JP2013013264A - Circuit system of electric vehicle including power storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable securing the braking force by storing the braking power in the power storage device and reuse of the stored power without providing an adjustment means of the power and without influencing the operation of room lights and the air conditioning apparatus in the process of storing and reuse in an electric vehicle with the power storage device.SOLUTION: The electric vehicle is operated at power running time by shutting switches 5 and 7, connecting an auxiliary power supply device 3 and an electric vehicle drive device 4 to a current collecting device 1, and supplying power from a trolley wire to an auxiliary power supply device 3 and the electric vehicle drive device 4. The generated power of the electric vehicle drive device 4 is stored in the power storage device 2 and the electric brake power is secured, without influencing the auxiliary power supply device and the trolley wire by opening a switch 7, shutting switches 5 and 6, and connecting a current collecting device 1 and an auxiliary power supply device 3, and a power storage device 2 and the electric vehicle drive device 4 at braking time. When reusing the electric power stored in the power storage device 2, the switch 7 is opened, the switches 5 and 6 are shut and the power is supplied to the electric vehicle drive device 4 without influencing the auxiliary power supply device.

Description

  The present invention provides an electric vehicle that travels by being supplied with electric power from a train line, and includes an electric storage device, whereby the electric motor for driving stores electric power generated during braking and uses the electric power stored in the own vehicle. The present invention relates to a circuit system that makes it possible.

  In electric vehicles, the power generated by the drive motor during braking is regenerated to the train line, and the power generated to other electric vehicles in the same power system through the train line Electric power regenerative braking is performed to obtain braking force by supplying and consuming power. However, the power regenerative brake has a drawback in that it cannot obtain the braking force when there is no other electric vehicle that consumes power during braking or when the other electric vehicle cannot consume power. .

  In order to compensate for this drawback, a system has been devised in which a resistor and a means for controlling the current flowing through the resistor are provided to consume power that cannot be consumed by other electric vehicles. However, this method has a disadvantage that the power consumed by the resistor is dissipated as heat and cannot be reused.

  In addition to the above method, a method has been devised in which a power storage device is connected to store power that cannot be consumed by another electric vehicle, and the stored power can be reused by the own vehicle. Here, as a method of supplying the stored power to the own vehicle, a method of supplying power only from the power storage device by stopping power supply from the train line, and a power supply from both the train line and the power storage device simultaneously. However, in the former case, the power supply is temporarily interrupted when the power supply source is switched, and the indoor lamps and the air conditioner are stopped. Therefore, it is necessary to restart these after the power supply source is switched. There is. In the latter case, there is a problem that means for adjusting the power supplied to the train line and the power storage device is required.

JP 2001-186775 A

  The problem to be solved is that in an electric vehicle equipped with a power storage device, it is possible to secure brake force by accumulating brake power in the power storage device and to reuse the stored power without providing power adjustment means. In addition, in the process of accumulation and reuse, it is possible without affecting the operation of the room lamp and the air conditioning unit.

  In order to solve the above-described problem, according to the invention of claim 1, in an electric vehicle including a current collector, a power storage device, an auxiliary power supply device, and an electric vehicle drive device, the first connected in series to the current collector The auxiliary power device connected to the current collector via the first switch, the second switch connected in series to the power storage device, and the second switch A connection point between the electric vehicle driving device connected to the power storage device via the first power switch, the first switch and the auxiliary power supply device, and a connection point between the second switch and the electric vehicle drive device. It is characterized by being comprised by the 3rd switch which connects between.

  According to a second aspect of the present invention, in the first aspect, all or any one of the first switch, the second switch, and the third switch is a circuit breaker. And

  According to a third aspect of the present invention, in the first aspect, the first switch and the second switch or both of them are a circuit breaker and a switch connected in series. And

The present invention has the following advantages.
(1) The current collector connected to the train line is connected between the auxiliary power supply device via the first switch, the power storage device and the electric vehicle drive device are connected via the second switch, And connecting the connection point between the first switch and the auxiliary power supply unit and the connection point between the second switch and the electric vehicle drive device via the third switch, thereby providing the first switch. By closing the second switch and opening the third switch, the power storage device and the electric vehicle drive device can exchange power without affecting the train line and the auxiliary power supply device.
(2) With the above configuration, the first power switch and the third switch are closed and the second switch is opened, so that the auxiliary power supply device and the electric vehicle drive device operate with electric power of the train line. Can be used.
(3) With the above configuration, as an electric vehicle in which the auxiliary power supply device and the electric vehicle drive device operate with the electric power of the power storage device by closing the second switch and the third switch and opening the first switch Can be used.

It is a figure which shows the structural example of the electric vehicle which implemented this invention. FIG. 3 is a circuit configuration diagram in a case where electric power generated by an electric vehicle driving device is stored in a power storage device and in which stored electric power is reused. Example 1 FIG. 6 is a circuit configuration diagram when used as an electric vehicle operated by electric power of a train line. (Example 2) FIG. 3 is a circuit configuration diagram when used as an electric vehicle that operates with electric power of a power storage device. (Example 3)

  1A is a main circuit configuration to which the present invention is applied, FIG. 1B is a configuration example of a power storage device configured by a DC battery, and FIG. 1C is an auxiliary power supply device configured by an inverter device and the like. A configuration example and FIG. 4D are configuration examples of an electric vehicle driving device including an inverter device and a driving motor. In FIG. 1A, a switch 5 and an auxiliary power device 3 are connected in series with the current collector 1. In addition, the switch 6 and the electric vehicle drive device 4 are connected to the power storage device 2 in series. A line branched from the connection line between the switch 5 and the auxiliary power supply device 3 and a line branched from the connection line between the switch 6 and the electric vehicle drive device 4 are connected to the switch 7 respectively. .

