Similar articles

Abstract: We propose a position sensorless control scheme for a four-switch, three-phase brushless DC motor drive, based on the zero crossing point detection of phase back-EMF voltages using newly defined error functions (EFs). The commutation instants are 30° after detected zero crossing points of the EFs. Developed EFs have greater magnitude rather than phase or line voltages so that the sensorless control can work at a lower speed range. Moreover, EFs have smooth transitions around zero voltage level that reduces the commutation errors. EFs are derived from the filtered terminal voltages v_ao and v_bo of two low-pass filters, which are used to eliminate high frequency noises for calculation of the average terminal voltages. The feasibility of the proposed sensorless control is demonstrated by simulation and experimental results.

[1] 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.

[2] Halvaei Niasar, A., 2007. Sensorless Control of Four-Switch, Three-phase Brushless DC Motor Drives for Low-cost Applications. PhD Thesis, Iran University of Science and Technology, Tehran, Iran.

[3] Halvaei Niasar, A., Moghbelli, H., Vahedi, A., 2007. A Novel Sensorless Control Method for Four-switch, Brushless DC Motor Drive Without Using Any 30 Degree Phase Shifter. Proc. IEEE Int. Conf. on Electrical Machines and Systems, p.408-413.

[4] Jahnson, J.P., Ehsani, M., Guzelaunler, Y., 1999. Review of Sensorless Methods for Brushless DC. Proc. IEEE IAS Annual Meeting Conf., 1:143-150.

[5] Lee, B.K., Kim, T.H., Ehsani, M., 2003. On the feasibility of four-switch three-phase BLDC motor drives for low cost commercial applications: topology and control. IEEE Trans. Power Electron., 18(1):164-172.

[6] Li, Q., Lin, M.Y., Hu, M.Q., Gu, W.G., 2006. Research on Filters for Back EMF Zero-crossing Detecting in Sensorless BLDC Motor Drives. Proc. IEEE Int. Conf. on Industrial Technology, 3:1899-1905.

[7] Lin, C.T., Hung, C.W., Liu, C.W., 2008. Sensorless control for four-switch three-phase brushless DC motor drives. IEEE Trans. Power Electron., 23(1):438-444.

[8] Pillay, P., Krishnan, R., 1989. Modeling, simulation, and analysis of permanent-magnet motor drives, II: The brushless DC motor drive. IEEE Trans. Ind. Appl., 25(2):274-279.

[9] Shao, J., Nolan, D., 2002. A Novel Direct Back EMF Detection for Sensorless Brushless DC (BLDC) Motor Drives. Proc. IEEE Applied Power Electronics Conf. and Exposition, 1:33-37.

[10] Su, G.J., McKeever, W., 2004. Low-cost sensorless control of brushless DC motors with improved speed range. IEEE Trans. Power Electron., 19(2):296-302.

[11] Texas Instruments, 2001. TMS320LFLC240xA DSP Controllers Reference Guide—System and Peripherals. No. SPRU357B.

[12] Wang, C., Sung, G., Fang, K., Tseng, S., 2007. A Low-power Sensorless Inverter Controller of Brushless DC Motors. Proc. IEEE Int. Symp. on Circuits and Systems, p.2435-2438.

[13] Zhou, G., Wu, Z., Ying, J., 2005. Improved Sensorless Brushless DC Motor Drive. Proc. IEEE Power Electronics Specialists Conf., p.1353-1357.