Electric motor control system

Details Electric motor control system Electric motor control system

1992-03-03

1994-11-29

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

388811, 388903, 361 23, 180 791, H02P 528

Patent

active

053693493

ABSTRACT:
An electric motor control system has a motor driver comprising a bridge of switching elements, a pair of failure detectors, and a microcomputer. The motor driver is connected between a battery and an electric motor that is connected between the switching elements. The switching elements are turned on and off according to drive pulse signals supplied from the microcomputer for supplying a pulsed current to the electric motor. The failure detectors monitor the electric energy supplied to the electric motor to detect a period of time in which the supplied electric energy is free of pulses, and supply a signal indicative of the detected period of time to the microcomputer. Based on the signal from the failure detectors, the microcomputer detects a failure when the detected period of time exceeds a predetermined period of time.

REFERENCES:
patent: 4532567 (1985-07-01), Koda
patent: 4611682 (1986-08-01), Yasuda et al.
patent: 4945298 (1990-07-01), Nakashima
patent: 4972133 (1990-11-01), Hirota et al.
patent: 5081404 (1992-01-01), Kelley et al.

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