Open AccessAnti-EMI Noise Digital Filter Design for a 60-kW Five-Level SiC Inverter Without Fiber Isolation
Author(s) -
Lu Wang,
Yanjun Shi,
Hui Li
Publication year - 2017
Publication title -
ieee transactions on power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.159
H-Index - 266
eISSN - 1941-0107
pISSN - 0885-8993
DOI - 10.1109/tpel.2017.2710483
Subject(s) - power, energy and industry applications , aerospace , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , fields, waves and electromagnetics , general topics for engineers , nuclear engineering , signal processing and analysis , transportation
Silicon carbide (SiC) power devices are beneficial to the converters in terms of size reduction and efficiency increase. Nevertheless, the fast switching of SiC devices results in more serious electromagnetic interference (EMI) noise issue. Optical fibers based isolation provides a reliable solution to block the EMI noises from the power circuit to the control circuit but with additional cost and size penalty, especially for multilevel converters. This letter aims at the digital filters based solution to suppress the sampling noise caused by EMI without any extra hardware cost. An improved median filter and a novel magnitude bandpass filter are proposed. The design tradeoffs among noises filter capability, delay effect and the computation time have been discussed for proposed filters. The anti-EMI noise function of proposed filters has been experimentally verified in a 60-kW five-level SiC inverter.