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The principle of the motor

Time: 2021-01-08

The motor, generally refers to the electric motor, also called the motor, is a very common thing in modern industry and life, and it is also the most important equipment for turning electrical energy into mechanical energy. Motors are installed in automobiles, high-speed trains, airplanes, fans, robots, automatic doors, water pumps, hard drives, and even our most commonly owned mobile phones.
Many people who are new to motors or have just learned the knowledge of motor dragging may find that the knowledge of motors is not easy to understand, and even see the relevant courses are very big, with the title of "credit killer". Through the scattered sharing, novices can quickly understand the principle of AC asynchronous motor.

Principle of motor:

The principle of the motor is very simple. Simply put, it is a device that uses electrical energy to generate a rotating magnetic field on the coil and drive the rotor to rotate. Anyone who has studied the law of electromagnetic induction knows that the energized coil will rotate in a magnetic field. This is the basic principle of the motor. This is the knowledge of junior high school physics.

Motor structure:

Anyone who has disassembled the motor knows that the motor is mainly composed of two parts, the fixed stator part and the rotating rotor part, as follows.

Stator (stationary part):

Stator core: an important part of the magnetic circuit of the motor, and the stator winding is placed on it Stator winding: it is the coil, the circuit part of the motor, connected to the power supply, used to generate the rotating magnetic field Frame: Fix the stator core and motor end cover, and play the role of protection, heat dissipation, etc.

Rotor (rotating part):

Rotor core: an important part of the magnetic circuit of the motor, the rotor winding is placed in the core slot Rotor winding: cutting the stator rotating magnetic field generates induced electromotive force and current, and forms electromagnetic torque to rotate the motor.