Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1983-01-26
1984-09-25
Truhe, J. V.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318434, 318439, H02P 602
Patent
active
044737823
ABSTRACT:
A drive circuit for brushless direct-current motors having a cylinder-like air gap between a permanent magnetic inner or outer rotor and a stator, the stator windings being connected to a supply direct-current source in series with a respective feed transistor. The current flux depends on position signals from a semiconductor control element determining the rotor position, in particular a Hall IC, and on the switching state of a semiconductor switch responding to blocking of the rotor and serving as blocking protection for the stator windings. In order to avoid a thermal overload of the stator windings and of the semiconductor elements contained in the circuit, the semiconductor switch provided as the blocking protection is a transistor. The emitter/collector path of the blocking protection transistor is in series with the stator windings and the feed transistors associated with each of these stator windings, and the base of the blocking protection transistor receives an inductive voltage generated in the stator windings.
REFERENCES:
patent: 3644808 (1972-02-01), Favre
patent: 3716769 (1973-02-01), Brunner
patent: 4132930 (1979-01-01), Schalk
Lipp Helmut
Reinhardt Wilhelm
Rudele Friedrich O. U.
ebm Elektrobau Mulfingen GmbH & Co.
Ro Bentsu
Truhe J. V.
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