Programmable input power factor correction methods for single phase diode rectifier circuits

Two programmed methods for shaping the input current and controlling the input power factor of single-phase front-end diode rectifiers are proposed. These methods yield nearly sinusoidal input currents at a constant switching frequency. Moreover, instantaneous current control is achieved, resulting in very fast response and increased switch reliability. The methods are compatible with microprocessor-based converter controls. The second method has the added advantage of eliminating the need for input current sensing. Design data and predicted system performance are verified on a 1 kVA laboratory prototype.<>