What is the working principle of the motor?

- Oct 18, 2018 -

What is the working principle of the motor?

 

DC Roller Shutter Motors.jpgA motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. It is indicated by the letter M in the circuit. Its main function is to generate drive torque as a power source for electrical appliances or various machines. The generator is indicated by the letter G in the circuit. Its main role 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.


The stator winding produces a vector magnetic field as current flows through the stator windings. The magnetic field causes the rotor to rotate 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. The angular displacement of the output is proportional to the number of pulses input, and the rotational speed is proportional to the pulse frequency. Changing the order in which the windings are energized, the motor will reverse. Therefore, the number of control pulses, the frequency, and the energization sequence of the windings of each phase of the motor can be used to control the rotation of the motor.