JP2013123307A - Non contact power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non contact power transmission device which controls a temperature while suppressing power consumption in an AC power source.SOLUTION: An atmospheric temperature in a housing 25 that houses an AC power source is controlled by a housing fan 40. A temperature is locally controlled in the housing 25 by cooling fans 41, 42. A power source side controller 26 controls the housing fan 40 and the cooling fans 41, 42 on the basis of the operation state of the AC power source.

Description

  The present invention relates to a non-contact power transmission apparatus.

  In the non-contact power transmission device, a configuration for cooling by a cooling fan is known (for example, Patent Document 1).

JP 2011-125184 A

  By the way, the AC power stand on the ground side used for non-contact charging generates a large amount of power and generates a large amount of heat, and a large number of cooling fans are installed for cooling. When the AC power supply of the AC power supply stand is used, each fan is always on, which leads to an increase in power consumption.

  The objective of this invention is providing the non-contact electric power transmission apparatus which can adjust temperature, suppressing power consumption in AC power supply.

  The invention according to claim 1 houses the AC power supply, the primary coil to which AC power is supplied from the AC power supply, the secondary coil capable of receiving the AC power from the primary coil, and the AC power supply. A first temperature adjusting means for adjusting an ambient temperature inside the casing, a second temperature adjusting means for locally adjusting the temperature inside the casing, and an operating state of the AC power supply And a control means for controlling the first temperature control means and the second temperature control means based on the above.

  According to the first aspect of the present invention, AC power is supplied from the AC power source to the primary coil, and AC power can be received from the primary coil in the secondary coil. The first temperature control means can adjust the atmospheric temperature inside the housing that houses the AC power supply. The inside of the housing can be locally controlled by the second temperature control means. The control means controls the first temperature control means and the second temperature control means based on the operating state of the AC power supply.

Therefore, the temperature can be controlled while suppressing power consumption in the AC power supply based on the operating state of the AC power supply.
The gist of the invention according to claim 2 is that, in the non-contact power transmission device according to claim 1, the second temperature adjusting means individually regulates the temperature of the devices constituting the AC power supply.

According to the second aspect of the present invention, it is possible to individually control the temperature of the devices constituting the AC power supply.
According to a third aspect of the present invention, in the non-contact power transmission device according to the first or second aspect, the control unit is configured to perform the first temperature control unit in response to the completion of power supply during power supply standby, during power supply, or during power supply. The gist is to control the second temperature control means.

According to the third aspect of the present invention, it is possible to control the first temperature control means and the second temperature control means during standby of power supply, during power supply, and upon completion of power supply.
According to a fourth aspect of the present invention, in the non-contact power transmission device according to the first or second aspect of the present invention, the non-contact power transmission device further includes a temperature detection unit that detects a temperature of a device that constitutes the AC power supply. The gist is to control the first temperature control means and the second temperature control means based on the temperature of the equipment constituting the AC power supply detected by the detection means.

According to invention of Claim 4, a 1st temperature control means and a 2nd temperature control means can be controlled based on the temperature of the apparatus which comprises alternating current power supply.
According to a fifth aspect of the present invention, in the contactless power transmission device according to the first or second aspect, the control unit is configured to control the first temperature control unit and the first temperature control unit based on output power or reflected power of the AC power source. The gist is to control the second temperature control means.

  According to the fifth aspect of the present invention, the first temperature control means and the second temperature control means can be controlled based on the output power or reflected power of the AC power supply.

  ADVANTAGE OF THE INVENTION According to this invention, it can control temperature, suppressing power consumption in AC power supply.

The perspective view which shows typically the whole structure of the non-contact electric power transmission apparatus in embodiment. The block diagram which shows typically the electric constitution of a non-contact electric power transmission apparatus. The cross-sectional view which shows typically the structure of the alternating current power supply stand of a non-contact electric power transmission apparatus. The cross-sectional view which shows typically the structure of the alternating current power supply stand of another example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the non-contact power transmission device 10 includes an AC power supply stand 20 as a ground side facility (charging station) and a vehicle-mounted device 30. The AC power supply stand 20 can charge the vehicle-mounted battery 33 of the vehicle-mounted device 30 described later in a non-contact state.

  The AC power supply stand 20 includes an AC power supply 21, and the AC power supply 21 has an AC / DC unit 22 and a DC / RF unit 23. That is, the AC / DC unit 22 and the DC / RF unit 23 are devices that constitute the AC power supply 21. In the AC power supply 21, AC power is input from the outside and has an AC power with a frequency higher than the frequency of the AC power. Convert to and output.

