage diode 81 has a positive temperature coefficient and a negative temperature coefficient depending on its voltage output, the output voltage is limited. Therefore, the temperature characteristics of the output voltage can be improved by selecting the diode 3 and the constant voltage diode 81 so that the temperature characteristics thereof are positive and negative.

  Next, a sixth embodiment of the present invention will be described with reference to FIG.

  The power regeneration circuit of FIG. 13 uses FIG. 1 except that a switch 91 composed of, for example, a CMOSFET and a controller 92 for controlling the switch 91 are newly provided between the diode 3 and the capacitor 5. The power regeneration circuit basically has the same configuration as described above. The controller 92 detects the voltage discharged from the capacitor 5 to control the switch 91 and receives supply of power for the operation of the controller 92 from the same line.

  In FIG. 13, the detection of the output voltage and the supply of power are illustrated as different inputs to the controller 92, but the detection of the output voltage and the supply of power are performed by the same input. Of course.

  The controller 92 limits the charge current supplied to the capacitor 5 by controlling on / off of the switch 91 so that the output voltage becomes a value within a certain range. The method of charging the capacitor 5 is similar in principle to a switching regulator. However, in the power regeneration circuit shown in FIG. 13, the impedance of the power source due to the electric field detected by the antenna 1 is very high. Even if there is no inductance between the diode 3 and the capacitor 5, the capacitor 5 can be charged with a substantially constant current.

  FIG. 14 shows a circuit example of a general down converter. The controller 106 controls the switch 102 to limit the charge current supplied to the capacitor 105. In the down converter, an inductance 104 is connected to supply a constant current to the capacitor 105, and a flywheel diode 103 is prevented in order to prevent a load on the output side from being destroyed by a counter electromotive force from the inductance 104. Is connected.

  On the other hand, the power regeneration circuit described with reference to FIG. 13 does not require the inductance 104 and the flywheel diode 103, and the number of components is small, so that the circuit can be configured at low cost.

  In the power regeneration circuit of FIG. 13, constant current charging is performed on the capacitor 5 without providing an inductance, so that a ripple having a triangular wave shape is generated in the capacitor 5. This level can be set under the control of the controller 92. Also, the load from the load connected to the output terminal 93 is controlled by the controller 92 by controlling the switching of the switch 91 by the controller 92, so that the output from the output terminal 93 can be obtained as in the case of a normal switching regulator. It is possible to control.

  The controller 92 is constituted by a microcontroller having a small current consumption value. The controller 92 does not need to control on / off of the switch 91 at a frequency of about 100 Hz, for example, unlike a normal switching regulator. Accordingly, the controller 92 can further reduce the current consumption by several μA by lowering the clock frequency.

  Next, a seventh embodiment of the present invention will be described with reference to FIG.

  The switch 111 and the switch 112 are controlled by the controller 116. The controller 116 detects the voltage discharged from the capacitor 115 and controls the switch 111. In addition, the controller 116 controls the switch 112 in conjunction with the control of the switch 111, and is stored in one of the capacitor 113 and the capacitor 114. In addition, the capacitor 115 is supplied with the electric charge from the same line and the power supply for the operation of the controller 116 is received from the same line.

  The electric power obtained by the antenna 1 due to the electric field is supplied to the capacitor 113 or the capacitor 114 by the switch 111 and stored therein. The switch 111 is also provided with an open terminal. The controller 116 detects the output voltage of the capacitor 115, and if necessary, outputs the output of the diode 3 so that the output voltage does not exceed a certain value. , Connected to the open terminal of the switch 111.

  When the capacitances of the capacitor 113 and the capacitor 114 are equal, the capacitor 113 and the capacitor 114 are basically connected to the diode 3 by the switch 111 at the same time, but the on-duty of each is different. You may make it control so.

  The charges accumulated in the capacitor 113 and the capacitor 114 are accumulated in the capacitor 115 through the switch 112. According to the control of the controller 116, the switch 112 is connected to the capacitor 115 through the antenna 1, the diode 4, and the switch 111, which is not being charged (charging), out of the capacitor 113 or the capacitor 114. It is switched to discharge (discharge) the accumulated charge.

  As the capacitor 115, an element having a capacitance larger than that of the capacitors 113 and 114 is selected. For example, if the capacitance of the capacitor 113 and the capacitor 114 is 10 μF and the voltage after charging is 50 V, if the capacitance of the capacitor 115 is 100 μF, the charge Q = capacitance C × voltage V is Since the charge is stored, 5V is obtained as the output voltage. That is, the electric power generated by the electric field obtained by the antenna 1 is stored at a high voltage in the capacitor 113 and the capacitor 114 having a small capacity, and is supplied to the capacitor having a large capacity, thereby minimizing the energy loss. It is possible to increase the current capacity by lowering the voltage near the operating voltage.

  Next, an eighth embodiment of the present invention will be described with reference to FIG.

  The power regeneration circuit of FIG. 16 has basically the same configuration as FIG. 15 except that the power regeneration circuit described with reference to FIG. 12 is used as the power supply circuit 121 as the power supply source of the controller 116. Have.

