A Method for Getting Optimum Commutation Advance Angle in Brushless DC Motor
Brushless DC motor-BLDCM self-synchronization relies on rotor position sensors. Because of the inverter diodes freewheeling conduction and the motor’s inductance, the current of phase lags its back EMF, which results in the electromagnetic torque ripple. This paper analyzes the reason of the lagging and derives the relation between lag angle and the constant plateau value of phase current and proposes the dynamic advance angle tracking method based on minimizing the constant plateau value of phase current. Simulation results show that the method can track the optimum commutation advance angle in BLDCM.
KeywordsBLDCM constant plateau value of phase current optimum commutation advance angle
Unable to display preview. Download preview PDF.
- 1.Bose, B.K.: Modern Power Electronics and Ac Drives, pp. 493–494. Machinery Industry Press, Beijing of China (2003)Google Scholar
- 3.Lou, H., Wu, J.: Commutation control of permanent brushless DC motors. Proceedings of the CSEE 27(6), 12–16 (2007) (in Chinese)Google Scholar
- 4.Lin, P., Wei, K., Zhang, Z.: A novel control scheme to suppress the commutation torque ripple in LDCM. Proceedings of the CSEE 26(3), 153–158 (2006) (in Chinese)Google Scholar
- 5.Hu, Q., Yan, Y.: Prior angle control fordoubly salient permanent magnet motors. Transactions of China Electro Technical Society 20(9), 13–18 (2005) (in Chinese)Google Scholar