Position controller for controlling an electric motor

Details Position controller for controlling an electric motor Position controller for controlling an electric motor

1993-04-07

1995-06-27

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318560, 318618, H02P 528

Patent

active

054282853

ABSTRACT:
A position controller for controlling an electric motor comprises first position control circuit which provides first speed signal, second position control circuit which controls a mechanical system simulating circuit and provides second speed signal, an adder which adds the first and second speed signals to provide third speed control signal, first speed control circuit which receives the third speed signal and provides first torque signal, second speed control circuit which provides second torque signal, third speed control circuit which provides third torque signal, and an adder which adds the first, second and third torque signals to provide final torque signal. The output torque of the electric motor is controlled so that the output torque coincides with a torque represented by the final torque signal. The position controller has high-speed response characteristics, is capable of suppressing mechanical vibrations and maintains a constant response frequency even if the moment of inertia of a load machine driven by the electric motor varies.

REFERENCES:
patent: 4792737 (1988-12-01), Goff et al.
patent: 5175483 (1992-12-01), Fujii et al.
patent: 5235262 (1993-08-01), Takeuchi et al.
W. Schumacher et al., "Transistor-Fed AC-Servo Drive with Microprocessor Control", IPEC, Tokyo 1983, pp. 1465-1476.

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