LIU Changliang, DENG Yi, WANG Zicheng, PU Peipei, LI Chao, WU Yujing, ZHANG Jingyue. Filter method for pulse width modulation drive[J]. Journal of Applied Optics, 2022, 43(5): 859-863. DOI: 10.5768/JAO202243.0501005
Citation: LIU Changliang, DENG Yi, WANG Zicheng, PU Peipei, LI Chao, WU Yujing, ZHANG Jingyue. Filter method for pulse width modulation drive[J]. Journal of Applied Optics, 2022, 43(5): 859-863. DOI: 10.5768/JAO202243.0501005

Filter method for pulse width modulation drive

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  • Received Date: April 01, 2022
  • Revised Date: July 09, 2022
  • Available Online: July 26, 2022
  • The pulse width modulation (PWM) drive plays a pivotal part in the servo driving system. Therefore, the filters become more important in differential mode and common mode for pulse width signal ahead of direct current motors. The filter circuit was built with the WSA38M power amplifier module in a photoelectric inertial stabilized turret. The PWM drive switch frequency was analyzed, which caused motor heating and electromagnetic coupling interference. The electric parameter of LC filter was calculated and the optimization simulation was carried out. The results of test and electromagnetic compatibility experiments show that the optimized electrical performance is excellent, especially the 22 kHz~53 kHz frequency band has less interference to the system, which is easy to meet the overall index requirements, and provides a reliable basis for the control system design.

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