A New Initial Rotor Angle Position Estimation Method for High-speed Brushless DC Motor Using Current Injection and Mathematical Model

[+] Author and Article Information
Wang Zhenyan

School of Electronical and Information Engineering, Taiyuan University of Science and Technology; School of Electronical and Information Engineering, Taiyuan University of science and technology, Taiyuan, Shanxi, 030024, China

He Yanzhao

Beijing Institute of Control Engineering, Beijing Sunwise Space Technology Ltd, Beijing Institute of Control Engineering, Beijing, 100190, China

1Corresponding author.

ASME doi:10.1115/1.4038714 History: Received July 13, 2015; Revised November 15, 2017


In this paper, a new initial rotor angle position estimation method for the sensorless high-speed brushless DC motor (HS-BLDCM) is proposed. Two groups of special three-phase conduction current pulse signals are injected into the three-phases of the motor, and the mathematical formulation for the initial angle position estimation is illustrated. The initial rotor position is expressed as a function of the line voltage, the phase current derivative and the average value of d-q frame stator inductance. Particularly, the independent parameters of the initial rotor angle position are eliminated in the mathematical model. The cooperative simulation results based on Maxwell and Simplorer and the experimental results demonstrate that the proposed method is effective with the estimation error less than 0.2º electrical in simulation and 5 º electrical in experiment.

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