JP2003143711A - Feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit capable of inexpensively and safely supplying power from a road surface at times when environmental issues become serious, for solving the conventional most serious issue in supplying power from a road surface which has been electrical shocks and electromagnetic disturbances to pedestrians or other objects which have been not preventive. SOLUTION: This unit includes a receiver 5 for receiving a request signal for power transmission from a vehicle, verifies the validation of a license plate number or the like at 14, and transmits high-frequency power to a receiving coil 12 from a transmission coil 10 for feeding. The transmission coil 10 is small because it has spot like and single-turn (3 to 20 turns) constitution, and transmits the high-frequency power to the receiving coil 12 only when it is covered with the vehicle body, so that accidents caused by the high frequency to pedestrians or the like can be prevented. Preferably, the receiving coil 12 is of a loop or spiral shape (a plurality of circles), and it is desirable that power is received as long as possible even when the vehicle is on travel. An additional core may be provided around or at the center of the transmitting or receiving coil for forming a magnetic path.

Description

Description: BACKGROUND OF THE INVENTION [0002] Electric trains, electric vehicles, and power supplies for disasters [0002] Conventionally, as a power supply for vehicles, overhead wires used in electric trains and trolley buses are used. This is a typical example. Living things such as humans are less likely to be electrocuted because they are stretched high, and they are still widely used as a cheap and clean energy supply method. However, in many cases, so-called streetcars and trolleybuses have been abolished due to landscape and maintenance. Fill a long coil inside the road surface,
There is a technology to move a vehicle by induction power, but there are many problems such as enormous installation costs, adverse effects of electromagnetic waves on other objects, and poor efficiency. Conventionally, the biggest problem in supplying power from a road surface is that it is impossible to prevent electric shock or electromagnetic interference to pedestrians and other objects. However, at present, when environmental problems are serious, it is necessary to invent a device that is inexpensive, safe, and capable of supplying power while traveling from the road surface. If only half of the energy is supplied by this means, less fuel is required to be mounted on the vehicle, which contributes to reducing the weight, cost, and pollution of the vehicle. In addition, the supply cost as well as the fuel can be reduced, such as the need for a stand. [0003] As a countermeasure for this, as a countermeasure, a power supply spot is provided intermittently instead of a long power line in a section where a vehicle runs, and a vehicle provided at the bottom of the vehicle. Invent a longer power receiving mechanism equal to the length. A means for energizing safely (without fear of electric shock) is required. FIGS. 1 and 2 are a schematic view and a schematic plan view, respectively, showing a cross section when three pairs of power transmission devices according to the present invention are buried on a road surface, in which a contact is used as a power transmission and an overhead wire is used as a power reception device. It is. In the figure, 1 is a contact which is pushed up by a spring and is located on the road surface, 2 is an overhead wire stretched under the floor of the automobile, 3 is an automobile (particularly driven by motor wheels), 4 is a switch, and 5 is reception (transmission) signal. Coil, 6
Is a transmitting (receiving) coil, 7 is a control device for receiving processing and turning on and off the switch 4, and 9 is a road surface. The operation will be described with reference to FIG. 1. First, even if the automobile 3 moves to the left and the overhead line 2 approaches the first contact 1 (above 7 in FIG. 1), all the contacts 1 transmit power. I haven't. (No electric shock) Even if the car advances to the left and the contact wire 1 pushes down the contact wire 2, no electric power is transmitted. Now, how to safely transmit power will be described. FIG. 2 shows that the vehicle 3 is provided with two sets of horizontally long loop-shaped (or multiple circular) transmission coils 6 adjacent to the overhead line 2, and repeats a power transmission request signal as shown in FIG. 4 from each of them. Send. In FIG. 4, for example, A may be a vehicle number code, and B may be a charge withdrawal number code. [0005] This transmission signal is received only by the receiving coil 5 sufficiently close to the vehicle. The received signal is sent to the controller 7 and the corresponding switch 4 is turned on only when it is determined that the signal codes of the two sets of receiving coils 5 match and the car number is not on the blacklist. Power is transmitted to the overhead wire 2. That is, power is not transmitted by an uncertain power transmission request signal or a normal signal of only one receiving coil. With this, there is no possibility of electric shock even if another object touches the contact. However, just in case, for example, all the contacts 1 are always sunk underground and only the corresponding contact is caught. good. Although transmission and reception use radio waves by coils, light and sound waves may be used. FIG. 3 is an example in which the signal transmission / reception line is also used as a power line. In the figure, 16 is a bypass capacitor or a transformer, 17 is an inductance, and 18 is a transceiver. Now, the transmitter / receiver 18 modulates the vehicle number code or the like to a high frequency such as 100 kHz and transmits the modulated signal. If the resonance frequency of the bypass capacitor 16 and the inductance 17 is set to 100 kHz, the signal from the transceiver 18 reaches the control device 7 when the overhead wire 2 and the contact 1 are in contact with each other. After that, the processing device 7
