Hefei Sanyu Electric Co., Ltd. was found in 1989, specializing in manufacture IGBT inverter welding machines, the most advantage of our product is large power with small volume. Our company has been maintaining a leading technology of independent intellectual property rights, and developing varies professional high-power energy-saving power supply and welding machines. Our tens of inverter power supply and welder products have been using by PLA General Armament Department, and tens of professional high-power power supply is the main study which is cooperative researched with CAS, and more than one hundred of patent products have been successfully used in various industries. Our company has been researched in IGBT inverter for tens of years, power density of our machine is leading in the world.