JP2003018847A - Non-contact power supply device for control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power supply device for control which can manipulate an object connected with a secondary unit from a primary unit without entering a place where the secondary unit is provided. SOLUTION: When a push-button switch 31 is turned on, a resistor R2 is short-circuited, a resistance value of the resistor connected with an input terminal Rin of a drive IC 33 is varied, the oscillation frequency of the drive IC 33 deviates significantly from a resonance frequency determined by a secondary winding of a coupling transformer 4 and a resonance capacitor C3, and the output voltage of the coupling transformer 4 is approximately zero. Then, a constant voltage diode ZD1 is turned off, a transistor Q3 is turned off, a collector current applied to the transistor Q3 via a resistor R8 is applied to a base of a transistor Q4, and the transistor Q4 is turned on. By turning on the transistor Q4, a level of an input to an input terminal. In of a microcomputer 62 is changed from high to low and, on this change of this input level, an LED drive pattern is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply device for control, and more particularly, to an object connected to a secondary side unit without wrapping around at an arrangement position of the secondary side unit.
The present invention relates to a contactless power supply device for control that can be operated from a primary unit.

[0002]

2. Description of the Related Art There is a non-contact power supply device in which a primary side unit and a secondary side unit of a coupling transformer can be separated. In this non-contact power supply device, the outlet of the primary unit is plugged into the commercial power supply indoors, and the secondary unit is placed outdoors. Then, both units are arranged so as to face each other with a window glass or the like interposed therebetween, and electric power is supplied from the indoor to the outdoor so as to turn on an illumination or the like connected to the outdoor secondary unit. In such a non-contact power supply device, an indoor commercial power supply can be used outdoors without opening a window glass, a door, or the like while keeping indoors and outdoors closed.

[0003]

Here, for example, when an illumination is connected to the secondary unit, a switching control circuit is required to switch the lighting pattern of the illumination. Such a control circuit is provided in the secondary unit to which the electric decoration is connected.

However, if the control circuit for switching the lighting pattern of the electric decoration is provided in the secondary unit, the operation switch must be provided in the secondary unit as well. Therefore, the operator has to go out to operate the operation switch, which is not convenient. That is, the non-contact power supply device has to go out for the switching operation of the lighting pattern, though the commercial power supply can be used outdoors with the indoor and outdoor closed. There is a problem. Especially, in the winter season when the non-contact power supply is used as a power supply for the illumination of the Christmas tree, such an operation becomes very troublesome.

The present invention has been made to solve the above-mentioned problems, and it is possible to prevent the object connected to the secondary unit from wrapping around to the position where the secondary unit is disposed.
It is an object of the present invention to provide a non-contact power supply device for control which can be operated from a primary unit.

[0006]

In order to achieve this object, a non-contact power supply device for control according to claim 1 has a coupling transformer in which a primary side unit and a secondary side unit are used separately. , Non-contact electric power is supplied from the primary side unit of the coupling transformer to the secondary side unit by electromagnetic induction, and the secondary side unit is based on an alternating current flowing in a primary side winding of the primary side unit. Of a second rectifying and smoothing circuit that rectifies and smoothes an alternating current flowing through a secondary winding to output a direct current voltage, a voltage holding circuit that holds an output voltage of the second rectifying and smoothing circuit, and a voltage holding circuit of the voltage holding circuit. A constant voltage output circuit that outputs a stable constant voltage based on the output voltage, a control circuit that is driven by the constant voltage that is output from the constant voltage output circuit, and an output voltage of the second rectifying and smoothing circuit that is less than a predetermined voltage. And a signal output circuit for outputting a predetermined signal to the control circuit, the primary side unit outputs the predetermined signal from the signal output circuit to the control circuit. There is provided an operation circuit for stopping the alternating current flowing through the line or changing the frequency of the alternating current so that the output voltage of the second rectifying and smoothing circuit of the secondary side unit becomes less than a predetermined voltage.

According to the non-contact power supply device for control of the first aspect, the alternating current flows through the secondary winding of the secondary unit based on the alternating current flowing through the primary winding of the primary unit. . The alternating current flowing through the secondary winding is rectified and smoothed by the second rectifying and smoothing circuit, and output as a DC voltage from the second rectifying and smoothing circuit. The output voltage of the second rectifying / smoothing circuit is held by the voltage holding circuit, a stable constant voltage is output by the constant voltage output circuit based on the output voltage of the voltage holding circuit, and the control circuit is driven by the constant voltage. It When the alternating current flowing in the primary winding is stopped or the frequency thereof is changed by the operation circuit of the primary unit, the output voltage of the second rectifying and smoothing circuit of the secondary unit becomes less than the predetermined voltage, and the signal A predetermined signal is output from the output circuit to the control circuit. In this way, the operation circuit of the primary side unit of the coupling transformer can output a predetermined signal to the control circuit of the secondary side unit. That is, the control circuit of the secondary unit can be operated from the primary unit.

A non-contact power supply device for control according to a second aspect is
The non-contact power supply device for control according to claim 1, wherein the control circuit stores a plurality of lighting patterns of a plurality of electric decorations and is output from the signal output circuit by operating an operation circuit of the primary unit. The lighting pattern of the electric decoration stored in the plurality of patterns is switched based on a predetermined signal.

A non-contact power supply device for control according to a third aspect of the present invention is
The non-contact power supply device for control according to claim 1 or 2, wherein the primary unit rectifies and smoothes an alternating current to output a direct current, and outputs from the first rectifying and smoothing circuit. A drive circuit that oscillates in order to flow a direct current as an alternating current to the primary winding, and the operation circuit stops the oscillation of the drive circuit or changes the oscillation frequency thereof, The alternating current flowing through the side winding is stopped or the frequency of the alternating current is changed so that the output voltage of the second rectifying / smoothing circuit of the secondary side unit becomes less than a predetermined voltage.

According to the non-contact power supply device for control of the third aspect of the present invention, the same operation as the non-contact power supply device for control of the first or second aspect is achieved, and in the primary side unit, the alternating current is the first. The direct current is output after being rectified and smoothed by the rectifying and smoothing circuit. This direct current flows as an alternating current in the primary winding due to the oscillation of the drive circuit, and as a result, an alternating current flows in the secondary winding of the secondary unit due to electromagnetic induction. The DC voltage is output by the 2 rectification smoothing circuit. Here, the operation circuit of the primary side unit stops the oscillation of the drive circuit or changes its oscillation frequency, so such operation stops the alternating current flowing in the primary winding or changes the frequency of the alternating current. To be done. As a result, the alternating current of the secondary winding of the secondary unit stops or the frequency changes, so that the output voltage of the second rectifying and smoothing circuit becomes less than the predetermined voltage, and the signal output circuit sends a predetermined signal to the control circuit. Is output.

