The Quantitative Forecast and Suppression on the Electromagnetic Radiation from Low Voltage Frequency Converter

Abstract:

The main electromagnetic radiation source and the generating mechanism in low voltage frequency converter were defined and analyzed in this paper according to electromagnetic radiation theory together with the discussion of the impact on radiation from raise time, falling time of pulse width modulation (PWM) signal and carrier frequency, so that the radiation can be understood more exactly in term of numerical value change, which helps specifically reduction of converter radiation during design phase in compliance with related international standards and technical norms regarding industrial converter. Started with the theory of electromagnetic field the zone around converter were differentiated and analyzed based on the radiation characteristics. As main means of radiation suppression in converter shielding and grounding were quantitatively analyzed. A series of tests with different power rating converters verified the calculation and analysis. Consequently the design of converter was guided to meet the requirements of standard.

• Periodical: Applied Mechanics and Materials (Volume 575)
• Pages: 696-703
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.575.696
• Online since: June 2014
• Authors: Cheng Hai Gao*, Jian Ru Wan, Jiang Li
• Keywords: Electromagnetic Radiation, Low Voltage Frequency Converter, Quantitative Forecast, Suppression

References

[1] Weiming Ma, Zhihua Zhao, Jin Meng, Qijun Pan, Lei Zhang. Accurate Quantitative Forecast Method on Conductive Electromagnetic Disturbance[J]. Science in China Edition E Technology Science, 2009, 39(7): 1237-1246. In Chinese.

DOI: 10.1109/apemc.2008.4559962

[2] Jin Meng, Weiming Ma, Lei Zhang, Qijun Pan , Zhihua Zhao. High Frequency Model of Conducted EMI for PWM Variable-speed Drive Systems [J]. Proceedings of the CSEE ELECTRIC DRIVE, 2008, 28(15): 141-146. In Chinese.

DOI: 10.1109/apemc.2008.4559959

[3] Clayton R. Paul. Introduction to Electromagnetic Compatibility [M]. Version 1. Beijing: Mechanical Industry Press, 2006. In Chinese.

[4] Jinliang He. Conspectus to Electromagnetic Compatibility[M]. Version 1. Beijing: Science Press, 2010. In Chinese.

[5] Zheng Song, Jianhua Zhang, Ye Hung. Antenna and Radio Transmission [M]. Version 2. Xi'An: Xidian University Press, 2011. In Chinese.

[6] Xiuqing Zhou, Zhaoli Liu. Electromagnetic Shielding Design Probing on Electronic Device Box [J]. PETR0LEUM INSTRUME, 2006, 20(4): 24-27. In Chinese.