Title :
Influence of PWM modes on non-commutation torque ripple in brushless DC motor control system
Author :
Meilan Zhou ; Zhi Li ; Quan Gu ; Zeqing Xu ; Huifeng Xu
Author_Institution :
Coll. of Electr. & Electron. Eng., Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
Brushless DC motor has large torque ripple for the design and characteristic of the control strategies. The torque ripple can be divided into commutation torque ripple and non-commutation torque ripple. This paper analyses why the non-commutation torque ripple produced in detail, points out the brushless DC motor can cause the diode freewheeling of inactive phase and non-commutation torque ripple when using the existing PWM modulation mode. According to the method of PWM_ON_PWM modulation mode, the result shows that it can reduce non-commutation torque ripple. But the method also can bring out new problem, the brushless DC motor need to commutate every 30 electrical angle. This paper uses the digital chip-TMS320F2812 to control the commutation time. The result shows the brushless DC Motor modulation can decrease non-commutation torque ripple effectively.
Keywords :
brushless DC motors; commutation; machine control; microprocessor chips; pulse width modulation; torque control; PWM_ON_PWM modulation mode; brushless DC Motor modulation; brushless DC motor control system; commutation time control; commutation torque ripple; digital chip-TMS320F2812; diode freewheeling; electrical angle; inactive phase; noncommutation torque ripple reduction; torque ripple; Commutation; Force; Integrated circuits; Pulse width modulation; Switches; Torque; Brushless DC motor; Non-commutation torque ripple; Non-conducting phase freewheeling; PWM_ON_PWM; TMS320F2812;
Conference_Titel :
Measurement, Information and Control (ICMIC), 2013 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4799-1390-9
DOI :
10.1109/MIC.2013.6758129
