CN102983653A

CN102983653A - Single-layer short isometric winding of 48-slot 4-pole three-phase asynchronous motor

Info

Publication number: CN102983653A
Application number: CN201210439687XA
Authority: CN
Inventors: 朱运龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-07
Filing date: 2012-11-07
Publication date: 2013-03-20

Abstract

The invention relates to a single-layer short isometric winding of a 48-slot 4-pole three-phase asynchronous motor, belongs to the field of the structural design of motors, and aims at providing the single-layer short isometric winding which is capable of improving motor efficiency and saving wires, and is convenient to wind and simple in embedding the wires. All the pitches, shapes and sizes of coils in the single-layer short isometric winding of the 48-slot 4-pole three-phase asynchronous motor are the same. The pitches of the coils are 9, and the wires are embedded on the single-layer short isometric winding in an overlapping method, and the single-layer short isometric winding is connected in a salient pole connection method and is suitable for manufacturing and maintenance of the three-phase asynchronous motor provided with a stator which is provided with 48 slots and 4 poles. According to the single-layer short isometric winding of the 48-slot 4-pole three-phase asynchronous motor, the length of the end portion of the winding is shortened through changing of the pitches of the coils so as to shorten the total length of the coils and reduce stator resistance, and consequently copper consumption of the stator is reduced. Meanwhile, fifth subharmonics and seventh subharmonics severely affected in a magnetic field of the motor are significantly reduced, the phenomena of magnetic leakage are reduced, and consequently stray losses are lessened. Moreover, efficiency and performance of the motor are effectively improved, and compared with an existing single-layer winding, the wires are saved by about 15% and production efficiency is improved by 30%.

Description

The short equidistant winding of 48 grooves, 4 pole three phase asynchronous motor individual layers

Technical field

The invention belongs to the electric motor structure design field, relate generally to threephase asynchronous, especially the winding of 48 grooves, 4 pole three phase asynchronous motors.

Background technology

It is introduced that motor has consumed the electric power resource of China nearly 60% every year as a kind of universal industrial equipment.The enhancing of and environmental consciousness energy-conservation along with people, countries in the world have been put into effect Energy Efficiency Standard in succession, China has also enforced GB18613-2012 " middle-size and small-size threephase asynchronous efficiency limit value and efficiency grade " standard on September 1st, 2012, being the inexorable trend of social development so develop high-efficiency electric motor, also is the needs of enterprise participation market competition.Threephase asynchronous all is widely used in every field, and winding then is the heart of motor, is directly connected to the efficient of motor.Motor is in running, and stator copper loss accounts for 40% of total losses, is mainly the resistance loss of full load stator winding under operating temperature; Stray loss accounts for 10% of total losses, comprises 5,7 the most serious subharmonic of impact in the magnetic field, and these losses are relevant with factors such as winding configuration, pitch, winding overhangs.Improve the efficient of motor, will reduce various losses; And how to reduce stator copper loss and stray loss, then very crucial to the efficient that improves motor.Reduce stator copper loss and will reduce stator winding resistance; Reduce stray loss and will shorten winding overhang; Must adopt short equidistant winding to realize so reduce stator winding resistance and shortening winding overhang.Single stacked and individual layer concentric type is arranged in the single-layer stator winding type of existing 48 grooves, 4 pole three phase asynchronous motors, and these two kinds of winding types stator copper loss and stray loss have been difficult to reduce.

Summary of the invention

The objective of the invention is to provide a kind of can improve motor efficiency and save wire rod, convenient, the equidistant winding of the simple individual layer section of rule of coiling.The present invention is applicable to the manufacture and maintain that stator is 48 grooves, 4 pole three phase asynchronous motors.

Motor winding of the present invention is to shorten winding overhang length by changing coil span, and the coil total length is shortened, and stator resistance reduces, thereby has reduced stator copper loss; Significantly cut down simultaneously 5,7 the most serious subharmonic of impact in the motor field, and reduced leakage field, thereby reduced stray loss; Effectively raise efficient and the performance of motor.

