전기전자학회논문지 (Journal of IKEEE)

  • 제23권1호
  • /
  • Pages.310-313
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  • 2019
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  • 1226-7244(pISSN)
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  • 2288-243X(eISSN)
한국전기전자학회 (Institute of Korean Electrical and Electronics Engineers)
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A Study on the Enhanced Filtering for the Removal of BEMF in BLDC Motors

  • 투고 : 2019.02.25
  • 심사 : 2019.03.25
  • 발행 : 2019.03.31
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초록

This paper used the majority function to digitally filter back-electromotive force as an explanation of the Brushless DC MOTOR control algorithm. The cause and improvement of motor noise, which are operating in close proximity to high frequency sources, did not use conventional low pass filter and comparator elements. Also, they repeatedly output a noise-free BEMF signal for the input value of the majority detection filtering. These filtering steps can help reduce costs and minimize the area of a PCB by requiring relatively little hardware.

키워드

JGGJB@_2019_v23n1_310_f0001.png 이미지

Figure 1. BEMF on all 3 phases.

JGGJB@_2019_v23n1_310_f0002.png 이미지

Figure 2. BEMF sampling point with 80% duty cycle.

JGGJB@_2019_v23n1_310_f0003.png 이미지

Figure 3. BEMF sampling point at 20% duty cycle.

Table 1. majority functions with three inputs.

JGGJB@_2019_v23n1_310_t0001.png 이미지

Table 2. Results of performing non-linear filters of the majority function.

JGGJB@_2019_v23n1_310_t0002.png 이미지

참고문헌

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  3. Z. Cunshan and B. Dunxin, "A PWM control algorithm for eliminating torque ripple caused by stator magnetic field jump of brushless DC motors," in Intelligent Control and Automation, 2008. WCICA 2008. The 7th World Congress on, 2008, 6547-6549, 2008. DOI: 10.1109/WCICA.2008.4592891
  4. K. Wei, et al., "A novel PWM scheme to eliminate the diode free wheeling in the inactive phase in BLDC motor," in Power Electronics Specialists Conference, PESC 04. 2004 IEEE 35th Annual, 2004, 2282-2286 Vol. 3, 2004. DOI: 10.1109/PESC.2004.1355477
  5. K. Wei, et al., "A novel PWM scheme to eliminate the diode freewheeling in the inactive phase in BLDC motor," Frontiers of Electrical and Electronic Engineering in China, vol. 1, 194-198, 2006. DOI: 10.1007/s11460-006-0019-y
  6. M. Guangwei, et al., "Commutation torque ripple reduction in BLDC motor using PWM_ON_PWM mode," in Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on, 2009, 1-6, 2009. DOI: 10.1109/ICEMS.2009.5382974
  7. X.-j. Zhang and B.-s. Chen, "Influence of PWM modes on commutation torque ripples in sensor less brushless DC motor control system," Journal of Shanghai University (English Edition), vol. 5, 217-223, 2001. DOI: 10.1007/s11741-996-0028-3
  8. X. Zhang and B. Chen, "Influences of PWM mode on the current generated by BEMF of switch-off phase in control system of BLDC motor," in Electrical Machines and Systems, ICEMS 2001. Proceeding of the Fifth International Conference on, 2001, 579-582, vol. 1, 2001. DOI: 10.1109/ICEMS.2001.970742