TW201403988A - Contactless power supply system - Google Patents

Abstract

The power supply device of the contactless power supply system in the present invention includes several primary magnetic cores (11) and several primary coils (L1), said several primary magnetic cores (11) are arranged at a definite distance along an orientation. In a mobile body (1) movable in the orientation is disposed a power receiving device (20), which includes a long-striped secondary magnetic core (21), extending along the orientation, and a secondary coil (L2). The primary magnetic cores (11) and the secondary magnetic core (21) are arranged such that D ≥ 2X1 and X2 ≥ 2X1 + D are satisfied. Thereby, X1 represents the size of each primary magnetic core (11) in the orientation, X2 represents the length of the secondary magnetic core (21) in the orientation, and D represents the distance of the primary magnetic core (11).

Description

Contactless power supply system

The present invention relates to a contactless power supply system.

In the past, a non-contact power supply system using an electromagnetic induction method includes: a power supply device including a plurality of primary coils arranged in one direction; and a power receiving device including a secondary coil on a plurality of primary coils (for example, a patent) Document 1). In the non-contact power supply system, the secondary coil generates two powers by electromagnetic induction between the primary coil that generates the alternating magnetic field and the secondary coil that faces the primary coil. In the case where the power supply object is a moving body, since the electric wires that hinder the movement of the moving body can be omitted, the non-contact power supply has a great advantage.

[prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2011-211874

However, in Patent Document 1, since both the primary coil and the secondary coil are planar coils, the power supply surface and the power receiving surface are wide. When the power supply surface and the power receiving surface of the planar primary coil and the secondary coil are reduced, the coil cannot be wound into a desired number of windings. Therefore, the primary coil is formed into a primary coil and 2 Secondary coil. However, when the primary coil and the secondary coil are formed of a thin wire, the coil is likely to generate heat.

Further, in Patent Document 1, since the configuration of a plurality of primary coils is arranged in a row without gaps, the number of primary coils is large, and a high-frequency inverter that supplies a high-frequency current of the primary coil is generated. (Inverter) only needs the number of coils once.

The present invention has been made to solve the above problems, and an object thereof is to provide a non-contact power supply system capable of reducing the number of primary coils, and thereby reducing the number of high frequency inverters and achieving cost reduction.

A contactless power supply system according to an aspect of the present invention includes: a power supply device including: a plurality of primary side magnetic cores arranged at regular intervals along an arrangement direction; and respectively wound around the plurality of primary side magnetic bodies a plurality of primary coils of the core; and the moving body move in the aforementioned alignment direction. The mobile device is provided with a power receiving device including a long secondary magnetic core extending in the array direction and a secondary coil wound around the secondary magnetic core. The moving body is configured such that when the moving body moves in the arrangement direction, the secondary magnetic core moves along the plurality of primary coils, and the secondary power generated by the power receiving device is supplied to the aforementioned The electrical machine of the moving body. The plurality of primary side cores and the secondary side cores are arranged and formed to satisfy D≧2X1 and X2≧2X1+D, where X1 represents the size of each primary core in the arrangement direction, X2 represents the length of the secondary side core in the array direction, and D represents the interval of the primary side core.

Preferably, the secondary magnetic core is a C-type or an I-shaped core.

Preferably, the power supply device includes a plurality of high frequency inverters that supply high frequency currents to the plurality of primary coils.

Preferably, the plurality of primary coils and the secondary coils are connected in series or in parallel with a capacitor for resonance.

Preferably, the moving body includes the storage space for the electric device.

Preferably, the moving system is movably supported by the rails, and the plurality of primary side magnetic cores are disposed on the rails, and the primary magnetic cores are arranged regardless of the position of the moving body relative to the rails. The size, the length of the secondary magnetic core, and the interval between the primary magnetic cores are set such that one or two of the secondary magnetic core and the plurality of primary magnetic cores Relative.

Preferably, the power supply device is provided in a door lintel of the room, the plurality of primary side magnetic cores are arranged along the door cross beam, and the moving body is a sliding door, the second time The side magnetic core is disposed at an upper portion of the sliding door, and when the sliding door moves along the door cross beam, the secondary magnetic core faces at least one of the plurality of primary magnetic cores.

