SINGLE PHASE PWM RECTIFIER IN TRACTION APPLICATION

Ľubomír Grman – Martin Hraško – Jozef Kuchta – Jozef Buday

   This research has been motivated by industrial demand for single phase PWM rectifier in traction application. This paper presents an advanced control structure design for a single phase PWM rectifier. The PWM rectifier is controlled to consume nearly sinusoidal current with power factor nearing to unity. The control structure consists of a DC-link voltage controller and a current controller implemented by a proportional- resonant controller using a fast phase angle and frequency estimator. The estimation algorithm is derived from the weighted least-squares estimation method. The feasibility of the proposed control structure is confirmed by experimental tests performed on designed laboratory prototype.

Keywords: rectifier, pulse width modulation, control algorithm, resonant control, phase angle estimation, traction application

[full-paper]