Abstract: Described is a method that includes receiving a reference signal including an adjustable-amplitude sine wave. The method also includes receiving a voltage feedback signal from a voltage control loop. The voltage feedback signal is a point-of-regulation sine wave, and the voltage control loop includes a first response time. The method also includes comparing the reference signal to the voltage feedback signal to generate an error value. Further, the point-of-regulation sine wave is controlled in the method based on a proportional-integral-derivative input and a current feedback signal. The proportional-integral-derivative input is based on the error value. Additionally, the method includes adjusting the reference signal based on an output of an amplitude control loop. The amplitude control loop includes a second response time that is at least one order of magnitude slower than the first response time of the voltage control loop.

Abstract: Described is a method that includes receiving a reference signal including an adjustable-amplitude sine wave. The method also includes receiving a voltage feedback signal from a voltage control loop. The voltage feedback signal is a point-of-regulation sine wave, and the voltage control loop includes a first response time. The method also includes comparing the reference signal to the voltage feedback signal to generate an error value. Further, the point-of-regulation sine wave is controlled in the method based on a proportional-integral-derivative input and a current feedback signal. The proportional-integral-derivative input is based on the error value. Additionally, the method includes adjusting the reference signal based on an output of an amplitude control loop. The amplitude control loop includes a second response time that is at least one order of magnitude slower than the first response time of the voltage control loop.