JP2014014217A - Non-contact power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power supply device, used for performing a non-contact power supply by means of magnetic energy to an electric vehicle equipped with a power incoming coil for transporting a person or a load, capable of improving power supply efficiency between a power transmission coil and the power incoming coil and suppressing leakage magnetic flux from the power transmission coil.SOLUTION: An electric vehicle having a power incoming coil for transporting a person or a load, and a vehicle having a power transmission coil and a high frequency power source, are allowed to run side by side in a position so that power supply efficiency of the power incoming coil and the power transmission coil becomes the highest.

Description

  The present invention relates to a device that supplies electric power to a traveling electric vehicle in a contactless manner.

  As a technique for supplying electric power to a traveling electric vehicle in a non-contact manner, Patent Document 1 discloses a technique using a plurality of power transmission coils and a power source, and the conventional technique will be described with reference to FIG.

  FIG. 2 shows a system in which a plurality of power transmission coils 211 to 213 are installed on the road surface 3 and power is supplied in a non-contact manner to the power receiving vehicles 11 to 12 on which the power receiving coils are mounted.

  High frequency power supplies 221 to 223 are connected to the power transmission coils 211 to 213, respectively, and by applying a high frequency voltage, each power transmission coil is excited to convert electrical energy into magnetic energy.

  The power receiving coils 111 to 112 convert magnetic energy generated from the power transmitting coils 211 to 213 into electric energy.

  A power receiving vehicle is an electric vehicle that travels by driving wheels by converting electrical energy converted by a power receiving coil into mechanical energy by a motor or the like.

  In Patent Document 1, in order to increase the power utilization rate, the high-frequency power source supplies power to the power transmission coil only when the power receiving vehicle travels on the power transmission coil.

  In the example of FIG. 2, the power receiving vehicle 11 is traveling on the power transmission coil 211, and the power receiving vehicle 12 is traveling on the power transmission coil 213, so the high frequency power supplies 221 and 223 supply power to the power transmission coils 211 and 213. To do. The high-frequency power supply 222 stops supplying power to the power transmission coil 212 because the power receiving vehicle is not traveling on the power transmission coil 212.

  In this way, it is possible to supply electric power in a non-contact manner to an electric vehicle that travels while increasing the power utilization rate.

  However, in order to supply electric power to a traveling electric vehicle in a contactless manner, the length of the power transmission coil in the traveling direction must be much longer than the length of the power receiving coil in the traveling direction, and leakage magnetic flux is generated from the power transmission coil. Arise.

  There is a possibility that the leakage magnetic flux from the power transmission coil may adversely affect the surrounding communication equipment or the human body due to the magnetic field.

JP-A-7-67206

  The problem to be solved is that non-contact power feeding is not applied to a running electric vehicle while suppressing leakage magnetic flux in order to suppress damage to surrounding communication devices and adverse effects on the human body due to a magnetic field as a medium for energy transmission. It is to supply electric power by contact.

According to the first aspect of the present invention, a device for converting electric energy on the power transmission side into magnetic energy by applying a high frequency voltage to the power transmission coil from a high frequency power source, a power receiving coil for converting the magnetic energy into electric energy on the power receiving side, and In an apparatus for supplying electric power in a non-contact manner composed of a power receiving vehicle equipped with a power receiving vehicle driving force conversion device for converting the power receiving side electric energy into driving force to drive the vehicle,
The high-frequency power source and the power transmission coil are mounted on a power transmission vehicle, and the power transmission vehicle runs parallel to the power reception vehicle and transmits magnetic energy generated from the power transmission coil of the power transmission vehicle to the power reception coil of the power reception vehicle. A non-contact power supply device that supplies power by contact.

According to the invention of claim 2, in the system of claim 1,
The power transmission vehicle travels on two conductive rails, one of the two conductive rails is a positive electrode and the other is a negative electrode. A non-contact power feeding device that supplies energy as power transmission side electric energy to the power transmission vehicle.

