TWI462424B - Method of exciting primary coils in contactless power supply device and contactless power supply device - Google Patents

Description

Excitation method of primary coil of non-contact power supply device and non-contact power supply device

The present invention relates to a method for exciting a primary coil of a non-contact power supply device and a contactless power supply device.

In recent years, various non-contact power supply systems using non-contact power supply technology have been proposed. In particular, the non-contact power supply system using electromagnetic induction is being put into practical use.

In the non-contact power supply system using the electromagnetic induction method, the non-contact power supply device is provided with a plurality of primary coils in parallel with the mounting surface of the electronic device on which the contactless power supply is to be placed. On the one hand, a power receiving device is provided on an electronic device that receives contactless power supply from a contactless power supply device, and the power receiving device is provided with a secondary coil.

In addition, in Japanese Patent No. 46369773, when an electronic device is placed on a mounting surface of a contactless power supply device, a face of a plurality of primary coils provided on the non-contact power supply device is disposed in the electronic device. The primary coil of the secondary coil on the power receiving device of the machine is selected. Then, the selected primary coil is driven by excitation to supply secondary electric power to the secondary coil.

In the non-contact power supply device of Japanese Patent No. 4,693,773, an oscillating circuit (resonance circuit) for driving each primary coil is used, and each primary coil is appropriately connected to its resonant circuit and is driven by excitation. . Therefore, the excitation frequencies of the primary coils are the same.

Advanced Technology Literature Patent Literature

Patent Document 1 Japanese Patent No. 46297773

However, the use of the non-contact power supply system is also widespread, and the number of primary coils corresponding to one non-contact power supply device tends to increase. It is also conceivable to combine the use forms of a plurality of non-contact power supply devices.

When the number of primary coils corresponding to one non-contact power supply device is increased, in the above-described non-contact power supply device, the load becomes large and a plurality of oscillation circuits must be used. In a contactless power supply device using a plurality of oscillation circuits, a case where the selected primary coils are respectively connected to different oscillation circuits and are excited to be driven may occur.

At this time, the excitation frequency and the amplitude value of the selected primary coil are deviated due to factors such as the individual difference of the circuit elements of the respective oscillation circuits and the temperature difference around them. This deviation is related to the deviation of the secondary power supplied to the secondary coil, and it is difficult to supply stable secondary power.

Then, in order to stabilize the secondary power, it is conceivable to provide a smoothing capacitor having a large capacity in the power receiving device. However, the cost of the smoothing capacitor having a large capacity is increased, and the size of the capacitor is large, and the power receiving device is increased in size. Further, it is also conceivable to use a constant voltage power supply circuit such as a three-terminal regulator in the power receiving device, but the power loss during rectification is large and the power supply efficiency is lowered.

This also has the same problem in the form of using a plurality of non-contact power supply devices to supply power to a power supply device of one electronic device.

The present invention has been made to solve the above problems, and an object of the invention is to provide a primary coil excitation method and a contactless power supply for a non-contact power supply device capable of suppressing variation in excitation frequency of each primary coil for power supply and improving power supply efficiency. Device.

In one aspect, a method for exciting a primary coil of a non-contact power supply device, the contactless power supply device having a plurality of primary coils (L1a to L1d) and a plurality of power supply unit circuits for respectively exciting a plurality of primary coils ( M), and supplying power to the power receiving device facing the at least one primary coil by using an electromagnetic induction phenomenon, wherein the excitation method of the primary coil of the non-contact power supply device comprises: composing the plurality of primary coils a primary coil of the complex array; and a supply of the synchronization signal, comprising: supplying a synchronization signal to the power supply unit circuit of each group of the power supply unit circuits respectively corresponding to the primary coils of the complex array, and supplying power to the complex array The unit circuit supplies synchronization signals having the same frequency such that the primary coils of the aforementioned complex array are excitedly driven by the same frequency.

Moreover, in one aspect, the non-contact power supply device is provided with a primary coil of a complex array and a power supply unit circuit that respectively activates a primary coil of the complex array, and uses an electromagnetic induction phenomenon toward the primary coil of the complex array. And supplying power to the power receiving device facing at least one of the primary coils, wherein the plurality of unit control units respectively supply a plurality of unit control units for supplying the synchronization signals to the power supply units of the plurality of arrays, and having a plurality of unit control units The resulting sync signal has the same frequency.

The contactless power supply device may further include a clock signal generation circuit connected to the plurality of unit control units for generating a plurality of unit control units for generating a common clock signal having synchronization signals of the same frequency, and respectively supplying the plurality of clock signals to the plurality of unit signals. Unit control unit.

Further, one of the plurality of unit control units may include a clock signal generation circuit, and the other unit control unit may supply a clock signal generated by the clock signal generation circuit.

In one aspect, the contactless power supply device has a complex array a secondary coil and a power supply unit circuit that respectively activates a plurality of primary coils of the complex array, and supplies power to the power receiving device facing at least one primary coil of the primary coil of the multiple array by electromagnetic induction phenomenon, a plurality of unit control units for supplying synchronization signals to the power supply unit of the complex array; and a frequency comparison circuit connected to the plurality of unit control units and for generating a plurality of synchronizations by the plurality of unit control units The frequencies of the signals are compared with each other, and a plurality of control signals are respectively supplied to the plurality of unit control sections such that the plurality of synchronization signals have the same frequency.

The frequency comparison circuit may further include: a sampling circuit for sampling a plurality of synchronization signals generated by the plurality of unit control units; and a control circuit connected to the sampling circuit, according to the sampling signal sampled by the sampling circuit, Calculating the respective frequencies of the plurality of synchronization signals generated by the plurality of unit control units, and using the frequency of one of the plurality of synchronization signals that have been calculated as a reference, the control signal is directed to the unit corresponding to the remaining synchronization signals. The control unit supplies the remaining synchronizing signals having a frequency that coincides with the frequency of one of the synchronizing signals.

(First embodiment)

Hereinafter, a first embodiment in which the non-contact power supply device of the present invention is embodied will be described with reference to the drawings.

1 is a perspective view showing an overall view of a non-contact power supply device (hereinafter, simply referred to as a power supply device) 1 and an electronic device (hereinafter simply referred to as a device) E that is subjected to contactless power supply from the power supply device 1.

The frame 2 of the power supply device 1 has a bottom plate 3 having a quadrangular shape, and the side plates 4 are formed to extend upward from the periphery of the bottom plate 3, and the flat plate 5 formed of tempered glass blocks the side faces formed by the side plates. Open opening Formed by the Ministry. Further, the upper surface of the flat plate 5 serves as a mounting surface 6 on which the machine E is placed.

