Similar articles

Abstract: Brushless DC motor (BLDCM) sensorless driving technology is becoming increasingly established. However, optimal phase correction still relies on complex calculations or algorithms. In finding the correct commutation point, the problem of phase lag is introduced. In this paper, we extract DC bus current information for auto-calibrating the phase shift to obtain the correct commutation point and optimize the control of BLDC sensorless driving. As we capture only DC bus current information, the original shunt resistor is used in the BLDCM driver and there is no need to add further current sensor components. Software processing using only simple arithmetic operations successfully accomplishes the phase correction. Experimental results show that the proposed method can operate accurately and stably at low or high speed, with light or heavy load, and is suitable for practical applications. This approach will not increase cost but will achieve the best performance/cost ratio and meet market expectations.

撷取母线电流信息 优化无传感器无刷直流电机驱动相位与转矩

[1]Abolfazl, H.N., Abolfazl, V., Hassan, M., 2009. Low-cost senseless control of four-switch, brushless DC motor drive with direct back-EMF detection. J. Zhejiang Univ.-Sci. A, 10(2):201-208.

[2]Acarnley, P.P., Watson, J.F., 2006. Review of position sensorless operation of brushless permanent-magnet machines. IEEE Trans. Ind. Electron., 53(2):352-362.

[3]Chen, C.H., Cheng, M.Y., 2006. Design of a multispeed winding for a brushless DC motor and its sensorless control. IET Electr. Power Appl., 153(6):834-841.

[4]Chen, H.C., Chang, Y.C., Huang, C.K., 2007. Practical sensorless control for inverter-fed BDCM compressors. IET Electr. Power Appl., 1(1):127-132.

[5]Chen, H.C., Tsai, T.Y., Huang, C.K., 2009. Low-speed performance comparisons of back-EMF detection circuits with position-dependent load torque. IET Electr. Power Appl., 3(2):160-169.

[6]Chuang, H.S., Ke, Y.L., Chuang, Y.C., 2009. Analysis of commutation torque ripple using different PWM modes in BLDC motors. IEEE Industrial Commercial Power System Technical Conf., p.1-6.

[7]Dixon, J.W., Leal, L.A., 2002. Current control strategy for brushless DC motors based on a common DC signal. IEEE Trans. Power Electron., 1(2):232-240.

[8]Gambetta, D., Ahfock, A., 2009. New sensorless commutation technique for brushless DC motors. IET Electr. Power Appl., 3(1):40-49.

[9]Han, S.Q., Zhang, Z., 2012. Design of control system for brushless DC motor based on DSP. 2nd Int. Conf. on Materials, Mechatronics and Automation. Lecture Notes in Information Technology, 15:58-64.

[10]Ho, Z.S., Uang, C.M., Wang, P.C., 2013. Full speed range senesorless circuit for BLDC motor driver. Electronic Technology Symp. Conf., p.519-522.

[11]Kim, T.H., Ehsani, M., 2003. An error analysis of the sensorless position estimation for BLDC motors. IEEE Industry Applications Conf. 38th IAS Annual Meeting, p.611-617.

[12]Liu, Y., Zhu, Z.Q., Howe, D., 2005. Direct torque control of brushless DC drives with reduced torque ripple. IEEE Trans. Ind. Appl., 41(2):599-608.

[13]Salah, W.A., Ishak, D., Hammadi, K.J., 2011. Minimization of torque ripples in BLDC motors due to phase commutation—a review. Przeglad Elektrotechniczny, 87:182-188.

[14]Shen, J.X., Tseng, K.J., 2003. Analyses and compensation of rotor position detection error in sensorless PM brushless DC motor drives. IEEE Trans. Energy Conv., 18(1):87-93.

[15]Uang, C.M., Ho, Z.S., Wang, P.C., et al., 2011. Sensorless position optimal control strategy of brushless DC motor. IEEE 9th Int. Conf. on Power Electronics and Drive Systems, p.653-658.