Checks the code of the signal, and turns on the power switch 4 if it is valid, as described above. FIG. 3 shows the decap 16 and the inductance 17 only on the rightmost contact, but the other two pairs of contacts 1
To the same way. The above-described method of transmitting power to an automobile is an example using a contact cueing on a road surface. However, an induction coil may be embedded under the road surface 9 to transmit power in a non-contact and spot manner. . FIG. 5 is a schematic cross-sectional view in this case, in which a power transmission coil is used as the power transmission and a power reception coil is used as the power reception. Reference numeral 10 denotes a power transmission coil, 11 denotes a matching capacitor, 12 denotes a power reception coil, 13 denotes a high-frequency power supply line, and 14 denotes a control device including automatic frequency adjustment. In this figure, as in FIG. 1, the receiver 5 has a receiver, receives a power transmission request signal from a vehicle, and confirms the validity of the vehicle number and the like at 14. Transmit high frequency power. The power transmission coil 10 has a spot-like single winding (3-
(20 turns), small, and high frequency power is transmitted to the power receiving coil 12 only when it is almost covered with the car body.
No damage or explosion of electronic devices such as pacemakers. It is desirable that the power receiving coil 12 has a loop shape or a spiral <a plurality of circles> shape, the length of which is as long as the vehicle body allows, so that the power can be received as long as the vehicle moves. A core for forming a magnetic path may be separately provided around or at the center of the power transmission or power reception coil. But,
With the movement of the automobile, the load impedance viewed from the power supply side changes every moment. Therefore, the frequency is finely adjusted by the control device 14 to make it a resistive impedance. FIGS. 1 and 5 show three pairs of power transmissions (contact 1 and power transmission coil 10).
However, if a plurality of power transmissions are provided and the interval between the power transmissions is set substantially equal to the length of the overhead wire 2 of the automobile, power is supplied continuously. Can receive. For example, assuming that the length of the overhead wire 2 is 8 meters, electric power can be continuously received over 24 meters. Therefore, while the vehicle is running, not only charging of the in-vehicle battery (pond) but also acceleration energy can be obtained. The control devices 7 and 14 control power transmission and reception in addition to the above power transmission. Typically, the control devices 7 and 14 rectify AC power and distribute the power to each power transmission. May be stored and used. In order to spread the power supply device, the cost is the most important, and it is necessary to reduce the number of constituent parts as much as possible. FIG. 6 shows a configuration example of a power supply device 15. This is a configuration outline in a case where AC received power is taken in as full-wave rectification, and a large rectifying reactance and a capacitor are omitted. In the figure, the dotted lines (25, 23, 24, 30) are so-called natural energy power supply units used when there is no AC power supply or when it is desired to save power. FIG. 7 is a voltage waveform. FIG. 6 shows a transformer 19 for transforming an AC voltage from a power company, 20 a full-wave rectifier, 21 a diode, and 22 an output voltage line. 23 is a solar panel, 24 is a wind power generator, and 25 is a divided battery charge control circuit. FIG. 7 shows a waveform 26 of an AC voltage full-wave rectified voltage waveform, a voltage 27 from a capacitor (a pond), a voltage reference line 28 of a level 1,
Reference numeral 29 denotes a level 2 voltage reference line. Referring to FIG. 1, first, a commercial AC voltage is converted by a transformer 19 into a voltage used for power supply.
After passing through the full-wave rectifier 19, the output voltage is output through the combining diode 21. Conventionally, a smoothing circuit by L and C is inserted after 20, but is omitted here. <It is cheaper to use only the high frequency blocking choke coil> On the other hand, the voltage of the solar panel 23 or the voltage from the wind power generator 24 is stored in the divided storage device (pond) 30 by a command of the control device 25. For example, when the value of the voltage is large, a battery (a pond) is connected in series, and when the voltage is small, the battery is connected in parallel and charged. [0013] The solid line in Fig. 7 is the storage battery (pond) stored in this way.
3 shows a composite voltage waveform of the output voltage 27 of FIG. Is it OK to apply such a non-constant voltage to the above-mentioned [Figure 1] and [Figure 5] transmission? Since a vehicle using a voltage from a power supply is usually equipped with a divided storage battery (pond) control device corresponding to 25 in FIG. 6, when charging the vehicle side, for example, 28 in FIG. In the case of the above voltage values, charging may be performed by changing the connection of a battery (pond) mounted on the vehicle, in series, in the case of 29 or more, in series / parallel in the case of 29 or less, and in parallel in the case of 29 or less. If it is desired to move the automobile at the same time, the voltage may be cut out by the so-called PWM method and applied to the motor. As described above, according to the present invention, not only the non-contact type but also the contacts exposed on the road surface can be transmitted sufficiently and safely by the control. For example, when a plurality of trolleys or electric buses equipped with an electric storage device <pond> are installed near a stop in a car, even if a person steps on the last electronic transmission, there is no electric shock. In addition, by doing so, the amount of storage battery (pond) mounted on the vehicle can be significantly reduced, the vehicle can be made lighter and cheaper, and, to put it bluntly, a new car society that does not destroy the environment can be realized. In addition, the transmission line can be used separately as a power source in the event of a disaster.

BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1]: Schematic diagram of cross-sectional configuration of contact-type power transmission [FIG. 2]: Schematic diagram of planar configuration of contact-type power transmission [FIG. 3]: Schematic diagram of planar configuration of contact-type power transmission (for both signal use) FIG. 4: Receiving signal pulse train (outline) FIG. 5: Non-contact type power transmission section outline view [FIG. 6]: (simple type) power supply device configuration diagram (outline) [FIG. 7]: Voltage waveform diagram (outline) 1: contact 16: coupling 2: overhead wire <capacitor or transformer> 3: automobile (with battery (pond)) 17: inductance 4: switch <for power> 18: transceiver 5: receiving coil (communicator) 19 : Transformer 6: Transmission coil (communication element) 20: Full-wave rectifier 7: Control device 21: Diode 8: Power line 22: Output line 9: Road surface 23: Solar panel 10: Transmission coil 24: Wind power generator 11: Matching capacitor 25: Split charging times 12: Receiving coil 26: Output voltage waveform 13: High-frequency power line 27: Battery (battery) voltage 14: Control device with fine frequency adjustment 28: Voltage level 1 reference line 15: Power supply 29: Voltage level 2 reference line 30: Divided capacitor (pond)

Claims (1)

Claims: 1. A spot power transmitting device installed on a road surface and transmitting power to a power receiving device stopped or moving thereon, a switch for turning on / off power supply to the power transmitting device, and the power receiving side. And a receiver for receiving a power transmission request signal transmitted from the processor, and a processing device that analyzes the received signal and turns on the switch only when the request for the power reception is valid and the power transmission and the power reception are close to each other. And a power supply device comprising a power supply device. 2. A contact wire as the spot power transmission, and an overhead wire stretched on the bottom of the vehicle as the power reception device are provided, respectively. 3. A power transmission device as claimed in claim 3, wherein a power transmission coil is used as the spot power transmission.
A power receiving coil stretched on the bottom of the automobile as the power receiving device,
A power supply device according to claim 1, wherein a plurality of said spot transmissions are installed on a road surface, and said spot transmissions are successively performed in accordance with movement of said reception reception. The power supply device according to claim 1, wherein the switch is switched by a command of the processing device to transmit power, and not only charging in the vehicle but also driving energy of the vehicle is obtained.