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http://dx.doi.org/10.6113/TKPE.2014.19.5.391

Resonant Step-Down DC/DC Converter to Reduce Voltage Stresses of Motor Driving Inverter under 3-phase AC Utility Line Condition  

Kang, Kyung-Soo (PESL, Dept. of Electrical Eng., Kookmin University)
Kim, Sang-Eon (PESL, Dept. of Electrical Eng., Kookmin University)
Lee, Joon-Hwan (CE Operation Division, Samsung Electronics)
Roh, Chung-Wook (PESL, School of Electrical Eng., Kookmin University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.19, no.5, 2014 , pp. 391-398 More about this Journal
Abstract
This paper presents a resonant step-down DC/DC converter to reduce the voltage stresses of a 3-phase inverter module under the three-phase AC utility line condition. Under this condition, a conventional 3-phase inverter module suffers from high voltage stresses as a result of the high rectified DC link voltage; hence, a high-cost high-voltage-rating inverter module must be used. However, using the proposed converter, a low-cost low-voltage-rating inverter module may be adopted to drive the motor even under the 3-phase AC line condition. The proposed converter, which can be realized with small size inductor and low-voltage-rating semiconductor devices, operates at a high-efficiency mode because of the zero-current switching operations of all the semiconductor devices. The operational principles are explained and a design example is provided in the study. Experimental results demonstrate the validity of the proposed converter.
Keywords
3-phase power; Driving motor; Inverter; Inverter module; Resonant converter;
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