Motor principle

29/05/2019

A motor (commonly referred to as "motor") refers to an electromagnetic device that converts or transmits electrical energy in accordance with the law of electromagnetic induction. Its main function is to generate drive torque as a power source for electrical appliances or various machines.
The main function of the generator is to use electrical energy to convert into mechanical energy.
The motor consists essentially of an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor and other accessories. Under the action of the rotating magnetic field of the stator winding, it has a current passing through the armature squirrel cage aluminum frame and is rotated by the action of the magnetic field.

DC motor

A DC motor is a rotating electrical machine that converts DC electrical energy into mechanical energy (DC motor) or converts mechanical energy into DC electrical energy (DC generator). It is a motor that converts DC power and mechanical energy to each other.
When it is used as a motor, it is a DC motor that converts electrical energy into mechanical energy; when the generator is running, it is a DC generator that converts mechanical energy into electrical energy.

2. Stepper motor

A stepping motor is an open-loop control element stepping motor that converts an electrical pulse signal into an angular displacement or a linear displacement.
In the case of non-overload, the speed and stop position of the motor depend only on the frequency of the pulse signal and the number of pulses, and are not affected by the load change. When the stepper driver receives a pulse signal, it drives the stepper motor. The set direction is rotated by a fixed angle.

Stepper motor working principle

The stator winding produces a vector magnetic field as current flows through the stator windings. The magnetic field causes the rotor to rotate at an angle such that the pair of magnetic fields in the rotor coincide with the direction of the magnetic field of the stator.
When the stator's vector magnetic field is rotated by an angle. The rotor also turns an angle with the magnetic field. Each time an electrical pulse is input, the motor rotates an angle further.

3. One-way asynchronous motor

Asynchronous motor, also known as induction motor, is an AC motor that converts electromechanical energy into mechanical energy by the interaction of the air gap rotating magnetic field and the rotor winding induced current to generate electromagnetic torque.
The principle of single-phase asynchronous motor

In an AC motor, when the stator winding passes an alternating current, an armature magnetomotive force is established, which has a great influence on the energy conversion and operating performance of the motor.
Therefore, the single-phase AC winding is connected to the single-phase AC to generate the pulse magnetomotive force, which can be decomposed into two rotating magnetomotive forces of equal amplitude and opposite rotational speed, thereby establishing positive and negative in the air gap. Magnetic field and.
These two rotating magnetic fields cut the rotor conductors and generate induced electromotive forces and induced currents in the rotor conductors, respectively.

4. Permanent magnet motor

A permanent magnet motor is an electric motor that uses a permanent magnet to provide a magnetic field. Motor work requires two conditions, one for the presence of a magnetic field and the other for the presence of a moving current in the magnetic field.