  That is, in the power regeneration circuit described with reference to FIG. 15, the controller 116 uses a part of the output of the capacitor 115 as a power source necessary for the operation, so that the power output from the output terminal 93 is used. Loss occurs. On the other hand, in the power regeneration circuit of FIG. 16, the controller 116 is supplied with power necessary for operation from the power supply circuit 121 whose output voltage is limited to a constant voltage by the constant voltage diode 81. Yes.

  Here, by setting the capacitance of the capacitor 5 of the power supply circuit 121 to be smaller than the capacitance of the capacitor 115, the accumulated charge is discharged from the capacitor 115 and power is supplied from the output terminal 93. First, power can be supplied to the controller 116 so that the controller 116 can start operation.

  Next, a ninth embodiment of the present invention will be described with reference to FIG.

  The voltage supplied from the power supply circuit 121 is a constant value based on the rating of the constant voltage diode 81. In the power regeneration circuit of FIG. 17, the output of the power supply circuit 121 is supplied to the base of the transistor 141, the base emitter voltage of the transistor 141 is clamped to a constant voltage, and a constant voltage power is supplied from the output terminal 93. It is made to do.

  In the power regeneration circuit in FIG. 17, for example, even when the value of the load connected to the output terminal 93 decreases and the current increases, the output voltage from the output terminal 93 is the terminal of the capacitor 5. The output can be stabilized at a value lower than the voltage.

  The power regeneration circuit of FIG. 17 wastes the regenerated power by the amount of the collector-emitter voltage. However, the constant voltage that is sufficiently practical with a very simple circuit configuration rather than incorporating a switching regulator. Can be provided (that is, a low-cost power regeneration circuit can be provided).

  Note that in FIG. 17, the constant voltage is supplied to the base of the transistor 141 using the power supply circuit 121, but if a constant voltage can be supplied to the base of the transistor 141, Instead of the power supply circuit 141, a circuit having a different configuration may be used.

  As described above, by dramatically improving the power generation efficiency when extracting the inductive power present in the environment, for example, a sufficient power source for operating an IC or the like is supplied to a general commercial power source or a generator. It becomes possible to supply without depending on.

  In addition, the electric power generated by taking out the inductive power present in the environment is high in voltage as it is, but the current value is extremely small, so conversion that lowers the voltage and increases the current value can be performed. It was necessary to carry out while minimizing the loss. In the present invention, the output voltage can be stabilized at a constant voltage, and a general IC or the like can be prevented from being destroyed by a high voltage, and a sufficiently operable current can be supplied.

  1 antenna, 3, 4 diode, 5 capacitor, 11 GND terminal, 12 antenna, 13, 14 diode, 15 capacitor, 16 plus terminal, 17 minus terminal, 31 bridge circuit, 43 to 46 diodes, 47 capacitor, 61, 62 antenna , 63, 64 diode, 65 capacitor, 66, 67 diode, 68 capacitor, 69 to 72 terminals, 81 constant voltage diode, 91 switch, 92, controller, 93 output terminal, 111, 112 switch, 112 to 115 capacitor, 116 controller 121 power supply circuit 141 transistor

Claims (10)

In a power regeneration device composed of a diode and a capacitor,
A power regeneration device in which a diode used for power detection among the diodes is a constant voltage diode. In a power regeneration device composed of a diode and a capacitor,
A switch for switching whether to supply the power detected by the diode to the capacitor;
A control circuit for controlling switching of the switch,
The control circuit controls switching of the switch based on a voltage of discharge from the capacitor. In a power regeneration device composed of a diode and a capacitor,
A first capacitor for storing power;
A second capacitor for storing power;
A first switch that switches the output from the diode so that the power detected by the diode is supplied to the first capacitor, to the second capacitor, or not to any capacitor. And the switch
A third capacitor for storing the power stored in the first capacitor and the power stored in the second capacitor;
A second switch for switching and connecting the first capacitor or the second capacitor as a power supply source for the third capacitor;
A control circuit that controls switching of the first switch and the second switch;
The control circuit controls switching of the first switch based on a discharge voltage from the third capacitor. When the first capacitor is being charged, the control circuit uses the second capacitor as a power supply source for the third capacitor, and when the second capacitor is being charged, the first capacitor The power regeneration device according to claim 3, wherein the second switch is controlled so that a capacitor serves as a power supply source of the third capacitor. The power regeneration device according to claim 3, wherein the capacitance of the third capacitor is larger than the capacitances of the first capacitor and the second capacitor. The power regeneration device according to claim 3, wherein the power supply for operation supplied to the control circuit is a part of the power discharged from the third capacitor. The power regeneration device according to claim 3, further comprising a power regeneration circuit including a capacitor and a diode for detecting an operation power supply of the control circuit supplied to the control circuit. The power regeneration device according to claim 7, wherein a diode used for power detection among the diodes of the power regeneration circuit is a constant voltage diode. In a power regeneration device composed of a diode and a capacitor,
A transistor for clamping a discharge voltage discharged from the capacitor;
And a voltage supply circuit for supplying a predetermined voltage to the base of the transistor. The voltage supply circuit is a power regeneration circuit composed of a capacitor and a diode,
The power regeneration device according to claim 9, wherein a diode used for power detection among the diodes constituting the power regeneration circuit is a constant voltage diode.

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