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access icon free New sensorless commutation method for BLDC motors based on the line-to-line flux linkage theory

© The Institution of Engineering and Technology
Received 21/06/2018, Accepted 04/10/2018, Revised 28/09/2018, Published 16/10/2018

Sensorless brushless DC (BLDC) motor control is one of today's industry's requirements. The quality of this control is strongly dependent on the exact identification of the rotor angle for switching. In this study, a new sensorless BLDC motor control is introduced that could determine the exact time of the commutation. This method is based on the line-to-line flux linkage. The unscented Kalman filter method is used to identify the parameters in the proposed method. In comparison with back electromotive force based methods, this approach has advantages such as reduction of torque ripple due to commutation operations and resistance to motor parameters’ changes. The correctness of the method and the performed comparison is proved by the computer simulation and practical results.

Inspec keywords: Kalman filters; nonlinear filters; brushless DC motors; sensorless machine control; electric potential; rotors; commutation

Other keywords: unscented Kalman filter method; line-to-line flux linkage; commutation operations; motor parameters; sensorless BLDC motor control; line-to-line flux linkage theory; sensorless commutation method; rotor angle; sensorless brushless DC motor control

Subjects: d.c. machines; Control of electric power systems; Simulation, modelling and identification

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