Electric vehicle propulsion control device and railway vehicle system

Patent metadata

Field	Value
Publication number	US-9227516-B2
Application number	US-201113810799-A
Country	US
Kind code	B2
Filing date	Apr 21, 2011
Priority date	Jul 30, 2010
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

An electric vehicle propulsion control device having a power storage device includes: a first switch configured to perform opening and closing of a circuit between an overhead wire and a power converting unit; a second switch configured to perform opening and closing of a circuit between the power converting unit and a motor; a switching unit configured to select a terminal on a side of the power converting unit to which the first switch is connected or a terminal on a side of the power converting unit to which the second switch is connected and connect the terminal to the power storage device; and a control unit configured to control the power converting unit, the first switch, the second switch, and the switching unit to switch a connection destination of the power converting unit and cause the power converting unit to operate as an inverter or a DC/DC converter.

First claim

The invention claimed is:

1. An electric vehicle propulsion control device including a power storage device, the electric vehicle propulsion control device comprising:
a power converting unit capable of performing bidirectional power flow control and configured to convert, when direct-current power from the power storage device is input from a first terminal side, the direct-current power into desired alternating-current power and output the alternating-current power from a second terminal side, convert, when direct-current power from a direct-current power supply source excluding the power storage device is input from the first terminal side, the direct-current power into desired direct-current power or alternating-current power and output the direct-current power or the alternating-current power from the second terminal side, and convert, when the direct-current power from the direct-current power supply source is input from the second terminal side, the direct-current power into desired direct-current power and output the direct-current power from the first terminal side; and
a control unit configured to control an operation of the power converting unit, wherein
when converting the direct-current power from the power storage device input from the first terminal side into desired alternating-current power and outputting the alternating-current power from the second terminal side, the control unit causes the power converting unit to operate as an inverter,
when converting the direct-current power from the direct-current power supply source input from the first terminal side into desired direct-current power and outputting the direct-current power from the second terminal side, the control unit causes the power converting unit to operate as a step-down chopper,
when converting the direct-current power from the direct-current power supply source input from the first terminal side into desired alternating-current power and outputting the alternating-current power from the second terminal side, the control unit causes the power converting unit to operate as the inverter, and
when converting the direct-current power from the direct-current power supply source input from the second terminal side into desired direct-current power and outputting the direct-current power from the first terminal side, the control unit causes the power converting unit to operate as a step-up chopper.

2. The electric vehicle propulsion control device according to claim 1 , wherein
a reactor is provided on the second terminal side of the power converting unit,
when a voltage of the direct-current power supply source is higher than a stored voltage of the power storage device, the control unit causes the direct-current supply source to input the direct-current power of the direct-current power supply source to the power converting unit from the first terminal side, and
the power converting unit charges the power storage device using direct-current power output the second terminal side via the reactor.

3. The electric vehicle propulsion control device according to claim 1 , wherein
a reactor is provided on the second terminal side of the power converting unit,
when a voltage of the direct-current power supply source is lower than the stored voltage of the power storage device, the control unit causes the direct-current supply source to input the direct-current power of the direct-current power supply source to the power converting unit from the second terminal side via the reactor, and
the power converting unit charges the power storage device using direct-current power output from the first terminal side.

4. The electric vehicle propulsion control device according to claim 1 , wherein
when the direct-current power of the power storage device is used as power for the electric vehicle, the control unit causes the power storage device to input the direct-current power of the power storage device to the power converting unit from the first terminal side, and
the power converting unit drives the electric vehicle using alternating-current power output from the second terminal side.

5. The electric vehicle propulsion control device according to claim 1 , wherein
when the direct-current power of the direct-current power supply source is used as power for the electric vehicle, the control unit causes the direct-current power supply source to input the direct-current power of the direct-current power supply source to the power converting unit from the first terminal side, and
the power converting unit drives the electric vehicle using alternating-current power output from the second terminal side.

6. The electric vehicle propulsion control device according to claim 1 , wherein
when alternating-current power from an alternating-current power supply source is input from the second terminal side, the power converting unit converts the alternating-current power into direct-current power and outputs the direct-current power from the first terminal side, and
when converting the alternating-current power from the alternating-current power supply source input from the second terminal side into desired direct-current power and outputting the direct-current power from the first terminal side, the control unit cause the power converting unit to operate as a converter.

7. The electric vehicle propulsion control device according to claim 6 , wherein
when charging the power storage device using the alternating-current power of the alternating-current power supply source, the control unit causes the alternating-current power supply source to input the alternating-current power of the alternating-current power supply source to the power converting unit from the second terminal side, and
the power converting unit charges the power storage device using direct-current power output from the first terminal side.

8. The electric vehicle propulsion control device according to claim 6 , wherein
when the electric vehicle propulsion control device includes at least an alternating-current generator as the alternating-current power supply source,
when starting an engine, which is a power source of the alternating-current generator, using the direct-current power of the power storage device, the control unit causes the power storage device to input the direct-current power of the power storage device to the power converting unit from the first terminal side and drives the alternating-current generator using alternating-current power output from the second terminal side to start the engine.

9. The electric vehicle propulsion control device according to claim 6 , wherein
when the electric vehicle propulsion control device includes at least an alternating-current generator as the alternating-current power supply source,
when starting an engine, which is a power source of the alternating-current generator, using the direct-current power of the direct-current power supply source, the control unit causes the direct-current power supply source to input the direct-current power of the direct-current power supply source to the power converting unit from the first terminal side and drives the alternating-current generator using alternating-current power output from the second terminal side to start the engine.

10. The electric vehicle propulsion control device according to claim 6 , wherein
when the electric vehicle propulsion control device includes at least an alternating-current overhead wire as the alternating-current power supply source,
when supplying electric power of the direct-current power supply source to the alternating-current overhead wire, the control unit causes the direct-current power supply source to input the direct-current power of the direct-curr

Assignees

• Hatanaka Keita
• Mitsubishi Electric Corp

Inventors

• Hatanaka Keita

Classifications

• B60L9/22

  polyphase motors · CPC title

• Y02T10/7072

  Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors · CPC title

• B60L53/24

  Using the vehicle's propulsion converter for charging · CPC title

• B60L9/24

  fed from AC supply lines · CPC title

• Y02T90/12

  Electric charging stations · CPC title