Detail the working principle of cheap small 12v dc motor
Introduction to the working principle of permanent magnet DC motor:
The permanent magnet DC motor has the characteristics of simple structure, reliable operation, small volume, light quality, etc.. It is smaller than the same type of motor loss, high efficiency, and the shape and size of the motor can be designed in various ways.
The permanent magnet DC motor is equipped with a fixed main magnetic pole and a brush on the stator of the brush motor. The commutators are insulated from each other. The whole body composed of commutators is called a commutator. There are magnets in the fixed part of the permanent magnet DC, which is called the main magnetic pole and the fixed part also has a brush. The commutator is fixed on the shaft, and the commutator and the shaft are also insulated from each other. A pair of stationary brushes B1 and B2 are placed on the commutator. When the armature rotates, the armature coil is connected to the external circuit through the commutator and the brush. Turn the motor to drive the load. The magnetic field interacts with the main magnetic field to produce electromagnetic torque. The rotating part has a circular core and a winding around the ring core.
The permanent magnet DC motor is equipped with an armature core on the rotating part(rotor). There is an air gap between the stator and the rotor due to the presence of a brush and a commutator. The structure of the brush motor is complex, and the armature winding and commutator are installed on the rotor. The electric energy of DC power supply enters the armature winding through the brush and the commutator, and the commutative spark produces electromagnetic interference easily. Generate armature current, armature current generated. An armature coil connected by two conductors A and X is placed on the armature core. The front end and end of the coil are connected to two arc-shaped copper plates, which are called commutators.
Permanent magnet DC motors are widely used in all walks of life. Permanent magnet DC motors are used in cars, motorcycles, electric bicycles, printers, scanners and even stage lights, spacecraft, ships, aircraft, and tanks.