  The AC power supply stand 20 has a box-shaped housing 25. As shown in FIG. 3, an AC power supply 21 (AC / DC unit 22, DC / RF unit 23) is accommodated in the housing 25. A power supply controller 26 is disposed inside the housing 25. The AC power supply 21 and the like are controlled by the power supply controller 26.

  The AC / DC unit 22 is configured using a power switching element or the like, and converts AC power input from the outside into DC power. When the AC / DC unit 22 is driven, heat is generated with the switching operation of the power switching element. The DC / RF unit 23 is configured using a power switching element or the like, and receives DC power from the AC / DC unit 22 and converts it into AC power. When the DC / RF unit 23 is driven, heat is generated along with the switching operation of the power switching element.

  As shown in FIG. 1, the primary coil 27 is arranged outside the AC power supply stand 20 so as to be separated. The primary coil 27 is electrically connected to the DC / RF unit 23 inside the AC power supply stand 20 via wiring. In this way, the primary coil 27 is connected to the AC power source 21, and AC power is supplied to the primary coil 27 from the AC power source 21.

  As shown in FIG. 2, the vehicle-mounted device 30 is mounted on the vehicle C. The vehicle-mounted device 30 includes a secondary coil 31, a rectifier 32, a battery 33, and a vehicle-side controller 34. The secondary coil 31 can receive AC power from the primary coil 27. A rectifier 32 is connected to the secondary coil 31. A battery 33 as a load is connected to the rectifier 32.

  The primary coil 27 and the secondary coil 31 are formed of electric wires. For the electric wire constituting the coil, for example, an insulated vinyl-coated wire is used. The winding diameter and the number of turns of the coil are appropriately set according to the magnitude of power to be transmitted.

In the vehicle-mounted device 30, the rectifier 32 provided between the secondary coil 31 and the battery 33 is converted into DC power.
As shown in FIGS. 1 and 3, a housing fan 40 is installed on a standing surface of a box-shaped housing 25 in the AC power supply stand 20. The case fan 40 is a suction or push-in fan, and the internal atmosphere temperature of the case 25 can be lowered by exchanging air inside the case 25 with outside air by driving the case fan 40. Thereby, when the air around the units 22 and 23 becomes high as the units 22 and 23 are driven, the air can be exhausted. Moreover, the air warmed so far can be cooled.

  As shown in FIG. 3, a cooling fan 41 is installed in the AC / DC unit 22 inside the housing 25 in the AC power supply stand 20. The AC / DC unit 22 can be directly cooled by driving the cooling fan 41.

  A cooling fan 42 is installed in the DC / RF unit 23 inside the housing 25 of the AC power supply stand 20. The DC / RF unit 23 can be directly cooled by driving the cooling fan 42.

The power supply side controller 26 can drive and control the housing fan 40 and the cooling fans 41 and 42.
As shown in FIG. 2, the power supply side controller 26 and the vehicle side controller 34 can exchange data by wireless communication. Specifically, wireless communication can be performed when the power source side antenna An1 and the vehicle side antenna An2 are used closer than a predetermined distance.

  The power supply side controller 26 in the AC power supply stand 20 uses the power supply side antenna An1 to detect whether or not communication with the vehicle side antenna An2 is possible.

  Further, when the vehicle C approaches the AC power supply stand 20 and can perform wireless communication, the power supply controller 26 determines that communication has been established and prepares for charging. In other words, the power supply side controller 26 determines that charging preparation is in progress (the vehicle C is nearby and wireless communication with the vehicle C is possible).

  From the state where the vehicle C is nearby and wireless communication with the vehicle C is possible, the non-contact power transmission device 10 moves the vehicle to a state where the secondary coil 31 is positioned on the primary coil 27 as shown in FIG. Position C. Specifically, the power supply side controller 26 causes the AC power supply 21 to output AC power that is lower than the power during battery charging. On the other hand, the vehicle-side controller 34 determines whether or not AC power equal to or higher than the threshold value is received by the vehicle-side secondary coil 31 via the primary coil 27. The vehicle-side controller 34 informs the driver that the secondary coil 31 is located at a regular position if the secondary coil 31 can receive AC power equal to or greater than the threshold value. Thereby, vehicle parking positioning can be performed. The power supply side controller 26 detects that the vehicle parking positioning is being performed by wireless communication with the vehicle side controller 34. When this vehicle parking positioning is performed, the units 22 and 23 of the AC power source 21 do not reach a very high temperature because of the low power output.

