Drive apparatus for brushless DC motor and failure diagnosing me

Details Drive apparatus for brushless DC motor and failure diagnosing me Drive apparatus for brushless DC motor and failure diagnosing me

1994-03-17

1995-08-29

Shoop, Jr., William M.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318807, 318798, 318782, H01R 3946

Patent

active

054463548

ABSTRACT:
When power is sequentially supplied to the phase coils of a brushless DC motor, the rotor of the brushless DC motor is rotated. At this time, a voltage is induced in one of the phase coils to which power is not supplied. The rotational position of the rotor is detected from the induced voltage. The switching timing of power supply to the phase coils is determined in accordance with the detected rotational position. When a service operation mode switch is operated, a service operation is executed, and power supply to the respective phase coils is forcibly switched at a predetermined frequency. A failure can be diagnosed during this service operation.

REFERENCES:
patent: 4099109 (1978-07-01), Abbondanti
patent: 4856286 (1989-08-01), Sulfstede et al.
patent: 4939437 (1990-07-01), Farag et al.
patent: 5047704 (1991-09-01), Yamauchi
patent: 5117165 (1992-05-01), Cassat et al.
patent: 5187417 (1993-02-01), Minnich et al.
patent: 5296785 (1994-03-01), Miller

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