Method and regulator based on peak current control for electric machines

摘要

Method for providing current regulation and current regulator for a power converter-driven electric machine are provided. The regulator includes a comparator coupled to receive a measurement of phase current from the machine and a reference phase current. The comparator is configured to provide an output signal indicative of whether or not the level of the measured phase current is below the reference phase current. The regulator further includes a circuit with memory of its respective circuit states, such as a flip-flop circuit. The circuit is coupled to the comparator to receive the output signal from the comparator. The circuit is further responsive to a stream of pulses having a generally fixed frequency to supply a switching signal synchronized with the stream of pulses. The switching signal may be applied to a gate terminal of a power switch of the power converter to selectively energize and de-energize the power switch so that the peak value of the measured phase current substantially corresponds with the value of the reference current.