As shown in FIG. 2, a plurality of primary coils L1 are disposed in the flat plate 5. In the present embodiment, there are 16 primary coils L1, and four are arranged in the X direction in parallel with the mounting surface 6 of the flat plate 5, and four are arranged in the Y direction.

Further, as shown in FIG. 2, in the space formed in the bottom plate 3, the side plates 4, and the flat plate 5 (in the casing 2), a power supply unit circuit M (only a part of which is described) connected to each of the primary coils L1 is built in. . Each of the power supply unit circuits M is electrically connected to the corresponding primary coil L1 to excite the corresponding primary coil L1. Each of the primary coils L1 is separately or in cooperation with the other primary coils L1 and is excited to drive the contactless power supply to the device E placed on the mounting surface 6.

Further, as shown in FIG. 2, the signal receiving antenna 7 is disposed and fixed to the inner side of each of the primary coils L1. The communication between the device E placed on the mounting surface 6 and the power supply unit circuit M corresponding to the signal receiving antenna 7 is performed by wireless communication.

Further, in the present embodiment, for convenience of explanation, the 16 primary coils L1 disposed on the flat plate 5 are divided into two in the X direction, and divided into two in the Y direction, and four primary coils L1. Compiled into 1 group. In order to distinguish the primary coil L1 of the first to fourth groups G1 to G4, "a", "b", "c", and "d" are added after the symbol "L1". Therefore, in FIG. 2, the four primary coils L1 of the first group G1 of the upper right are represented as the primary coil L1a, and the four primary coils L1 of the second group G2 of the upper left are expressed as the primary coil L1b. Further, the four primary coils L1 of the third group G3 in the lower right are shown as the primary coil L1c and the four primary coils L1 of the fourth group G4 in the lower left. The table is described as a primary coil L1d.

The device E placed on the mounting surface 6 of the power supply device 1 is such that the signal transmitting antenna 9 is wound around the secondary coil L2 so as to surround the secondary coil L2. When the machine E is placed on the mounting surface 6 of the power supply device 1, the signal receiving antenna 7 surrounding the primary coils L1a to L1d and the signal transmitting antenna 9 of the device E located at the immediately lower position thereof are wirelessly communicated. Conducting information and information.

Next, the electronic configuration of the power supply device 1 and the device E will be described with reference to FIG.

(machine E)

First, explain the machine E. In FIG. 3, the machine E has a power receiving circuit 20 as a power receiving device for receiving secondary power from the power supply device 1. As shown in FIG. 4, the power receiving circuit 20 includes a rectifying and smoothing circuit unit 21, a DC/DC converting circuit 22, a data generating circuit unit 23, and a transmitting circuit unit 24.

The rectifying and smoothing circuit unit 21 is connected to the secondary coil L2. The rectifying and smoothing circuit unit 21 excites the secondary electric power that is supplied to the secondary coil L2 by the electromagnetic induction generated by the excitation of the primary coils L1a to L1d of the power supply device 1 to be converted into a ripple-free DC voltage. The DC/DC conversion circuit 22 performs DC/DC conversion on the DC voltage generated by the rectification smoothing circuit unit 21 at a desired voltage, and supplies the DC/DC converted DC voltage to the load Z of the machine E.

Here, it suffices that the load Z is driven by the secondary electric power generated by the secondary coil L2. For example, the load Z may be driven on the mounting surface 6 by using a DC/DC converted DC power source, or the secondary power may be used as an AC power source to drive the load Z on the mounting surface 6. Machine. In addition, it is also possible to use a DC/DC converted DC power supply to the inside. Built a rechargeable battery (secondary battery) to charge the machine.

Further, the rectified DC power supply of the DC voltage after the DC/DC conversion can also be used as a driving source of the data generating circuit unit 23 and the transmitting circuit unit 24.

The data generation circuit unit 23 is a circuit that generates a device authentication signal ID and an excitation request signal RQ and outputs the same to the transmission circuit unit 24. The machine authentication signal ID indicates to the power supply device 1 that the device E is an authentication signal that can receive power from the power supply device 1. The excitation request signal RQ is a request signal for requesting power supply from the power supply device 1.

The data generation circuit unit 23 is configured to generate a device authentication signal ID and an excitation request signal RQ, for example, when the rectification and smoothing circuit unit 21 is outputting a DC power source or can be driven by a secondary battery built in the device E or the like. It is output to the transmission circuit unit 24. Further, the data generation circuit unit 23 does not generate the device authentication signal ID and the excitation request signal RQ when the power switch for driving the load Z is turned off, for example, on the device E.

Further, the data generation circuit unit 23 is configured such that a microcomputer is provided in the device E, and when the microcomputer determines to stop the power supply, the device authentication signal ID and the excitation request signal RQ are not generated.

The transmission circuit unit 24 is connected to the signal transmission antenna 9. The transmission circuit unit 24 receives the device authentication signal ID and the excitation request signal RQ from the data generation circuit unit 23, and transmits it to the power supply device 1 via the signal transmission antenna 9.

(Power supply device 1)

In FIG. 3, the power supply device 1 includes a power supply unit circuit M corresponding to each of the primary coils L1a to L1d of each of the groups G1 to G4, unit control units 8a to 8d of each group, and a clock signal generation circuit 28.

Further, in the power supply device 1, the power supply unit circuit M corresponding to each of the primary coils L1a to L1d of each of the groups G1 to G4 and the unit control unit of each group 8a~8d are the same circuit configuration. Therefore, for convenience of explanation, the power supply unit circuit M corresponding to one primary coil L1a of the first group G1 and the unit control unit 8a that integrally controls the power supply unit circuit M of the first group G1 will be described.

As shown in FIG. 5, the power supply unit circuit M has a reception circuit unit 31, a signal extraction circuit unit 32, and an excitation drive circuit unit 33.

The receiving circuit unit 31 is connected to the signal receiving antenna 7. The receiving circuit unit 31 receives the transmission signal transmitted from the signal transmitting antenna 9 of the device E placed on the mounting surface 6 via the signal receiving antenna 7. The receiving circuit unit 31 outputs the received transmission signal to the signal extracting circuit unit 32.

The signal extraction circuit unit 32 extracts the device authentication signal ID and the excitation request signal RQ from the transmission signal. When the signal extraction circuit unit 32 extracts two signals of the device authentication signal ID and the excitation request signal RQ from the transmission signal, the signal control unit 8a outputs the permission signal EN. At this time, the signal extracting circuit unit 32 adds a unit identification signal identifying the own power supply unit circuit M together with the permission signal EN, and outputs it to the unit control unit 8a.

By the way, when the signal extraction circuit unit 32 extracts only one of the device authentication signal ID and the excitation request signal RQ or when both signals are not extracted, the permission signal EN is not output to the unit control unit 8a.

