Electric motor maintenance is a rotating electric machine that converts electrical energy into mechanical energy. It mainly includes an electromagnetic winding or a distributed stator winding used to generate a magnetic field, and a rotating armature or rotor. Under the action of the rotating magnetic field of the stator winding, there is current passing through the effective edge of the stator winding and it is rotated by the magnetic field. According to the principle of motor reversibility, if there is no change in the structure of the motor, it can be used as both a motor and a generator. It is a machine that converts electrical energy into mechanical energy. Usually, the working part of an electric motor rotates, and this type of motor is called a rotor motor; There are also linear motors that move in a straight line, called linear motors.

Electric motors can provide a wide range of power, from milliwatts to kilowatts. Machine tools and water pumps require electric motors to drive them; Electric locomotives and elevators require electric motor traction. Fans, refrigerators, washing machines, and even various electric toys in family life cannot do without electric motors. Electric motors have been applied in various aspects of modern social life. The working principle of electric motors: Electric wires are subjected to force in a magnetic field. The motor itself is a labor-intensive product, and it is difficult to generate benefits if it cannot reach a certain production scale. Therefore, the industry's profits are very thin. There are about 300000 employees in the motor industry nationwide, and in 2003, the industry achieved a profit of only 280 million yuan. It is understood that even in some cost-effective enterprises, the net profit last year was less than 5%. Meanwhile, due to the poor production processes of most small enterprises, there are still a large number of substandard product quality issues in the motor industry. According to the survey, the average loss of defective products such as scrap, substandard products, and repaired products in China's electrical machinery enterprises is around 10%, while the unqualified level of electrical machinery enterprises in developed industrial countries abroad is generally 0.3%. In recent years, a group of enterprises with large production scale, good product level, quality, and advanced technical equipment have emerged in China's motor industry. However, there is no one whose product share can dominate the domestic market yet. Small and medium-sized motors have not yet formed a brand with international influence. The motor industry urgently needs to be re integrated and eliminated, which has become a development trend in the motor industry.