| Abstract |
The paper describes a new generation of quasi-resonant switching DC-DC converters. Some of them have been suggested first in a previous paper [1]. They have strong similarities in their configurations with the buck, boost and buck and boost choppers [1], although their operations have salient differences. The currents of their controlled switches are sinusoidal like rather than trapezoidal. They are called Zero Voltage Turn-off Quasi-Resonant Converters (ZVT - QRC) rather than Zero Voltage Switching (ZVS) or Zero Current Switching (ZCS) QRC for the voltage across the controlled switches are practically zero during their turning-off, Either transistors of SCR's can be applied as controlled switches in them. They were devised for high frequency operation. They offer services from low up to high power. Their output voltage can be changed in wide range and it can be either higher or lower than the input one depending on the configuration. One converter can operate as current generator. |
