A New Single-Stage Three-Phase PFC for Four-Switch Three-Phase Inverter Fed IM Drives

Abstract

This paper proposes a single-stage three-phase power factor correction (PFC) for four-switch inverter (FSI) fed induction motor (IM) drives. The PFC scheme uses a Cuk converter with only one switch, and consequently, it needs only one control signal. This attains low computation burden, simple control algorithm, and minimum cost. A new PFC control technique is proposed to guarantee sinusoidal supply currents with high power factor (PF) and low total harmonic distortion (THD). Moreover, the PFC technique regulates the DC bus voltage. Equivalent circuits of the Cuk converter operating in two modes are deduced, its mathematical modeling and analysis are performed. The proposed drive system is built using MATLAB/Simulink and operates in real-time using a prototype system which consists of a DSP-DS1104 digital control board and an IM. The efficacy of the Cuk converter is verified by extensive tests in various operating conditions.

Keywords

• induction motors
• inverters
• converters
• motor drives
• machine vector control