Power regulator employing a sinusoidal reference

摘要

A power regulator for use with an AC power source includes a voltage converter having a first input and a second input. The first input is connected with the AC power source and receives AC current therefrom. The second input is connected to a controller and receives a control signal therefrom. The voltage converter generates a substantially sinusoidal regulator output signal, the amplitude of which is responsive to the control signal. The power regulator also includes a controller having a first input and a second input. The first input receives the regulator output signal and the second input receives a set point signal. The set point signal determines the amplitude of a substantially sinusoidal reference signal which is substantially in-phase with the regulator output signal. The controller generates the control signal indicative of the instantaneous difference between the regulator output signal and the amplitude of the substantially sinusoidal reference signal. The amplitude of the substantially sinusoidal reference signal is independent of the amplitude of the AC power source and the amplitude of the regulator output signal.