According to the invention of claim 3, in a road having two or more lanes on one side and an up lane,
The power transmission lane capable of feeding power from the power transmission vehicle to the power receiving vehicle of claim 1 and claim 2, the non-power feeding lane where power cannot be fed, and the central separation zone at each of the upstream lane and the downstream lane at arbitrary intervals. When a plurality of vehicles can stand by and a standby station is provided that can enter and exit from the ascending lane and descending lane, and the power receiving vehicle enters the power supply lane, the power transmitting vehicle also enters the power supply lane from the nearby standby station, and the power receiving When the vehicle and the power transmission vehicle are running side by side to supply power from the power transmission vehicle to the power receiving vehicle, and the power receiving vehicle moves to a non-powered lane, the power transmission vehicle has a standby space in the vicinity of the traveling direction. A non-contact power feeding system during traveling to an electric vehicle characterized by entering and waiting.

  According to the invention of claim 4, the power receiving coil is replaced with a photovoltaic element, the power transmitting coil is replaced with a light emitting element, and the high frequency power source is replaced with a light emitting element power source, and energy is transmitted in a non-contact manner using light energy as a medium. The non-contact electric power feeder of Claim 1 characterized by the above-mentioned.

  According to the invention of claim 5, the power reception coil is replaced with a generator by a rotating body, the power transmission coil is replaced by a blower or a pump, the high frequency power supply is replaced by a power supply of a blower or a pump, and mechanical energy by fluid is used as a medium without contact. The non-contact power feeding apparatus according to claim 1, wherein energy is transmitted by the power.

  According to the invention of claim 6, the power receiving coil is replaced with a thermoelectric generator, the power transmission coil is replaced with a heating element, the high frequency power source is replaced with a power source of the heating element, and energy is transmitted in a non-contact manner using thermal energy as a medium. The contactless power feeding device according to claim 1, wherein the contactless power feeding device is performed.

  While the power receiving vehicle and the power transmitting vehicle run side by side and appropriately control the positional relationship between the power receiving coil and the power transmitting coil, the power receiving vehicle is being contacted with the power transmitted from the power transmitting vehicle in a non-contact manner. The leakage magnetic flux which generate | occur | produces from can be suppressed.

It is the figure which showed the structure of the 1st Example. It is the figure which showed the structure of background art. It is the figure which showed the structure and operation | movement of the 2nd Example. It is the figure which showed the 3rd structure and operation | movement. It is the figure which showed the 4th structure and operation | movement. It is the figure which showed the 5th structure and operation | movement.

Supplying electric power to a running electric vehicle in a non-contact manner while suppressing leakage magnetic flux in order to suppress damage to other communication devices and influence on the human body due to a magnetic field as a medium for energy transfer in non-contact power supply The purpose was realized.
(First embodiment)

  FIG. 1 shows a first embodiment of the present invention, and the present invention will be described in detail based on FIG.

  A power receiving vehicle 1 in FIG. 1 is a vehicle that carries a person 109 and a load 110, and includes a power receiving coil 101, a power receiving vehicle driving force conversion device 100, and a steering device 108, and travels on a road surface 3.

  The power receiving vehicle driving force conversion device 100 includes a charger 102, a power storage device 103, a power receiving vehicle motor driver 104, a power receiving vehicle motor 105, a power receiving vehicle drive device 106, and a power receiving vehicle wheel 107, and is obtained from a power receiving coil. The power receiving vehicle 1 is caused to travel by converting the received power side electric energy into driving force.

  The power transmission vehicle 2 is a vehicle that transmits power to the power receiving vehicle 1, and includes a power transmission coil 201, a high frequency power source 202, and a power transmission vehicle driving force converter 200, and travels on the rail 4 below the road surface 3.

  The power transmission vehicle driving force converter 200 includes a power transmission vehicle motor driver 203, a power transmission vehicle motor 204, a power transmission vehicle drive device 205, and power transmission vehicle wheels 206 to 208, and converts power transmission side electric energy into driving force. The power transmission vehicle 2 is caused to travel.

  In the power receiving vehicle 1, the power receiving coil 101 receives magnetic energy emitted from the power transmitting coil 201 and converts it into electric energy.

  The charger 102 rectifies AC power output from the power receiving coil 101 and converts it into DC power, adjusts the voltage, and charges the power storage device 103.

  The power receiving vehicle motor driver 104 receives the electric energy stored in the power storage device 103 as input, controls the power receiving vehicle motor 105 to have a required torque, and gives mechanical energy to the power receiving vehicle driving device 106.