A non-contact power supply device for control according to a fourth aspect is
The non-contact power supply device for control according to any one of claims 1 to 3, wherein a secondary of the secondary unit is so arranged that an oscillation frequency of the primary unit and a resonance frequency of the secondary unit become equal. A resonance circuit is connected to the side winding.

A non-contact power supply device for control according to claim 5 is
5. The control non-contact power supply device according to claim 4, wherein the oscillation frequency of the primary unit deviates from the resonance frequency of the secondary unit when the disposition interval between the primary unit and the secondary unit is small. The primary side unit is provided with a frequency correction circuit for doing so.

A non-contact power supply device for control according to claim 6 is
The non-contact power supply device for control according to claim 4 or 5,
The primary side unit rectifies and smoothes an alternating current to output a direct current, and a direct current output from the first rectifying and smoothing circuit is supplied to the primary winding as an alternating current. And a frequency correction circuit for changing the oscillation frequency of the drive circuit so that the oscillation frequency of the primary side unit deviates from the resonance frequency of the secondary side unit. .

A non-contact power supply device for control according to claim 7 is
The non-contact power supply device for control according to any one of claims 1 to 6, depending on an arrangement state of the secondary unit,
A changeover switch is provided for switching the power supply to the primary side unit between supply and disconnection.

The non-contact power supply device for control according to claim 8 is
The control non-contact power supply device according to claim 7, wherein the changeover switch cuts off power supply to the primary side unit when the secondary side unit is not arranged to face the primary side unit. .

A non-contact power supply device for control according to claim 9 is
9. The non-contact power supply device for control according to claim 7 or 8, wherein the changeover switch includes the primary unit when the primary unit and the secondary unit are directly opposed to each other without an intervening member. The power supply to the side unit is cut off.

A non-contact power supply device for control according to a tenth aspect is the non-contact power supply device for control according to any one of the first to ninth aspects, wherein the primary core of the primary unit and the secondary unit are The secondary-side iron core has a side surface formed in a C-shape and is used by arranging the C-shaped end surfaces so as to face each other.

The non-contact power supply device for control according to claim 11 is the non-contact power supply device for control according to any one of claims 1 to 10, wherein the primary side unit faces the secondary side unit. It is provided with a casing formed of a metal having a high conductivity, which covers the other parts.

[0019]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a circuit diagram of a non-contact power supply device 1 for lighting, which uses the non-contact power supply device for control of the present invention for lighting a light. This non-contact power supply device 1 for lighting supplies electric power by sandwiching an inclusion 50 such as a window glass or a wall to turn on the lighting of the LED array 7 or the like (see FIG. 3). 1 rectification smoothing circuit 2, drive circuit 3, coupling transformer 4, second rectification smoothing circuit 5
The LED drive circuit 6 and the LED array 7 are provided.

The first rectifying / smoothing circuit 2 is a circuit for rectifying and smoothing an AC voltage supplied from a commercial power source through a power outlet 11 into a DC voltage and outputting the DC voltage.
B1 and a smoothing capacitor C1 are provided. The positive terminal of the first rectifying / smoothing circuit 2 has a coupling transformer 4 which will be described later.
Of the main transformer TR of the primary side winding 41c (see FIG. 2) connected to the center tap 41e,
Both ends of 1c are connected to the drain terminals of the N-MOS switching devices Q1 and Q2 of the drive circuit 3, respectively.

The drive circuit 3 is a circuit for supplying an alternating current to the primary winding 41c of the main transformer TR of the coupling transformer 4. The switching devices Q1, Q of the drive circuit 3 are connected to the negative terminal of the first rectifying / smoothing circuit 2 described above.
2 are connected to the source terminals thereof, and the gate terminals of the switching devices Q1 and Q2 are resistors R for limiting the drive currents of the switching devices Q1 and Q2.
Output terminals Ou of the drive IC 33 via the R4 and R5, respectively.
It is connected to t1 and Out2. A timing generation capacitor C2 is connected to the input terminal Cin of the drive IC 33, and the other end of the capacitor C2 is connected to the negative terminal of the first rectifying and smoothing circuit 2. In addition, drive IC3
The input terminal Rin of 3 has resistors R1 to R1 for timing generation.
R3 is connected in series, and the other ends of the resistance series R1 to R3 connected in series are connected to the negative terminal of the first rectifying and smoothing circuit 2. Further, a push button switch 31 is connected in parallel with the timing generating resistor R2, and a correction switch 32 is connected in parallel with the timing generating resistor R3.

The drive IC 33 has two output terminals Out1 and Ou.
It is an IC that alternately turns on and off the switching devices Q1 and Q2 connected to t2, and for example, a switching regulator controller TL494 manufactured by Texas Instruments Incorporated is used. The on / off cycle (oscillation frequency of the drive IC 33) is determined by the capacitance of the capacitor C2 connected to the input terminal Cin and the resistance values of the resistors R1 to R3 connected to the input terminal Rin. Therefore, when the push button switch 31 or the correction switch 32 is turned on, the resistance value connected to the input terminal Rin changes, so the on / off cycle of the switching devices Q1 and Q2 (oscillation frequency of the drive IC 33) also changes. To do.

The push button switch 31 is a switch for switching the lighting pattern of the LED array 7,
The switch 31 is kept on only while the switch 31 is pressed, and is turned off when the switch 31 is released. On the other hand, the correction switch 32 is sandwiched between the primary side unit 41 and the secondary side unit 42 when the space between the primary side unit 41 and the secondary side unit 42 of the coupling transformer 4 becomes too narrow, that is, between the primary side unit 41 and the secondary side unit 42. When the thickness of the inclusion 50 such as a window glass or a wall is thin, the secondary side unit 42
This switch is used to prevent the output voltage of the output from becoming abnormally high. The correction switch 32 is different from the push button switch 31 and is configured by a switch that holds the ON or OFF operation state even after the operation of the switch is released.

The correction switch 32 has a driving IC 33 which is dependent on the thickness of an inclusion 50 such as a window glass or a wall sandwiched between the primary unit 41 and the secondary unit 42.
Since it is a switch for changing the oscillating frequency, it is constituted by a variable resistor whose resistance value can be changed between 0Ω and several kiloΩ instead of the switch which is switched on or off as in the embodiment. You may do it. If the correction switch 32 is composed of a variable resistor, the oscillation frequency of the drive IC 33 can be adjusted according to the thickness of the inclusion 50 such as a window glass or a wall sandwiched between the primary unit 41 and the secondary unit 42. It can be adjusted to optimize the power supply from the primary unit 41 to the secondary unit 42.

