Method for controlling brushless d.c. motors and apparatus for c

Details Method for controlling brushless d.c. motors and apparatus for c Method for controlling brushless d.c. motors and apparatus for c

1987-06-09

1988-07-26

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318434, 318599, H02P 602, H02P 517

Patent

active

047603160

ABSTRACT:
The invention relates to a method for controlling brushless d.c. motors and to a system for controlling such motors, by varying the effective value of current pulses to the phase windings. According to the invention, upon detection of a maximum current state, the effective value of the pulses is decreased by shortening pulses from a given time point within the normally remaining part of the pulses, irrespective of whether the maximum current state ceases during the time that this part of the pulses should have occurred or not. This time point may coincide substantially with the time point at which the state of maximum current was detected or may coincide substantially with the later time point at which the duration of respective pulses exceeds a predetermined minimum value. The next pulse is introduced at the same time point at which it should normally have been introduced.

REFERENCES:
patent: 4527102 (1985-07-01), Gotou
patent: 4631458 (1986-12-01), Furuichi
patent: 4692674 (1987-09-01), Packard et al.
"Inverter Device for Switched Reluctance Motor: Circuits and Component Ratings", IEE Proc., vol. 128, Pt. B., No. 2, By R. M. Davis et al., Mar. 1981, pp. 126-136.
"Linear Integrated Circuits", Unitrode, UC3620 Series.

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