CN201248000Y - Dispel winding asynchronous motor stator - Google Patents

Abstract

The utility model relates to a main structural component of a motor, in particular to a random winding asynchronous motor stator which solves the problems that the operation is complex, the difficulty is large, and the like because the end part of the prior stator coil is long, the occupation space is large, and the inserting winding structure is unreasonable. The motor stator comprises a stator iron core and a stator slot, wherein a stator winding composed of a plurality of coils is inserted in the stator slot, the end part of each coil adopts the arc transition mode, and the whole end parts of the coils are backwards bent; two effective sides of the coil of the first pitch are both inserted in the lower layer of the stator slot, and two effective sides of the coil of the last pitch are both inserted in the upper layer of the stator slot. The utility model changes the conventional coil structure and the inserted winding mode, solves the problems of less pole number of the motor and short inner diameter as well as large operation difficulty in relatively large pitch, effectively reduces the length of the end part of each coil, shortens the axial space size of the motor, not only meets the electromagnetic property of the original motor stator, but also optimizes the stator structure of the motor.

Description

Winding asynchronous motor stator looses

Technical field

The utility model relates to a kind of main structural components of motor, is specially the bigger diffusing winding asynchronous motor stators of span such as a kind of 2,4 utmost points.

Background technology

Known, under same frame bore situation, number of pole-pairs is few more, and the span of coil is big more, end winding is also just long more, and the end winding angle is more little, and respective end portions is short more, for example for 2 grades of motor, diameter of stator bore is 187mm, span 15 grooves, and end winding length is about 95mm; According to present general wire insertion technology method, few utmost point motor coil end such as 2,4 utmost points physical length often surpasses the overhang computational length simultaneously.

Key step is as follows during the conventional motors rule: at first the lower floor limit with first coil embeds in first groove, the limit, upper strata is placed in the other direction the notch of several λ+1 groove, and (wherein λ is the pitch of calculating with the groove number, just the distance that striden across in stator slot of the levels limit of a coil; β is relevant with the coil chording factor); Second coil lower floor limit embeds in second groove, and its limit, upper strata is placed on the notch of several λ+1 groove in the other direction; Embed stator core inside up to the lower floor limit of λ coil so repeatedly, and after the limit, upper strata of these coils can only wait the lower floor limit of the coil of last pitch to embed, could embed the limit, upper strata of first pitch interior loop; After λ+1 coil embedded the lower floor limit, its limit, upper strata just can embed in first groove, is placed on the top on first coil lower floor limit; The coil of a pitch to the last so repeatedly, when rule, need to be sling in the limit, coil upper strata of first pitch, the height of slinging is advisable with the lower floor limit that can embed last pitch coil, behind all lower floor limits of good last pitch coil of embedding, again with the limit, upper strata of the coil of first segment distance one by one in the embedded groove.

As shown in Figure 1, be example with a three-phase 2 utmost point asynchronous motors, number of stator slots 36 grooves, span 14, chording factor is 7/9, internal diameter 187 unshakable in one's determination; External diameter 327 unshakable in one's determination; The lower floor limit of the 1st coil is embedded in first groove, and its limit, upper strata is embedded in the 23rd groove; In the rule process, the limit, upper strata of the from the 1st to the 14th coil must be placed on surface unshakable in one's determination; When having only to the 15th coil, the limit, upper strata of coil just can be placed in the 1st groove; Since the 23rd coil, all must sling in the limit, upper strata of the coil of first pitch (the from the 1st to the 14th coil just), so that in lower floor's limit embedded groove of 36 coils of the 23rd coil to the.

The inconvenience of the coil of this version and rule mode is:

1, the limit, upper strata of the 1st pitch interior loop is placed on outside the stator slot, takies a large amount of inner spaces, makes troubles for the operation of other coils, causes the coil insulation damage during misoperation easily;

2, during last pitch rule, need sling in the limit, coil upper strata of first pitch, and the space of slinging is limited, and the rule difficulty of coil is very big, and coil embeds back shaping difficulty, causes shorted-turn fault easily; The 1st pitch coil sling simultaneously, also causes coil insulation to damage easily;

3, overhang length is longer, and the end occupation space is very big, makes the motor internal space increase, and the utilance of motor reduces; While to the bulk of motor and the requirement of weight strictness, causes the design of motor and manufacture difficulty to increase at special operation environments such as locomotives.