The excitation drive circuit unit 33 is connected to the primary coil L1a, and in the present embodiment, the same primary primary coil L1 constitutes a half bridge circuit. Therefore, the excitation drive circuit unit 33 has switching transistors such as two MOS transistors.

The synchronizing signals PS1 and PS2 shown in Figs. 6(a) and 6(b), which are composed of pulse signals for ON·OFF, are input to the gate terminals of the two transistors from the unit control unit 8a. The synchronization signals PS1, PS2 respectively input to the gate terminals of the respective transistors are complementary signals and when a transistor is ON, The other transistor becomes OFF.

In detail, while the device E is placed on the placement surface 6 and the signal extraction circuit unit 32 continues to output the permission signal EN to the unit control unit 8a, the unit control unit 8a continuously outputs the synchronization signals PS1 and PS2. Therefore, in this case, the exciting drive circuit portion 33 continuously drives the primary coil L1a by excitation.

Further, when the device E is not placed on the mounting surface 6, the unit control unit 8a intermittently outputs the synchronization signals PS1, PS2 only for a predetermined period of time. Therefore, in this case, the excitation drive circuit unit 33 intermittently excites the primary coil L1a for a predetermined period of time.

The intermittent excitation drive of the primary coil L1a is such that when the machine E is placed on the mounting surface 6, the secondary power that can directly drive the load Z of the device E is not supplied, but the charger that can load the load Z is supplied. The degree of secondary power. Then, based on the charging voltage, the data generating circuit unit 23 and the transmitting circuit unit 24 of the device E for wireless communication with the power feeding device 1 are driven.

When the signal extraction circuit unit 32 does not output the permission signal EN, the excitation drive circuit unit 33 intermittently excites the primary coil L1a in the same manner as when the device E is not placed on the placement surface 6.

As shown in FIG. 5, the unit control unit 8a includes a power supply circuit unit 35 and a control circuit unit 36 that collectively controls the power supply unit circuits M of the first group.

The power supply circuit unit 35 includes a rectifier circuit and a DC/DC converter circuit, and the power supply voltage VE is input from the external power supply 38 (see FIG. 3) and rectified by the rectifier circuit. The power supply circuit unit 35 converts the rectified DC voltage into a desired voltage by a DC/DC converter circuit, and outputs the DC voltage to the control circuit unit 36 as a drive power source.

The control circuit unit 36 is based on a picture from the clock signal generating circuit 28. The clock signal CLK shown in FIG. 6(c) generates the synchronization signals PS1 and PS2 shown in FIGS. 6(a) and 6(b) which are output to the excitation drive circuit unit 33 of the power supply unit circuit M. The control circuit unit 36 has a forward and reverse circuit that generates a synchronization signal PS1 that is one of the synchronizations with the clock signal CLK from the clock signal generation circuit 28. The control circuit unit 36 inverts the generated one of the synchronization signals PS1 via the inverter circuit to generate the other synchronization signal PS2.

Further, in the present embodiment, the control circuit unit 36 generates the synchronization signals PS1 and PS2. However, only one of the synchronization signals PS1 may be generated and output to the excitation drive circuit unit 33 of each power supply unit circuit M. Further, in the excitation drive circuit unit 33 of each power supply unit circuit M, the other synchronization signal PS2 may be generated from one of the synchronization signals PS1.

The control circuit unit 36 receives the permission signal EN from the signal extraction circuit unit 32. The control circuit unit 36 determines from which power supply unit circuit M the license signal EN is output based on the unit identification signal added to the permission signal EN. Next, the control circuit unit 36 continuously outputs the synchronization signals PS1 and PS2 to the identified power supply unit circuit M, and the primary drive L1a is continuously excited and driven by the excitation drive circuit unit 33.

Further, when the size of the device E that can be supplied with power and the power supply is large and is placed on the mounting surface 6 of the power supply device 1, two or more primary coils L1a may be positioned directly below.

In this case, each of the power supply unit circuits M corresponding to the primary coils L1a located at the lower position of the device E receives the excitation request signal RQ and the device authentication signal ID of the device E individually, and respectively, to the control circuit unit 36. The license signal EN is output.

The control circuit unit 36 is based on the addition from each power supply unit circuit M. The permission signal EN having the module identification signal determines whether or not the device E disposed on the primary coil L1a of each power supply unit circuit M is the same device.

At this time, in the case where the size is large, the primary coil L1a of each of the power supply unit circuits M can be determined to be non-isolated but an aggregate of the adjacent primary coils L1a in accordance with the permission signal EN of each of the power supply unit circuits M.

Next, the control circuit unit 36 outputs the synchronization signals PS1 and PS2 simultaneously to the respective power supply unit circuits M that are positioned below the mounted device E and continuously output the excitation request signal RQ and the device authentication signal ID.

Therefore, the plurality of power supply unit circuits M cooperate to energize the plurality of primary coils L1 to supply power to a large-sized machine E.

Further, two or more devices E requiring power supply may be placed on the mounting surface 6 of the power supply device 1.

In this case, the power supply unit circuit M corresponding to the primary coil L1 positioned at the lower position of each device E receives the excitation request signal RQ and the device authentication signal ID corresponding to the corresponding device, respectively, to the control circuit unit 36. The license signal EN is output.

The control circuit unit 36 determines whether or not the device E placed on each power supply unit circuit M is placed one or more, or two or more, based on the permission signal EN from the power supply unit circuit M to which the module identification signal is added. .

At this time, in the case of two or more cases, it is possible to determine that each of the power supply unit circuits M is located at a position distant from each other in accordance with the permission signal EN of each power supply unit circuit M.

Next, the control circuit unit 36 outputs the synchronization signals PS1 and PS2 to the respective power supply unit circuits M that are positioned below the two or more devices E that are placed and continuously output the permission signal EN. Therefore, the power supply unit circuit M corresponding to each device E excites each primary coil L1, and separately for each device E Power is supplied.

Further, the control circuit unit 36 generates the synchronization signals PS1 and PS2 to be output to the excitation drive circuit unit 33 in accordance with the clock signal CLK (see FIG. 6(c)) from the clock signal generation circuit 28. That is, the control circuit unit 36 generates the synchronization signals PS1 and PS2 synchronized with the clock signal CLK and outputs them to the excitation drive circuit unit 33. Therefore, the synchronization signals PS1 and PS2 of the same period are output to the respective excitation drive circuit sections 33 of the power supply unit circuit M provided in the four primary coils L1a of the first group. As a result, the excitation frequencies of the primary coils L1a of the first group are the same.

