Position Sensorless DTC of BLDC Motor Driver Based on Sliding Mode Observer

Song Lin Wang; Shun Yi Xie

doi:10.4028/www.scientific.net/AMR.805-806.954

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 805-806Position Sensorless DTC of BLDC Motor Driver Based...

Position Sensorless DTC of BLDC Motor Driver Based on Sliding Mode Observer

Abstract:

Direct torque control (DTC) which replaces the conventional current loop with torque loop can directly control the electromagnetic torque in order to reduce the torque error within the hysteresis bandwidth, and it can attenuated commutation torque ripple and the torque ripple of brushless DC (BLDC) motor with un-ideal back electromotive force (EMF) waveforms. Further, the key issue of feedback torque calculation in torque loop is the estimation of back-EMF in sensorless DTC of BLDC motor. So a sliding mode observer (SMO) is employed to estimate the back-EMF in real time. The torque and rotor speed can be derived from the estimated back-EMF. Simulation results demonstrate the proposed method is valid and effective.

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Periodical:

Advanced Materials Research (Volumes 805-806)

Pages:

954-957

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.805-806.954

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Online since:

September 2013

Authors:

Song Lin Wang*, Shun Yi Xie

Keywords:

Brushless Dc Motor (BLDCM), Direct Torque Control (DTC), Sliding Mode Observer (SMO), Torque Ripple

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