The coupling transformer 4 mainly comprises the primary winding 41.
The main transformer TR is provided with a center tap 41e at c, and a resonance capacitor C3 connected in parallel to the secondary winding 42c of the main transformer TR. The resonance capacitor C3 is a capacitor that forms a resonance circuit together with the secondary winding 42c, and has a capacitance such that the frequency of the primary winding current of the coupling transformer 4 and the resonance frequency of the secondary are equal. Has been adjusted. That is, the drive circuit 3
The resonance capacitor C so that the oscillation frequency of the drive IC 33 and the resonance frequency on the secondary side in the OFF state of the push button switch 31 and the correction switch 32 are equal to each other.
3 capacities have been adjusted. Therefore, the resonance capacitor C3 facilitates the flow of current to the secondary side of the coupling transformer 4 and enables sufficient power supply to the secondary side.

FIG. 2 is a side sectional view of the coupling transformer 4. In FIG. 2, the center tap 41e of the primary winding 41c and the resonance capacitor C3 connected in parallel with the secondary winding 42c are not shown.

As shown in FIG. 2, the coupling transformer 4 is divided into a primary side unit 41 and a secondary side unit 42, which are separately housed in the cover bodies 41a and 42a. Primary iron core 41b and secondary iron core 42b
Are used in such a manner that their side surfaces are both formed in a C shape and the C-shaped end surfaces are arranged so as to face each other so as not to intersect each other (see FIG. 2). The primary side iron core 41b and the secondary side iron core 42b have the yoke portions 41d and 42d formed sufficiently long, and the primary side winding 41c to the secondary side winding 4 are formed.
The power supply efficiency of the electric power supplied to 2c by electromagnetic induction is improved. That is, the length L of the yoke portions 41d and 42d
Is preferably twice the gap length G between the primary unit 41 and the secondary unit 42 (L> 2).
G), the primary iron core 41b and the secondary iron core 4 of this embodiment
2b is so configured. This yoke part 41
d and 42d include a primary winding 41c and a secondary winding 4
2c are each wound. The primary side iron core 41b
And the shape of the secondary-side iron core 42b is replaced with a C-shape, and E
It may be formed in a letter shape. Further, as described above, the primary winding 41c includes the center tap 41e, and the secondary winding 42c is connected in parallel with the resonance capacitor C3.

Further, the primary side unit 41 opens the surface of the secondary side unit 42, while the secondary side unit 42 opens the surface of the primary side unit 41, and is a box shape made of a metal having high conductivity. Of the casings 41f and 42f. Normally, the magnetic flux induced in the primary iron core 41b passes through the casing 41f and tries to leak in the direction connecting the outside of the casing 41f and the legs of the primary iron core 41b. However, since the casing 41f is formed of a metal having a high conductivity, when the magnetic flux passes through the casing 41f, an eddy current is generated in the casing 41f in a direction that hinders the leakage magnetic flux. Due to the generation of the eddy current, a magnetic flux in the direction opposite to the leakage magnetic flux is induced in the casing 41f, and the magnetic flux leaking to the outside of the casing 41f and the magnetic flux interlinking between the legs of the primary iron core 41b can be reduced. Therefore, the magnetic flux induced in the primary side iron core 41b is efficiently transferred to the secondary side iron core 4 by the casing 41f.
It is possible to interlink with 2b and supply power from the primary side to the secondary side in a good manner.

The second rectifying / smoothing circuit 5 is a circuit for rectifying and smoothing the AC voltage output from the coupling transformer 4 into a DC voltage, and outputting the DC voltage to the LED drive circuit 6. The diode bridge D
B2 and a smoothing capacitor C4 are provided. That is, the output of the coupling transformer 4 is rectified by the diode bridge DB2, smoothed by the capacitor C4, and output to the LED drive circuit 6.

The LED drive circuit 6 is a circuit for controlling the lighting pattern of the LED array 7, and is provided with a voltage holding capacitor C5 for holding the output of the second rectifying and smoothing circuit 5 for a predetermined time. The cathode of a diode D1 that prevents discharge of the capacitor C5 is connected to the positive terminal of C5. The anode of the diode D1 is connected to the positive terminal of the second rectifying / smoothing circuit 5, and the output voltage of the second rectifying / smoothing circuit 5 is charged into the capacitor C5 via the diode D1. In addition, the positive terminal of the capacitor C5 is connected to the input terminal of the constant voltage IC 61 and is held by the capacitor C5.
The output voltage of the rectifying / smoothing circuit 5 is 5 by the constant voltage IC 61.
The voltage is converted into a constant voltage of volts and supplied as a drive voltage to a microcomputer (hereinafter abbreviated as “microcomputer”) 62. Three capacitors C6 to C8 for alleviating transient fluctuations in the voltage output from the capacitor C5 are connected to the input / output terminals of the constant voltage IC 61. The other ends of the capacitors C5 to C8 are connected to the negative terminal of the second rectifying and smoothing circuit 5 together with the ground terminal of the constant voltage IC 61.

On the other hand, the output of the second rectifying / smoothing circuit 5 is connected to the anode of the diode D1 and also to the cathode of the constant voltage diode ZD1 of 20 V, and the anode of the constant voltage diode ZD1 has one end of the resistor R6. The other end of the resistor R6 is connected to the NPN transistor Q3.
Of the resistor R7 and one end of the resistor R7.
The emitter terminal of the transistor Q3 is connected to the negative terminal of the second rectifying and smoothing circuit 5 together with the other end of the resistor R7. The collector terminal of the transistor Q3 has N
The resistor R8 is connected to the base terminal of the PN transistor Q4, and the emitter terminal of the transistor Q4 is connected to the negative terminal of the second rectifying and smoothing circuit 5.
The collector terminal is connected to one end of the resistor R9 and the microcomputer 62.
Is connected to the input terminal In of. The other end of the resistor R9 is
Together with the other end of the resistor R8, it is connected to the positive terminal of the voltage holding capacitor C5.

