JP2019115245A - Power supply device - Google Patents

Abstract

To provide a power supply device which allows for improvement of the added-value using a movable member.SOLUTION: A power supply device 5 for supplying power to an electrostatic sensor 4 as a load includes transmission unit 6 and a primary coil 7 for transmission provided in the door body, and a secondary coil 8 for power reception and a power reception unit 9 provided in the door glass. The primary coil 7 and the secondary coil 8 are inductively coupled in noncontact state with each other. When the primary coil 7 on the door body side is driven, electric power is obtained by inductive coupling with the door glass side secondary coil 8, and this electric power is supplied to the electrostatic sensor 4 as a load. Furthermore, load modulation is executed by a load modulation circuit 14, and the current value of the primary coil 7 is monitored through demodulation operation by a demodulation circuit 11. In other words, communication by load modulation system is executed through the primary coil 7 and the secondary coil 8. Since power supply to the door glass and communication are possible, additional value using glass can be provided.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power supply device for supplying power to a load.

  Patent Document 1 discloses a technique in which an electrostatic sensor is provided on a door glass of a vehicle, and the electrostatic sensor is used to perform pinch detection. In a so-called power window, when pinching is detected by the electrostatic sensor during closing operation of the door glass, the operation of the door glass is reversed. As a result, the pinched object is released from the door glass. The signal obtained by the electrostatic sensor is acquired by an ECU (Electronic Control Unit: electronic control unit) on the door body side, and the ECU analyzes the signal to determine the presence or absence of pinching.

JP, 2008-297756, A ([Figure 2], [Figure 12], [Figure 13])

  If you try to feed the electrostatic sensor or return the signal obtained by the electrostatic sensor to the ECU all by wire through the harness, the door glass will move, and the harness may expand and contract, which may cause disconnection. And it has been difficult to put it into practice in terms of power supply.

  The present invention has been made in view of such problems, and an object thereof is to provide a power feeding device capable of improving added value using a movable member.

  The power supply apparatus for solving the above problems is a power supply apparatus for supplying power to a load, wherein one of a primary coil and a secondary coil inductively coupled to each other in a non-contact manner is provided on a movable member, Supply to the load.

  According to this configuration, the movable member is provided with one of the primary coil and the secondary coil for non-contact power feeding, and power obtained by inductive coupling with the other is supplied to the load. Thereby, the function of non-contact electric power feeding is exhibited including a movable member. Therefore, added value using the movable member can be improved.

  In the power feeding apparatus, the movable member is provided with the load together with the secondary coil, and the current value of the primary coil is changed between a no load state and a load state according to a signal obtained by the load. In order to achieve this, a load modulation circuit connected to the secondary coil may be further provided.

  According to this configuration, the no-load state and the load state can be determined by monitoring the current value of the primary coil. In other words, communication by the load modulation scheme becomes possible through the primary coil and the secondary coil. Therefore, non-contact power feeding and communication can be compatible, and the added value using the movable member can be further enhanced.

  In the above power feeding device, the movable member is an open / close member displaced between a fully open position and a fully closed position, and the primary coil and the secondary coil are always always regardless of the open / close position of the open / close member. The two may be inductively coupled in a noncontact manner.

  According to this configuration, the primary coil and the secondary coil are inductively coupled regardless of the open / close position of the open / close body, and power feeding and communication become possible. At this time, the coil lengths of the primary coil and the secondary coil are made different, for example, a long coil length (large loop cross-sectional area) and a short secondary coil (short loop cross-sectional area) are not contacted. Make them face each other. When the open / close member is in the fully open position, the secondary coil is opposed at one end in the loop of the primary coil, and when the open / close member is in the fully closed position, the other end in the loop of the primary coil is 2 The next coils may face each other.

  According to the present invention, added value using a movable member can be improved.

The figure which shows the door of the vehicle to which the power window which has a pinch detection function was applied. FIG. 2 is a block diagram showing an electrical configuration of a power feeding device. (A) is a figure which shows the positional relationship of the primary coil in the window close state, and a secondary coil, (b) is a figure which shows the positional relationship of the primary coil in the window open state, and a secondary coil. The waveform which shows the electric current value of a primary coil.

