A microcontroller-based sensorless brushless DC (BLDC) motor drive for areomodelling

Long-han Cao; Tao Liu; Rui Li; Fan Wu

doi:10.1117/12.784136

7 January 2008 A microcontroller-based sensorless brushless DC (BLDC) motor drive for areomodelling

Long-han Cao, Tao Liu, Rui Li, Fan Wu

Proceedings Volume 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials; 679406 (2008) https://doi.org/10.1117/12.784136
Event: ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 2007, Gifu, Japan

Abstract

A novel approach to back-EMF detection of sensorless brushless DC motor drive systems was proposed. Theoretical analysis of back-EMF sensing is presented, and indicates the back-EMF signal can be extracted for each floating phase whether the PWM is on or off time. As a result, the proposed method rejects the high frequency switching noise and no filtering. Moreover, it provides a highly accurate zero crossing point. This proposed sensing scheme is implemented into a microcontroller for a sensorless BLDC motor. The microcontroller has been successfully applied to the aeromodelling motor. The applied results verify the theoretical analysis and demonstrate that the microcontroller provide a good motor performance.

Citation Download Citation

Long-han Cao, Tao Liu, Rui Li, and Fan Wu "A microcontroller-based sensorless brushless DC (BLDC) motor drive for areomodelling", Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 679406 (7 January 2008); https://doi.org/10.1117/12.784136

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