1.We use Intelligent Power Module (IPM) as the power inverter. The IPM is of high integration, high reliability and high turn on-off frequency. So we can realize mute control. 2.The core device in the system adopts high-speed Digital Signal Processor (DSP) and Programmable Logic Device (PLD). 3.Flexible Control Modes: Speed Control, Position Control and Torque Control. 4.Perfect Interfaces: Serial Communication Interface, Impulse Input and Analog Input Interface. 5.Open Hardware Configuration: Suitable for various motors. 6.Wide range of speed regulation, Steady torque and High precision. The speed regulation ratio is 1：10000. Smoothly accelerate or decelerate in the full-speed rang. The precise location is not more than one pulse. 7.Modifying parameters