According to the present invention, the number of coils can be reduced once, and accordingly, the number of high-frequency inverters can be reduced to achieve cost reduction.

1‧‧‧Sliding door, moving body

1a‧‧‧Storage space

2‧‧‧ Doors

3‧‧‧ threshold

10‧‧‧Power supply unit

11‧‧1 times side core

11a, 21a‧‧‧ both sides

11b, 21b‧‧‧ middle part

11c, 21c‧‧‧ front face

15‧‧‧High frequency inverter

16, 25‧‧‧ Full-wave rectifier circuit

20‧‧‧Power-receiving device

21, 31‧‧‧2 times side core

21a‧‧‧ both sides

21b‧‧‧Intermediate

21c‧‧‧ front face

26‧‧‧Voltage stabilization circuit

C1‧‧‧1st charge and discharge capacitor

C2‧‧‧2nd charge and discharge capacitor

Cr1‧‧1st side resonance capacitor

Cr2‧‧‧2 secondary resonance capacitor

Cs1‧‧‧1 side smoothing capacitor

D‧‧‧ interval

D1, D2‧‧‧ diode

E‧‧‧Electrical machines

G‧‧‧Commercial power supply

K‧‧‧ combination coefficient

L1‧‧1 times coil

L2‧‧2nd coil

Lx‧‧‧ feedback coil

Lo, Ls‧‧‧Inductors

N‧‧‧ connection point

P1‧‧‧ positive terminal

P2‧‧‧ negative terminal

Q1‧‧‧MOS transistor

Q2‧‧‧Bipolar transistor

R1‧‧‧1st resistor

R2‧‧‧2nd resistor

R3‧‧‧3rd resistor

R4‧‧‧4th resistor

R5‧‧‧5th resistor

Vd‧‧‧ DC voltage

X1‧‧‧ thickness

X2‧‧‧ length

1 is a perspective view of a contactless power supply system of an embodiment.

Fig. 2 is a perspective view showing a primary coil and a secondary coil of the non-contact power supply system of the embodiment.

3(a) to (j) are diagrams for explaining the coupling coefficient corresponding to the position of the secondary coil with respect to the primary coil.

Figure 4 is an electrical block circuit diagram of a contactless power supply system.

Figure 5 is an electrical circuit diagram of a high frequency inverter.

Fig. 6 is a perspective view showing a primary coil and a secondary coil of a non-contact power supply system of another example.

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

As shown in FIG. 2, according to one aspect of the present invention, a contactless power supply system includes a power supply device and a mobile body; the power supply device includes a plurality of primary side magnetic cores 11 arranged at a certain interval D along an arrangement direction, and a plurality of primary coils L1 wound around the plurality of primary magnetic cores 11; the moving system moves in the alignment direction; and the movable body is provided with a power receiving device including elongated strips extending in the arrangement direction The secondary magnetic core 21 and the secondary coil L2 wound around the secondary magnetic core 21. The plurality of primary side cores 11 and second side cores 21 are arranged and formed to satisfy D≧2X1 and X2≧2X1+D. Here, X1 indicates the size of each primary core 11 in the array direction, X2 indicates the length of the secondary core 21 in the array direction, and D indicates the interval between the primary cores 11. According to this configuration, the power receiving device 20 can sufficiently obtain the secondary power regardless of the position of the movable body 1, and can reduce the number of primary coils L1.

In the example shown in Fig. 1, the moving body is the sliding door 1. The sliding door 1 is arranged between the door lintel 2 and the sill 3 of the room, at the door lintel 2 and the sill 3 The formed groove is slidably slidably supported by a position shown by a solid line in Fig. 1 and a position where the door cross member 2 is a position shown by a two-dot chain line.

A power supply device 10 is disposed in the door cross member 2. The power supply device 10 has a plurality of primary coils L1 wound around a plurality of primary magnetic cores 11. The primary coils L1 are arranged along the grooves of the door lintel 2 at predetermined intervals.

In the example shown in FIG. 2, the primary side core 11 is a so-called C-core, and the primary coil L1 is wound around the intermediate portion 11b of the C-type primary side core 11.

