This application note describes zero-voltage switching (ZVS) control technology and emitter-switched bipolar transistor (ESBT) application in 3-phase auxiliary power supplies.
The document details the use of a flyback converter with zero-voltage switching (ZVS) and an Emitter-Switched Bipolar Transistor (ESBT) as the primary switch. This topology is designed to reduce switching loss and electromagnetic interference (EMI) in applications requiring high breakdown voltage, such as inverters for induction motors and welding machines.
| Maximum input power | 200W |
|---|---|
| Nominal phase-to-phase voltage | 400VAC |
| Minimum switch voltage rating | 1500V |
The ESBT has a low saturation voltage, fast switching capability, and lower price compared to IGBTs or BJTs.
It supports inverters for induction motors, welding machines, and UPS systems.