The microcomputer 62 includes a ROM,
It is a microcomputer in which a RAM and various I / O circuits are built in one chip.
A plurality of drive pattern programs for each LED of the D array 7 are stored. Output terminals Out1 to Ou of this microcomputer 62
t4 is connected to the base terminals of the NPN type transistors Q5 to Q8 via the resistors R10 to R13, respectively, and the emitter terminals of the transistors Q5 to Q8 are the second terminals.
Each is connected to the minus terminal of the rectifying and smoothing circuit 5. Further, resistors R14 to R17 are connected between the base terminals and the emitter terminals of the transistors Q5 to Q8, respectively, and the collector terminals of the transistors Q5 to Q8 are connected to the cathodes of predetermined LED columns of the LED array 7. Has been done. Each time a row signal is input to the input terminal In of the microcomputer 62, the drive pattern of the LED array 7 is changed, and signals corresponding to the changed drive pattern are output from the output terminals Out1 to Out4 and the LED array 7 outputs The lighting pattern is changed. The ground terminal of the microcomputer 62 is connected to the negative terminal of the second rectifying / smoothing circuit 5.

A plurality of LED arrays 7 (for example, 15)
Is provided with a plurality of LED rows in which the LEDs are connected in series. The cathodes of the LED columns are transistors Q5 to Q8 connected to the output terminals Out1 to Out4 of the microcomputer 62.
Are separately connected to the collector terminals of
Further, the anode of each LED row is connected to the positive terminal of the second rectifying and smoothing circuit 5. The number of LED rows and the number of LEDs in each LED row can be changed as appropriate, and the transistors Q5 to Q8 for driving the LED rows are increased or decreased according to the number of LED rows.

Next, the operation of the non-contact power supply device 1 for electric decoration configured as described above will be described. When the power outlet 11 is connected to a commercial power supply (AC power supply), the diode bridge DB1 and the smoothing capacitor C1 of the first rectifying and smoothing circuit 2 work from both ends of the smoothing capacitor C1, that is, from the first rectifying and smoothing circuit 2. DC voltage is output. At the same time, power is supplied to the drive IC 33 of the drive circuit 3 from a DC power source (not shown), and the resistor R is output from the output terminals Out1 and Out2 of the drive IC 33 at a cycle determined by the timing generation capacitor C2 and the series resistance of the resistors R1 to R3.
Switching devices Q1, Q2 via 4 and R5
Are alternately turned on and off. By alternately driving the switching devices Q1 and Q2, an alternating current having a frequency determined by the capacitor C2 and the resistors R1 to R3 flows through the primary winding 41c of the main transformer TR of the coupling transformer 4.

When an alternating current flows in the primary winding 41c of the main transformer TR of the coupling transformer 4, a magnetic flux is linked to the secondary winding 42c, and a voltage is applied to the secondary winding 42c of the main transformer TR. Occur. The capacitance of the resonance capacitor C3 is adjusted in advance so that the frequency of the primary side winding current of the coupling transformer 4 and the resonance frequency of the secondary side are equal to each other. The power supply to the secondary side is optimized.

The voltage supplied from both ends of the resonance capacitor C3 of the coupling transformer 4 is converted into a DC voltage again by the diode bridge DB2 and the capacitor C4 of the second rectifying and smoothing circuit 5, and output from both ends of the capacitor C4. It The DC positive voltage output from the capacitor C4 is supplied to the anode array of the LED array 7 and the constant voltage IC 61 of the LED drive circuit 6, and the constant voltage IC 61 changes the voltage to a voltage (5 V) suitable for the microcomputer 62. The converted voltage is supplied to the microcomputer 62 as a drive voltage.

The microcomputer 62, to which the drive voltage is supplied, selects one of a plurality of pre-programmed LED drive patterns.
From each output terminal Out1 to Out4 based on the pattern
The drive signal of the D array 7 is output. Depending on this drive signal, the transistors Q5 to Q8 are turned on or off, and as a result, each LED of the LED string whose cathode is connected to the turned on transistors Q5 to Q8 is turned on, and conversely, the turned off transistor Q5 is turned on. Each LED of the LED array whose cathode is connected to Q8 is turned off.

Next, a method of switching the lighting pattern of the LED array 7 will be described. The lighting pattern of the LED array 7 is switched each time the push button switch 31 is pressed. The push button switch 31 is a switch that maintains an ON state only while the switch 31 is pressed, and turns OFF when the switch 31 is released.

Specifically, when the push button switch 31 of the drive circuit 3 is pressed (turned on), the resistor R2 is short-circuited while the push button switch 31 is pressed, and the input terminal Rin of the drive IC 33 is connected. The connected resistance value changes. As a result, the oscillation frequency of the drive IC 33 deviates from the resonance frequency determined by the secondary winding 42c of the coupling transformer 4 and the resonance capacitor C3, and the output voltage of the coupling transformer 4 drops.

The oscillation frequency of the drive IC 33 determined by the resistors R1 and R3 and the capacitor C2 when the push button switch 31 is on and the correction switch 32 is off, and
When the push button switch 31 and the correction switch 32 are both turned on, the oscillation frequency of the drive IC 33 determined by the resistor R1 and the capacitor C2 is determined by the secondary winding 42c of the coupling transformer 4 and the resonance capacitor C3. It is set in advance so that it is significantly different from the frequency. Then,
When the push button switch 31 is pressed, the drive I
The oscillation frequency of C33 largely deviates from the resonance frequency determined by the secondary winding 42c and the resonance capacitor C3, and as a result, the output of the coupling transformer 4 becomes substantially zero volt.

When the push button switch 31 is pushed down and the output of the coupling transformer 4 becomes zero volt, the constant voltage diode ZD1 of the LED drive circuit 6 is turned off, the base current of the transistor Q3 stops flowing, and the transistor Q3 does not flow.
3 turns off. When the transistor Q3 turns off, the resistance R
The collector current flowing through the transistor Q3 via 8 flows into the base of the transistor Q4, and the transistor Q4 is turned on. When the transistor Q4 is turned on, the input to the input terminal In of the microcomputer 62 changes from high to low, and the microcomputer 62 switches the LED drive pattern to the next pattern when the signal changes.

After that, when the push button switch 31 is turned off, the output voltage of the coupling transformer 4 returns to the original voltage. Therefore, the constant voltage diode ZD1 which was turned off is turned on again, and the base current is supplied to the transistor Q3. Flowing,
The transistor Q3 is turned on. When the transistor Q3 is turned on, the base current of the transistor Q4 stops flowing, the transistor Q4 is turned off, and the input to the input terminal In of the microcomputer 62 returns from low to high. In this way, each time the push button switch 31 of the drive circuit 3 is pressed, the input to the input terminal In of the microcomputer 62 changes from high to low, so that the microcomputer 62 uses this signal change as an opportunity to drive the LED drive pattern. Can be switched.