The primary coil L1 and the primary core 11 are attached to the groove of the door lintel 2, and are arranged at equal intervals along the moving direction of the sliding door 1 indicated by an arrow in FIG. The primary side core 11 is disposed such that the square front end surface 11c faces the upper surface of the sliding door 1, and the line connecting the both side portions 11a is orthogonal to the moving direction of the sliding door 1.

The interval D between the primary side cores 11 is set such that the size of the primary side core 11 in the moving direction of the sliding door 1 is twice or more the thickness X1 (D≧2X1).

The power supply device 10 includes a plurality of high frequency inverters 15 (see FIG. 4) that are respectively connected to the primary coil L1 and supply a high frequency current to the corresponding primary coil.

The sliding door 1 is formed into a rectangular plate shape having a thickness of 40 mm, for example, made of wood, glass, plastic, or a wall material. A power receiving device 20 is provided in the sliding door 1. The power receiving device 20 has a rectangular second-order magnetic core 21 and a secondary coil L2 wound around the secondary magnetic core 21. The secondary magnetic core 21 has a long shape and faces the moving direction of the sliding door 1. extend.

In the example shown in FIG. 2, the secondary magnetic core 21 is formed of the same material as the primary magnetic core 11, and has a C-shaped core having the same cross-sectional shape as that of the primary magnetic core 11 of the primary side. The length X2 of the secondary side core 21 is set to be larger than the size X1 of the primary side core 11.

The secondary side magnetic core 21 is attached to the upper portion of the sliding door 1 which is fitted in the groove of the door lintel 2, and is disposed along the moving direction. The secondary magnetic core 21 includes two C-shaped side portions 21a and two rectangular distal end faces 21c extending in the moving direction between the both side portions 21a. The front end faces 21c are opposed to the front end faces 11c of the primary side core 11 respectively.

The secondary coil L2 is wound around the intermediate portion 21b of the secondary side core 21. When the high-frequency current is supplied to the primary coil L1, secondary electric power is generated in the secondary coil L2 by electromagnetic induction from the alternating magnetic field generated by the primary magnetic core 11.

The arrangement of the primary side core 11 and the secondary side core 21 will be described.

As shown in Fig. 2, X1 indicates the size of each primary core 11 in the moving direction of the sliding door 1, D indicates the interval between the primary cores 11, and X2 indicates the length of the secondary core 21. The primary side core 11 and the secondary side core 21 are arranged to satisfy D≧2X1 and X2≧2X1+D.

When this condition is satisfied, the coupling coefficient K of the secondary coil L2 and the primary coil L1 opposed at that time is 0.15 or more regardless of whether the sliding door 1 is at any moving position.

The coupling coefficient K of 0.15 or more is based on the high-frequency current supplied from the high-frequency inverter 15 of the power supply device 10 to the primary coil L1, and the alternating magnetic field generated by the primary coil L1 can transmit electric power to the secondary movement twice. line The coupling coefficient K of the circle L2.

3(a) to (j) show an embodiment in which the coupling coefficient K is 0.15 or more.

For ease of explanation, only three primary side cores 11 and second side cores 21 are shown. The dimension X1 of each primary core 11 in the moving direction is 30 mm, the interval D of the primary core 11 is 60 mm, and the length X2 of the secondary core 21 is 120 mm.

The secondary side core 21 is moved to the right from the position shown in Fig. 3 (a) to the position shown in Fig. 3 (j). At the position shown in Fig. 3 (a), the secondary side core 21 is directed to the primary side core 11 located on the left side and the center. In the state shown in FIG. 3(j), the secondary side core 21 is directed to the primary side core 11 located at the center and the right side. The coupling coefficient K of the primary coil L1 and the secondary coil L2 is calculated at each position of FIGS. 3(a) to 3(j).

The coupling coefficient K is obtained by calculating the inductance L of the secondary coil L2 when the primary coil L1 is opened and the inductance Ls of the secondary coil L2 when the primary coil L1 is short-circuited, and calculating the respective positions of the secondary coil L2 according to the following equation.

