Patent ID: 7859872

Claim:
A method of controlling the power output of a converter having a single phase AC input and a single phase DC output, the single phase DC output controlled by at least one power conversion switch device connected to the converter's DC power bus, the method comprising the steps of: generating a unipolar input voltage DC signal proportional to the instantaneous absolute value of a source voltage at the single phase AC input; generating an input peak voltage DC signal proportional to the peak value of the rectified voltage of the source voltage; generating a converter current signal proportional to the instantaneous magnitude of the DC current on the converter's DC power bus; generating a unit sine function value from the product of the unipolar input voltage DC signal and the inverse of the input peak voltage DC signal; generating a feed forward current signal from the product of the unit sine function value and a limit current value; generating a feed forward power signal from the product of the feed forward current signal and the unipolar input voltage DC signal; generating a feedback power signal from the product of the unipolar input voltage DC signal and the converter current signal; comparing the feed forward power signal to the feedback power signal to determine a difference power value equal to the difference between the value of the feed forward power signal and the value of the feedback power signal; inputting the difference power value to a power conversion switch device controller; and outputting a control signal from the power conversion switch device controller to the at least one power conversion switch device, the control signal proportional to the difference power value.