The clock signal generating circuit 28 has an oscillating circuit, and the power source voltage VE is input from the external power source 38 to oscillate the oscillating circuit, and the clock signal CLK shown in FIG. 6(c) is generated in accordance with the oscillating signal. The clock signal CLK generated by the clock signal generating circuit 28 is output to the control circuit unit 36 provided in the unit control units 8a to 8d of the respective groups G1 to G4.

Therefore, the synchronization signals PS1 and PS2 of the same cycle are output from the unit control units 8a to 8d to the excitation drive circuit unit 33 of each of the power supply unit circuits M provided in each group. As a result, the excitation frequencies of the primary coils L1a to L1d of the respective groups G1 to G4 are the same.

Next, the operation of the power supply device 1 configured as described above will be described.

Now, when the power switch (not shown) is turned on and the power supply device 1 is supplied with power, the power supply voltage VE is supplied from the external power supply 38 to the clock signal generating circuit 28 of the power supply device 1 and the unit control units 8a to 8d of the respective groups G1 to G4. supply.

The clock signal generating circuit 28 generates a clock signal CLK based on the power source voltage VE from the external power source 38, and outputs it to the unit control units 8a to 8d of the respective groups G1 to G4.

On the other hand, the unit control units 8a to 8d receive the power supply voltage VE from the external power source 38 in the power supply circuit unit 35 of the unit control units 8a to 8d, respectively. Then, each of the power supply circuit units 35 of the unit control units 8a to 8d is converted into a desired DC voltage, and then output as a drive power source to the control circuit unit 36 of the unit control units 8a to 8d, and to the unit. The power supply unit circuits M controlled by the control units 8a to 8d are output.

The control circuit unit 36 of each of the unit control units 8a to 8d generates the synchronization signals PS1 and PS2 when the external power source 38 is input from the power supply circuit unit 35 and the clock signal CLK is input from the clock signal generation circuit 28. At this time, since the control circuit unit 36 of each of the unit control units 8a to 8d generates the synchronization signals PS1 and PS2 in synchronization with the common clock signal CLK, the synchronization signal generated by the control circuit unit 36 of each of the unit control units 8a to 8d is generated. The periods of PS1 and PS2 are the same. The control circuit unit 36 of each of the unit control units 8a to 8d outputs the generated synchronization signals PS1 and PS2 to the respective power supply unit circuits M controlled by the unit control units 8a to 8d.

Each of the power supply unit circuits M controlled by the unit control units 8a to 8d intermittently excites the primary coil L1 in accordance with the synchronization signals PS1 and PS2. That is, all of the primary coils L1 (L1a to L1d) forming the power supply device 1 are intermittently excited, and wait for the standby state of the excitation request signal RQ and the machine authentication signal ID from the device E.

Not long after, when the machine E is placed, the machine E generates the machine authentication signal ID and the excitation request signal RQ, and the machine authentication signal ID and the excitation request signal RQ are directed toward the power supply unit directly under the machine E via the signal transmitting antenna 9. The signal receiving antenna 7 of the circuit M transmits.

Next, the signal receiving antenna 7 extracts the machine authentication from the signal extraction circuit unit 32 from the device E receiver authentication signal ID and the excitation request signal RQ. Signal ID and excitation request signal RQ. The signal extraction circuit unit 32 outputs the permission signal EN to the control circuit unit 36 of the unit control units 8a to 8d.

The control circuit unit 36 of the unit control units 8a to 8d understands that the primary coil L1 of the power supply unit circuit M is carrying the device E that can be supplied with power and requires power supply, based on the permission signal EN from the power supply unit circuit M. Next, the control circuit unit 36 of the unit control units 8a to 8d continuously outputs the synchronization signals PS1 and PS2 to the excitation drive circuit unit 33 of the power supply unit circuit M. Therefore, the primary coil L1 positioned at the position where the organic device E is placed starts to be continuously excited.

Here, there is a case where the size of the machine E is large and the primary coils L1a to L1d of the respective groups G1 to G4 are located at the position immediately below. In this case, the power supply unit circuits M corresponding to the primary coils L1a to L1d positioned directly under the machine E output the permission signal EN to the control circuit units 36 of the corresponding unit control units 8a to 8d, respectively.

Next, the control circuit unit 36 of the unit control units 8a to 8d simultaneously outputs the synchronization signal PS1 to each of the power supply unit circuits M of the primary coils L1a to L1d of the respective groups G1 to G4 immediately below the placed device E. PS2.

Therefore, the plurality of power supply unit circuits M of the respective groups G1 to G4 cooperate to activate the plurality of primary coils L1a to L1d to supply power to one large-sized machine E.

At this time, since the control circuit unit 36 of each of the unit control units 8a to 8d generates the synchronization signals PS1 and PS2 in synchronization with the common clock signal CLK, the synchronization signal generated by the control circuit unit 36 of each of the unit control units 8a to 8d is generated. The periods of PS1 and PS2 are the same.

Therefore, the excitation frequency of the primary coils L1a to L1d excited by the excitation drive circuit portion 33 of the power supply unit circuit M of each of the groups G1 to G4 Become the same excitation frequency.

Next, after the primary coils L1a to L1d of the respective groups G1 to G4 are continuously excited at the same excitation frequency, the device E receives the contactless power supply from the power supply device 1, and drives the load Z by the secondary power.

Here, when the device E is detached from the mounting surface 6, or the excitation request signal RQ disappears and the permission signal EN is not output, the unit control units 8a to 8d wait for a new permission from the power supply unit circuit M. Signal EN. Next, the unit control units 8a to 8d intermittently output the synchronization signals PS1 and PS2 to the power supply unit circuit M. Therefore, the primary coil L1 is intermittently excited to drive. That is, it is in a standby state waiting for the excitation request signal RQ and the device authentication signal ID from the device E.

Next, the effects of the first embodiment configured as described above are described below.

(1) In the power supply device 1 in which the plurality of primary coils L1 are disposed in the power supply device 1, the plurality of primary coils are grouped into the first to fourth groups G1 to G4. Further, unit control units 8a to 8d are provided for each of the groups G1 to G4 for collectively controlling the power supply unit circuits M provided corresponding to the primary coils L1a to L1d to which the group belongs.

Next, the common clock signal CLK from the clock signal generating circuit 28 is output to the unit control units 8a to 8d provided in the respective groups G1 to G4. The control circuit unit 36 of the unit control units 8a to 8d generates synchronization signals PS1 and PS2 for exciting the respective primary coils L1a to L1d in accordance with the common clock signal CLK. Then, it is output to the power supply unit circuit M of each of the groups G1 to G4. Since the synchronizing signals PS1 and PS2 are square wave pulse signals of the same period, the exciting frequencies of the primary coils L1a to L1d of the respective groups G1 to G4 become the same exciting frequency.

