The stator assembly is a key component in the motor, which consists of windings, stator core and stator slots.
Reasonable design and manufacturing can improve the efficiency of the motor and reduce energy loss. In the manufacturing process of the stator assembly, attention to detail is required to ensure the stability and reliability of the stator assembly. The layout of the winding includes the number of layers, turns and slots of the winding. Reasonable layout can improve the efficiency of the motor, reduce harmonics and noise. The windings are usually fixed in the slots of the stator core by insulating glue or insulating paper to ensure the stability and reliability of the windings.
Distinguished by the shape of the stator winding and embedded wiring method
Stator winding according to the shape of the coil winding and embedded wiring is different, can be divided into two types of centralized and distributed.
1. Centralized winding The centralized winding generally consists of only one or several rectangular frame coils. After winding, it is wrapped and shaped with yarn tape, and then embedded in the core of convex pole after dipping and drying. DC motor, general-purpose motor excitation coil, as well as single-phase shaded-pole motor main pole winding are used in this winding.
2. Distributed winding Distributed winding motor stator without convex pole palm, each pole is one or several coils in accordance with a certain law embedded wiring coil group. According to the different forms of embedded wiring arrangement, distributed winding can be divided into concentric, iterative two types.
(1) Concentric winding
Concentric winding is the same coil group of several rectangular coils of different sizes, according to the same center of the position of the embedded one by one arranged in a zigzag pattern. Concentric winding is divided into single layer and multi-layer. General single motor and some small power three-phase asynchronous motor stator winding using this type.
(2) Iterative winding
Iterative winding is the shape and size of all the coils are exactly the same (single and double turn exception), respectively, to each slot embedded in a coil edge, and in the groove at the end of the outside of the phase by phase evenly distributed type. Iterative winding is divided into single-layer iterative and double-layer iterative two kinds. In each slot only embedded in a coil edge for a single layer of iterative winding, or single iterative winding; each slot embedded in two different coil groups of coil edge (divided into the upper and lower layers) for the double layer of iterative winding, or double iterative winding. Iterative winding due to the embedded wiring changes in different ways, there are single and double circle cross wiring arrangement and single and double mixed wiring arrangement of the points; in addition, from the end of the winding embedded in the shape known as the chain winding, basket winding, in fact, are iterative winding. General three-phase asynchronous motor stator winding is more often used iterative winding.
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