Hereinafter, an embodiment of a power feeding device will be described.
As shown in FIG. 1, a power window 1 of a vehicle electrically drives a door glass 2 as a movable member by an actuator such as a motor. The door glass 2 corresponds to an open / close member which opens and closes a window while sliding in the vertical direction along the window frame of the door main body 3 which is a support body. In the door glass 2, the opening operation is realized by the lowering operation, and the closing operation is realized by the rising operation.

  An electrostatic sensor 4 for sandwiching detection is provided on the upper end surface of the door glass 2 and the inclined end surface continuous to it and the side end surface on the vehicle front side continuous to it. Instead of or in addition to the side end face on the vehicle front side, the electrostatic sensor 4 may be provided on the side end face on the vehicle rear side. When the electrostatic capacitance due to the charge stored in the electrostatic sensor 4 becomes equal to or more than the threshold value, the entrapment is positively detected. At that time, depending on the setting of the threshold value, in addition to the contact of the charged substance, the approach of the charged substance can be detected.

  As shown in FIG. 2, the power feeding device 5 for supplying power to the electrostatic sensor 4 as a load is provided in the door glass 2 and the power transmission unit 6 provided in the door main body 3 and the primary coil 7 for power transmission. The secondary coil 8 for power reception and the power reception unit 9 are provided. The primary coil 7 and the secondary coil 8 are inductively coupled to each other in a noncontact manner.

  The power transmission unit 6 is a power window ECU that controls overall control of the opening / closing operation of the door glass 2 or another ECU, and is supplied with + B (12 V as an example) from the vehicle power supply 15 and is a primary coil In addition to the driver circuit 10 for driving 7, a demodulation circuit 11 for demodulating the signal received by the primary coil 7 is provided. The power receiving unit 9 has a no-load state and a load state according to a signal obtained by the electrostatic sensor 4 as well as a rectifier circuit 12 for rectifying power obtained by inductive coupling of the primary coil 7 and the secondary coil 8. The load modulation circuit 14 connected to the secondary coil 8 in order to change the current value of the primary coil 7 generates a constant voltage from the rectified power of the rectification circuit 12 to generate a static voltage for the electrostatic sensor 4 and the load modulation circuit 14. A constant voltage circuit 13 is provided.

  Referring to FIG. 1, the coil lengths of primary coil 7 and secondary coil 8 are different, and the coil length is long (a large loop cross-sectional area) primary coil 7 and the coil length is short (a small loop cross-sectional area) 2 The next coil 8 faces in a non-contact state. And as shown to Fig.3 (a), when the door glass 2 exists in a fully closed position, the secondary coil 8 opposes at the one end side in the loop of the primary coil 7, and as shown in FIG.3 (b) When the door glass 2 is in the fully open position, the secondary coil 8 faces the other end side in the loop of the primary coil 7. Thereby, the primary coil 7 and the secondary coil 8 are always inductively coupled to each other in a noncontact manner regardless of the open / close position of the door glass 2.

Next, the operation of the power feeding device 5 will be described.
Referring to FIG. 2, when the primary coil 7 on the door main body 3 side is driven, power is obtained by inductive coupling with the secondary coil 8 on the door glass 2 side, and this power is an electrostatic sensor as a load 4 is supplied. Thereby, the presence or absence of pinching can be detected using the electrostatic sensor 4. A state without pinching is a no load state, and a state with pinching is a load state.

  The load modulation by the load modulation circuit 14 is performed, and the current value of the primary coil 7 is monitored through the demodulation operation by the demodulation circuit 11. That is, communication by the load modulation system is performed through the primary coil 7 and the secondary coil 8. In the example of FIG. 4, the current value in the loaded state is smaller than the current value in the unloaded state, and it is possible to determine the unloaded state and the loaded state by changing the current value. In addition, since a current flows in the primary coil 7 even in a loaded state, it is possible to supply power at the time of loading.

