Traction motor control system

Details Traction motor control system Traction motor control system

2007-06-26

2007-06-26

Masih, Karen (Department: 2837)

Electricity: motive power systems

Battery-fed motor systems

C318S635000, C318S806000, C318S432000, C318S504000

Reexamination Certificate

active

11218489

ABSTRACT:
For controlling a traction motor of a vehicle, a current command value is determined based on a torque command and a load value representative of running load of the vehicle. A voltage command value is calculated in such a manner that a difference between the current command value and the actual current of the motor is converged to zero. An allowable range is determined for the voltage command value based on the load value and physical quantity associated with an operating condition of the motor. The voltage command value is compared with the lower and upper limits of the allowable range. A safeguard is set on the voltage command value when the latter is becoming smaller than the lower limit or greater than the upper limit. Preferably, the current command value is scaled down or scaled up depending on the voltage command value relative to the allowable range.

REFERENCES:
patent: 6175252 (2001-01-01), Yamada
patent: 6747855 (2004-06-01), Kumar et al.
patent: A 2003-9573 (2003-01-01), None
U.S. Appl. No. 11/146,155, filed Jun. 7, 2005, Takai et al.

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