CN201904670U

CN201904670U - Fractional slot single-layer and double-layer lap winding of servo permanent magnet synchronous motor

Info

Publication number: CN201904670U
Application number: CN2010206436609U
Authority: CN
Inventors: 林政安
Original assignee: Tellhow Sci Tech Co Ltd
Current assignee: Tellhow Sci Tech Co Ltd
Priority date: 2010-12-06
Filing date: 2010-12-06
Publication date: 2011-07-20
Anticipated expiration: 2020-12-06

Abstract

A fractional slot single-layer and double-layer lap winding of a servo permanent magnet synchronous motor is structurally characterized in that the number of stator slots is thirty, the number of poles is eight, the number of phases is three, the number of slots at each pole and each phase is five fourths, and a stator winding is designed into a single-layer and double-layer lap winding, each phase comprises eight coils, the winding pitch of each coil is four, the number of turns of each of four coils is n, and the number of turns of each of the other four coils is 2n, the turn ratio of two groups of coils is 1:2, open coils are connected in parallel to form each coil, three phases are distributed symmetrically to form the single-layer and double-layer lap winding, ten of thirty slots are in a single layer structure, the other twenty slots are in a double layer structure, thirty stator punching slots correspond to the thirty stator slots and are formed by two kinds of slots, twelve slots are large and the other eighteen slots are small. The fundamental wave winding coefficient of the special fractional slot single-layer and double-layer lap winding is 0.75% higher than that of a conventional lap winding, and the magnetic potential harmonic wave is 60.3% lower than that of the conventional lap winding, and inserting winding technology of coil manufacturing is identical with the conventional lap winding, and accordingly, vibration, noise and temperature rise of a motor in conventional design are reduced, and efficiency is improved and torque is lengthened.

Description

The double-deck repeatedly winding of servo permanent magnet synchronous motor fractional-slot list

Technical field

The utility model relates to a kind of motor winding, the double-deck repeatedly winding of specifically a kind of servo permanent magnet synchronous motor fractional-slot list.

Background technology

The general power of servo permanent magnet synchronous motor is little, volume is little, number of poles mostly is 6 utmost points, 8 utmost points, 10 utmost points, the groove number is few, so every extremely every phase groove number mostly is mark, its three phase winding is generally by traditional fractional-slot short distance design, 3 motors of 8 utmost points, 30 grooves mutually for example, and every extremely every phase groove number is 5/4, generally be designed to two repeatedly three phase windings that 1-4 is short distance=4/5 by span, this winding 5 subharmonic are slackened, but 7,11,13 subharmonic are big, and are big owing to the harmonics of magnetic force during frequency control, the magnetic potential sine is poor, the motor oscillating noise is big, and the harmonic wave iron loss is big, temperature rise, moment is little, and this situation wishes to improve by the new design of winding.

Summary of the invention

The purpose of this utility model is exactly at above-mentioned situation, the double-deck repeatedly winding of a kind of servo permanent magnet synchronous motor fractional-slot list is proposed, reach can be simultaneously to 5,7,11,13,17,19 subharmonic can both bigger weakening purpose, make the magnetic potential sine good, the motor oscillating noise reduces, temperature rise reduces, the purpose that output torque steadily also improves.

The utility model is achieved like this: the every coil that is 1-5 by 8 spans of motor is formed, and wherein the number of turn of 4 each coils of coil is n, and the number of turn of other 4 coils then is 2n, and 120 ° of 3 phase mutual deviations constitute 3 symmetrical single double-deck repeatedly winding constructions.The winding of Gou Chenging makes and is single layer winding in 10 grooves in 30 grooves like this, be two layer winding in 20 grooves, stator core by stator punching repeatedly pressure form, iron mandrel is to oblique half slot pitch, the stator punching upper punch has 30 grooves, is two kinds of grooves, distributes by large and small, little, large and small rule.

Advantage of the present utility model: 1, realized that every extremely every phase groove number is 5/4 single double-deck repeatedly winding, 1/3 groove number is an individual layer, has saved insulating material, has increased radiating effect; 2, this single double-deck winding magnetic potential sine that changes is good, 5,7,11,13,17,19 subharmonic all there is bigger weakening, reach positive chorded winding requirement, and it is littler than not waiting circle concentric type list two layer winding span, the end is short, save electromagnetic wire and reduce reactance, technology is simpler, and is in full accord with the tradition winding technologe that changes; 3, corresponding with it stator punching is big sulculus structure, has saved groove area, has made full use of the magnetic conduction cross section, has improved the flushing technology of punching, has increased the width of tooth.