Even if the output voltage of the coupling transformer 4 becomes substantially zero by pressing the push button switch 31, the drive voltage of the microcomputer 62 does not immediately drop and the microcomputer 62 continues to operate. That is, even if the output voltage of the coupling transformer 4 becomes substantially zero volt, the LED drive circuit 6
The voltage across the voltage-holding capacitor C5 does not immediately reach zero volt, but maintains a predetermined voltage for a preset time, and supplies this to the constant voltage IC 61. Therefore,
During this period, the constant-voltage IC 61 normally supplies the drive voltage of 5 V to the microcomputer 62, so that the microcomputer 62 continues to operate. If the push button switch 31 is turned off during this time, the output voltage of the coupling transformer 4 returns to the original voltage. Therefore, if the push button switch 31 is turned on within a predetermined time, the microcomputer 62 is driven during that time. The voltage is normally maintained, and the microcomputer 62 continues to operate.

Next, the primary side iron core 41b of the coupling transformer 4
An operation when the thickness of the inclusion 50 such as a window glass or a wall sandwiched between the secondary iron core 42b and the secondary iron core 42b is thin will be described. When the thickness of the inclusion 50 such as a window glass or a wall sandwiched between the primary side iron core 41b and the secondary side iron core 42b is thin, the coupling of the primary side winding 41c and the secondary side winding 42c of the coupling transformer 4 is performed. The coefficient rises and the output voltage of the secondary winding 42c rises abnormally. In such a case, in order to prevent an accident such as a fire, the correction switch 32 of the drive circuit 3 is turned on,
An abnormal rise in the output voltage of the secondary winding 42c is suppressed.

In operation, by turning on the correction switch 32, the resistor R3 is short-circuited and the oscillation frequency of the drive IC 33 becomes high. As a result, the frequency of the alternating current flowing through the main transformer TR also increases. The secondary winding 42c of the main transformer TR, together with the resonance capacitor C3, is set in advance so as to resonate with the oscillation frequency of the drive IC 33. Therefore, when the correction switch 32 is turned on, the drive IC 3 is turned on.
When the oscillating frequency of 3 changes, it deviates from the resonance frequency determined by the secondary winding 42c of the main transformer TR and the resonance capacitor C3, and the secondary winding 42c of the main transformer TR.
The voltage of will never rise abnormally.

The correction switch 3 used here is used.
2 is a switch that is turned on according to the thickness of the inclusion 50 such as a window glass or a wall, so unlike the push button switch 31 described above, the switch is turned on or off even after the operation of the switch is released. A switch that holds the operation state is used.

FIG. 3 is a diagram showing a usage state of the non-contact power supply device 1 for such an illumination. As shown in FIG. 3, the non-contact power supply device 1 for electric decoration is used with a primary unit 41 and a secondary unit 42 opposed to each other, with an intervening object 50 such as a window glass or a wall interposed therebetween. That is, the primary side unit 41 is disposed on the indoor side with the inclusion 50 such as a window glass or a wall interposed therebetween, and the secondary side unit 42 is disposed on the outdoor side so as to face the primary side unit 41. To be done. Therefore,
The LE connected to the secondary side unit 42 by inserting the power outlet 11 into the indoor commercial power source and supplying electric power from the indoor primary side unit 41 to the outdoor secondary side unit 42.
The D array 7 can be turned on outdoors. This LE
The lighting pattern of the D array 7 can be switched by pressing the push button switch 31 of the primary unit 41 arranged in the room. That is, it is possible to switch the lighting pattern of the LED array that is lit outdoors by simply operating from the room without having to go outside. Furthermore,
When the inclusion 50 such as a window glass or a wall is thin, it is possible to prevent the secondary unit 42 from outputting an abnormally high voltage by operating the correction switch 32 from inside the room. Naturally, the locations of the primary-side unit 41 and the secondary-side unit 42 are not limited to indoors and outdoors.

Next, a modification of this embodiment will be described with reference to FIGS. In the non-contact power supply device 1 for illumination of the above embodiment, when the power outlet 11 of the primary side unit 41 is connected to the commercial power source, regardless of whether the secondary side unit 42 having the LED array 7 is connected or not. The drive circuit 3 operates and the exciting current flows through the primary winding 41c of the coupling transformer 4 as a standby current, which constantly consumes constant power. On the other hand, the non-contact power supply devices for illumination 10 and 100 of the second and third embodiments shown in FIGS.
Then, facing the primary unit 41, the secondary unit 4
When 2 is not connected, the primary side unit 41 is configured not to consume power. In addition, the non-contact power supply devices for illumination 10 and 100 of the second and third embodiments.
In the description, the same parts as those of the contactless power supply device 1 for the electric illumination of the first embodiment described above are denoted by the same reference numerals, and the description thereof will be omitted, and only different parts will be described.

FIG. 4A is an external view of the non-contact power supply device 10 for electric decoration of the second embodiment. In the non-contact power supply device 10 for illumination of the second embodiment, a push button switch 65 is arranged on the surface of the primary unit 41 facing the secondary unit 42, and the primary unit 42 is the primary unit. The push button switch 6 is located on the surface facing the side unit 41 and faces the push button switch 65 of the primary side unit 41 when the two units 41 and 42 are arranged to face each other.
A recess 66 that is sufficiently larger than 5 is formed. The push button switch 65 is configured by a switch that maintains an on state only while the switch 65 is pressed and turns off when the press is released. Further, the recess 66 is formed in a size that allows the push button switch 65 to be housed therein while maintaining its off state.

FIG. 4B is a partial circuit diagram of the power outlet 11 and the first rectifying / smoothing circuit 2 of the non-contact power supply device 10 for the electric decoration. The push button switch 65 is arranged between the power outlet 11 and the first rectifying / smoothing circuit 2, and when the push button switch 65 is pressed down in a state where the power outlet 11 is plugged into a commercial power source. As long as the AC voltage from the commercial power supply is the first rectifying and smoothing circuit 2,
And to the drive circuit 3.
That is, when the push button switch 65 is not pressed, the AC voltage from the commercial power source is not supplied to the first rectifying / smoothing circuit 2 and the drive circuit 3 even if the power outlet 11 is plugged into the commercial power source, and the primary side The unit 41 does not consume power.

