Specializing in the design and manufacture of automotive motor armatures and stators.

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Starter armature manufacturer: Common sense of armature

Release Time:

2022-11-21

   Starter armature manufacturer It indicates that the winding is the heart of the motor. Different motors, different manufacturers, and different processing technologies will correspond to different winding types. Different winding types are selected according to the specific characteristics to be implemented, requiring simple structure, convenient manufacturing and maintenance, and safe and reliable operation. The armature winding of a DC motor is the same as that of an AC motor. The relationship between the coils should make a certain number of conductors generate a large potential, saving non-ferrous metals and insulating materials as much as possible. However, it also has its unique features: the coils are connected by a commutator, and the connection relationship must ensure good commutation.

   The starter armature manufacturer said, The armature windings of DC motors can be divided into five types: single winding, lap winding, single wave winding, multiple wave winding, and frog winding, which is a mixed winding of lap winding and wave winding. A single lap winding is to connect the adjacent elements under the same magnetic pole in series, and the synthetic pitch y=yk=1 or -1. When winding this kind of winding, any two series-connected elements directly overlap the previous one, so it is called a lap winding. If y=yk=1, the winding moves to the right, which is called a "right-hand" winding; if y=yk=-1, the winding moves to the left, which is called a "left-hand" winding. Each element of the left-hand winding is connected to two short lines of the commutator, and more copper is used, so it is rarely used. Therefore, right-hand winding is often used in lap winding.

  In a lap winding, if the corresponding element sides of two series-connected elements are not different by one virtual slot, but by two, three, or approximately M virtual slots, then correspondingly, the commutator segments connected at both ends of each element are not adjacent commutator segments, but are separated by two, three, or approximately M commutator segments. If the commutator segments are connected in series according to this rule, only half of the total elements of the armature can be wound each time. Obviously, the lap winding consists of two, three, or usually m single lap windings.

   The starter armature manufacturer said, The characteristic of a single wave winding is that the two commutator segments connected at both ends of each element are far apart, and the synthetic pitch y=yk is greater than y1. After two elements are connected in series, they are wave-shaped, so they are called wave windings. The difference between it and the lap winding lies in the commutation pitch yk: since the induced electromotive forces of the two series-connected elements should be in the same direction, the corresponding sides of the two series-connected elements should be under the same polarity magnetic pole, so the commutation pitch is approximately equal to two pole pitches. Its di pitch is close to or equal to one pole pitch, just like the lap winding.

  In a wave winding, if P (pole pairs) elements are connected in series after winding around the armature, the commutator segments that are differentially connected are not adjacent to the starting commutator segment, but are separated from it by 2, 3, or M segments, then the resulting winding is equivalent to a combination of 2, 3, or M single wave windings, which is called a multiple wave winding.


Starter armature

09-13

2022

Methods for winding the armature of a DC brushless automotive motor

The method for winding the armature winding of a DC brushless car motor is to leave a section of the cable end free and tie it tightly to the shaft. Hold the car armature with one hand, and wind the coil inductance clockwise with the other hand. Taking a five-slot armature as an example, the first coil is 1-5, the second coil is 2-6, then 3-7..., and so on. The sides of many components are on the next layer. The 5-9 components have one side on the next layer and the other side on the top layer. The sides of many components are on the top layer. In order to ensure the insulation between the top layer and the next layer components, it is advisable to place 0.1-0.15mm thick insulating paper pads in between. When the coil inductance in the slot reaches a certain level, a crossbar is needed to make it reach the bottom of the slot. When winding the coil inductance, the wire should be tightened first. Whether in the slot or the wire connection part, it is necessary to prevent the occurrence of crossed turns to prevent excessive space occupation and short circuit between turns due to partial stress of the wire. After all the windings are wound, the wire ends of the same winding component are bundled together, then the insulation layer of the wire connector is removed, different color waterproof sleeves are used, and they are embedded in the corresponding commutator segments. The important role of the armature in a DC brushless motor: DC motor,

08-22

2022

Design rules for automotive armatures

Automotive armature manufacturers indicate that single-layer windings are not suitable for large-capacity motors, and small-capacity motors should not be double-layered. The magnetic flux density of the motor core should not be too high or too low. When the frequency and thickness of the silicon steel sheet core material are constant, the iron loss depends on the magnetic flux density. If the magnetic flux density is too high, the iron loss increases, and the motor efficiency decreases. The increased heat from the iron core increases the motor temperature, and the increased excitation power increases the motor power factor, so the magnetic flux density of the core should not be too high. Try to avoid excessive saturation of the magnetization curve. If the magnetic density is too low, it will increase the amount of motor material used, increasing the cost. The rotor teeth are narrow, the magnetic density is high, the slot entry wire is large, that is, the automotive armature slots are large. Automotive armature manufacturers indicate that due to poor air conduction, there are many gaps in the slots, affecting the coils and easily damaging the heat dissipation of the insulation material, accelerating the increase in motor temperature. The slot fill factor of the motor slots cannot be too high or too low. Usually, the slot fill factor for low-speed motors is 75% to 85%, which can effectively prevent the enamelled wire from loosening in the slots. The design of the motor rotor slot shape should use parallel trapezoidal recesses as much as possible, and the edges of the recesses should not have sharp corners. Try to use a circular bottom recess, because the circular slot is filled with aluminum, which is easy to injection mold and the stator chip is easy to insert. The coil current density should not be...

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