| Title |
Resonant Step-Down DC DC Converter to Reduce Voltage Stresses of Motor Driving Inverter under 3-phase AC Utility Line Condition |
| Authors |
Kyung-Soo Kang ; Sang-Eon Kim ; Joon-Hwan Lee ; Chung-Wook Roh |
| DOI |
10.6113/TKPE/2014.19.5.391 |
| Keywords |
3-phase power; Driving motor; Inverter; Inverter module; Resonant converter |
| 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. |