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Decoupled centric and non-centric PWM techniques for open-end winding induction motor drive

Ranjit Mahamkali (VNR Vignana Jyothi Inst. of Engineering and Technology, Dept. of EEE, Hyderabad, Telangana, India)
Reddy Bramhananda Teegala (G. Pulla Reddy Engineering College, Dept. of EEE, Kurnool, Andhra Pradesh, India)
Suryakalavathi Munagala (Jawaharlal Nehru Technological University Hyderabad, Dept. of EEE, Telangana, India)

This article proposes the space vector based decoupled centric and non-centric PWM techniques for open-end winding induction motor drive. To make the proposed configuration, 2-coventional inverters are fed on either side of open-circuited stator winding of induction motor. Therefore three level output is achieved. To obtain the control pulses for inverters in the proposed configuration reference sinusoids are used. All the proposed PWM techniques use the equal switching frequency. To obtain the validation for the proposed work various theoretical and simulation analysis is carried out using v/f control and the corresponding output voltage is verified experimentally using 1HP asynchronous motor.

Keywords: Centric PWM (CPWM), Decoupled, Non-centric PWM (NCPWM), Open-end winding Induction Motor (OEWIM)