Therefore, as shown in FIG. 5A, the primary side unit 41 and the secondary side unit 42 of the non-contact power supply device 10 for electric decoration are normally operated via the inclusions 50 such as window glass and walls. , The push button switch 65 is turned on by the inclusion 50, the AC voltage is supplied to the first rectifying and smoothing circuit 2 and the drive circuit 3, and the primary side unit 41 operates. On the other hand, as shown in FIG. 5B, when the primary unit 41 is removed, the push button switch 65 is not turned on, so that no AC voltage is supplied to the first rectifying and smoothing circuit 2 and the drive circuit 3. No power is consumed in the primary unit 41. Also, FIG.
As shown in (c), when the primary side unit 41 and the secondary side unit 42 are directly opposed to each other without the interposition of the inclusion 50, the push button switch 65 is housed in the recess 66. Since it is not turned on, the AC voltage is not supplied to the first rectifying / smoothing circuit 2 and the driving circuit 3 in this case as well,
No power is consumed in the primary unit 41.

When the primary unit 41 operates in the state shown in FIG. 5 (c), the space between the two units 41 and 42 is extremely narrow, so that an abnormally high voltage is induced in the secondary unit 42 and a fire or the like occurs. There is a risk of causing an accident. However, in the non-contact power supply device for illumination 10 of the second embodiment, the operation of the primary side unit 41 is prohibited in such a case (since the primary side unit 41 does not operate), the secondary side unit 42.
An abnormally high voltage will not be induced, and the occurrence of fire etc. can be prevented.

FIG. 6 is an external view of the non-contact power supply device 100 for electric decoration of the third embodiment. In the non-contact power supply device 100 for the illumination of the third embodiment, the reed switch 71 is arranged inside the surface of the primary unit 41 facing the secondary unit 42, and the primary side of the secondary unit 42 is the primary side. The surface facing the unit 41 and having a magnetic force sufficient to turn on the reed switch 71 at a position facing the reed switch 71 of the primary side unit 41 when the two units 41 and 42 are arranged to oppose each other. A magnet 72 is arranged.
The reed switch 71 is a switch that is always off and is turned on by its magnetic force when the permanent magnet 72 approaches. The reed switch 71 once turned on is turned off by being separated from the permanent magnet 72.

The reed switch 71 is arranged electrically in the same position as the push button switch 65 of the non-contact power supply device for illumination 10 of the second embodiment. Therefore, the AC voltage is supplied from the commercial power source to the first rectifying / smoothing circuit 2 and the drive circuit 3 only when the reed switch 71 is turned on while the power outlet 11 is plugged into the commercial power source. Therefore, when the reed switch 71 is off,
Even if the power outlet 11 is plugged into a commercial power source,
The AC voltage from the commercial power source is not supplied to the first rectifying and smoothing circuit 2 and the drive circuit 3, and the primary side unit 41 does not consume power.

As described above, in the non-contact power supply device 100 for the electric decoration of the third embodiment, the primary side unit 4 is arranged only when the primary side unit 41 and the secondary side unit 42 are arranged opposite to each other.
1 is supplied with electric power. That is, when the primary unit 41 and the secondary unit 42 are normally attached via the intervening object 50 such as a window glass or a wall, the magnetic force of the permanent magnet 72 causes the reed switch 71.
Is turned on, an AC voltage is supplied to the first rectifying and smoothing circuit 2 and the drive circuit 3, and the primary side unit 41 operates.
On the other hand, when the secondary unit 42 is removed, the reed switch 71 is not turned on because the magnetic force of the permanent magnet 72 does not act on the reed switch 71. Therefore, in such a case, the AC voltage is not supplied to the first rectifying and smoothing circuit 2 and the drive circuit 3, and the primary side unit 41 does not consume power.

The push button switch 6 of the second embodiment
5 and the recess 66, and the reed switch 71 of the third embodiment.
The permanent magnet 72 and the permanent magnet 72 may be mounted together in one non-contact power supply device for illumination. FIG. 7A is a partial circuit diagram of the power outlet 11 and the first rectifying / smoothing circuit 2 of the non-contact power supply device for illumination 200 in which both the switches 65 and 71 are connected in series and mounted together. As shown in FIG. 7B, the non-contact power supply device 200 for the electric decoration is used when the primary side unit 41 and the secondary side unit 42 are normally arranged so as to face each other with the inclusion 50 interposed therebetween. Only when the primary side unit 41 is turned on and the secondary side unit 42 is removed only by the primary side unit 41 as shown in FIG. 7C, or when the primary side unit 42 is removed as shown in FIG. 7D. 41
When the secondary unit 42 and the secondary unit 42 are directly opposed to each other without the inclusion 50, the primary unit 41 is turned off. Therefore, in the case where only the primary side unit 41 is provided or when both units 41 and 42 are provided,
When the units 1 and 42 are directly opposed to each other, the primary-side unit 41 is not turned on, which prevents unnecessary power consumption of the primary-side unit 41 and generation of an abnormally high voltage of the secondary-side unit 42. be able to.

The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. Is easily guessed.

For example, in the present embodiment, the non-contact power supply device for lighting 1, 10, for controlling the lighting of the lighting of the LED array 7 or the like.
Although 100 and 200 are used for the description, the non-contact power supply device for control of the present invention is not necessarily used only for the control of the electric decoration, and can naturally be used for the control of other objects. is there.

Further, the push button switch 31 is arranged in parallel with the timing generating resistor R2 of the drive circuit 3,
When the switch 31 is pressed, the resistance value connected to the input terminal Rin of the drive IC 33 is changed to drive the drive IC 33.
The oscillation frequency is changed to reduce the voltage generated in the secondary winding 42c, and as a result, the lighting pattern of the LED array 7 is switched. However, the push button switch 31 is connected to the center tap 41e of the primary winding 41c and the capacitor C.
It is provided between the positive terminal of No. 1 or between the diode bridge DB1 and the power outlet 11 to turn on the switch 31 to momentarily cut off the power supply to the primary winding 41c. Then, due to the interruption, the electromagnetic induction to the secondary winding 42c may be stopped and the lighting pattern of the LED array 7 may be switched.

[0060]

According to the non-contact power supply device for control of the first aspect, since the control circuit of the secondary unit can be operated from the primary unit of the coupling transformer, the operator can operate the secondary side. There is an effect that an object connected to the unit can be operated from the primary unit without wrapping around at the installation position of the secondary unit. For example,
When the primary unit is installed indoors and the secondary unit is installed outdoors, the operator must operate the object connected to the outdoor secondary unit indoors without going out. You can The effect is great in the winter season when it is difficult to go outdoors.

According to the non-contact power supply device for control of the second aspect, in addition to the effect exhibited by the non-contact power supply device for control of the first aspect, the control circuit is controlled by operating the operation circuit of the primary unit. The lighting pattern of the electric decoration is switched based on a predetermined signal output from the signal output circuit of the secondary unit. Therefore, there is an effect that the lighting pattern of the electric decoration connected to the secondary unit can be operated and switched from the primary unit.