The rate of change (%) of the coupling coefficient K is calculated from the following equation: the coupling coefficient K at the time when the secondary coil L2 is located in FIG. 3(a), that is, the reference coupling coefficient Ks, and the coupling coefficient Km of the secondary coil L2 at each position. .

[Math 2] Change rate [%]={1-(Km/Ks)}×100

Fig. 3(a) shows the state in which the secondary side core 21 is facing the primary side core 11 on the left side and the center. At this time, the left end of the secondary magnetic core 21 and the left end of the primary magnetic core 11 on the left side, and the right end of the secondary magnetic core 21 and the right end of the primary primary core 11 in the center are aligned. At this time, the binding coefficient K was 0.196.

Fig. 3 (b) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 10 mm from the position shown in Fig. 3 (a) to the right. At this time, the coupling coefficient K was 0.185. The rate of change (%) K for the binding coefficient was 5.6%.

Fig. 3 (c) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 20 mm from the position shown in Fig. 3 (a) to the right. At this time, the coupling coefficient K was 0.169. Moreover, the rate of change (%) of the binding coefficient K was 13.8%.

Fig. 3(d) shows the arrangement of the secondary side core 21 from Fig. 3(a) The position shown is shifted to the right by a position of 30 mm. At this time, the coupling coefficient K was 0.16. The rate of change (%) of the binding coefficient K was 18.4%.

Fig. 3 (e) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 40 mm from the position shown in Fig. 3 (a) to the right. At this time, the coupling coefficient K was 0.157. The rate of change (%) of the binding coefficient K was 19.9%.

Fig. 3 (f) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 50 mm from the position shown in Fig. 3 (a) to the right. At this time, the coupling coefficient K was 0.157. The rate of change (%) of the binding coefficient K was 19.9%.

Fig. 3 (g) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 60 mm from the position shown in Fig. 3 (a) to the right. At this time, the coupling coefficient K was 0.16. The rate of change (%) of the binding coefficient K was 18.4%.

Fig. 3 (h) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 70 mm from the position shown in Fig. 3 (a) to the right. At this time, the coupling coefficient K was 0.174. The rate of change (%) of the binding coefficient K was 11.2%.

Fig. 3 (i) shows a state in which the secondary magnetic core 21 is placed at a position shifted from the position shown in Fig. 3 (a) by 80 mm to the right. At this time, the coupling coefficient K was 0.187. The rate of change (%) of the binding coefficient K was 4.6%.

Fig. 3 (j) shows a state in which the secondary magnetic core 21 is placed at a position shifted by 90 mm from the position shown in Fig. 3 (a) to the right. In other words, the left end of the secondary magnetic core 21 and the left end of the primary primary core 11 and the right end of the secondary core 21 and the right end of the primary core 11 on the right side are identical to each other. At this time, the binding coefficient K was 0.196. The rate of change (%) of the binding coefficient K was 0.0%.

According to the above, the position of the side core 21 is not limited, that is, the sliding door In the position of 1, the coupling coefficient K of the secondary coil L2 and the primary coil L1 is 0.15 or more. Therefore, regardless of whether the sliding door 1 is at any position, the secondary coil L2 can receive electric power twice by the alternating magnetic field generated by the primary coil L1.

Further, in the movement range of FIGS. 3(a) to 3(j), since the rate of change of the coupling coefficient K is less than 20%, the fluctuation of the secondary power received by the secondary coil L2 is small.

The sliding door 1 is formed with a housing space 1a in which the electric device E can be installed. In the example shown in Fig. 1, the sliding door 1 is provided with two upper and lower storage spaces 1a. The storage space 1a is provided with an electric device E such as a thin television or an electric fan. For example, various electric devices E such as a lighting fixture including a digital photo frame, an LED, or an organic EL, and a mobile terminal can be installed in the storage space 1a.

The electric device E installed in the storage space 1a is driven or charged by the secondary electric power received from the power supply device 10 by the secondary coil L2 of the power receiving device 20.

The power configuration of the power supply device 10 and the power receiving device 20 will be described.

(Power supply device 10)

As shown in FIG. 4, the power supply device 10 includes a high frequency inverter 15 provided in each primary coil L1. Each of the high frequency inverters 15 converts electric power from the commercial power source G into a high frequency current, and supplies the high frequency current to the corresponding primary coil L1.

