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Brush DC Motor Working Principle
- Oct 13, 2017 -

At present, the working principle of brush DC motor in the contemporary application can be described as more and more widely, Brush DC motor works is worth learning from us, and now we have a better understanding of the working principle of brush DC motor

Brush motor stator is equipped with a fixed main pole and brush, the rotor is equipped with armature windings and commutator. DC power supply through the brush and commutator into the armature winding, resulting in armature current, the armature current generated by the magnetic field and the main magnetic field interaction to produce electromagnetic torque, the motor rotation to drive the load. Due to the presence of brushes and commutators, the structure of the brush motor is complex, the reliability is poor, the fault is large, the maintenance workload is large, the life is short, and the spark is easy to produce electromagnetic interference.

Brush DC motor working principle diagram. In the fixed part of the brush DC motor has a magnet, here called the main pole; fixed part of the brush. The rotating part has a ring core and a winding wound around the toroidal core.

A fixed portion (stator) of a bipolar brush DC motor is provided with a pair of DC-excited static main magnetic poles N and S, and an armature core is mounted on the rotating portion (rotor). There is an air gap between the stator and the rotor. In the armature core placed by the A and X two conductors connected to the armature coil, the coil ends and ends were connected to two round copper plate, the copper is called commutator. The commutator segments are insulated from each other, and the whole of the commutator segments is called a commutator. The commutator is fixed on the shaft and the commutator and the shaft are insulated from each other. A pair of fixed rollers B1 and B2 are placed on the commutator segments, and when the armature rotates, the armature coil is turned on by the commutator segments and the brush and the external circuit.

In summary, this paper has to explain the working principle of brush DC motor, I believe everyone on the working principle of brush DC motor more and more in-depth understanding, I hope this article readers can have a greater reference value.



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