PWM Soft Switched DC-DC Converter with Coupled Inductor

Soft switching is a possible way of reducing losses in power electronic switches. The expression "soft switching" actually refers to the operation of power electronic switches as zero-voltage switches (ZVS) or zero-current switches (ZCS).Zero Voltage Switching means that the power to the load (heater or cooler or other device) is switched on or off only when the output voltage is zero volts. ... With DC power, as used with thermoelectric controllers, the DC voltage is first converted by the controller to DC PWM - "DC voltage, Pulse Width Modulated".Current Zero Testing. Current zero (CZ) refers to the interruption phenomena in high power circuit-breakers. Today it seems improbable that high voltage circuits could be interrupted economically by other means than the electric arc.