Torque Ripple Minimization in Direct Torque Control of Brushless DC Motor

다국어 초록 (Multilingual Abstract)

This paper mainly proposes a direct torque control strategy to minimize torque ripple in brushless DC (BLDC) motor. BLDC motor has large current and torque ripple when one voltage vector applied in one cycle due to its low inductance. Hence, this paper proposed a hysteresis torque control with PWM mode to control the resultant torque. Moreover, when the direct torque control system is operating during the two-phase half-bridge 120° conduction mode, large torque ripple in commutation area appears every 120 electrical degree. Based on analyzing the root of torque ripple in detail, lookup tables of switching devices states for new half-bridge modulation mode in the positive and negative reference torque put forwarded. Finally, simulations by MATLAB software and experiment results from DSP are presented to verify the feasibility and effectiveness of the proposed strategy operating in four-quadrant operation.

목차 (Table of Contents)

• Abstract
• 1. Introduction
• 2. Direct Torque Control System of BLDCM
• 3. Simulations and Experiments
• 4. Conclusion
• References

참고문헌 (Reference)

1 Zhenguo Li, "Torque Ripple Reduction in Direct Torque Controlled Brushless DC Motor" 2011

2 An Quntao, "Flux linkage self-control based direct torque control of brushless DC motor" 30 (30): 86-92, 2010

3 Seog-Joo Kang, "Direct torque control of brushless DC motor with nonideal trapezoidal back EMF" 10 (10): 796-802, 1995

4 Liu Yong, "Direct torque control of brushless DC drives with reduced torque ripple" 41 (41): 599-608, 2005

5 Gao Jin, "Direct self-control for BLDC motor drives based on three-dimensional coordinate system" 57 (57): 2836-2844, 2010

6 Ozturk S. B., "Direct Torque and Indirect Flux Control of Brushless DC Motor" 16 (16): 351-360, 2011

7 Liu Yong, "Commutationtorque-ripple minimization in direct-torque-controlled PM brushless DC drives" 43 (43): 1012-1021, 2007

8 Takashi Kenjo, "Brushless motors: advanced theory and modern applications" Sogo Electronics Press 2003