电风扇修理（Electric fan repair）.doc

电风扇修理（Electric fan repair） Apprentice: there are more and more electric appliances now. Would you please show me how to repair all kinds of motors in electric appliances? Teacher: household appliances used on most of the motor is to use 220 v ac mains power, capacitance type, cover a variety of types such as pole, the series type, structure and working principle of them is different. In addition, micro dc motor is used in some electrical appliances. You want to learn how to repair the motor, must combine the practice, not only must know the structure and the principle of various electric motors, more important is to need to operate, ability to learn the ability truly. Apprentice: I see a capacitor for electric motors used on electric machines, such as washing machines, electric fans, and electric planers. You can teach me how to repair this motor today. Master: this type of motor is most commonly used in household appliances. It is called capacitive operation motor. It has good operating performance, high efficiency and overload capacity, but the starting torque is smaller, so it is more important to start the easy electric appliances. Disciple: would you like to talk about the structure of this motor first? Master: single-phase capacitance motor consists of stator, rotor, front and rear end cover, bearing, etc. The coil which is made of enameled wire is also called winding. The capacitive motor has two windings, main and two. They are embedded in the stator slot according to the design position. The stator coil is the most vulnerable, and its winding, embedded, connected, insulated, and tested are strictly required. I will tell you about it later. Student: the rotor of the motor, which looks like an iron column, is made of silicon steel. Master: yes. The rotor silicon steel sheet has a closed groove and the upper and lower slots of the rotor are slightly staggered, forming the inclined trough, which can make the rotation more uniform and smooth. The rotor winding i