As described above, according to the present embodiment, the following effects can be achieved.
(1) The door glass 2 which is a movable member is provided with the secondary coil 8 of the primary coil 7 and the secondary coil 8 for non-contact power feeding, and the power obtained by inductive coupling with the primary coil 7 is It is supplied to the electrostatic sensor 4 as a load. Thereby, the function of non-contact electric power feeding including the door glass 2 is exhibited. Therefore, added value using the door glass 2 can be improved.

  (2) By monitoring the current value of the primary coil 7, the no-load state and the load state can be determined. In other words, through the primary coil 7 and the secondary coil 8, communication by the load modulation system becomes possible. Therefore, non-contact power feeding and communication can be compatible, and the added value using the door glass 2 can be further enhanced.

(3) The primary coil 7 and the secondary coil 8 are inductively coupled regardless of the open / close position of the door glass 2 to enable power supply and communication.
(4) By using the non-contact power feeding coil (primary coil 7 and secondary coil 8), power can be supplied to a glass-mounted product (an example is the electrostatic sensor 4) without using a wired connection.

(5) By changing the primary and secondary coil lengths, the coils are coupled regardless of the state of the window, and power supply and communication become possible.
(6) By adopting a load modulation method, communication can be performed while supplying power to a glass-mounted product.

(7) Since the primary side current value changes between the no-load state and the load state, the change makes it possible to determine 1/0.
(8) Since a current flows even in a loaded state, power can be supplied at the time of loading.

(9) Since power supply and communication to the door glass 2 are enabled, added value using glass can be provided.
The above embodiment can be embodied with the following modifications.

-Regarding load modulation by the load modulation circuit 14, the current value in the loaded state may be larger than the current value in the unloaded state.
-Regarding added value using the door glass 2, instead of using the electrostatic sensor 4 as a load, a touch panel may be provided as a load on the door glass 2 and a user operation on the touch panel may be detected.

  -With regard to added value using the door glass 2, instead of using the electrostatic sensor 4 as a load, a display by a liquid crystal element or an EL (electroluminescence) element is provided as a load on the door glass 2, and the display is used You may display a welcome display for the user.

  -Based on the fact that the door body 3 is an opening / closing body for the vehicle body, the present invention may be embodied as a power feeding device for supplying the power of the on-board battery of the vehicle body to the load such as the power transmission unit 6 provided in the door body 3 . In this case, the secondary coil of the primary coil and the secondary coil inductively coupled to each other in a non-contact state is provided to the door main body 3 as the movable member, and the power by inductive coupling is a load as the door is closed. The power transmission unit 6 is supplied.

  · Assuming that the door glass 2 is on the power transmission side, the door glass 2 is provided with a primary coil instead of the secondary coil, and the door body 3 is provided with a secondary coil, and they are inductively coupled in a noncontact manner The present invention may be embodied in a feed system. In this case, by providing the door glass 2 with the function of solar power generation, it is possible to supply electric power by solar power generation to an ECU or the like of the door main body 3.

  DESCRIPTION OF SYMBOLS 1 ... Power window, 2 ... Door glass (movable member, opening and closing body), 3 ... door body, 4 ... Electrostatic sensor (load), 5 ... Power feeding device, 6 ... Power transmission unit, 7 ... Primary coil, 8 ... 2 Next coil, 9: power reception unit, 10: driver circuit, 11: demodulation circuit, 12: rectification circuit, 13: constant voltage circuit, 14: load modulation circuit, 15: vehicle power supply.

Claims (3)

In the feeding device for supplying power to the load,
One of a primary coil and a secondary coil inductively coupled to each other in a non-contact state is provided on a movable member, and supplies power by inductive coupling to a load. The movable member is provided with the load together with the secondary coil, and the secondary coil is configured to change a current value of the primary coil in a no-load state and a load state according to a signal obtained by the load. The power supply device according to claim 1, further comprising a load modulation circuit connected to the circuit. The movable member is an open / close member that is displaced between a fully open position and a fully closed position,
3. The power supply device according to claim 1, wherein the primary coil and the secondary coil are always inductively coupled in a noncontact manner with each other regardless of the open / close position of the open / close member.