FIG. 5 shows the electrical circuit of the high frequency inverter 15. The high-frequency inverter 15 is a frequency converter that rectifies the commercial power source G by the full-wave rectifier circuit 16 and uses the rectified DC voltage Vd as a drive source to cause the high-frequency current to flow to the primary coil L1 for excitation. . High frequency frequency conversion of this embodiment The device 15 is composed of a self-excited one-voltage resonance type inverter.

The high frequency inverter 15 has a primary side smoothing capacitor Cs1 connected between the positive terminal P1 and the negative terminal P2 of the full-wave rectifier circuit 16, and smoothes the DC voltage Vd from the full-wave rectifier circuit 16. Further, the high frequency inverter 15 has a series circuit in which the first resistor R1 and the first charge and discharge capacitor C1 are connected in series, and the series circuit is connected in parallel to the primary side smoothing capacitor Cs1.

When the DC voltage Vd from the full-wave rectifying circuit 16 is input, the DC voltage Vd is smoothed by the primary side smoothing capacitor Cs1. The smoothed DC voltage Vd charges the first charge and discharge capacitor C1 through the first resistor R1.

The high frequency inverter 15 has a primary side resonance capacitor Cr1 connected in parallel to the primary coil L1. The primary side resonance capacitor Cr1 constitutes a primary coil L1 and an LC resonance circuit.

The positive terminal side of the parallel circuit of the primary coil L1 and the primary side resonance capacitor Cr1 is connected to the positive terminal P1 of the full-wave rectifier circuit 16. Further, on the negative terminal side of the parallel circuit of the primary coil L1 and the primary side resonance capacitor Cr1, a parallel circuit connected in parallel with the diode D1 and the second resistor R2 is connected in series.

The diode D1 includes an anode terminal connected to the primary coil L1 and a cathode terminal connected to the 汲 terminal of the N-channel MOS transistor (referred to as MOS transistor) Q1.

A diode D2 is connected between the source terminal and the NMOS terminal of the MOS transistor Q1. The source terminal of MOS transistor Q1 passes through the third resistor R3 is connected to the negative terminal P2 of the full-wave rectifier circuit 16. A series circuit in which a feedback coil Lx and a fourth resistor R4 are connected in series is connected between a gate terminal of the MOS transistor Q1 and a connection point between the first resistor R1 and the first charge and discharge capacitor C1. The feedback coil Lx forms a coil of the primary coil L1 and the resonant transformer.

When the charging voltage of the first charging and discharging capacitor C1 is boosted to the ON threshold voltage of the MOS transistor Q1, the MOS transistor Q1 is turned on. When the fourth resistor R4 side of the feedback coil Lx senses positive starting power, the MOS transistor Q1 is turned on. Further, according to the turning-on of the MOS transistor Q1, the primary coil L1 is energized.

The gate terminal of the MOS transistor Q1 is connected to the negative terminal P2 of the full-wave rectifier circuit 16 through the bipolar transistor Q2. In detail, the collector terminal of the bipolar transistor Q2 is connected to the gate terminal of the MOS transistor Q1, and the emitter terminal of the bipolar transistor Q2 is connected to the negative terminal P2 of the full-wave rectifier circuit 16.

The base terminal of the bipolar transistor Q2 is connected to the junction of the source terminal of the MOS transistor Q1 and the third resistor R3 through the fifth resistor R5. The base terminal of the bipolar transistor Q2 is connected to the negative terminal P2 of the full-wave rectifying circuit 16 through the second charging and discharging capacitor C2.

When the MOS transistor Q1 is turned on and the primary coil L1 is energized, and the charging voltage of the second charging/discharging capacitor C2 is boosted to the ON threshold voltage of the bipolar transistor Q2, the bipolar transistor Q2 is turned on. According to the turning-on of the bipolar transistor Q2, the gate-to-source voltage of the MOS transistor Q1 is lowered to be lower than the turn-on threshold voltage, and the MOS transistor Q1 is turned off.

The operation of the high frequency inverter 15 will be described.

