What is ZVS quasisquare-wave converter?

Answer 1

ZVS techniques are techniques that force the voltage across a switch to be zero just

before it is turned on or off and to keep this voltage zero while a switching transition

occurs. All MOSFETs and most IGBTs have anti-parallel diodes that are built into the

body of each device that allows current to flow from source to drain in a MOSFET and

from emitter to collector in an IGBT. A ZVS turn-on in MOSFETs and IGBTs is

therefore done by forcing current through the body-diode of the devices just before they

are turned on. This clamps the voltage across the device to a single diode drop (which is a

negligible voltage) during a switching transition so that turn-on switching losses are

greatly reduced. A ZVS turn-off is achieved by slowing down the rate of voltage rise

across a switch when it is turned off by adding some capacitance across the switch; this

limits the overlap between voltage and current during the switching transition

Answer 2

A ZVS (Zero Voltage Switching) quasisquare-wave converter is a power electronics converter that uses zero voltage switching techniques to minimize switching losses. It achieves high efficiency by ensuring the switching of the power devices occurs when the voltage across the device is close to zero. This design helps reduce power losses and improve the overall performance of the converter.