According to the control non-contact power supply device of claim 3, in addition to the effect of the control non-contact power supply device of claim 1 or 2, the alternating current input to the primary unit is , Is rectified and smoothed by the first rectifying and smoothing circuit and converted into a direct current, and then converted into an alternating current by the drive circuit and flows into the primary winding. Due to the electromagnetic induction of the alternating current flowing through the primary winding, an alternating current flows through the secondary winding of the secondary unit, and a DC voltage is output from the second rectifying / smoothing circuit based on the alternating current. Therefore, the operation circuit stops the oscillation of the drive circuit or changes its oscillation frequency to stop the alternating current flowing in the primary winding or change its frequency to output the second rectifying and smoothing circuit. It is possible to output a predetermined signal from the signal output circuit to the control circuit by setting the voltage below the predetermined voltage. Thus, there is an effect that a predetermined signal can be output to the separated control circuit of the secondary side unit by operating the operation circuit of the primary side unit.

According to the control non-contact power supply device of claim 4, in addition to the effect of the control non-contact power supply device of any of claims 1 to 3, the oscillation frequency of the primary unit and the secondary A resonance circuit is connected to the secondary winding of the secondary unit so that the resonance frequency of the side unit becomes equal. Therefore, there is an effect that the impedance of the secondary winding can be reduced to facilitate the flow of current to the secondary winding, and the power supply from the primary unit to the secondary unit can be optimized.

According to the non-contact power supply device for control of the fifth aspect of the present invention, in the effect brought about by the non-contact power supply device for control of the fourth aspect, when the disposition interval between the primary side unit and the secondary side unit is small. The frequency correction circuit removes the oscillation frequency of the primary unit from the resonance frequency of the secondary unit. Generally, when the distance between the primary winding and the secondary winding of the coupling transformer is small, the coupling coefficient of both windings rises, and the output voltage of the secondary winding rises abnormally. However, as described above, in such a case, the frequency correction circuit removes the oscillation frequency of the primary side unit from the resonance frequency of the secondary side unit, preventing an abnormal increase in the output voltage of the secondary side winding. There is an effect that can be done.
This can prevent accidents such as a fire. Further, since the frequency correction circuit is provided in the primary side unit, there is an effect that such an operation can be performed from the primary side unit.

According to the non-contact power supply device for control of the sixth aspect, in addition to the effect of the non-contact power supply device for control of the fourth or fifth aspect, the alternating current input to the primary unit is temporarily It is rectified and smoothed by the first rectifying and smoothing circuit and converted into a direct current, and then converted into an alternating current by the drive circuit and flows into the primary winding. Due to the electromagnetic induction of the alternating current flowing in the primary winding, an alternating current flows in the secondary winding of the secondary unit, and a voltage is generated in the secondary winding. In this way, the oscillation frequency of the primary side unit is determined by the oscillation frequency of the drive circuit, but since the frequency correction circuit changes the oscillation frequency of the drive circuit, the primary side unit is operated to change the oscillation frequency of the primary side unit. There is an effect that the oscillation frequency can be removed from the resonance frequency of the secondary unit.

According to the non-contact power supply device for control of the seventh aspect, in addition to the effect of the non-contact power supply device for control according to any one of the first to sixth aspects, the secondary side unit can be installed. Accordingly, there is provided a changeover switch for switching the power supply to the primary unit between supply and disconnection. Therefore,
Power is supplied to the primary unit when the secondary unit is properly arranged with respect to the primary unit, and conversely, power is supplied to the primary unit when it is not properly arranged. There is an effect that the power supply device can be properly operated by turning off the power supply.

According to the non-contact power supply device for control of the eighth aspect, in addition to the effect of the non-contact power supply device for control of the seventh aspect, the changeover switch is arranged such that the secondary side unit faces the primary side unit. If not, the power supply to the primary unit is cut off. Therefore, when the secondary unit is removed, even if the power outlet of the primary unit is plugged into the commercial power supply, the power supply to the primary unit is cut off and the power consumption of the primary unit is reduced. There is an effect that can suppress.

According to the non-contact power supply device for control of the ninth aspect, in addition to the effect of the non-contact power supply device for control of the seventh or eighth aspect, the changeover switch includes the primary side unit and the secondary side unit. The power supply to the primary unit is cut off when and are directly opposed to each other without an intervening substance. Therefore, if the primary side unit and the secondary side unit are directly opposed to each other and the space between the primary side winding and the secondary side winding is minimal, the power supply to the primary side unit is cut off. As a result, it is possible to prevent an abnormal increase in the output voltage of the secondary winding.

According to the non-contact power supply device for control of a tenth aspect, in addition to the effect exhibited by the non-contact power supply device for control according to any one of the first to ninth aspects, a primary side core and a secondary side iron core are provided. Side shape is C with the secondary core of the secondary unit
It is formed in a V shape, and its C-shaped end faces are arranged and used so as to face each other. Therefore, there is an effect that the magnetic flux can be efficiently linked from the primary side iron core to the secondary side iron core, and the electric power can be efficiently supplied to the secondary side unit.

According to the non-contact power supply device for control of the eleventh aspect, in addition to the effect of the non-contact power supply device for control according to any one of the first to tenth aspects, the primary side unit is made of metal having high conductivity. The casing other than the surface facing the secondary unit is covered by the casing formed by. Normal,
The magnetic flux induced in the primary iron core passes through the casing and tries to leak in the direction connecting the outside of the casing and the legs of the primary iron core. However, since the casing is made of a metal having a high conductivity, when the magnetic flux passes through the casing, an eddy current is generated in the casing in a direction in which the leakage magnetic flux is obstructed. Due to the generation of the eddy current, a magnetic flux in the direction opposite to the leakage magnetic flux is induced in the casing, and the magnetic flux leaking to the outside of the casing and the magnetic flux interlinking between the legs of the primary side iron core can be reduced. Therefore, there is an effect that the magnetic flux induced in the primary side core is efficiently linked to the secondary side core by the casing, and the electric power can be satisfactorily supplied from the primary side unit to the secondary side unit.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a non-contact power supply device for electric decoration, which is an embodiment of the present invention.

FIG. 2 is a side sectional view of a coupling transformer.

FIG. 3 is a diagram showing a usage state of a non-contact power supply device for illumination.

FIG. 4A is an external view of a non-contact power supply device for illumination of a second embodiment, and FIG. 4B is a power outlet of the non-contact power supply device for illumination and a first rectifying / smoothing circuit. It is a partial circuit diagram.

