US 5,350,990 AGranted

Circuit arrangement for commutating a reluctance motor

AssigneeU.S. Philips Corporation

InventorsRalf Austermann, Heinz van der Broeck

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Abstract

A circuit arrangement for commutating a reluctance motor including a current generator which produces first and second cyclic sequences of current pulses. In response to the first cyclic sequence applied to the stator windings of the motor, a rotor travels a predetermined distance along a motion coordinate path. Application of the second sequence to the stator windings results in the rotor traveling at least twice the predetermined distance along the motion coordinate path. The second sequence, which is applied when rotor speed exceeds a predetermined level, is formed by omitting predetermined current pulses from the first cyclic sequence.

Claims16

Dependent claims

A circuit arrangement for commutating a reluctance motor having a stator and a rotor, the rotor traveling along a motion coordinate path relative to the stator, comprising:

a plurality of stator windings;
and
current generating means for producing a first cyclic sequence of current pulses resulting in the rotor traveling a predetermined distance along the motion coordinate path and for producing a second cyclic sequence of current pulses resulting in the rotor traveling at least approximately twice the predetermined distance along the motion coordinate path, said stator windings being supplied with said second cyclic sequence of current pulses when rotor speed exceeds a predetermined level;
wherein said second cyclic sequence of current pulses is formed by omitting predetermined current pulses from said first cyclic sequence.

1 more element

Dependencies are inferred from the claim text.