Summary of the invention

The utility model causes problems such as complicated operation, difficulty is big, coil insulation is fragile in order to solve existing asynchronous motor stator end winding rule unreasonable structure long, take up room big and stator coil, and a kind of winding asynchronous motor stator that looses is provided.

The utility model is to adopt following technical scheme to realize: winding asynchronous motor stator looses, comprise stator core, the embedded stator winding that constitutes with the coil of insulated conductor coiling by some that is placed with of stator slot on the stator core, innovative point of the present utility model is described each end winding arc transition, and the whole end of coil is bending-like backward.The end winding arc transition can effectively reduce end hypotenuse length, shortens the axial space size of motor, and with end winding backward bending can further reduce the axial space size of motor, the height after the bending is the bulk decision by stator core yoke portion.

When rule, two effective edges of the coil of described first pitch all are embedded in stator slot lower floor, two effective edges of the coil of last pitch all are embedded in the stator slot upper strata, like this, very naturally, first effective edge of intermediate rest coil is embedded in the stator slot upper strata, and second effective edge is embedded in stator slot lower floor.

Compared with prior art, the utility model has changed conventional loop construction form and rule mode, solved the few number of poles of motor, internal diameter little, when pitch is relatively large, the problem that operation easier is big, rule in this way, need not to hang handle, overhang can be arranged at the rear of core direction in space, effectively reduce tip lengths, shorten the axial space size of motor; Both satisfied the electromagnetic property of original motor stator, optimized the stator structure of motor again, reduced the technology difficulty of motor rule effectively, because the reduction of rule difficulty, also reduced the fault of motor turn-to-turn short circuit, having reduced the manufacturing cost of motor indirectly, is a kind of brand-new winding distributed architecture, and this structure can be used on all diffusing winding electric machines.

Description of drawings

Fig. 1 is the structural representation of original stator built-in line

Fig. 2 is the structural representation of coil described in the utility model

Fig. 3 is the end view of Fig. 2

Fig. 4 is a stator built-in line structural representation described in the utility model

Among the figure: the 23rd coil of 1-stator core 2-stator slot 3-the 15th coil 6-of the 1st coil 5-of coil 4-

Embodiment

Winding asynchronous motor stator looses, comprise stator core 1, the stator slot 2 embedded stator winding that constitute with the coil 3 of insulated conductor coiling by some that are placed with on the stator core, as shown in Figure 2, described each end winding arc transition, and coil 3 whole ends are bending-like backward.

During rule, embed coil in the stator slot successively in order, two effective edges of the coil 3 of first pitch all are embedded in stator slot 2 lower floors, two effective edges of the coil 3 of last pitch all are embedded in stator slot 2 upper stratas, in order shape is put the end layering in coil side embedding limit, require clear, the no sleet jump of orderliness, then end coil is carried out end banding, overhang is in the rear of core spatial arrangements.

Rule structure for better explanation stator faces described in the utility model, with a three-phase 2 utmost point asynchronous motors is example, describe, as shown in Figure 4, number of stator slots 36 grooves, span 14, chording factor is 7/9, internal diameter 187 unshakable in one's determination, the lower floor limit of 327, the 1 coils of external diameter unshakable in one's determination is embedded in the 1st stator slot lower floor, its limit, upper strata is embedded in the 23rd stator slot lower floor, and the like, in turn the 2nd two effective edges to the 14th coil are put into corresponding stator slot lower floor respectively, finish the rule of the coil of first pitch; The 15th limit, upper strata to the 22nd coil is embedded in corresponding stator slot upper strata, and the lower floor limit is embedded in stator slot lower floor; Put into the upper strata of corresponding stator slot respectively in turn to two effective edges of the 36th coil for the 23rd, finish the rule of last pitch coil.

Claims (2)

1, a kind of winding asynchronous motor stator that looses, comprise stator core (1), the embedded stator winding that constitutes with the coil (3) of insulated conductor coiling by some that is placed with of stator slot on the stator core (2), it is characterized in that described each end winding arc transition, and the whole end of coil (3) is bending-like backward.

2, the winding asynchronous motor stator that looses according to claim 1, two effective edges that it is characterized in that the coil (3) of first pitch all are embedded in stator slot (2) lower floor, and two effective edges of the coil of last pitch (3) all are embedded in stator slot (2) upper strata.

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