Control system for electric vehicle

Details Control system for electric vehicle Control system for electric vehicle

1996-07-03

1998-09-15

Ro, Bentsu

Electricity: motive power systems

Battery-fed motor systems

340636, 320 43, B60L 300, B60L 1500

Patent

active

058084282

ABSTRACT:
When the voltage of a battery is dropped down to a first threshold value (9.5 V) or less, the driving force of a motor is decreased to a level Y(0)-Y(7) of a limit power determined in accordance with a remaining capacity of the battery. When the voltage is not restored even after a predetermined time is lapsed from the decreasing of the driving force to the level Y(0)-Y(7), the driving force is further decreased down to a lower level Y(0)-Y(7). When the voltage of the battery is restored to a second threshold value (10 V), the driving force of the motor is gradually increased up to a level Z(0)-Z(7) of a limit power determined in accordance with the capacity of the battery. Thus, it is possible to prevent a deep discharging of the battery, while minimizing the influence on the traveling of the vehicle.

REFERENCES:
patent: 3568175 (1971-03-01), Schwehr et al.
patent: 4394741 (1983-07-01), Lowndes
patent: 5119011 (1992-06-01), Lambert
patent: 5367455 (1994-11-01), Kitagawa et al.

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