When the DC voltage Vd is output from the full-wave rectifier circuit 16, the DC voltage Vd is smoothed by the primary side smoothing capacitor Cs1, and the first charge and discharge capacitor C1 is charged and applied to the primary coil L1 and the primary side. A resonant circuit composed of a resonant capacitor Cr1.

The charging voltage of the first charging/discharging capacitor C1 is applied to the gate terminal of the MOS transistor Q1 through the feedback coil Lx and the fourth resistor R4. When the charging voltage of the first charging and discharging capacitor C1 reaches the threshold voltage of the MOS transistor Q1, the MOS transistor Q1 is turned on. According to the turn-on of the MOS transistor Q1, current flows to the primary coil L1.

As a result, a current flows to the third resistor R3, and the second charge and discharge capacitor C2 is charged, and the base voltage of the bipolar transistor Q2 rises. When the charging voltage of the second charging and discharging capacitor C2 rises and the bipolar transistor Q2 is turned on, the MOS transistor Q1 is turned off.

When the MOS transistor Q1 is turned off, the excitation energy of the primary coil L1 starts to move toward the primary side resonance capacitor Cr1 to start resonance (oscillation), and a resonance voltage is generated in the resonance circuit. In other words, the excitation energy of the primary coil L1 moves toward the primary side resonance capacitor Cr1, and the voltage at the connection point N between the primary coil L1 and the diode D1 rises sinusoidally with the movement. Further, at the time when the excitation energy is completed from the primary coil L1 to the primary side resonance capacitor Cr1, the voltage at the connection point N is maximized.

When the voltage at the connection point N changes, the primary coil L1 is reversely excited to cause the feedback coil Lx to sense the reverse power. Thereby, the reverse voltage from the feedback coil Lx is applied and the gate of the MOS transistor Q1 is applied The pole voltage drops sinusoidally. When the movement of the excitation energy from the primary coil L1 to the primary side resonance capacitor Cr1 is completed, the energy of the movement starts to return to the primary coil L1 from the primary side resonance capacitor Cr1, and the voltage at the connection point N is returned. It is sinusoidal.

When the voltage at the connection point N changes, the primary coil L1 is positively excited to cause the feedback coil Lx to sense the positive power. Thereby, the forward voltage from the feedback coil Lx is applied and the gate voltage of the MOS transistor Q1 rises sinusoidally. Further, when the gate voltage of the MOS transistor Q1 reaches the turn-on threshold, the MOS transistor Q1 is turned on. When the MOS transistor Q1 is turned on, the drain current flows, and the second charge and discharge capacitor C2 is charged, and the base voltage of the bipolar transistor Q2 rises.

Immediately thereafter, when the base voltage of the bipolar transistor Q2 reaches the turn-on threshold, the bipolar transistor Q2 is turned on to turn off the MOS transistor Q1. When the MOS transistor Q1 is turned off, the exciting energy of the primary coil L1 starts to move again toward the primary side resonance capacitor Cr1, and the primary coil L1 is reversely excited to cause the feedback coil Lx to sense the reverse power.

Thereby, the reverse voltage from the mirror coil Lx is applied and the base voltage of the MOS transistor Q1 is reduced in a sinusoidal manner. Further, the second charge and discharge capacitor C2 starts discharging by the opening of the MOS transistor Q1. Moreover, the bipolar transistor Q2 is turned off.

Then, when the excitation energy of the primary coil L1 is completed from the primary coil L1 to the primary side resonance capacitor Cr1, the moved energy starts to return to the primary coil L1 from the primary side resonance capacitor Cr1. As the return causes the voltage at the connection point N to decrease sinusoidally, the primary coil L1 is forward The excitation coil causes the feedback coil Lx to sense positive power.

Thereby, the forward voltage from the feedback coil Lx is applied and the gate voltage of the MOS transistor Q1 rises sinusoidally. Moreover, when the gate voltage reaches the turn-on threshold, the MOS transistor Q1 is turned on.

After that, the inverter action repeats the same action. In this way, by repeating the operation of the inverter, the primary coil L1 is excited, and the alternating magnetic field is radiated toward the secondary coil L2 of the power receiving device 20 that is coupled to the primary coil L1 in the state of the coupling coefficient K.

