
Motor is a rotary machine, it will transform electrical energy into mechanical energy, which includes a solenoid winding to generate magnetic fields, or distribution of the Motor Stator windings and a rotating armature or rotor, a current through the wire and the magnetic field of leaving the role of rotation, some types of these machines can be used for Starter Motor , generators can be used. It is the electrical energy into mechanical energy of a machine. Usually part of the motor for the power for rotation, the rotor of this motor is called motor; there in a straight line, called linear motor. Motor can provide power range widely, from milliwatts to kw. Motor is very easy to use and control, self-starting, acceleration, braking, reversing, valves and shelter capacity, to meet various operational requirements; high efficiency motor, no smoke, odor, pollution, noise is also smaller. Because it’s a series of advantages, so in industrial and agricultural production, transportation, defense, commercial and household appliances, medical electrical equipment and other aspects of wider application.
(A) the stator (stationary part)
1, stator core
Role: magnetic Motor Parts, and in its place on the stator windings.
Construction: stator core is generally from 0.35 to 0.5 mm thick insulating layer of silicon surface with punching, layers formed in the core of the red circle with uniformly distributed within the slot to put the embedded stator windings.
2, the Stator Windings
Role: is the motor part of the circuit, leads to three-phase alternating current, a rotating magnetic field.
Structure: three each in the space across the 120 ° electrical angle, the same team that arranged the structure of winding connection is made, the individual coil windings, respectively, according to certain rules embedded in the slot on the stator.
3, base
Role: before and after the fixed stator core and end caps to support the rotor, and from the protection, heat and so on.
Construction: Frame is usually cast iron, large-scale asynchronous motor base plate welded into general use, micro-motor base cast aluminum parts. Closed motor base out there to increase the thermal heat tendon area, protective motor cover open at both ends of the base has ventilation holes so the motor can be directly convection of air inside and outside, to facilitate cooling.
(B) Motor Rotors (rotating part)
1, three-phase induction motor rotor core:
Role: As part of the motor magnetic circuit and placed in the rotor winding core slot.
Structure: the same materials used and the stator, from 0.5 mm thick silicon steel punching, layers made of silicon steel cylindrical punch with evenly distributed holes for placement of the rotor windings. Usually with silicon steel stator core within a red circle behind the rotor core to Punch. Generally small induction motor rotor core mounted on the shaft direct pressure on the large and medium-sized induction motor (rotor diameter of 300 to 400 mm) of the rotor core is pressed through the rotor shaft on the bracket.
2, three-phase induction motor rotor winding
Effect: cutting the stator rotating magnetic field induced electromotive force and current, and the formation of leaving the motor electromagnetic torque rotation.
Construction: divided into squirrel-cage rotor and wound rotor.
(C) three-phase asynchronous motor other accessories