Control systems for variable reluctance electrical machines.

摘要

In a control system for a reluctance motor (23) driving a load (24), the output of a reference waveform generator (27) is applied to a power converter (29) through a current controller (28). The output of generator (27) is determined by rotor position, as detected by a sensor (25). Generator (27) establishes a relative magnitude for motor phase current for every position of the rotor during the period of energisation of a motor phase. A further control input may determine the absolute magnitude of the motor phase current, subject to the waveform pattern established by generator (27). The reference waveforms may be sinusoidal. A method of determining the configuration of suitable reference waveforms for a given motor involves monitoring selected parameters of motor operation while controlling other such parameters in a test procedure.