Title:
CONTROL DEVICE OF ELECTRIC AUTOMOBILE
Document Type and Number:
Japanese Patent JP3179046
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To easily tow an automobile backward by a human power.
SOLUTION: A control device of an electric automobile has an acceleration output circuit 18 for generating output according to the opening of an accelerator and a chopper circuit 14 for changing the conduction rate of the motor current of an electric motor 13 that is connected to a power supply according to input from the acceleration output circuit 18. In the control device, a relay 12 that is switched being linked to a main switch 15 is connected in series with the electric motor 13 and further a flywheel diode 16 is connected in parallel with the series circuit between the electric motor 13 and the relay 12. In this manner, when the electric automobile advances, the contact of the relay 12 is closed and the conduction rate of the motor current of the electric motor is changed by a chopper circuit 14 for driving. Also, when the electric automobile is towed toward the rear by a human power, the contact of the relay 12 opens. Even if the automobile is towed by a human power, a power generated by the electric motor does not flow back via the flywheel diode 16 so that no electrical damping is performed, thus easily towing the electric automobile by a human power.
Inventors:
Mitsuo Fukaya
Application Number:
JP10221997A
Publication Date:
June 25, 2001
Filing Date:
April 18, 1997
Export Citation:
Assignee:
YAMAHA HATSUDOKI KABUSHIKI KAISHA
International Classes:
B60L7/04; B60L15/20; (IPC1-7): B60L7/04; B60L15/20
Domestic Patent References:
| JP5944101U |
Other References:
【文献】チョッパ制御方式専門委員会編、「チョッパ制御ハンドブック」、電気学会、昭和51年6月15日発行 第63頁第15行乃至第29行
Attorney, Agent or Firm:
Toshio Tsuruwaka