Published Paper Details:

This paper gives the idea to power factor correction (PFC) - based Canonical Switching Cell (CSC) converter-fed Permanent Magnet Synchronous Motor (PMSM) drive for low-power applications. The speed of PMSM is controlled by varying the dc-bus voltage of Voltage Source Inverter (VSI). The PMSM is electronically commutated for reduced switching losses in VSI due to low-frequency switching. A front-end CSC converter operating in discontinuous inductor current mode (DICM) is used for dc-bus voltage control with unity power factor at ac mains. A sensor less for dc-bus voltage sensing is used for the development of the proposed drive, which makes it a cost-effective solution. In this work, PFC BL-CC converter is operated in discontinuous inductor current mode to attain better power quality. The DIC mode operation requires only one voltage sensor to sense DC-link voltage, whereas in Continuous Conduction Mode (CCM), the sensor requirement increases to three (two voltage sensors and one current sensor). The PFC BL-CC converter also eliminates the diode bridge rectifier stage. The simulation analysis indicates that a smooth control could be realized and the highest efficiency and the smallest current ripple could be achieved.