Variable speed drive system

摘要

This disclosure relates to a variable speed drive for driving a single phase motor. The variable speed drive generates enhanced motor voltages including harmonic components configured to reduce torque pulsations.

主权项

1. A system for driving a load, the system comprising:
a processing unit generating a control voltage Vhew(t) from a fundamental sinusoidal component and a harmonic component, the harmonic component being odd numbered; and a pulse-width-modulation (PWM) controller receiving the control voltage Vhew(t) and converting the control voltage Vhew(t) to a driving voltage configured to drive a single phase motor, the driving voltage being a PWM voltage, wherein the control voltage Vhew(t) is configured to maintain a voltage crest factor of the driving voltage at or below about 1.4 and a current crest factor of the driving voltage at or below about 1.9.