Depended on proven spindle servo technology, inducted with industrial design idea, employed three-dimensional digital simulation and thermal emulation techniques. GSK researched and designed GS3000Y series servo drive unit, and the performances have greatly improved on drive capacity, heat emission, product design and manufacturability, etc. GS3000Y series spindle servo drive unit is divided into 5 structures based on different output powers. It can be adaptive to 1.5kW~18.5 kW asynchronous spindle servo motor; it is not only satisfied with the constant power speed adjustment, but also the spindle position and Cs axis position control, which is completely satisfied with requirements ofCNC machineand automatic equipments.