  After the vehicle parking positioning, the power supply side controller 26 outputs a high power alternating current from the alternating current power supply 21 to charge the battery 33. The vehicle-side controller 34 monitors the state of charge of the battery 33. When the charging is completed, a charging completion signal is sent from the vehicle-side controller 34 to the power-side controller 26 by wireless communication. With this signal, the power supply side controller 26 detects the completion of charging and stops the output of the AC power from the AC power supply 21.

  Further, the non-contact power transmission device 10 detects an error. Specifically, the element temperature is detected in the AC power supply 21 (each unit 22, 23), and an error occurs when the element temperature exceeds the threshold value and becomes high. An error occurs when a large current flows in the AC power supply 21 (each unit 22, 23) such that the energization current exceeds the threshold value. Charging is stopped when such an error occurs. The power supply side controller 26 detects the charge stop accompanying this error.

Next, the operation of the non-contact power transmission apparatus 10 configured as described above will be described.
When power is transmitted to the battery 33, the vehicle C is stopped at a predetermined position near the AC power supply stand 20 for feeding (charging) (a state where the primary coil 27 and the secondary coil 31 shown in FIG. 1 face each other). Thus, power is supplied to the battery 33.

  AC power is output from the AC power source 21 to the primary coil 27, and the primary coil 27 receives power from the AC power source 21 and sends power to the secondary coil 31. Further, the secondary coil 31 receives AC power from the primary coil 27. Then, after the electric power received by the secondary coil 31 is rectified in the rectifier 32, DC power is supplied to the battery 33.

The power supply side controller 26 detects the state of the AC power supply 21 and controls the housing fan 40 and the cooling fans 41 and 42 according to the operation state of the AC power supply 21.
Specifically, during standby (a state where the vehicle C is not present), the power supply side controller 26 stops driving (turns off) all the casing fan 40 and the cooling fans 41 and 42.

  During the subsequent charging preparation (the vehicle C is present and communication with the vehicle C is established), the power supply side controller 26 drives the housing fan 40 and stops driving the cooling fans 41 and 42 (chassis). Only the body fan 40 is turned on).

  In the subsequent vehicle parking positioning, since the temperature does not increase so much, the power supply side controller 26 drives the housing fan 40 and stops driving the cooling fans 41 and 42 (only the housing fan 40 is turned on).

During the subsequent charging, the power supply side controller 26 drives all of the housing fan 40 and the cooling fans 41 and 42 (turns on all the fans 40 to 42).
When charging is completed, the power supply side controller 26 stops driving the housing fan 40 and the cooling fans 41 and 42 after a certain time (turns off all the fans 40 to 42 after a certain time). When the charging is completed, the power supply side controller 26 may immediately stop the driving of the housing fan 40 and the cooling fans 41 and 42.

  On the other hand, when the charging is stopped due to an error, that is, when the driving of the units 22 and 23 is stopped and the charging operation is not performed, the power supply controller 26 controls the housing fan 40 and the cooling fans 41 and 42. The drive is stopped (all fans 40 to 42 are turned off).

As described above, according to the present embodiment, the following effects can be obtained.
(1) In the ground-side equipment of the non-contact power transmission device 10, in addition to the AC power source 21 and the primary coil 27, the housing 25, the housing fan 40 as the first temperature control means, the second temperature control. Cooling fans 41 and 42 as means and a power supply side controller 26 as control means are provided. An AC power supply 21 (each unit 22, 23) is accommodated in the housing 25. The ambient temperature inside the housing 25 can be adjusted by the housing fan 40. With the cooling fans 41 and 42, the inside of the housing 25 can be locally controlled. The power supply controller 26 controls the housing fan 40 and the cooling fans 41 and 42 based on the operating state of the AC power supply 21. Thereby, based on the operation state of AC power supply 21, it can control in AC power supply 21, suppressing power consumption.

  More specifically, the chassis fan 40 and the cooling fans 41 and 42 are controlled by the power supply side controller 26 of the AC power supply stand 20 according to the state of the AC power supply 21, that is, according to the output state such as low power output or high power output. On / off control can be performed to reduce power consumption and noise.

  (2) Since the second temperature adjusting means is the cooling fans 41 and 42 that individually control the temperatures of the units 22 and 23 that constitute the AC power supply 21, the units 22 and 23 are individually controlled in temperature. can do.