5 (a) to 5 (c) are views showing a usage state of the non-contact power supply device for electric decoration of the second embodiment.

FIG. 6 is an external view of a non-contact power supply device for lighting according to a third embodiment.

FIG. 7 (a) is a partial circuit diagram of a power outlet and a first rectifying / smoothing circuit of a non-contact power supply device for illumination of a fourth embodiment, and FIGS. It is the figure which showed the use condition of the decoration non-contact power supply device.

[Explanation of symbols]

1, 10, 100, 200 Non-contact power supply device for decoration (non-contact power supply device for control) 2 First rectifying / smoothing circuit 3 Drive circuit 4 Coupling transformer 5 Second rectifying / smoothing circuit 31 Push button switch (operation circuit) 32 Correction Switch (frequency correction circuit) 41 primary side unit 41b primary side iron core 41c primary side winding 41f casing 42 secondary side unit 42b secondary side iron core 42c secondary side winding 42f casing 61 constant voltage IC (constant voltage output circuit) 62 Microcomputer (Control Circuit) 65 Push Button Switch (Changeover Switch) 71 Reed Switch (Changeover Switch) C3 Resonance Capacitor (Part of Resonance Circuit) C5 Voltage Holding Capacitor (Voltage Holding Circuit)
(Part of signal output circuit) Q3, Q4 transistors (part of signal output circuit) R6 to R9 resistors (part of signal output circuit) ZD1 constant voltage diode (part of signal output circuit)

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04Q 9/00 311 H04Q 9/00 311S H05B 37/02 H05B 37/02 H (72) Inventor Masumi Osumi Kasugai, Aichi Prefecture 1 Aichi-cho, Aichi, Japan Aichi Electric Co., Ltd. (72) Inventor Hiroshi Takeuchi 1280 Kawanakajima-machihara, Nagano, Nagano Nagano Aichi Electric Co., Ltd. (72) Hirokazu Ishizaka 1280, Nakanaka-machi, Nagano, Nagano 1280 Address Nagano Aichi Electric Co., Ltd. (72) Inventor Takashi Hasegawa 1280 Kawanakajimachohara, Nagano City, Nagano Nagano Aichi Electric Co., Ltd. F term (reference) 3K073 AA62 AA75 AB03 CA01 CB02 CC07 CE06 CJ13 CJ17 CL00 5H006 CA07 CA12 CA13 CB01 CB09 CC01 CC08 DA04 DB01 DB07 DC05 GA01 GA04 HA05 HA09 5K048 AA04 BA07 DA01 DC06 EA21 EB02 HA04 HA06 HA11

Claims (11)

[Claims] 1. A primary side unit and a secondary side unit have a coupling transformer which is used separately, and electric power is supplied from the primary side unit of the coupling transformer to the secondary side unit in a non-contact manner by electromagnetic induction. In the non-contact power supply device for control, the secondary side unit rectifies and smoothes an alternating current flowing in a secondary winding based on an alternating current flowing in a primary winding of the primary unit, and outputs a direct current voltage. A second rectifying and smoothing circuit, a voltage holding circuit that holds the output voltage of the second rectifying and smoothing circuit, a constant voltage output circuit that outputs a stable constant voltage based on the output voltage of the voltage holding circuit, and a constant voltage output circuit that outputs the constant voltage. A control circuit driven by a constant voltage output from the voltage output circuit, and a signal output circuit for outputting a predetermined signal to the control circuit when the output voltage of the second rectifying and smoothing circuit becomes less than a predetermined voltage. The primary side unit, in order to output a predetermined signal from the signal output circuit to the control circuit, to stop the alternating current flowing in the primary winding or change the frequency of the alternating current. A non-contact power supply device for control, comprising: an operation circuit for setting an output voltage of the second rectifying / smoothing circuit of the secondary unit to be less than a predetermined voltage. 2. The control circuit stores a plurality of lighting patterns of a plurality of electric decorations, and based on a predetermined signal output from the signal output circuit by operating an operation circuit of the primary side unit, The non-contact power supply device for control according to claim 1, wherein a lighting pattern of an electric decoration that stores a plurality of patterns is switched. 3. The primary side unit rectifies and smoothes an alternating current to output a direct current, and a first rectifying and smoothing circuit, and the direct current output from the first rectifying and smoothing circuit as an alternating current. A drive circuit that oscillates to flow in the winding, wherein the operation circuit stops the oscillation of the drive circuit or changes its oscillation frequency to stop the alternating current flowing in the primary winding, or 3. The frequency of the alternating current is changed so that the output voltage of the second rectifying / smoothing circuit of the secondary side unit is less than a predetermined voltage.
The non-contact power supply device for control according to. 4. A resonance circuit is connected to the secondary winding of the secondary unit so that the oscillation frequency of the primary unit and the resonance frequency of the secondary unit are equal. The non-contact power supply device for control according to any one of claims 1 to 3, which is characterized in that. 5. A frequency correction circuit for causing the oscillation frequency of the primary unit to deviate from the resonance frequency of the secondary unit when the interval between the primary unit and the secondary unit is small. The non-contact power supply device for control according to claim 4, wherein the non-contact power supply device is provided in the primary unit. 6. The primary side unit rectifies and smoothes an alternating current to output a direct current, and a first rectifying and smoothing circuit, and the direct current output from the first rectifying and smoothing circuit as an alternating current. A drive circuit that oscillates to flow to the winding, and the frequency correction circuit changes the oscillation frequency of the drive circuit so that the oscillation frequency of the primary unit deviates from the resonance frequency of the secondary unit. The non-contact power supply device for control according to claim 4 or 5, characterized in that 7. The switch according to claim 1, further comprising a changeover switch for switching between power supply and disconnection of power supply to the primary unit according to an arrangement state of the secondary unit. 6. The non-contact power supply device for control according to any one of 6. 8. The change-over switch cuts off power supply to the primary side unit when the secondary side unit is not arranged to face the primary side unit. The contactless power supply for control described. 9. The changeover switch cuts off power supply to the primary side unit when the primary side unit and the secondary side unit are directly opposed to each other without an intervening member. The non-contact power supply device for control according to claim 7 or 8, which is characterized by being present. 10. The primary side core of the primary side unit and the secondary side core of the secondary side unit are formed to have a C-shaped side surface, and the C-shaped end surfaces are arranged to face each other. It is used as the following.
9. The non-contact power supply device for control according to any one of 1 to 9. 11. The primary side unit includes a casing formed of a metal having a high electrical conductivity, which covers a surface other than a surface facing the secondary side unit, according to any one of claims 1 to 10. The non-contact power supply device for control according to.