(power receiving device)

The secondary side resonance capacitor Cr2 for resonance of the power receiving device 20 mounted on the sliding door 1 is connected in parallel with the secondary coil L2 wound around the secondary side core 21 . The secondary coil L2 generates secondary electric power by an alternating magnetic field radiated from each primary coil L1 of the power supply device 10 coupled in the state of the above-described coupling coefficient K. Further, the secondary coil L2 is connected to the full-wave rectifier circuit 25.

The full-wave rectifier circuit 25 rectifies the secondary power received by the secondary coil L2, and outputs the rectified DC voltage to the voltage stabilization circuit 26. The voltage stabilizing circuit 26 converts the voltage from the full-wave rectifying circuit 25 into the same voltage as the commercial voltage of the commercial power source frequency, and supplies the converted voltage to the electric machine provided in the housing space 1a of the sliding door 1. E. Further, the electric device E is driven in accordance with the switching voltage from the voltage stabilization circuit 26.

Next, the role of the contactless power supply system will be explained.

Supply high frequency current from the corresponding high frequency inverter 15 to each 1 Secondary coil L1. Each primary coil L1 generates an alternating magnetic field.

In this state, the sliding door 1 is moved along the door lintel 2 . Regardless of whether the sliding door 1 is moved to any position, the coupling coefficient K of the secondary coil L2 and the primary coil L1 is 0.15 or more. In the secondary coil L2, secondary electric power is generated by the alternating magnetic field of the primary coil L1.

The secondary power generated by the secondary coil L2 is rectified by the full-wave rectifying circuit 25 of the power receiving device 20, and is supplied to the electric device E through the voltage stabilizing circuit 26.

The effects of the embodiment are described below.

(1) According to the above embodiment, the primary side core 11 and the secondary side core 21 are arranged such that the size X1 of each primary core 11 and the interval D of the secondary core 11 in the moving direction And the length X2 of the secondary magnetic core 21 satisfies D≧2X1 and X2≧2X1+D.

Within the range that satisfies this condition, the power receiving device 20 can sufficiently obtain the power twice, regardless of whether the sliding door 1 is located at any position.

Since the primary coil L1 is disposed at a constant interval D, the number of primary coils L1 can be reduced. As the number of primary coils L1 decreases, the number of high frequency inverters 15 also decreases. As a result, the conventional configuration in which the coil is once wound without any gap in the moving direction of the sliding door 1 can be reduced in size, construction, and cost.

Further, since the primary coil L1 is disposed at a constant interval D, the two primary coils L1 are less likely to be touched, and the wire of the primary coil L1 may not be made thinner, and the heat of the wire may not be considered.

(2) The non-contact power supply system of the above embodiment has The primary coil L1 and the secondary coil L2 are connected in parallel to the resonant capacitors Cr1 and Cr2. Therefore, the high-frequency voltage supplied to the primary coil L1 can be boosted, and the output voltage of the secondary coil L2 can be boosted or constant. Further, when the coupling coefficient K between the primary coil L1 and the secondary coil L2 moves the sliding door 1 to a small place, power can be transmitted with high efficiency.

(3) When the high frequency inverter 15 is a voltage resonance type inverter, the voltage between the terminals of the primary coil L1 can be made high.

Further, when the high-frequency inverter 15 is of a self-excited type (MOS transistor Q1) voltage resonance type, it is possible to realize a small-sized and low-cost non-contact power supply system by vibrating with a small number of components.

(4) According to the above embodiment, the electric device E can be driven in a state where the electric device E such as a thin television or an electric fan is provided in the storage space 1a of the sliding door 1. Since the sliding door 1 can be properly moved, the degree of freedom in the arrangement of the electric machine E is improved.

The above embodiment can also be implemented as follows.

In the above-described embodiment, the primary coil L1 is wound around the intermediate portion 11b of the primary core 11, but may be wound around the both side portions 11a, or may be wound around the both side portions 11a instead of the intermediate portion 11b. Similarly, the secondary coil L2 is wound around the intermediate portion 21b of the secondary magnetic core 21, but may be wound around the both side portions 21a, or may be wound around the both side portions 21a instead of the intermediate portion 21b.

