ELECTRIC VEHICLE CONTROL DEVICE

• US 20120249032A1
• Filed: 10/18/2011
• Published: 10/04/2012
• Est. Priority Date: 03/31/2010
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Toda, Shinichi, Yasuoka, Ikuo, Nakazawa, Yosuke
• Granted Patent: US 8,890,455 B2
• Time in Patent Office: Days
• US Class Current: 318/400.27
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/525 Temperature of converter or components thereof
• CPC Class Codes: B60L 3/003 relating to inverters
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 9/16 using ac induction motors
• CPC Class Codes: H01L 25/18 the devices being of types provided for in two or more different subgroups of the same main group of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H02P 3/24 by applying dc to the motor
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

Disclosed herein are electric vehicle control device which can distribute the heat generated by the semiconductor devices in the DC/AC converter efficiently. Also disclosed herein are methods of converting DC to AC while keeping the heat value of the semiconductor devices stable.

Claims

1. An electric vehicle control device comprising:

an inverter package comprising,

a plurality of inverters,

a first semiconductor device package, and

a cooling radiator,

wherein the inverter package is configured to transform DC voltage to AC voltage, to supply AC voltage to a motor by switching a semiconductor device for controlling motor speed;

wherein the first semiconductor device package comprises at least two semiconductor devices;

wherein the cooling radiator is connected to the first semiconductor device package to cool the first semiconductor device package.

2. The electric vehicle control device of claim 1, wherein the at least two semiconductor devices are the same phase and are configured to switch the first semiconductor device package ON/OFF.

3. The electric vehicle control device of claim 1, wherein the inverter package further comprises a second semiconductor device package and a third semiconductor device package, wherein,

the first semiconductor device package comprises a first semiconductor device comprising an U phase upper arm, and a V phase lower arm;

the second semiconductor device package comprises a second semiconductor device comprising a V phase upper arm, and a V phase lower arm;

the third semiconductor device package comprises a third semiconductor device comprising a W phase upper arm, and a V phase lower arm.

4. The electric vehicle control device of claim 1, further comprising:

a filter reactor configured to rectify a wire electric power supplied from a wire in the plurality of inverters;

a direct-current circuit for excess voltage control configured to discharge the wire electric power if the wire electric power is supplied by a capacity used as the breakdown of the plurality of inverters.

5. The electric vehicle control device of claim 1 wherein the first semiconductor device package is located near the cooling radiator so that a heat from the first semiconductor device package is equally spread to the cooling radiator.

6. The electric vehicle control device of claim 1, further comprising a motor drive system for electric vehicles.

7. An electrical motor system comprising:

a permanent magnet synchronous motor; and

an inverter unit comprising

a heat sink comprising a heat-receiving board, and

a plurality of variable voltage variable frequency inverters connected to the heat-receiving board;

wherein each of the variable voltage variable frequency inverters comprises,

a U phase semiconductor device package,

a V phase semiconductor device package,

a W phase semiconductor device package

wherein each of the semiconductor device packages comprises a plurality of semiconductor devices; and

wherein heat generated by each of the semiconductor devices is configured to be distributed equally to the cooler.

8. The device of claim 7, further comprising:

a direct current circuit comprising,

a filter reactor,

an excess voltage control resistor,

a switch; and

an alternating current circuit comprising,

a direct current voltage sensor,

a motor opening contact, and

a current sensor; and

an excess voltage control circuit comprising a resistor and switch.

9. The device of claim 8, wherein the direct current circuit further comprises:

a current collector;

a high speed circuit breaker;

a short circuit contact machine configured to change a resistance;

a charge resistor; and

an open contact.

10. The device of claim 8, wherein alternating current circuit is disposed on the inverter unit.

11. A method of transforming DC current to AC current to operate an electrical vehicle, the method comprising:

receiving a direct current to an inverter package comprising a semiconductor device comprising a right side element and a negative side element;

switching the semiconductor device between the right side element and the negative side element to transform the DC current to an AC current;

supplying the AC current to a plurality of permanent magnet synchronous motors;

wherein a heat value of the semiconductor devices is fixed by switching between the right side element and the negative side element alternatively.