Brushless D.C. motor having a predefined minimum time lapse betw

Details Brushless D.C. motor having a predefined minimum time lapse betw Brushless D.C. motor having a predefined minimum time lapse betw

1996-05-20

1997-10-28

Cabeca, John W.

Electricity: motive power systems

Switched reluctance motor commutation control

318452, 318138, H02H 708

Patent

active

056820887

ABSTRACT:
In a D.C. motor having a position detector for detecting predetermined rotor positions and an electronic commutation circuit for connecting the stator coils to the power supply in a predefined cyclic order (and for disconnecting them) in dependence upon detected predetermined rotor positions, the no-load speed is limited by delaying the connection of a next stator coil in response to a new detection of a next one of the predetermined rotor positions, until a predetermined delay period has elapsed after a previous detection of another rotor position that lies a predetermined distance ahead of the newly detected rotor position.

REFERENCES:
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patent: 4951219 (1990-08-01), Zimmer
patent: 5057753 (1991-10-01), Leuthold et al.
patent: 5285135 (1994-02-01), Carobolante et al.
patent: 5289135 (1994-02-01), Hoshino et al.

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