Reduction of THD using CUK converter for adjustable speed PMBLDCM drive

POWER ELECTRONICS

New Cuk converter technique is used to reduce the THD of motor drive by power factor correction play an important role in the energy saving during energy conversion. The concept of voltage control at the dc link proportional to the desired speed of the PMBLDCM is used to control the speed of the compressor. The ac-dc conversion of electric power is usually required which causes many current harmonics and results in the poor power factor at the input ac mains. The use of a permanent-magnet brushless dc motor (PMBLDCM) in low-power appliances is used because of its features of high efficiency, wide speed range, and low maintenance. This paper deals with the power factor correction of BLDC motor with Cuk dc–dc converter. A three-phase voltage-source inverter is used as an electronic commutator to operate the PMBLDCM. It also compares the Total Harmonic Distortion (THD) of the Input AC current with PID controller in Matlab- Simulink environment.

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