Electric vehicle torque controller

Details Electric vehicle torque controller Electric vehicle torque controller

1995-04-20

1997-07-22

Martin, David S.

Electricity: motive power systems

Constant motor current, load and/or torque control

318802, 318811, H02P 700

Patent

active

056507003

ABSTRACT:
An electric vehicle torque controller has a torque calculating unit and an actual torque detecting unit. The calculated torque is compared with the actual torque to generate a torque compensation value, which is converted to a torque current signal. The torque current signal is used to generate a slip frequency, which is added to an output of an angular speed detector and used to set a secondary magnetic flux value. A secondary magnetic flux signal is generated according to the secondary magnetic flux value and the torque current signal. A secondary magnetic flux estimating unit generates an estimated secondary magnetic flux value, which is used to determine the exciting current. Primary motor current is controlled in response to the exciting current, the torque current, motor speed and slip value.

REFERENCES:
patent: 4041361 (1977-08-01), Cornell
patent: 4450398 (1984-05-01), Bose
patent: 4567419 (1986-01-01), Watanbe
patent: 4672288 (1987-06-01), Abbondanti
patent: 4815567 (1989-03-01), Ikejima
patent: 4870334 (1989-09-01), Iwasa et al.
patent: 5047704 (1991-09-01), Yamauchi
patent: 5481168 (1996-01-01), Mutoh et al.

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