Sensorless control method of a delta winding brushless DC motor using a state observer

Yung-Deug Son; Hyeong-Jin Kim; Jang-Mok Kim

Sensorless control method of a delta winding brushless DC motor using a state observer

Yung-Deug Son

Hyeong-Jin Kim

Jang-Mok Kim

Vol. 25, No. 2, pp. 260-270, Feb. 2025

10.1007/s43236-024-00954-7

Delta-connection BLDC motor

Sensorless control

DSOGI-PLL

State observer

Abstract

Delta-winding brushless DC (BLDC) motors are advantageous for operations requiring high torque and speed. However, the application of conventional sensorless methods, such as those using zero-crossing point of the back-EMF detection, to the delta-winding BLDC motor is difficult because the delta-winding motors have a different characteristic in back electromotive force (EMF) from star-winding BLDC motors. Accordingly, this work proposes a sensorless control method that utilizes a double second-order generalized integrator phase locked loop with back-EMF estimation based on a state observer for the delta-winding BLDC motors. From the estimated back-EMF, a positive sequence sinusoidal back-EMF can be obtained and used to estimate the exact position of the rotor. The effectiveness of the proposed sensorless control method is verified through experimental results.

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Cite this article

[IEEE Style]

Y. Son, H. Kim, J. Kim, "Sensorless control method of a delta winding brushless DC motor using a state observer," Journal of Power Electronics, vol. 25, no. 2, pp. 260-270, 2025. DOI: 10.1007/s43236-024-00954-7.

[ACM Style]

Yung-Deug Son, Hyeong-Jin Kim, and Jang-Mok Kim. 2025. Sensorless control method of a delta winding brushless DC motor using a state observer. Journal of Power Electronics, 25, 2, (2025), 260-270. DOI: 10.1007/s43236-024-00954-7.