  The power receiving vehicle driving device 106 transmits the mechanical energy output from the power receiving vehicle motor 105 to the power receiving vehicle wheel 107 to power the power receiving vehicle 1 and travel on the road surface 3.

  The steering device 108 controls the traveling direction of the power receiving vehicle 1.

  In the power transmission vehicle 2, a high frequency voltage is applied to the power transmission coil 201 from the high frequency power source 202, converts electric energy into magnetic energy, and supplies power to the power receiving vehicle 1 via the power reception coil 101.

  The power transmission vehicle motor driver 203 controls the power transmission vehicle motor 204 to have a required torque, and gives mechanical energy to the power transmission vehicle drive device 205.

  The power transmission vehicle drive device 205 transmits the mechanical energy output from the power transmission vehicle motor 204 to the power transmission vehicle wheels 208 to power the power transmission vehicle 2 and travel on the rail 4.

  When power is supplied from the power transmission vehicle 2 to the traveling power receiving vehicle 1, the power receiving vehicle 1 runs side by side so as to match the speed in the traveling direction of the power transmission vehicle 2, and the power feeding efficiency between the power receiving coil 101 and the power transmission coil 201 is maximized. The left and right positions of the power receiving vehicle 1 are controlled by the steering device 108 and the speed of the power receiving vehicle 1 in the traveling direction is controlled by the motor driver 104 for the power receiving vehicle.

  Further, the power transmission vehicle 2 is moved in parallel so as to match the speed in the traveling direction of the power reception vehicle 1, and the power transmission vehicle motor driver 203 is set so that the power supply efficiency between the power reception coil 101 and the power transmission coil 201 is maximized. The speed in the traveling direction of the power transmission vehicle 2 may be controlled at.

Speed information and power information between the power receiving vehicle 1 and the power transmitting vehicle 2 may be transmitted by wireless communication in order to control the positional relationship that maximizes the power feeding efficiency.
In addition, a plurality of power receiving coils 101 can be mounted on the power receiving vehicle 1, and large power can be supplied to a large vehicle by supplying power from the plurality of power transmitting vehicles 2.

  Further, the wheels 206 to 20 7 of the power transmission vehicle 2 are made of a conductive material such as iron. Supplied through.

One of the rail 41 and the rail 42 is a positive electrode, and the other is a negative electrode.
(Second embodiment)

  FIG. 3 shows a second embodiment of the present invention, and the present invention will be described in detail based on FIG.

  The road 5 is composed of an up lane 51, a down lane 52, and a central separation zone 53. In the central separation zone, a plurality of standby stations 6 on which power transmission vehicles 2 wait are installed at arbitrary intervals.

  A plurality of power transmission vehicles 2 can stand by in the waiting place 6.

  The up lane 51 and the down lane 52 are each provided with a power supply lane 31 on the central separation band 53 side, and a plurality of non-power supply lanes 32 are provided on the opposite side.

  The power supply lane 31 is a lane in which power can be supplied from the power transmission vehicle 2 to the power reception vehicle 1 in a non-contact manner, and a rail 41 and a rail 42 on which the power transmission vehicle 2 travels are provided below the road surface 3.

  The non-power feeding lane 32 is a lane in which the power receiving vehicle 1 travels using the energy of the power storage device 103 mounted on the power receiving vehicle 1.

  A sequence for supplying power from the power transmission vehicle 2 to the power receiving vehicle 1 traveling in a non-contact manner will be described below with reference to FIGS.

  The power receiving vehicle 1 is traveling on the non-power-feeding lane 32 at the point A on the up lane.

  When the power receiving vehicle 1 enters the power feeding lane 31 from the non-power feeding lane 32 at the point B, the power transmitting vehicle 2 waiting in the waiting place 6 in the vicinity of the power receiving vehicle 1 enters the power feeding lane 31, and Drive down.

  At the point C, the power receiving vehicle 1 runs in parallel so as to match the speed in the traveling direction of the power transmitting vehicle 2, and the steering device 108 makes a positional relationship that maximizes the power feeding efficiency between the power receiving coil 101 and the power transmitting coil 201. The left and right positions of the power receiving vehicle 1 are controlled by the power receiving vehicle motor driver 104 in the traveling direction of the power receiving vehicle 1.

