DC reduction motor DC motor 37GB-555

Current reduction motor/DC motor,
Voltage/specification series
Scope of application micro motor
Structure of DC motor
As can be seen from the schematic diagram of the working principle of DC motor and generator, DC motor The structure should be composed of two parts: the stator and the rotor. The stationary part of the DC motor when it is running is called the stator. The main function of the stator is to generate a magnetic field. It consists of a base, main magnetic pole, commutation pole, end cover, bearing and brush device. The part that rotates during operation is called the rotor. Its main function is to generate electromagnetic torque and
induced electromotive force. It is the hub for energy conversion of the DC motor, so it is usually also called the armature. It consists of the rotating shaft, the armature core, and the electric motor. It is composed of pivot group, commutator and fan. The main magnetic pole of the stator is used to generate the air gap magnetic field. The main
magnetic pole consists of two parts: the main magnetic pole core and the excitation winding. The iron core is generally made of silicon steel plates that are stacked and riveted. It is divided into two parts: the pole body and the pole shoe. The upper part with the excitation winding is called the pole body, and the lower part widened is called the pole shoe. The pole piece is wider than the pole body, which can not only adjust the distribution of the magnetic field in the air gap, but also facilitate the fixation of the excitation winding. The field winding is made of insulated copper wire and is placed on the main magnetic pole core. The entire main magnetic pole is fixed on the machine base with screws. Commutator brush device, main magnetic pole of the machine base
Pole commutation pole cover, fan armature winding, armature core) commutator pole. The function of the commutator pole is: Improve the commutation and reduce the commutation sparks that may be generated between the brushes and the commutator when the motor is running. It is generally installed between two adjacent main magnetic poles
and consists of the commutation pole core and the commutation pole winding. Composition, as shown. The commutation pole winding is made of insulated wires and is placed on the commutation pole core. The number of commutation poles is equal to the main magnetic pole. Frame The shell of the motor stator is called the frame, as shown in the figure. The base has two functions. One is to fix the main magnetic pole, change the structural pole and end cover of the main magnetic pole, and play a supporting and fixing role for the entire motor. The main magnetic pole excitation winding base is the machine base. It is also a part of the magnetic circuit, which forms the magnetic path between the magnetic poles. The part through which the magnetic flux passes is called the yoke. In order to ensure that the machine base has sufficient mechanical strength
and good magnetic permeability, it is generally made of steel castings or welded by steel plates. ) Brush device The brush device is used to introduce
or draw out DC voltage and DC current, as shown in the figure. The brush device consists of a brush, a brush holder, a brush rod and a brush rod holder. The brush is placed in the brush holder and pressed with a spring to ensure 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 ring. The shaped brush stem seats must be insulated from each other. The brush rod seat is installed on the end cover or the inner cover of the bearing. The circumferential position can be adjusted
and fixed after adjustment. Figure commutation pole figure brush device commutation pole iron core brush holder brush
commutation pole winding compression spring brush braid rotor (armature) armature core armature core is the main part of the magnetic circuit
part, which is also used to embed the armature winding. Generally, the armature core is made of silicon steel sheets punched and laminated (the shape of the punched sheets is as shown in the figure to reduce the eddy current loss and hysteresis loss generated in the armature core when the motor is running< br/>. The stacked iron core is fixed on the rotating shaft or rotor bracket. The outer circle of the iron core has an armature slot, and the armature winding is embedded in the slot. Armature
The function of the winding armature winding is to generate electromagnetic torque. and induced electromotive force, which are the key components of DC motor for energy conversion, so it is called armature. It is composed of many coils (hereinafter referred to as components) connected according to certain rules. The coils are wrapped with high-strength enameled wire or glass fiber< br/> It is made of flat copper wire, and the coil sides of different coils are divided into upper and lower layers and embedded in the armature slot. The coil and the iron core and the upper and lower layers of coil sides must be properly insulated. In order to prevent the centrifugal force from throwing the edge of the coil out of the slot, the slot opening is fixed with a slot wedge, as shown in the figure. The terminal part of the coil protruding out of the slot is bound with a thermosetting non-weft glass tape. Commutator in DC motor , the commutator
is equipped with brushes, which can convert the external DC power into the alternating current in the armature coil, making the direction of the electromagnetic torque constant. In the DC generator, The commutator is equipped with brushes, which can convert the alternating electromotive force induced in the armature coil into DC electromotive force induced on the positive and negative brushes. The commutator is a cylinder composed of many commutating segments. The commutator segments are insulated with mica sheets. The structural pieces of the commutation diagram armature slot
are usually fastened as shown in the figure. The lower part of the commutator segments is made into a dove slot wedge coil insulated armature conductor
The body is tail-shaped, and both ends are fixed with steel shaped sleeves and shaped mica rings, and then the interlayer insulation groove is used to insulate the bottom of the groove
and the nut is locked.) The rotating shaft plays a supporting role in the rotation of the rotor and requires a certain amount of machinery. Strength and stiffness
Generally made of round steel. Figure Commutator structure diagram Single stack winding element commutator segment connection part
First end end element side termination part commutator segment