Therefore, the machine E receives the contactless power supply from the power supply device 1 in a state where the primary coils L1a to L1d are driven by the same excitation frequency.

As a result, the variation in the secondary power supplied to the secondary coil L2 due to the variation in the excitation frequency of the primary coils L1a to L1d is reduced, and stable secondary power can be supplied.

(2) In the present embodiment, the excitation frequencies of the primary coils L1a to L1d of the respective groups G1 to G4 on the power feeding device 1 side are set to be the same. Therefore, there is no fixed-voltage power supply circuit in which a large-capacity high-priced and large-sized smoothing capacitor is provided on the machine E side to stabilize the secondary power, or a three-terminal regulator that uses a large power loss during rectification is not used. situation.

(3) In the present embodiment, the power supply circuit unit 35 is provided in the unit control units 8a to 8d of the respective groups G1 to G4. Therefore, the power supply circuit unit 35 of each group can supply the drive power only to the power supply unit circuit M to which the group belongs, and the load can be reduced to reduce the circuit scale.

Further, in the present embodiment, the power supply device 1 is provided with the 16 primary coils L1, but the present invention is not limited thereto. For example, it may be applied to a plurality of 20, 40, 48, 50, etc. The power supply device 1 in which the coil L1 is formed.

Further, in the present embodiment, although four groups G1 to G4 are grouped, they may be implemented by dividing into four complex arrays. In this case, the more the number of groups, the greater the effect.

In the present embodiment, the four primary coils L1 are set to one set, but are not limited to four, and may be implemented as one set other than four. In this case, the greater the number of primary coils L1 corresponding to one set, the greater the effect. At this time, the more the number of groups, the greater the effect.

Further, in the present embodiment, each primary coil L1 of the power supply device 1 is provided Each of the primary coils L1 disposed in the one housing 2 (flat panel 5) is grouped into the respective groups G1 to G4. It is constructed as a single unit that can be separated from each other, and can also be applied to each of the groups of the monomers to be connected to one power supply device 1. In this case, it is necessary to provide the clock signal generating circuit 28 in any of the cells, and to provide the clock signal CLK generated by the clock signal generating circuit 28 to the unit control unit 8a of each unit. ~8d output.

With such a configuration, when the power supply device 1 is installed over a wide area such as the floor or the wall, the single-system connection can be realized in accordance with the size, so that the excitation frequency of each of the primary coils L1 can be made inexpensive at the same time. Power supply device 1.

Of course, the clock signal generating circuit 28 can also be provided in advance for all the cells. Then, when each group of the respective units is connected to form one power supply device 1, one of the clock signal generation circuits 28 is selected, and the clock signal CLK of the selected clock signal generation circuit 28 is selected. It is output to the unit control units 8a to 8d of the respective units.

(Second embodiment)

Next, a second embodiment will be described based on Fig. 7 .

The first embodiment includes a clock signal generation circuit 28 that outputs a clock signal CLK to the unit control units 8a to 8d of the respective groups. Conversely, in the present embodiment, the clock signal generating circuit 28 is omitted. In addition, in the present embodiment, the control circuit unit 36 included in the unit control unit 8a of the first group G1 is configured to generate the clock signal CLK.

Therefore, in the present embodiment, the same components as those in the first embodiment will be omitted for convenience of explanation, and only the features will be described in detail.

In Fig. 7, the control circuit unit 36 of the unit control unit 8a of the first group G1 The oscillation circuit is the same as the oscillation circuit provided in the clock signal generation circuit 28 of the first embodiment. The oscillation circuit is oscillated by inputting a power supply voltage VE from the external power supply 38, and generates a clock signal CLK in accordance with the oscillation signal. Next, the synchronization signals PS1, PS2 in the own unit control portion 8a are generated in accordance with the generated clock signal CLK.

Further, the control circuit unit 36 of the unit control unit 8a outputs the generated clock signal CLK to the control circuit unit 36 provided in the unit control units 8b to 8d of the other groups G2 to G4. The control circuit unit 36 provided in each of the unit control units 8b to 8d is a circuit similar to that of the first embodiment, and generates synchronization signals PS1 and PS2 in accordance with the input clock signal CLK.

Therefore, the synchronization signals PS1 and PS2 of the same period are output from the unit control units 8a to 8d to the excitation drive circuit unit 33 of each of the power supply unit circuits M provided in the first to fourth groups G1 to G4. As a result, the excitation frequencies of all the primary coils L1 (L1a to L1d) on the power supply device 1 are the same.

According to this embodiment, the same effects as those of the first embodiment can be obtained.

Further, in the present embodiment, the clock signal CLK is generated in the unit control unit 8a of the first group G1, but the present invention is not limited thereto, and may be generated in any of the control circuit units 36 of the other unit control units 8b to 8d. Clock signal.

In the present embodiment, the primary coils L1 of the power supply device 1 are placed on the flat plate 5 of one housing 2, and the primary coils L1 disposed in the one housing 2 (flat plate 5) are arranged in the same manner as in the first embodiment. Compose each group G1~G4. It can also be applied to form a monomer which can be separated from each other, and each group of these monomers can be connected into one power supply device 1.

With such a configuration, when the power supply device 1 is installed in a wide area such as the floor or the wall, the single-system connection can be achieved by matching the size, so that the excitation frequency of each primary coil L1 can be inexpensively provided. Electrical device 1.

In the same manner as the first embodiment, the present embodiment can be implemented by appropriately changing the number of primary coils L1, the number of sets, and the number of primary coils L1 of each group.

(Third embodiment)

Next, a third embodiment will be described based on Fig. 8 .

In the second embodiment, the control circuit unit 36 of one group generates the clock signal CLK. According to the present embodiment, the control circuit unit 36 of all the unit control units 8a to 8d has a configuration in which the clock signal CLK for generating the synchronization signals PS1 and PS2 is generated.

Therefore, in the present embodiment, the same components as those of the second embodiment will be omitted for convenience of explanation, and only the features will be described in detail.

In the control circuit unit 36 provided in the unit control units 8a to 8d of the respective groups G1 to G4, the power supply voltage is input from the external power source 38 in the same manner as the control circuit unit 36 of the unit control unit 8a of the second embodiment. VE. Next, the control circuit unit 36 of each of the unit control units 8a to 8d generates clock signals CLKa to CLKd as shown in Figs. 10(a), 10(d), 10(g), and 10(j), respectively. Next, the control circuit unit 36 of each of the unit control units 8a to 8d generates the respective clock signals CLKa to CLKd as shown in Figs. 10(b), 10(e), 10(h), and 10(k). One of the synchronization signals PS1a to PS1d shown. Further, similarly to the above-described embodiment, the control circuit unit 36 of each of the unit control units 8a to 8d generates FIG. 10(c), FIG. 10(f), and FIG. 10(i) in accordance with each of the synchronization signals PS1a to PS1d. The other synchronization signals PS2a to PS2d shown in Fig. 10 (1).