  Further, the power transmission vehicle 2 is moved in parallel so as to match the speed in the traveling direction of the power reception vehicle 1, and the power transmission vehicle motor driver 203 is set so that the power supply efficiency between the power reception coil 101 and the power transmission coil 201 is maximized. The speed in the traveling direction of the power transmission vehicle 2 may be controlled at.

  When power supply to the power receiving vehicle 1 is no longer necessary at the point D, the power receiving vehicle 1 enters the non-power supply lane 32 from the power supply lane 31, and the power transmission vehicle 2 has a standby place 6 in the vicinity of the traveling direction with a margin of standby space. Enter and wait.

  Similarly, regarding the down lane, when the power receiving vehicle 1 traveling in the non-powered lane 32 at the point E enters the power feeding lane 31 at the point F, the power transmitting vehicle standing by at the standby station 6 near the power receiving vehicle 1. 2 enters the power supply lane 31 and travels under the power receiving vehicle 1.

  At the point G, the power receiving vehicle 1 runs in parallel so as to match the speed in the traveling direction of the power transmitting vehicle 2, and the steering device 108 makes a positional relationship that maximizes the power supply efficiency between the power receiving coil 101 and the power transmitting coil 201. The left and right positions of the power receiving vehicle 1 are controlled by the power receiving vehicle motor driver 104 in the traveling direction of the power receiving vehicle 1.

  When power supply to the power receiving vehicle 1 is no longer necessary at the point H, the power receiving vehicle 1 enters the non-power supply lane 32 from the power supply lane 31, and the power transmission vehicle 2 has a standby space 6 in the vicinity of the traveling direction with a margin of standby space. Enter and wait.

  Thus, by sharing the power transmission vehicle 2 between the up lane 51 and the down lane 52, it is possible to reduce the number of the power transmission vehicles 2 and to suppress the amount of movement that the power transmission vehicle 2 travels without supplying power to the power receiving vehicle 1.

  Whether the power receiving vehicle 1 is traveling in the power feeding lane 31 or the non-power feeding lane 32 is determined by transmitting information on traveling speed and traveling position by wireless communication between the power receiving vehicle 1 and the nearby standby station 6.

Further, the information of the vehicle recognition sensor installed in the power supply lane may be transmitted to the waiting place 6.
(Third embodiment)

  FIG. 4 shows a third embodiment of the present invention, in which the power receiving coil 101 of the first embodiment is replaced with a photovoltaic element 141 such as a solar panel, the power transmitting coil 201 is replaced with a light emitting element 241 such as an LED, and a high frequency power source. 202 is replaced with a power source 242 for the light emitting element, electric energy is converted into light energy by the light emitting element 241, and converted into electric energy by the photovoltaic element 141, so that the power transmission vehicle 2 and the power receiving vehicle 1 are contacted without contact. Supply power.

  The charger 102 adjusts the voltage of electric energy obtained from the photovoltaic element 141 to charge the power storage device 103.

Light emitted from the light emitting element 241 may be not only visible light but also ultraviolet light or infrared light.
(Fourth embodiment)

  FIG. 5 shows a fourth embodiment of the present invention, in which the power receiving coil 101 of the first embodiment is replaced with a generator 151 using a rotating body such as a propeller and a synchronous generator, and the power transmitting coil 201 is replaced with a blower / pump 251. The high-frequency power source 202 is replaced with a blower / pump power supply 252 to convert electrical energy into fluid mechanical energy by the blower / pump 251 and then to electrical energy by a generator 151 using a propeller and a rotating body. Power is supplied from the vehicle 2 to the power receiving vehicle 1 in a non-contact manner.

The charger 102 rectifies AC power obtained from the generator 151 using a rotating body such as a propeller and a synchronous generator, converts the AC power into DC power, adjusts the voltage, and charges the power storage device 103.
(Fifth embodiment)

  FIG. 6 shows a fifth embodiment of the present invention. The power receiving coil 101 of the first embodiment is replaced with a thermoelectric generator 161, the power transmitting coil 201 is replaced with a heating element 261, and the high frequency power source 202 is replaced with a heating element power supply 262. Instead of this, electric energy is converted into thermal energy by the heating element 261, and converted into electric energy by the thermoelectric generator 161, so that power is supplied from the power transmission vehicle 2 to the power receiving vehicle 1 in a non-contact manner.

