In order to prevent torque reversal every time the coil passes through the motor perpendicular to the magnetic field plane, a motor commutator device is used to reverse the current at this point. At the same time, the electrical contacts of the rotating ring are called "brushes". With the advancement of technology, modern motors will choose to use spring-loaded carbon contacts.
Modern motor commutators are composed of a microprocessor controller, which in turn energizes/de-energizes each winding of the stator through energization to generate current. At the same time, the controller uses a closed-loop feedback mechanism to accurately control the magnetic field, thereby reducing the physical contact points in the moving parts of the motor.
Because of the high efficiency of the motor design, the motor commutator is very suitable for installations that require a constant design flow. At the same time, for motors with large parameter fluctuations, only the motor speed needs to be changed to match the variable load.
Because the motor commutator can be defined as a specific electric rotary switch type generator and motor, and is mainly used to reverse the direction of current between the external circuit and the rotor. At the same time in a DC motor, the commutator will provide current to the windings. By changing the direction of current in the rotating winding every half turn, torque will be generated.
When the DC motor is working, the armature current causes the set magnetic field to use rotational force, and at the same time torque is applied to the winding to make it rotate. And mechanical torque is applied in the direction of the shaft to maintain the movement of the armature winding through a fixed magnetic field, thereby stimulating the current in the winding.
At the same time, it can restore the mechanical performance, make the system easier to operate, and get rid of the easily damaged wires hanging on the variable joint, and it allows energy to flow between the two electrical rotating elements in the motor. Therefore, it is widely used in DC motors.