The power storage device 2 shown in FIG. 1B includes a DC secondary battery 21 serving as a power storage medium.
The auxiliary power supply device 3 shown in FIG. 1 (c) is a load type device comprising a stationary converter 31 comprising a switch SW1, a reactor L1, a capacitor C1, an inverter 31a, a filter 31b, and a transformer 31c, and an indoor lamp and an air conditioner. The static conversion device 31 converts a direct current input into alternating current and supplies it to the load device 32.
The electric vehicle drive device 4 shown in FIG. 1 (d) includes a variable voltage variable frequency inverter 41 including a switch SW2, a reactor L2, a capacitor C2, and an inverter 41a, and a drive motor 42 for a three-phase induction motor. The voltage variable frequency inverter 41 receives direct current as an input and outputs alternating current for variable speed driving of the driving motor 42.

  The operation of the electric vehicle in the main circuit configuration to which the present invention is applied will be described. When accelerating the electric vehicle, DC power is supplied to the electric vehicle driving device 4 to drive the driving motor 42, and when the electric vehicle is decelerated, the electric power converted from the running energy by the driving motor 42 is used. Brake force is generated in the drive motor 42 by taking out and consuming DC power from the electric vehicle drive device. On the other hand, DC power is constantly supplied to the auxiliary power supply device 3 to operate the indoor lamp and the air conditioning unit regardless of the running state of the electric vehicle.

  When accelerating the electric vehicle, the circuit configuration shown in FIG. 3 is adopted, and the switches 5 and 7 are closed and the power collected by the current collector 1 is supplied to the auxiliary power supply device 3 and the electric vehicle drive device 4. When the electric vehicle finishes accelerating, the switch 7 is opened and the switch 6 is closed to obtain the circuit configuration shown in FIG. Thereafter, when the electric vehicle is decelerated, the DC power generated from the electric vehicle driving device 4 is supplied to the power storage device 2 through the switch 6, and is consumed by being stored as chemical energy in the DC secondary battery of the power storage device 2. The When the electric power generated by the electric vehicle drive device 4 is accumulated in the power storage device 2, a braking force is generated in the drive motor 42 of the electric vehicle drive device 4 to decelerate the electric vehicle. During this operation, since the auxiliary power supply 3 and the current collector 1 are always connected by the switch 5, the power supply to the auxiliary power supply does not stop.

  When accelerating the electric vehicle, the circuit configuration shown in FIG. 2 may be employed. This circuit configuration is used when the electric power stored in the power storage device 2 is supplied to the electric vehicle drive device 4 and reused. In this case, the electric vehicle driving device 4 uses the electric power supplied from the power storage device 2 through the switch 6 to accelerate the electric vehicle. At this time, the auxiliary power supply 3 is supplied with power from the current collector 1 through the switch 5. Therefore, after the electric power from the electric vehicle drive device 4 is accumulated in the power storage device 2, the auxiliary power supply device 3 always keeps the power from the current collector 1 while the power from the power storage device 2 is reused by the electric vehicle drive device 4. Therefore, the room lights and the air conditioning units do not stop.

  The electric vehicle to which the present invention is applied may have the circuit configuration shown in FIG. In this case, the switch 5 is opened, the switches 6 and 7 are closed, and the electric power of the power storage device 2 is supplied to the auxiliary power supply device 3 and the electric vehicle drive device 4. In this circuit configuration, the electric vehicle can be operated without using the train line within the capacity of the stored power of the power storage device 2.

  In the configuration of FIG. 1, the object of the present invention can also be achieved in a configuration in which the first switch, the second switch, and the third switch are replaced with circuit breakers as necessary.

  In the configuration of FIG. 1, the object of the present invention can be achieved even if the first switch and the second switch are replaced with a configuration in which the circuit breaker and the switch are connected in series as necessary.

  INDUSTRIAL APPLICABILITY The present invention can be used for an electric vehicle that includes a power storage device and can accumulate generated electric power during braking.

DESCRIPTION OF SYMBOLS 1 Current collector 2 Power storage device 3 Auxiliary power supply device 4 Electric vehicle drive device 5 Switch 6 Switch 7 Switch

Claims (3)

In an electric vehicle including a current collector, a power storage device, an auxiliary power supply device, and an electric vehicle driving device,
A first switch connected in series to the current collector, the auxiliary power supply connected to the current collector via the first switch, and a first switch connected in series to the power storage device. 2 switch, the electric vehicle drive device connected to the power storage device via the second switch, a connection point between the first switch and the auxiliary power supply device, and the second switch An electric vehicle circuit system comprising a third switch for connecting between a connection point between the electric device and the electric vehicle drive device. 2. The electric vehicle circuit system according to claim 1, wherein all or one of the first switch, the second switch, and the third switch is a circuit breaker. 3. The electric vehicle circuit system according to claim 2, wherein the first switch and the second switch or both of them are a circuit breaker and a switch connected in series.

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