Analysis and Suppressing Speed Fluctuations in Brushless DC Motors

Year 2019, Volume: 7 Issue: 3, 300 - 310, 30.07.2019

Muhammed Reşit Çorapsız , Hakan Kahveci , Muhammed Fatih Çorapsız

https://doi.org/10.17694/bajece.569774

Cited By: 2

Abstract

The fluctuations in
both speed and torque magnitudes during operation are among the major
disadvantages of brushless DC motors. These fluctuations occur due to both the
commutation of the inverter switches and the phase winding inductances. This
case can lead to major problems, especially in applications which are required
constant speed and constant torque. In this work, it was aimed to reduce speed
fluctuations that occur in brushless DC motors. Firstly, the Matlab/SIMULINK model
was created by using the dynamic equations of the brushless DC motor. Secondly,
a region selective circuit was designed for use in commutation times. Finally,
the commutation signals were generated from the magnitude of the torque
produced by the motor. Consequently, the proposed technique was controlled
under different speed conditions and was shown that the speed fluctuations can
be reduced without the difficult calculations of the commutation time.
According to the results obtained, it was observed that the speed fluctuations
were significantly reduced.

Keywords

BLDC Motor (BLDCM), Commutation, Reduction of Speed Fluctuation, DC Link Voltage Control

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