Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1996-12-30
1999-03-09
Ro, Bentsu
Electricity: motive power systems
Induction motor systems
Primary circuit control
318139, H02P 541, B60L 1508
Patent
active
058805745
ABSTRACT:
In an electric vehicle in which a motor is driven using the electric power of a battery, and a PWM controller controls an inverter mounted between the battery and the motor. The frequency of the PWM control means is usually set higher than an audio frequency, in order to decrease the switching noise of the inverter. Motor operational state detecting devices detect when the motor is at low speed and high-load operational state, and if there is a possibility that switching elements of the inverter may be over-heated, the frequency of the PWM controller is decreased by a frequency changing device, thereby preventing damage to the switching elements of the inverter due to the over-heating.
REFERENCES:
patent: 4461988 (1984-07-01), Plunkett
patent: 4900992 (1990-02-01), Sekizawa et al.
patent: 5287051 (1994-02-01), Konrad et al.
Anraku Fumio
Ito Hisahiro
Ohnuki Yasumichi
Otsuka Kazuo
Shinohara Sadao
Honda Giken Kogyo Kabushiki Kaisha
Ro Bentsu
LandOfFree
Control system for electric vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control system for electric vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for electric vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1324712