(1) Main magnetic pole
The role of the main pole is to generate an air gap magnetic field. The main magnetic pole is composed of the main magnetic pole core and the excitation winding. The iron core is generally made of 0.5mm～1.5mm thick silicon steel plate punched and riveted. It is divided into two parts: the pole body and the pole shoe. The shoe, the pole shoe is wider than the pole body, can adjust the distribution of the magnetic field in the air gap, and is convenient for fixing the excitation winding. The field winding is made of insulated copper wire and sleeved on the core of the main magnetic pole. The entire main magnetic pole is fixed on the base with screws,
(2) Reversing pole
The function of the commutation pole is to improve the commutation and reduce the possible commutation spark between the brush and the commutator when the motor is running. It is generally installed between two adjacent main magnetic poles. The commutation pole core and the commutation Polar winding composition. The commutating pole winding is made of insulated wire and sheathed on the commutating pole core, the number of commutating poles is equal to the main magnetic pole.
(3) Base
The housing of the motor stator is called the base. There are two functions of the base:
One is to fix the main magnetic pole, commutation pole and end cover, and to support and fix the entire motor;
The second is that the base itself is also a part of the magnetic circuit, so as to form a magnetic path between the magnetic poles, the part through which the magnetic flux passes is called a yoke. In order to ensure that the machine base has sufficient mechanical strength and good magnetic permeability, it is generally made of cast steel or welded by steel plates.
(4) Electric brush device
The brush device is used to introduce or draw DC voltage and DC current. The brush device is composed of a brush, a brush holder, a brush rod and a brush rod seat. The brush is placed in the brush holder and compressed with a spring to make a good sliding contact between the brush and the commutator. The brush holder is fixed on the brush rod, and the brush rod is mounted on the circular brush rod seat. Must be insulated between. The brush rod seat is installed on the end cover or the inner cover of the bearing, and the circumferential position can be adjusted and fixed after adjustment.