Brushless DC motor based ceiling fan using buck-boost converter

This paper deals with an improvement in power quality and reduction in power consumption of the brushless DC (BLDC) motor targeting low power home appliances. Hall Effect sensors are used to detect the rotor position for electronic commutation of the BLDC motor. The motor is fed through a three phase voltage source inverter (VSI) fed through single phase diode bridge rectifier and a DC- DC converter. Speed of the fan is controlled by varying the DC link voltage at the VSI input. This paper tabulates and analyzed the performance of 120V rating PMBLDCM based fan over 24V rating PMBLDCM based fan available in Indian market.