Title:
CONTROL DEVICE FOR ELECTRIC MOTOR VEHICLE
Document Type and Number:
Japanese Patent JP3200346
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent damage due to overheat of a switching element of an inverter, when a motor of an electric motor vehicle is placed in a low speed high load operating condition.
SOLUTION: In driving of a motor 1 with power of a battery 3 by PWM- controlling an inverter 6, provided between the battery 3 and the motor 1, by a PWM control means 25, ordinarily in order to reduce switching noise of the inverter 6, a frequency of the PWM control means 25 is set higher than an audio frequency. A motor operating condition detection means 26 detects the motor 1 placed in a low speed high load operating condition, in the case of providing possibility overheating a switching element of the inverter 6, the frequency of the PWM control means 25 is decreased by a frequency change means 27, so as to prevent damage due to overheat of the switching element of the inverter 6.
Inventors:
Kazuo Ohtsuka
Toshihiro Ito
Sadao Shinohara
Onuki Taido
Fumio Anraku
Shinji Yoshikawa
Toshihiro Ito
Sadao Shinohara
Onuki Taido
Fumio Anraku
Shinji Yoshikawa
Application Number:
JP35382995A
Publication Date:
August 20, 2001
Filing Date:
December 29, 1995
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
H02H7/00; B60L3/00; B60L11/18; B60L15/08; B60L15/28; H02H7/12; H02M7/48; H02P27/06; H02P27/08; (IPC1-7): B60L15/28; H02H7/00; H02H7/12; H02M7/48; H02P5/41; H02P7/63
Domestic Patent References:
| JP6141402A | ||||
| JP530602A | ||||
| JP7222478A |
Attorney, Agent or Firm:
Ken Ochiai (1 person outside)