Abstract
This paper proposes a new zero-crossing point detection method for BLDCM without using the position sensor. Regarding phase current and phase back-EMF as state variables, the observer model of the phase back-EMF could be obtained from derivation of the mathematical model of BLDCM. This observation model could observe the value of the phase back-EMF real-timely, and the zero-crossing point could be directedly detected through measuring the back- EMF at high speed. But the phase back-EMF is relatively smaller at low speed, and it is possible to cause unexpected commutation. A kind of zero-crossing point detection method is proposed based on this model for low-speed control. Combining the observation model and the zero-crossing point detection method, it could realize the zero-crossing point detection of the BLDC in full speed range. The simulation and experimental results show the feasibility of this method.
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© 2011 Springer-Verlag Berlin Heidelberg
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Lei, P., Beibei, W., Wei, G. (2011). A Novel Method for BLDCM Control Based on Phase Back-EMF Observation. In: Tan, H. (eds) Informatics in Control, Automation and Robotics. Lecture Notes in Electrical Engineering, vol 132. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25899-2_13
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DOI: https://doi.org/10.1007/978-3-642-25899-2_13
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-25898-5
Online ISBN: 978-3-642-25899-2
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