  (3) Since the power supply side controller 26 as the control means controls the housing fan 40 and the cooling fans 41 and 42 according to the completion of power supply during power supply standby, power supply, power supply standby, power supply standby, The housing fan 40 and the cooling fans 41 and 42 can be controlled in accordance with the completion of power feeding.

The embodiment is not limited to the above, and may be embodied as follows, for example.
As shown in FIG. 4 instead of FIG. 3, the temperatures of the AC / DC unit 22 and the DC / RF unit 23 that require cooling in the high power system are monitored by temperature sensors 50 and 51, respectively. Then, the power supply side controller 26 controls on / off of the cooling fans 41 and 42 for each of the units 22 and 23 according to the temperature state of the units 22 and 23 by the temperature sensors 50 and 51. Further, even during charging, if the unit temperature detected by the temperature sensors 50 and 51 is low, the fans 41 and 42 are turned off. Thereby, low power consumption and low noise can be achieved.

  In this manner, the temperature sensors 50 and 51 as temperature detecting means for detecting the temperatures of the units 22 and 23 as the devices constituting the AC power supply 21 are further provided. Then, the power supply side controller 26 serving as the control means controls the housing fan 40 and the cooling fans 41 and 42 based on the temperature of the devices (units 22 and 23) constituting the AC power supply 21 detected by the temperature sensors 50 and 51. Control. Thus, the housing fan 40 and the cooling fans 41 and 42 can be controlled based on the temperature of the devices (units 22 and 23) constituting the AC power supply 21 by the temperature sensors 50 and 51.

  -The output power and reflected power in the AC power supply 21 may be detected, and on / off of the fans 40, 41, 42 may be controlled according to the output power or reflected power. Specifically, a detector is provided at the output stage of the AC power supply 21 on the AC power supply stand 20 side to detect output power from the AC power supply 21 and reflected power (reflected power), and based on the detection result, the fan 40. , 41, and 42 are controlled on and off.

  In this way, the power supply side controller 26 controls the housing fan 40 and the cooling fans 41 and 42 based on the output power or reflected power of the AC power supply 21. Thereby, the housing fan 40 and the cooling fans 41 and 42 can be controlled based on the output power or reflected power of the AC power supply 21.

-It is not restricted to turning on and off the fans 40, 41, and 42. For example, the cooling capacity may be changed by controlling the rotational speed of the fans 40, 41, and 42.
-Although the atmospheric temperature inside the housing | casing 25 which accommodated AC power supply 21 was adjusted using the housing fan 40, it is not limited to this, For example, using a water-cooled cooler other than an air cooling system The ambient temperature inside the housing 25 may be adjusted.

  Although the temperature of the inside of the housing 25 is locally controlled using the cooling fans 41 and 42, the present invention is not limited to this. For example, a water-cooled cooler or a Peltier device is used in addition to the air cooling system. You may make it temperature-control the inside of the body 25 locally.

  DESCRIPTION OF SYMBOLS 10 ... Non-contact power transmission device, 21 ... AC power supply, 22 ... AC / DC unit, 23 ... DC / RF unit, 25 ... Housing, 26 ... Power supply side controller, 27 ... Primary coil, 31 ... Secondary coil, 40 ... Case fan, 41 ... Cooling fan, 42 ... Cooling fan, 50 ... Temperature sensor, 51 ... Temperature sensor.

Claims (5)

AC power supply,
A primary coil to which AC power is supplied from the AC power source;
A secondary coil capable of receiving the AC power from the primary coil;
A housing for storing the AC power supply;
First temperature adjusting means for adjusting the atmospheric temperature inside the housing;
Second temperature adjusting means for locally adjusting the temperature inside the housing;
Control means for controlling the first temperature control means and the second temperature control means based on the operating state of the AC power supply;
A non-contact power transmission device comprising:   The non-contact power transmission apparatus according to claim 1, wherein the second temperature control unit individually controls the temperature of the devices constituting the AC power supply.   3. The control device according to claim 1, wherein the control unit controls the first temperature control unit and the second temperature control unit in response to power supply standby, power supply, and completion of power supply. 4. Non-contact power transmission device. A temperature detection means for detecting the temperature of the equipment constituting the AC power supply;
The said control means controls the said 1st temperature control means and the said 2nd temperature control means based on the temperature of the apparatus which comprises the said alternating current power supply detected by the said temperature detection means. The contactless power transmission device according to 1 or 2.   The non-contact according to claim 1, wherein the control unit controls the first temperature control unit and the second temperature control unit based on output power or reflected power of the AC power supply. Power transmission device.