Research Article Open Access

An Electronic Controlled Adjustable Speed Drive of PMBLDC Motor Using a Single-Stage PFC Half-Bridge Converter

Abstract

The permanent magnet blush less dc motor (PMBLDCM) speed can be controlled with electronic equipment using a buck half-bridge DC-DC converter is used as a single-stage power factor correction (PFC) converter. This is for feeding a voltage source inverter (VSI) based permanent magnet brushless DC motor (PMBLDCM) drive. The front end of this PFC converter is a diode bridge rectifier (DBR) fed from single-phase AC mains. Here the PMBLDCM is used to drive a compressor load of an air conditioner through a three-phase VSI fed from a controlled DC link voltage. The speed of the compressor is controlled to achieve energy conservation using a concept of the voltage control at DC link proportional to the desired speed of the PMBLDCM. Therefore the VSI is operated only as an electronic commutator of the PMBLDCM. The proposed PMBLDCM drive with voltage control based PFC converter is designed, modeled and its performance is simulated in Mat lab-Simulink environment for an PMBLDC motor in air conditioner compressor. The simulated results of the proposed speed control of a PMBLDC motor in an air conditioner, With the controlling of speed as electronically using specific power electronic circuit with suitable switching technique can have a less number of harmonic content as this results gives perfect results as our requirement, here also we can have a observation on the simulation results of speed ranges at different levels, current harmonic levels at study state condition and the total harmonic distortion (THD) are specified in this proposed PMBLDC motor drive.

Dichendra Kumar Gonu, Rajasekharachari k, C.B.Saravanan

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