Further, the control circuit unit 36 of each of the unit control units 8a to 8d is configured to provide a synchronization signal PS1a to PS1d which is generated one by one to the power supply. The frequency comparison circuit 40 of the device 1 outputs.

Here, for convenience of explanation, one of the synchronization signals PS1a outputted to the frequency comparison circuit 40 by the unit control unit 8a is referred to as "reference clock signal PS1a". The one of the synchronization signals PS1b to PS1d outputted to the frequency comparison circuit 40 by the other unit control units 8b to 8d is referred to as "control clock signal PS1b to PS1d".

For the other control clock signals PS1b to PS1d, the reference clock signal PS1a is a clock signal of the reference frequency, and the control clock signals PS1b to PS1d are adjusted to the clock signal of the frequency of the reference clock signal PS1a.

As shown in FIG. 9, the frequency comparison circuit 40 provided in the power supply device 1 includes first and second selection circuits 41 and 42, an AD conversion circuit 43, a memory circuit 44, and a circuit 41 configured by a microcomputer. Control circuit 45 of ~44.

The first selection circuit 41 inputs the reference clock signal PS1a and the control clock signals PS1b to PS1d. The first selection circuit 41 is selectively input in a predetermined period of time in accordance with the control of the control circuit 45 in the order of the reference clock signal PS1a → control clock signal PS1b → control clock signal PS1c → control clock signal PS1d, and repeats. The first selection circuit 41 outputs the reference clock signal PS1a and the control clock signals PS1b to PS1d which are sequentially input to the AD conversion circuit 43.

The AD conversion circuit 43 is an AD conversion circuit built in the sampling circuit, and samples the input reference clock signal PS1a and the control clock signals PS1b to PS1d in sequence.

First, the AD conversion circuit 43 samples the sampling signal of the extremely short period with respect to the reference clock signal PS1a of the square wave pulse signal shown in FIG. At this time, the control circuit 45 obtains the reference clock signal PS1a (square wave pulse signal) No.) The number of samples at high potential (high level) and the number of samples at low level (low level). The control circuit 45 calculates the frequency of the reference clock signal PS1a based on the number of samples thus obtained.

The control circuit 45 temporarily stores the calculated frequency of the reference clock signal PS1a in the memory circuit 44 composed of a rewritable EEPROM (erasable programmable read only memory). At this time, the frequency of the reference clock signal PS1a calculated by the previous calculation processing and stored in the memory circuit 44 is updated to the frequency of the new reference clock signal PS1a.

Thereafter, the AD conversion circuit 43 samples the control clock signals PS1b to PS1d, and the control circuit 45 obtains the number of samples of the control clock signals PS1b to PS1d, and sequentially calculates the frequencies of the control clock signals PS1b to PS1d.

The control circuit 45 controls the frequency of the clock signals PS1b to PS1d to be between the frequencies of the control clock signals PS1b to PS1d and the frequency of the reference clock signal PS1a stored in the memory circuit 44, after the frequencies of the control clock signals PS1b to PS1d are sequentially calculated. The comparison process is performed in sequence.

Then, when the frequency of the reference clock signal PS1a is different from the frequency of the control clock signals PS1b to PS1d, the control circuit 45 performs the frequency of the different control clock signals PS1b to PS1d as the reference clock. Processing of the frequency of the signal PS1a.

More specifically, for example, when the frequency of the control clock signal PS1b is different from the frequency of the reference clock signal PS1a, the frequency of the control clock signal PS1b is generated as the control signal CTb which becomes the frequency of the reference clock signal PS1a.

The control clock signal (synchronization signal) PS1b is generated in synchronization with the clock signal CLKb generated by the control circuit unit 36 of the unit control unit 8b itself. Therefore, the control signal CTb is adjusted to the control power of the unit control unit 8b. The control signal of the period of the clock signal CLKb generated by the path portion 36. The control value of the control signal CTb corresponding to the different frequency is a memory that is previously obtained and stored in the control circuit 45.

When the control signal CTb corresponding to the control clock signal (synchronization signal) PS1b of the unit control unit 8b is generated, the control circuit 45 controls the second selection circuit 42 to connect the unit control unit 8b to the control circuit 45, and sets the control signal CTb. It is output to the unit control unit 8b. Next, the unit control unit 8b to which the control signal CTb has been input is connected to the control circuit unit 36, and adjusts the frequency of the clock signal CLKb to the frequency of the clock signal CLKa of the unit control unit 8a in accordance with the control value of the same control signal CTb. the same.

Therefore, the unit control unit 8b adjusts the frequency of the synchronization signal PS1b (synchronization signal PS2b) in the control circuit unit 36 to be the same as the frequency of the synchronization signal PS1a (synchronization signal PS2a) of the unit control unit 8a. As a result, the excitation frequencies of the primary coils L1a and L1b of the first group G1 and the second group G2 are the same.

Further, the unit control unit 8b outputs the adjusted synchronization signal PS1b to the frequency comparison circuit 40 as a new control clock signal PS1b. Therefore, a new comparison process is performed using the new control clock signal PS1b.

Similarly, the control clock signals PS1c and PS1d of the other unit control units 8c and 8d are also compared with the reference clock signal PS1a. Then, when the frequencies are different, the control circuit 45 outputs the control signals CTc and CTd to the unit control units 8c and 8d as described above to adjust the frequencies of the synchronization signals PS1c and PS1d.

Therefore, the excitation frequencies of all the primary coils L1 (L1a to L1d) on the power supply device 1 are the same.

According to this embodiment, the same effects as those of the first embodiment can be obtained.

Further, in the third embodiment, each frequency is calculated and compared by comparing the frequency of the reference clock signal (synchronization signal) PS1a with the frequency of the control clock signal (synchronization signal) PS1b to PS1d.

Based on the comparison, the rise and fall of the reference clock signal (synchronization signal) PS1a and the control clock signal (synchronization signal) PS1b to PS1d are obtained. Then, the time between each rise and fall is counted, and the frequency can be compared and compared.

Further, the frequency comparison circuit 40 is formed, for example, as a phase-locked loop frequency synthesizer or the like such that the respective control clock signals (synchronization signals) PS1b to PS1d are the same as the frequency of the reference clock signal (synchronization signal) PS1a.

