Title:
POWER SUPPLY IN ELECTRIC VEHICLE
Document Type and Number:
Japanese Patent JP3431537
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a two-source power supply in an electric vehicle for carrying out rapid charge of a low-voltage battery in a simple constitution.
SOLUTION: When a shortage in charging is caused for a low-voltage battery 2 for feeding power to accessories (including a control unit) in a power supply in an electric vehicle, the low-voltage battery 2 is charged with power from a high-voltage battery 1 for feeding a running motor through a DC-DC converter 3. In an inverter circuit 4 of the DC-DC converter 3, not only a single-phase AC voltage with a given frequency (any one of harmonic and rectangular waveforms) is generated, but a duty ratio is adjusted under PWM control so that an output current of a semiconductor switching element in the inverter circuit 4 becomes a given value of an allowable maximum current value minus a temperature influence offset current value that is linked with temperatures of the semiconductor switching element.
Inventors:
Tatsuya Machi
Go Yamashita
Go Yamashita
Application Number:
JP15140099A
Publication Date:
July 28, 2003
Filing Date:
May 31, 1999
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H02J7/00; B60K6/20; B60K6/28; B60L1/00; B60W10/26; B60W10/30; B60W20/00; H01M10/42; H02J7/10; H02M3/28; H02M3/335; (IPC1-7): B60L1/00; B60K6/02; H01M10/42; H02J7/00; H02J7/10; H02M3/28; H02M3/335
Domestic Patent References:
| JP965509A | ||||
| JP6363046U |
Attorney, Agent or Firm:
Hiroshi Ohkawa