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Reduction of return current noise by energy‐compensating active control
Author(s) -
Azuma Satoshi,
Yamasaki Hisanori,
Itoh Daisuke,
Maruyama Takafumi
Publication year - 2008
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20615
Subject(s) - active noise control , capacitor , noise (video) , inverter , engineering , current (fluid) , controller (irrigation) , electronic engineering , energy (signal processing) , control theory (sociology) , electrical engineering , filter (signal processing) , computer science , physics , control (management) , voltage , agronomy , quantum mechanics , artificial intelligence , image (mathematics) , biology
A newly proposed energy‐compensating active control is implemented to reduce the return current noise which is caused by inverter‐driven electric car systems. The energy‐compensating active control detects the energy charged at the filter capacitor, and reduces the energy and current of the noise frequency component by simple feedback loop incorporated with the conventional motor torque controller. No additional sensors or circuit arrangements are necessary; therefore, the return current can be attenuated effectively without any further cost. The return current with an inverter system is measured using a current probe and an FFT analyzer, and it is shown that the 25‐Hz noise current is reduced by up to 10 dB with the control. The results reveal that the low‐frequency return current noise can be attenuated with the simple control scheme, which would expectedly reduce the size of filter reactors and capacitors to meet the current limit level of the signaling system's track relays. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 165(4): 84–91, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20615