Control of an inductive load

Details Control of an inductive load Control of an inductive load

1994-07-13

1996-06-25

Shoop, Jr., William M.

Electricity: motive power systems

Synchronous motor systems

Hysteresis or reluctance motor systems

318254, 318138, 318439, H02P 146

Patent

active

055303331

ABSTRACT:
A switched reluctance motor controller derives an error signal from the difference between a phase winding current reference and the phase winding current. The error signal is applied to a pair of hysteresis circuits which define adjacent hysteresis bands above and below the reference current. The outputs of the hysteresis circuits are received by control logic which permits current to be applied to the phase winding when the current is below the hysteresis bands, removes current from the phase winding when the current is above the hysteresis bands and allows the phase winding current to freewheel when the current is between the upper and lower hysteresis limits.

REFERENCES:
patent: 4339703 (1982-07-01), Rolffe et al.
patent: 4710815 (1987-12-01), Douglas et al.
patent: 4713594 (1987-12-01), Bose et al.
patent: 4933621 (1990-06-01), MacMinn et al.
patent: 5166591 (1992-11-01), Stephens et al.

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