The basic function of the rear stage circuit is to invert the high-voltage DC boosted by the front stage into AC. From the structural point of view, the full-bridge structure is the most used. . The High-Frequency Inverter is mainly used today in uninterruptible power supply systems, AC motor drives, induction heating and renewable energy source systems. The simplest form of an inverter is the bridge-type, where a power bridge is controlled according to the sinusoidal pulse-width. . High-frequency inverters use high-frequency DC/AC conversion technology to convert low-voltage DC power into high-frequency low-voltage AC power. After being stepped up by a high-frequency transformer, the high-frequency inverter is rectified into high-voltage DC power, which is usually above 300V. . The converter power stage is based on a resonant inverter (the Φ2 inverter) providing low switch voltage stress and fast settling time. A new multi-stage resonant gate driver suited for driving large, high-voltage rf MOSFETS at VHF frequencies is also introduced. Experimental results are presented. . which is usually required to achieve rated ac from low dc voltage. The inher-ent voltage boosting capability of the ˆCuk inverter an reduce the transformer turns-ratio requirement by at least half. Low transformer turns-ratio yields less leakage inductance and sec-ondary winding resistance, which. . Traditionally, a twostage configuration is - widely applied with isolated dc-dc stage and a sinusoidal pulse-width-modulated (SPWM) dc-ac stage. However, this twostage - configuration suffers from more components count, more complex control and tend to have lower efficiency and lower power density. . The inverter stage is the “muscle” of the drive – a power electronics block that provides the regulated, conditioned power directly to the motor, driving it in the manner required by the end application, providing the amperes needed for torque production, the voltage needed for speed and magnetic. .
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