BLY series of DC brushless motor (hereinafter referred to as DC brushless motor ) is a kind of totally closed fan self-cool constant torque motor, with international advanced level, high efficiency and low energy consumption. DC brushless motor is the item of National High-tech Industrialization Demonstration Projects. It is also the recommended product of national DC Brushlessmotor.com. DC brushless motor is of high efficiency, high power factor, and low energy consumption. Its efficiency characteristic curve is high and average. Its energy-saving effect is more obvious when the motor is running with light load. DC brushless motor has large start torque, better overload capability. It has advantages of simple and rational structure, beautiful shape, reliable running, and easy maintain. Its insulation level is F, motor outer covering protection rank is IP54, and cooling method is IC411. Its installation structure, installation dimension, oueside dimension are same with Y series of motor. DC brushless motor is a kind of universal motor. It is used to drive all kinds of mechanical equipment, such as metal cutting machine tool, blower, water pump, farm machine, transport machinery, etc. It is especially applicable to industries with large power, large start torque, large load change, such as oilfield, coal, steel rolling, spinning, chemical, automotive, aerospace, etc.