Motor is widely used, many kinds, d

Motor is widely used, many kinds, different performance, classification methods are also many.(1) according to the structure and working principle, dc motor can be divided into brushless dc motor and brushless dc motor.(2) brush dc motor can be divided into permanent magnet dc motor and electromagnetic dc motor.(3) the electromagnetic dc motor can be divided into series dc motor, parallel dc motor, other dc motor and compound dc motor.(4) permanent magnet dc motor business division: rare earth permanent magnet dc motor, ferrite dc motor.One part is a fixed electron, the other part is a rotatable rotor. There is a small air gap between the stator and the rotor.The rotor is the rotating part of an asynchronous motor. Under the action of rotating magnetic field of stator windings, a certain torque is obtained and rotated. It drives other types of equipment through couplings or pulleys. The rotor consists of a rotor core, a rotor winding and a rotor shaft. The squirrel cage rotor is simple in structure, convenient in manufacture, economical and practical.Its main function is to support the stator core and bear the reaction force generated during the operation of the motor load. Small and medium-sized motors are generally made of cast iron. The stator core is close to the inner wall of the frame.Such as whether the components are damaged, whether the use is flexible, whether the contacts are in good contact, whether the wiring is correct and firm, etc.(3) whether the fuse specification is appropriate, whether the installation is firm, whether there is a fuse or damage(4) whether the connector on the motor terminal board is loose or oxidized(5) check the transmission device, such as whether the belt is tightened, whether the connection is firm, whether the coupling screws, coupling screws and pins are tightened, etc.(6) drive the motor rotor and load shaft to see if it can rotate flexibly.(7) check whether the motor starter housing is grounded, whether the ground wire is opened, whether the ground screw is loose or falling off, etc.(8) remove debris around the motor and dust and oil on the base surface(9) check whether the loader is ready to start(5) when starting, if the rotation direction of the motor is opposite, the power supply should be cut off immediately and the position of any two three-phase power lines should be changed to change the rotation direction of the motor.(2) drop 2-3 drops of water on the motor housing. If the hot gas doesn't make a sound, it means the engine isn't overheating.Motor equipment in the operation of the process will often produce a certain odor. Judging the location of abnormal odor by odor can also improve the accuracy of fault handling.