Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1997-11-10
1999-11-23
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318799, 318432, 318433, H02K 2300
Patent
active
059906413
ABSTRACT:
A motor control device controls an electric 3-phase brushless d.c. motor (10) having a magnetic rotor (15) and three windings (11, 12, 13). The motor control device includes a detection unit (20) adapted to generate a commutation signal (21) on the basis of the back-emf voltage produced in the windings (11, 12 and 13). The motor control device further includes an output stage (30) having a first terminal (31) and a second terminal (32) for the connection of a power-supply source, outputs (33, 34, 35) for the connection of the windings (11, 12 and 13) and a number of semiconductor elements (36) for selectively coupling the terminals (31, 32) to the outputs (33, 34, 35) in dependence upon the commutation signal (21). The motor control device further includes a phase detector (40) adapted to generate a phase-error signal (43) which is representative of the phase difference between a sensor signal and a reference signal. The output stage (30) is arranged in series with a controllable power-supply stage (50) adapted to feed a bidirectional current (I) through the windings (11, 12, 13) via the outputs (33, 34, 35). The current (I) is controlled in dependence upon the phase-error signal (43) for driving the rotor (15) in a controlled manner, or for actively braking said rotor.
REFERENCES:
patent: 4250435 (1981-02-01), Alley et al.
patent: 4752724 (1988-06-01), Radziwill et al.
patent: 5223771 (1993-06-01), Chari
patent: 5572099 (1996-11-01), Carobolante
Buthker Henricus C. J.
Damstra Nicolaas J.
Van Beijsterveld Gerardus A. M.
Van Buul Marinus C. W.
Goodman Edward W.
Leykin Rita
Shoop Jr. William M.
U.S. Philips Corporation
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