IGBT module is a modular semiconductor product which is packaged by IGBT (insulated gate bipolar transistor Chip) and FWD (Flywheel Diode Chip) through a specific circuit bridge. The encapsulated IGBT module is directly applied to frequency converters, UPS uninterruptible power supplies and other equipment. IGBT module has the characteristics of energy saving, convenient installation and maintenance, stable heat dissipation and so on. At present, most of the products sold in the market are such modular products, and the commonly referred IGBT also refers to IGBT modules.