Design of speed control of bldc motor based on microcontroller
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Date
2013-06-01
Authors
Tiew Jih Yong
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Abstract
Recently, the brushless DC (BLDC) motors are gaining popular due to its efficiency and speed/torque characteristic. However, BLDC motors have encountered many hurdles to come to its present stage in terms of cost, noise, vibration and torque ripples. Continuous researches have been made to overcome these problems. Thus, in this project, BLDC motor is chosen due to its many advantages if compared to other motors. In order to run the BLDC motor, an appropriate switching technique must be used to generate the required pulses to drive the MOSFET driver. In this project, the switching technique used is pulse width modulation (PWM) which is produced by the dsPIC30F2010 microcontroller depending on the Hall sensor input from the motor. The speed of BLDC motor can be controlled by varying the duty cycle of PWM produced. The duty cycle will determine the average voltage supply to the motor and thus the speed of the motor as the speed depends on the average voltage supply. As a result, the microcontroller being used has successfully produced the PWM needed to operate the motor.