In the same manner as the first embodiment, each of the primary coils L1 of the power supply device 1 is disposed on the flat plate 5 of one frame 2, and is placed once in each of the one frames 2 (flat plates 5). The coil L1 is grouped into groups G1 to G4. It is also applicable to a power supply device 1 which is constructed by forming a group which can be separated from each other and which is connected to each group of the monomers. In this case, the frequency comparison circuit 40 is provided in each of the cells, and the frequency comparison circuit 40 compares the reference clock signals (synchronization signals) PS1a of the unit control units 8a to 8d of the respective cells. Controls the frequency of the clock signal (synchronization signal) PS1b~PS1d. Further, it is necessary for the frequency comparison circuit 40 to output the control signals CTb to CTd to the unit control units 8b to 8d of the respective units in accordance with the comparison result.

With such a configuration, when the power supply device 1 is installed over a wide area such as a floor or a wall, as long as the single system is connected in accordance with the size, it is possible to inexpensively realize one power supply in which the excitation frequency of each primary coil L1 is the same. Device 1.

Of course, the frequency comparison circuit 40 is set in advance for all the cells. The way to implement it is also possible. In this case, when each of the groups of the respective units is connected to one power supply device 1, one of the frequency comparison circuits 40 is selected. The selected frequency comparison circuit 40 compares the frequency of the reference clock signal (synchronization signal) PS1a and the control clock signal (synchronization signal) PS1b to PS1d. Further, it is necessary for the frequency comparison circuit 40 to output the control signals CTb to CTd to the unit control units 8b to 8d of the respective units in accordance with the comparison result.

In the same manner as the first embodiment, the present embodiment can be implemented by appropriately changing the number of primary coils L1, the number of sets, and the number of primary coils L1 of each group.

Further, in each of the embodiments, the excitation circuit portion 33 provided in the power supply unit circuit M is constituted by a half bridge circuit composed of two switching transistors. However, the present invention is not limited thereto, and four switches can be used. The full bridge circuit formed by the transistor is constructed in such a manner.

Further, in each of the embodiments, the signal receiving antenna 7 is provided for each primary coil L1 in the power supply device 1, and the signal transmitting antenna 9 is provided in the device E, and is performed between the signal transmitting antenna 9 and the corresponding signal receiving antenna 7. The signal is given.

The antenna receiving antenna 7 can also be omitted by omitting the signal provided by each primary coil L1 of the power supply device 1, and each primary coil L1 is also used as the signal receiving antenna 7, and the signal transmitting antenna 9 of the device E is also omitted. This is carried out by using the secondary coil L2 as the signal transmitting antenna 9.

In this case, the transmission circuit unit 24 of the device E is connected to the secondary coil L2, and the device authentication signal LD and the excitation request signal RQ generated by the data generation circuit unit 23 are supplied to the power supply device 1 via the same secondary coil L2. The coil L1 is sent. On the one hand, the receiving circuit unit 31 of the power supply device 1 is connected The coil L1 is connected to the primary coil L1, and the machine authentication signal ID and the excitation request signal RQ from the machine E received by the primary coil L1 are input.

With such a configuration, the amount of the signal transmitting antenna 9 and the signal receiving antenna 7 is omitted, and the cost can be reduced and the size can be reduced.

Further, the antenna 7 can be received by omitting the signal provided for each primary coil L1 of the power supply device 1, and the signal receiving antenna 7 can be used as the primary coil L1, and the device E can be implemented as in the above embodiment.

Needless to say, the power supply device 1 may be implemented in the above-described embodiment, and the signal transmitting antenna 9 of the device E may be omitted, and the secondary transmitting antenna 9 may be used as the secondary transmitting antenna 9 .

In one embodiment, a non-contact power supply device includes a plurality of primary coils (L1a to L1d) and a plurality of power supply unit circuits that respectively activate a plurality of primary coils ( M), and using an electromagnetic induction phenomenon to supply power to a power receiving device facing the at least one primary coil, the method for exciting the primary coil of the non-contact power supply device includes: assembling the plurality of primary coils into a primary coil of a complex array; And supplying a synchronization signal, comprising: supplying a synchronization signal to the power supply unit circuits of each group of the power supply unit circuits respectively corresponding to the primary coils of the complex array, and supplying the power supply unit circuits of the complex array with the same frequency The synchronization signal is such that the primary coil of the aforementioned complex array is driven by the same frequency.

Further, in one embodiment, the non-contact power supply device includes a primary coil (L1a to L1d) of a complex array and a power supply unit circuit (M) that activates a complex array of primary coils of a plurality of arrays, and uses an electromagnetic induction phenomenon. Supplying power to a power receiving device (E) facing at least one of the primary coils of the plurality of primary coils, wherein a plurality of unit control units (8a-8d) are provided, The plurality of unit control units respectively supply synchronization signals to the power supply units of the complex array, and the synchronization signals generated by the plurality of unit control units have the same frequency.

The contactless power supply device may further include a clock signal generating circuit (28) connected to the plurality of unit control units for generating a common clock signal of the synchronization signals having the same frequency for the plurality of unit control units. A plurality of unit control units are separately supplied.

Further, one of the plurality of unit control units may include a clock signal generation circuit, and the other unit control unit may supply a clock signal generated by the clock signal generation circuit.

In one embodiment, the non-contact power supply device includes a primary coil (L1a to L1d) of a complex array and a power supply unit circuit (M) that activates a plurality of primary coils of a complex array, and uses an electromagnetic induction phenomenon toward Supplying at least one of the primary coils of the plurality of primary coils facing the power receiving device (E), comprising: a plurality of unit control units (8a to 8d) respectively supplying the synchronization signals to the power supply units of the complex array; The frequency comparison circuit (40) is connected to the plurality of unit control units, and compares frequencies of the plurality of synchronization signals generated by the plurality of unit control units with each other, and respectively controls the plurality of control signals to the plurality of unit control units Supply so that the plurality of synchronization signals have the same frequency.

The frequency comparison circuit may further include: a sampling circuit (43) for sampling a plurality of synchronization signals generated by the plurality of unit control units; and a control circuit (45) connected to the sampling circuit and sampling according to the sampling circuit The sampling signal calculates the respective frequencies of the plurality of synchronization signals generated by the plurality of unit control units, and uses the frequency of one of the plurality of synchronization signals that have been calculated as a reference to synchronize the control signals with the rest. a unit control unit corresponding to the signal is supplied to generate a signal having a synchronization signal The remaining sync signals of frequencies of uniform frequency.