In the above embodiment, the secondary side core 21 is composed of a C core. As shown in Fig. 6, the I-type secondary magnetic core 31 can also be used. The secondary coil L2 is wound around the intermediate portion of the secondary magnetic core 31.

In the above embodiment, the primary side resonance capacitor Cr1 is used once and once. The coil L1 is connected in parallel, but may be connected in series with the primary coil L1. Similarly, the secondary side resonance capacitor Cr2 is connected in parallel to the secondary coil L2, but may be connected in series to the secondary coil L2.

In the above embodiment, the high frequency inverter 15 is not limited to one voltage resonance type inverter, and may be a half bridge type high frequency inverter or a full bridge type high frequency inverter.

In the above-described embodiment, the metal foreign matter detecting function, the authentication function, the shielding of the magnetic field or the electric field, the heat radiating mechanism for heat dissipation of the circuit, and the like, and the noise processing circuit, the energy saving standby by the intermittent coil excitation, and the like are omitted. , but can also be implemented by grouping these functions.

The moving body is not limited to the sliding door 1. The moving body may be a window glass frame, a sliding door, a fan, a partition wall, a sliding door of a furniture, or the like.

In the above-described embodiment, the secondary coil L2 provided in the moving body is not limited to one, and two or more secondary coils L2 may be provided to the movable body as long as the above conditions are satisfied.

In the above embodiment, the moving body is not limited to the moving body in the house, and may be a moving body outside the house.

It is also possible to combine two or more modified examples.

11‧‧1 times side core

11a, 21a‧‧‧ both sides

11b, 21b‧‧‧ middle part

11c, 21c‧‧‧ front face

21‧‧‧2 times side core

D‧‧1 times interval of side core 11

L1‧‧1 times coil

L2‧‧2nd coil

X1‧‧‧ thickness

X2‧‧‧ length

Claims (7)

A non-contact power supply system comprising: a power supply device comprising: a plurality of primary side magnetic cores arranged at regular intervals along an arrangement direction; and a plurality of primary windings respectively wound around the plurality of primary side magnetic cores And the moving body is moved in the arrangement direction, and the moving body is provided with a power receiving device including a long-length secondary magnetic core extending in the arrangement direction and wound around the secondary side a secondary coil of a magnetic core, wherein the moving body is configured to move the secondary magnetic core along the plurality of primary coils when the moving body moves in the arrangement direction, and to generate the second power generating device by the power receiving device The secondary power is supplied to an electric machine provided in the moving body; the plurality of primary side cores and the secondary side core are configured to satisfy D≧2X1 and X2≧2X1+D; wherein X1 represents the foregoing arrangement direction The size of each primary magnetic core in the middle, X2 indicates the length of the secondary magnetic core in the arrangement direction, and D indicates the interval of the primary magnetic core. The contactless power supply system according to claim 1, wherein the secondary magnetic core is a C-type or an I-shaped core. The contactless power supply system according to claim 1 or 2, wherein the power supply device includes a plurality of high frequency inverters that supply high frequency currents to the plurality of primary coils. The contactless power supply system according to claim 1 or 2, wherein the plurality of primary coils and the secondary coils are connected in series or in parallel with a capacitor for resonance. The contactless power supply system according to claim 1 or 2, wherein the moving body includes the storage space for the electric device. The non-contact power supply system according to claim 1 or 2, wherein the moving system is movably supported by the rail; the plurality of primary magnetic cores are disposed on the rail; and the moving body is opposite to the foregoing The position of the rail, the length of each primary core, the length of the secondary core, and the interval of the primary core are set such that the secondary core and the plurality of One or two of the primary side cores are opposed to each other. The non-contact power supply system according to claim 1 or 2, wherein the power supply device is disposed in a door lintel of a room, and the plurality of primary side magnetic cores are arranged side by side along the door lintel, and the moving body is pulled The door, the secondary magnetic core is disposed at an upper portion of the sliding door, and faces the at least one of the plurality of primary magnetic cores when the sliding door moves along the door beam.