LD series servo motors are AC permanent magnet motors. Their main characteristics are: super energy saving, high response, high precision, low noise, low temperature rise, high performance rare earth permanent magnet material for rotor, reliable operation, no maintenance and maintenance; small inertia, easy to improve the system's rapidity; small volume, fast speed and large torque. High resolution encoders (16 bits and 17 bits) are used in different industries to improve position control accuracy. Using d-q axis converting current control method, the accuracy of torque control is improved from (+5%) to (+2%). The product specifications are complete and meet different subdivision industries. It has been widely used in injection moulding machine, textile machinery, CNC machine tools and other industries.