  The charger 102 adjusts the voltage of electrical energy obtained from the thermoelectric generator 161 to charge the power storage device 103.

  According to the present invention, electric power can be supplied to a traveling electric vehicle in a non-contact manner, and the problem of the cruising distance of an electric vehicle equipped with a power storage device can be solved.

1, 11, 12 Power-receiving vehicle 100 Power-receiving vehicle driving force converter 101, 111, 112 Power-receiving coil 102 Charger 103 Power storage device 104 Power-receiving vehicle motor driver 105 Power-receiving vehicle motor 106 Power-receiving-vehicle driving device 107, 171-172 Wheel for power receiving vehicle 108 Steering device 109 Person 110 Load 2 Power transmission vehicle 200 Power transmission vehicle driving force conversion device 201, 211-213 Power transmission coil 202, 221-223 High frequency power supply 203 Power transmission vehicle motor driver 204 Power transmission vehicle motor 205 Power transmission vehicle Driving device 206-208 Wheel for power transmission vehicle 3 Road surface 31 Feeding lane 32 Non-feeding lane 4, 41-42 Rail 5 Road 51 Up lane 52 Down lane 53 Median strip 6 Waiting area 141 Photovoltaic element 241 Light emitting element 242 Light emitting element Power supply 1 1 rotating body by the generator 251 blower pump 252 blower pump power 161 heat generating elements 261 heat generator 262 heating element power supply

Claims (6)

A device for converting electric energy on the power transmission side to magnetic energy by applying a high frequency voltage to the power transmission coil from a high frequency power source, a power receiving coil for converting the magnetic energy to electric energy on the power receiving side, and converting the electric energy on the power receiving side into driving force In a device for supplying electric power in a non-contact manner constituted by a power receiving vehicle equipped with a power receiving vehicle driving force conversion device for driving the vehicle,
The high-frequency power source and the power transmission coil are mounted on a power transmission vehicle, and the power transmission vehicle runs parallel to the power reception vehicle and transmits magnetic energy generated from the power transmission coil of the power transmission vehicle to the power reception coil of the power reception vehicle. A non-contact power supply device that supplies power by contact. The system of claim 1, wherein
The power transmission vehicle travels on two conductive rails, one of the two conductive rails is a positive electrode and the other is a negative electrode. A non-contact power feeding device that supplies energy as power transmission side electric energy to the power transmission vehicle. On roads with two or more lanes on one side and up lane,
The power transmission lane capable of feeding power from the power transmission vehicle to the power receiving vehicle of claim 1 and claim 2, the non-power feeding lane where power cannot be fed, and the central separation zone at each of the upstream lane and the downstream lane at arbitrary intervals. When a plurality of vehicles can stand by and a standby station is provided that can enter and exit from the ascending lane and descending lane, and the power receiving vehicle enters the power supply lane, the power transmitting vehicle also enters the power supply lane from the nearby standby station, and the power receiving When the vehicle and the power transmission vehicle are running side by side to supply power from the power transmission vehicle to the power receiving vehicle, and the power receiving vehicle moves to a non-powered lane, the power transmission vehicle has a standby space in the vicinity of the traveling direction. A non-contact power feeding system during traveling to an electric vehicle characterized by entering and waiting.   The energy is transmitted in a non-contact manner using light energy as a medium by replacing the power receiving coil with a photovoltaic element, the power transmission coil with a light emitting element, and the high frequency power source with a light emitting element power source. Non-contact power feeding device.   The power receiving coil is replaced with a generator by a rotating body, the power transmission coil is replaced by a blower or a pump, the high frequency power supply is replaced by a power supply of a blower or a pump, and energy is transmitted in a non-contact manner using mechanical energy of fluid as a medium. The contactless power feeding device according to claim 1, wherein   2. The energy is transmitted in a non-contact manner using heat energy as a medium by replacing the power receiving coil with a thermoelectric generator, the power transmission coil with a heating element, and the high-frequency power source with a power source of the heating element. The non-contact electric power feeder of description.

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