The short equidistant winding of 48 grooves, 4 pole three phase asynchronous motor individual layers of the present invention is totally 12 groups of coils, and every group of coil is comprised of two coils; The pitch of all coils, shape and size are all identical, and coil span is 9; And adopt overlapping method rule and Salient pole connection to connect, hang 4 limits during rule; Embedding rule is: embed 1 groove, move back empty 1 groove; Embedding 1 groove moves back empty 1 groove more again, so analogizes; Its overlapping method rule sequentially sees the following form:

The invention has the beneficial effects as follows: when adopting motor winding of the present invention, reduced stator copper loss and the stray loss of motor, effectively raised efficient and the performance of motor; Simultaneously than existing single layer winding pattern save wire rod about 15%, enhance productivity about 30%.

Description of drawings

Fig. 1 is that stator is the wiring expanded view of the short equidistant winding of 4 pole three phase asynchronous motor individual layers of 48 grooves, and the Arabic numerals 1-48 among the figure is the number of stator slots of motor, and A1, A2, A3, A4, A5, A6, A7, A8 are 8 coils of A phase winding; B1, B2, B3, B4, B5, B6, B7, B8 are 8 coils of B phase winding; C1, C2, C3, C4, C5, C6, C7, C8 are 8 coils of C phase winding.

Embodiment

Below in conjunction with Fig. 1 implementation detail of the present invention is described as follows:

48 grooves, 4 pole three phase asynchronous motor individual layers are lacked equidistant winding totally 12 groups of coils as shown in Figure 1, every group of coil is comprised of two coils, coil span is 9, and the structure that embeds of each phase winding coil is: A1 embedding 1,10 grooves, A2 embedding 3,12 grooves, A3 embedding 13,22 grooves, A4 embedding 15,24 grooves, A5

embedding

25,34 grooves, A6 embedding 27,36 grooves, A7

embedding

37,46 grooves, A8

embedding

39,48 grooves; B1 embedding 5,14 grooves,

B2 embedding

7,16 grooves, B3 embedding 17,26 grooves, B4 embedding 19,28 grooves, B5

embedding

29,38 grooves, B6 embedding 31,40 grooves, B7 embedding 41,2 grooves, B8 embedding 43,4 grooves; C1 embedding 9,18 grooves, C2 embedding 11,20 grooves, C3 embedding 21,30 grooves, C4 embedding 23,32 grooves, C5 embedding 33,42 grooves, C6 embedding 35,44 grooves, C7 embedding 45,6 grooves, C8 embedding 47,8 grooves.

Claims

1.48 the short equidistant winding of groove 4 pole three phase asynchronous motor individual layers, it is characterized in that: described motor winding type is the short equidistant winding of individual layer, being applicable to stator is 4 pole three phase asynchronous motors of 48 grooves, and the pitch of all coils, shape and size are all identical in each winding, and coil span is 9.

2. 48 grooves, 4 pole three phase asynchronous motor individual layers according to claim 1 are lacked equidistant winding, it is characterized in that: the structure that embeds of each phase winding coil is: A1 embedding 1,10 grooves, A2 embedding 3,12 grooves, A3 embedding 13,22 grooves, A4 embedding 15,24 grooves, A5 embedding 25,34 grooves, A6 embedding 27,36 grooves, A7 embedding 37,46 grooves, A8 embedding 39,48 grooves; B1 embedding 5,14 grooves, B2 embedding 7,16 grooves, B3 embedding 17,26 grooves, B4 embedding 19,28 grooves, B5 embedding 29,38 grooves, B6 embedding 31,40 grooves, B7 embedding 41,2 grooves, B8 embedding 43,4 grooves; C1 embedding 9,18 grooves, C2 embedding 11,20 grooves, C3 embedding 21,30 grooves, C4 embedding 23,32 grooves, C5 embedding 33,42 grooves, C6 embedding 35,44 grooves, C7 embedding 45,6 grooves, C8 embedding 47,8 grooves.