1‧‧‧Contactless power supply unit (power supply unit)

2‧‧‧ frame

3‧‧‧floor

4‧‧‧ side panels

5‧‧‧ tablet

6‧‧‧Loading surface

7‧‧‧Signal receiving antenna

8a~8d‧‧‧Unit Control Department

9‧‧‧Signal transmitting antenna

20‧‧‧Power receiving circuit

21‧‧‧Rectifying Smoothing Circuit Division

22‧‧‧DC/DC converter circuit

23‧‧‧ Data Generation Circuit Department

24‧‧‧Transmission Circuit Department

28‧‧‧ Clock signal generation circuit

31‧‧‧ Receiving Circuits Department

32‧‧‧Signal Extraction Circuit Department

33‧‧‧Excitation drive circuit department

35‧‧‧Power Circuit Division

36‧‧‧Control Circuit Department

38‧‧‧External power supply

40‧‧‧ frequency comparison circuit

41‧‧‧1st selection circuit

42‧‧‧2nd selection circuit

43‧‧‧AD conversion circuit (sampling circuit)

44‧‧‧ memory circuit

45‧‧‧Control circuit

CLK, CLKa, CLKb‧‧‧ clock signals

CTc, CTd‧‧‧ control signals

E‧‧‧Electronic machines (machines)

EN‧‧‧License signal

Groups 1~4 of G1~G4‧‧‧

ID‧‧‧ machine certification signal

L1a‧‧‧Group 1 G1 4 primary coils L1

L1b‧‧‧Group 2 G2 4 primary coils L1

L1c‧‧‧Group 3 G3 4 primary coils L1

L1d‧‧‧4th group G4 4 primary coils L1

L2‧‧‧second coil

M‧‧‧Power supply unit circuit

PS1a~PS1d‧‧‧Synchronous signal (reference clock signal)

PS1b~PS1d‧‧‧Control clock signal

PS1, PS2‧‧‧ sync signal

RQ‧‧‧ excitation request signal

VE‧‧‧Power supply voltage

Z‧‧‧load

Fig. 1 is a perspective view showing the entire state in which a power feeding device of the first embodiment is placed on a machine.

Fig. 2 is an explanatory view showing a state in which the primary coils are arranged.

Figure 3 is an electrical block circuit diagram of a power supply device and a machine.

Figure 4 is an electrical block circuit diagram of a power receiving circuit disposed on the machine.

Fig. 5 is a view showing an electronic circuit of a part of the electronic components of the power supply device.

Fig. 6(a) is a waveform diagram of one of the synchronization signals, Fig. 6(b) is a waveform diagram of the other synchronization signal, and Fig. 6(c) is a waveform diagram of the clock signal.

Fig. 7 is an electronic circuit diagram showing an electronic configuration of a power supply device according to a second embodiment.

Fig. 8 is an electronic circuit diagram for explaining an electronic configuration of a power supply device according to a third embodiment.

Figure 9 is an electronic block circuit diagram of the frequency comparison circuit.

10(a), 10(b), and 10(c) are waveform diagrams of the clock signal of the first group, one of the synchronization signals, and the other of the synchronization signals, and FIG. 10(d) and FIG. 10(e) Fig. 10(f) is a waveform diagram of the clock signal of the second group, one of the synchronization signals, and the other of the synchronization signals, and Fig. 10(g), Fig. 10(h), and Fig. 10(i) are the third The waveform diagram of the clock signal of one group, the synchronization signal of one side, and the synchronization signal of the other, FIG. 10(j), FIG. 10(k), FIG. 10(l) are the clock signals of the fourth group, and one synchronization signal. And the waveform diagram of the synchronization signal of the other party.

1‧‧‧Contactless power supply unit (power supply unit)

2‧‧‧ frame

3‧‧‧floor

4‧‧‧ side panels

5‧‧‧ tablet

6‧‧‧Loading surface

E‧‧‧Electronic machines (machines)

L2‧‧‧second coil

Claims (6)

A method for exciting a primary coil of a non-contact power supply device, the non-contact power supply device comprising a plurality of primary coils and a plurality of power supply unit circuits for respectively exciting a plurality of primary coils, and utilizing an electromagnetic induction phenomenon toward at least one primary coil The power supply device of the facing power supply device is characterized in that: the excitation method of the primary coil of the non-contact power supply device includes: a primary coil that combines the plurality of primary coils into a complex array; and a synchronization signal, which includes: Supplying a synchronization signal to the power supply unit circuits of each group of the power supply unit circuits respectively corresponding to the primary coils of the complex array, and supplying synchronization signals having the same frequency to the power supply unit circuits of the complex array to make the aforementioned complex array The primary coil is driven by the same frequency. A contactless power supply device comprising a primary coil of a complex array and a power supply unit circuit for exciting a plurality of primary coils of a complex array, and utilizing an electromagnetic induction phenomenon toward at least one of the primary coils of the complex array The power receiving device facing the primary coil is powered; wherein the non-contact power supply device further includes: a plurality of unit control units respectively supplying the synchronization signals to the power supply unit circuits of the complex array, and having a plurality of The synchronization signal generated by the unit control unit has the same frequency. A contactless power supply device according to claim 2, comprising: a clock signal generating circuit connected to the plurality of unit control units, and configured to use the plurality of unit control units to generate synchronization having the same frequency The common clock signals of the signals are supplied to the plurality of unit control units, respectively. For example, the non-contact power supply device of claim 3, wherein the aforementioned complex One of the plurality of unit control units includes the clock signal generation circuit, and supplies a clock signal generated by the clock signal generation circuit to another unit control unit. A contactless power supply device comprising a primary coil of a complex array and a power supply unit circuit for exciting a plurality of primary coils of a complex array, and utilizing an electromagnetic induction phenomenon toward at least one of the primary coils of the complex array The power receiving device facing the primary coil is powered; wherein the non-contact power supply device further includes: a plurality of unit control units respectively supplying the synchronization signals to the power supply unit of the multiple array; and the frequency comparison circuit, which is connected The plurality of unit control units compare the frequencies of the plurality of synchronization signals generated by the plurality of unit control units with each other, and supply a plurality of control signals to the plurality of unit control units to cause the plurality of synchronization signals Have the same frequency. The non-contact power supply device of claim 5, wherein the frequency comparison circuit comprises: a sampling circuit for sampling the plurality of synchronization signals generated by the plurality of unit control units; and a control circuit, And connecting to the sampling circuit, calculating respective frequencies of the plurality of synchronization signals generated by the plurality of unit control units based on the sampling signals sampled by the sampling circuit, and synchronizing using one of the plurality of synchronization signals that have been calculated The frequency of the signal is used as a reference, and the control signal is supplied toward the unit control unit corresponding to the remaining synchronization signals to generate the remaining synchronization signals having frequencies coincident with the frequency of one synchronization signal.