THX series plastic injection machine applies the well-developed electronic and power control technology. It can correspondingly adjust frequency according to different pressure flow requirements in the plastic injection molding process. It thus fulfills the best match and control to supply and demand between motor and plastic injection machine. It attains quick start with zero rotating speed. It fundamentally controls power source of plastic injection machine and significantly saves the energy, helps the users to further enhance the competitive power, therefor provides the users with the sound return of investment.