BLDC MOTOR DRIVE WITH POWER FACTOR CORRECTION

• This article presents a power factor correction (PFC)-based bridgeless canonical switching cell (BL-CSC) converter-fedbrushless dc (BLDC) motor drive.
•  The proposed BL-CSC converter operating in a discontinuous inductor current mode is used to achieve a unity power factor at the ac mains using a single voltage sensor.
•  The speed of the BLDC motor is controlled by varying the dc bus voltage of the voltage source inverter (VSI) feeding the BLDC motor via a PFC converter.

BLDC MOTOR DRIVE WITH POWER FACTOR CORRECTION

•  Therefore, the BLDC motor is electronically commutated such that the VSI operates in fundamental frequency switching for reduced switching losses. 
• Moreover, the bridgeless configuration of the CSC converter offers low conduction losses due to partial elimination of diode bridge rectifier at the front end. 
• The proposed configuration shows a considerable increase in efficiency as compared with the conventional scheme.
•  The performance of the proposed drive is validated through experimental results obtained on a developed prototype. 
• Improved power quality is achieved at the ac mains for a wide range of control speeds and supply voltages.
•  The obtained power quality indices are within the acceptable limits of IEC 61000-3-2.

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