| Abstract |
This paper outlines a recently introduced new parallel-connection technique and focuses its application to a 4.5 kW buck converter, using three Pulse Width Modulation (PWM) cells. The prototype works at a 20 kHz frequency, with a power source of 240V, delivering 21A to the output load. Three Insulated Gate Bipolar Transistors (IGBT's) are used to constitute the PWM cells, which are associated by means of small inductances. The paper proposes a simplified design procedure based on theoretical analysis and practical considerations. This paper also shows the employed power semiconductor elements, gating requirements and output waveforms, showing the excellent dynamic and steady-state current balance among the switches. |
