(1) motor to reduce routine maintenance and routine maintenance to avoid failure in the operation of motor is important, the most important aspect is the mobile inspection and promptly ruled out any causes of abnormal phenomena caused. There were incidents of serious accident to take measures is to reduce the number of accidents and repair stop to Taiwan to improve the motor efficiency necessary technical work. motor routine maintenance of its normal operation is very important, but the motor is running in many emergency situations often encountered such as the short circuit, overload and under voltage. In order to motor in the event of these conditions was not subject to damage, must take measures to keep the motor running clean and protected. the motor allowed to enter the water drops, oil, dust, etc., and periodically clear Motor dust inside and outside. Note should not exceed rated load current, check bearing heating, oil spills, etc., especially according to the provisions of fuel, motor can not exceed the rated temperature rise.

(2) the reasons forinduction motor induction motor overload overload causes divided into the following situations. ① the drag from the result of mechanical equipment. Such as irrigation and drainage machinery waterway obstruction, such as shaft misalignment, resulting in motor load is too large, or even block transfer. ② As the motor itself is caused by poor working conditions. Such as ventilation, high ambient temperature, electrical and other mechanical failure caused the motor overheating and reduce the level of insulation. Or short circuit. ③ As the poor quality of power supply network, such as low voltage, phase imbalance causes such as motor current increases.

(3) the correct selection of the basic principles of motor mechanical characteristics of motors, starting, braking, speed and other mechanical properties of the control performance should meet the requirements and production processes, motor work during the course of the quality of power supply (such as voltage fluctuations, Xie wave interference, etc.), should be within the limits;

(4) the basic technical requirements for motor motor basic technical requirements, including: ratings; work system and fixed; operating conditions; insulation class and temperature rise; dielectric properties ; shell protection grade; cooling method; structure and the installation form; line-side marking and rotation direction; appearance and installation dimension and tolerance; noise and vibration limit; electrical properties; working life or reliability; apparent mass; electrical safety performance.