Hybrid PWM Control for Regulating the High-Speed Operation of BLDC Motors and Expanding the Current Sensing Range of DC-link Single-Shunt

Nam Huh, Hyung-Seok Park, Man Hyung Lee and Jang-Mok Kim
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Nam Huh: Graduate School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
Hyung-Seok Park: Department of Electrical Engineering, Pusan National University, Busan 46241, Korea
Man Hyung Lee: Graduate School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
Jang-Mok Kim: Department of Electrical Engineering, Pusan National University, Busan 46241, Korea

Energies, 2019, vol. 12, issue 22, 1-13

Abstract: This study developed a hybrid pulse width modulation (PWM) control method intended for use in a high-speed brushless dc (BLDC) motor drive system that uses DC-link single-shunt current measurement. The method is designed to regulate rapid operation and expand the current sensing range of the aforementioned system and measurement, respectively. The operating characteristics of most typical PWM methods for BLDC motors were analyzed, after which, a PWM approach suitable for high-speed operation was identified. On the basis of the selected approach, the measurable range of DC-link single-shunt current was examined mathematically to determine a PWM method that is advantageous for current sensing. The results of the two analyses were used as guidance in formulating the proposed hybrid PWM control algorithm. Finally, the PWM method put forward in this work was verified through experimentation.

Keywords: high-speed BLDC motors; hybrid PWM method; DC-link current; single-shunt register; sensing range; current ripples (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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