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JIANG Shiqi,LIU Yitao,JIN Dianheng,PAN Xuewei.Conducted EMI Filter Design Based on Noise Source Impedance Estimation of Single-phase Grid-connected Inverter[J].JOURNAL OF POWER SUPPLY,2020,18(3):160-167
Conducted EMI Filter Design Based on Noise Source Impedance Estimation of Single-phase Grid-connected Inverter
Received:April 18, 2018  Revised:May 15, 2019
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DOI:10.13234/j.issn.2095-2805.2020.3.160
Keywords:single-phase inverter  noise source impedance  common mode interference  differential mode interference  electromagnetic interference(EMI) filter
Fund Project:Project Supported by Natural Science Foundation of Guangdong – Doctor startup project (2017A030310317)
           
AuthorInstitutionEmail
JIANG Shiqi School of Mechatronics and Control Engineering, Shenzhen University, Shenzhen , China
LIU Yitao School of Mechatronics and Control Engineering, Shenzhen University, Shenzhen , China
JIN Dianheng School of Mechatronics and Control Engineering, Shenzhen University, Shenzhen , China
PAN Xuewei School of Mechanical Engineering and Automation, Harbin Institute of TechnologyShenzhen, Shenzhen , China
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Abstract:
      Along with the development of technology for semiconductor material, the switching frequency of a power switch used in an inverter system keeps growing to a dozen, dozens of, or even hundreds of kHz, producing very large values of du/dt and di/dt at the switch. As a result, the coupling between parasitic inductors and capacitors among components within the inverter system or between the system and ground leads to common mode or differential mode electromagnetic interference(EMI). The interference noise propagates through the system in the form of conduction, greatly aff-ecting the normal operation of the control part in the inverter system as well as the nearby equipment. Based on the impedance characteristics of noise source, the parameters of an EMI filter are designed with the data of the source impedance measured using an experimental method with higher operability. This method can make the filter design more effective, speed up its design process, and save its correction time in engineering. Finally, it was found that EMI was efficiently suppressed in simulations and experiments, which verified the feasibility and effectiveness of the proposed method.
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