Why does the motor turn when the motor is turned on?. Say principle.
Basic structureI. The structure of the three-phase asynchronous motor consists of stator, rotor and other accessories.(1) stator (stationary part)1 stator coreAction: a part of a magnetic circuit of a motor, with stator windings placed on it.Structure: the stator core is generally made of 0.35~0.5 mm thick surface silicon steel sheet with insulating layer and is superposed and pressed, and the inner circle of the iron core is uniformly distributed with slots for inserting stator windings.
2 stator windingFunction: it is the circuit part of the motor, through the three-phase alternating current, produces the revolving magnetic field.Structure: it is made up of three identical winding structures which are separated from each other by 120 degrees electrical angles and symmetrically arranged in space. Each coil of these windings is embedded in each slot of the stator according to certain rules.The main insulation items of the stator winding are as follows: (to ensure the reliable insulation between the conductive part of the winding and the core and the reliable insulation of the winding itself); three.The ground insulation: insulation of stator windings and stator core of the whole.The interphase insulation: each phase stator insulation between the windings.The interturn insulation: each phase stator winding insulation between the turns.
There are several kinds of stator core groove:Semi closed slot: the efficiency and power factor of the motor are higher, but the winding and insulation are difficult. Generally used in small low-voltage motors.Semi open slot: can be inserted into the forming winding, generally used for large and medium-sized low-voltage motors. The so-called winding, winding that can be pre insulated treatment, and then into the groove.Open slot: used for inserting and forming winding, the insulation method is convenient, mainly used in high voltage motor.
Electric motor.An electric motor (Motor) is a device that converts electrical energy into mechanical energy. It is through the electric coil (i.e. stator winding) and produce a rotating magnetic field acting on the rotor (such as the squirrel cage closed aluminum frame) formed magnetoelectric rotary torque. Use the power of the motor according to the different DC motor and AC motor, motor power system in most of the AC motor can be synchronous or asynchronous motor (motor rotation speed of motor stator and rotor magnetic speed keeps synchronous speed). The motor is mainly composed of stator and rotor. The direction of force acting on the conducting wire in the magnetic field is related to the direction of the current and the direction of the magnetic induction line (the direction of the magnetic field). The working principle of the motor is that the magnetic field acts on the force of the current, so that the motor rotates.