Description of drawings

Fig. 1 is a winding layout plan of the present utility model.

Fig. 2 is stator laminating structure figure of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is described further

Embodiment is a kind of servo permanent magnet synchronous motor, power 22Kw, voltage 330v, 3 phases, Y connects, rated current 45A, and rated speed 2000r/min, stator slot are 30 grooves, number of poles is 8 utmost points, and every extremely every phase groove number is 5/4, and rotor is permanent magnetism cutting orientation structure (concrete incomplete structure statement).

As shown in Figure 1, number of stator slots is 30 grooves, and number of poles is 8 utmost points, and every extremely every phase groove number is 5/4, is fractional-slot, 3 symmetrical layouts, and wherein u phase outlet slot marker is uu.By 8 coil 1-5,2-6; 9-13,10-14; 16-20,17-21; 24-28,25-29 form, and are the open ended coil series connection, 1-5 wherein, 10-14,16-20, every circle 4 circles of four coils of 25-29 (n circle), 2-6,9-13,17-21, four coils of 24-28, every circle are 8 circles (2n circles), and the pitch of 8 coils all is 4, and the turn ratio is 1:2.V phase (vv in like manner.), w phase (ww.) all form by 8 coils, pitch all is 4, and turn ratio relation all is 1:2, and rule and layout and u be (uu mutually.) identical, but u, v, 120 ° of w three phase position mutual deviations constitute three symmetrical single double-deck repeatedly windings.For clarity sake, marked vv among Fig. 1 ₀, ww ₀Go out line position.

As shown in Figure 2, stator punching, outside diameter 181, interior circular diameter 110, stator slot are 30 grooves, and 12 vats are wherein arranged, 18 sulculuses, 30 grooves are composed of groove number on the stator punching,

According to

groove numbers

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28, the big sulculus distribution provisions of 29,30 order is big, little, little, and is big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; The flute profile of all vats is identical, and the flute profile of all sulculuses is identical, number rolls off the production line according to groove and has just determined concrete structure of the present utility model fully.

The distribution of this big sulculus, with the big sulculus of general single-phase integer groove sinusoidal design of Windings is the different of continuous distribution, also different with general non-salient pole alternator or sinusoidal big sulculus (or the big or small tooth) distribution mode of motor magnetic pole, but according to the double-deck repeatedly feature of winding of the fractional-slot list big sulculus that distributes, purpose is to make full use of magnetic conductive area, makes copper factor identical, and does not waste slot space, make temperature rise reduce, leakage field is few.

To the three-phase Analysis on Magnetic Potential, fundamental wave winding coefficient improves 0.75% as can be known, and the harmonics of magnetic force has reduced 60.3%, motor oscillating, noise, temperature rise are obviously reduced, and efficient improves, and the output torque characteristic is better, novel by above-mentioned technical application, reached the purpose of this utility model.

Claims

1. double-deck repeatedly winding of servo permanent magnet synchronous motor fractional-slot list, it is characterized in that stator slot is 30 grooves, number of poles 8 utmost points, the number of phases 3 phases, every extremely every phase groove number is a mark 5/4, this fractional slot winding, whenever, form by 8 coils, the pitch of each coil all is 4, and wherein 8 coils of u phase winding are 1-5,2-6; 9-13,10-14; 16-20,7-21; 24-28,25-29 are the open ended coil series connection, and 1-5,10-14,16-20, four coils of 25-29,4 circles weekly, 2-6,9-13,17-21, four coils of 24-28,8 circles weekly, the coil turn turn ratio of two kinds of same pitch has the fixed relationship of 1:2, the v phase, w phase rule is mutually identical with u, 120 ° of three-phase mutual deviations, constitute the double-deck repeatedly winding of fractional-slot list, three phase winding symmetries, Y connects and draws.

2. the double-deck repeatedly winding of a kind of according to claim 1 servo permanent magnet synchronous motor fractional-slot list is characterized in that motor stator punching is 30 grooves, is big sulculus structure, according to groove numbers 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28, the big sulculus distribution provisions of 29,30 order is big, little, little, and is big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; Greatly, little, little, big, little; The flute profile of all vats is identical, and the flute profile of all sulculuses is identical.