IGBT (Insulated Gate Bipolar Transistor), is composed by a MOS (insulated gate field effect transistor) and a BJT (bipolar transistor). It is a voltage-driven power semiconductor device. IGBT can be a single discrete device or a module, each kind with its own range of applications. In industry, it is used in traffic control, power conversion, industrial motors, UPS uninterruptible power supply, wind turbine power and solar energy equipment, frequency converter, etc. In consumer electronics, it is used in household appliances, charging piles, electric vehicles, power tools, etc.