Conference Proceeding

A voltage controlled adjustable speed PMBLDCM drive using a single-stage PFC half-bridge converter

03/2010; DOI:10.1109/APEC.2010.5433505 pp.1976 - 1983 In proceeding of: Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE
Source: IEEE Xplore

ABSTRACT In this paper, a buck half-bridge DC-DC converter is used as a single-stage power factor correction (PFC) converter 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. 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 stator current of the PMBLDCM during step change of reference speed is controlled by a rate limiter for the reference voltage at DC link. The proposed PMBLDCM drive with voltage control based PFC converter is designed, modeled and its performance is simulated in Matlab-Simulink environment for an air conditioner compressor driven through a 1.5 kW, 1500 rpm PMBLDC motor. The evaluation results of the proposed speed control scheme are presented to demonstrate an improved efficiency of the proposed drive system with PFC feature in wide range of the speed and an input AC voltage.

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Keywords

1500 rpm PMBLDC motor
 
air conditioner
 
buck half-bridge DC-DC converter
 
controlled DC link voltage
 
diode bridge rectifier
 
electronic commutator
 
energy conservation
 
evaluation results
 
improved efficiency
 
input AC voltage
 
permanent magnet brushless DC motor
 
PFC converter
 
proposed drive system
 
proposed PMBLDCM drive
 
reference voltage
 
single-phase AC mains
 
single-stage power factor correction
 
step change
 
three-phase VSI
 
voltage control