CN101090215A

CN101090215A - q-5 forming coil symmetric unequal turn winding of three-phase asynchronous motor

Info

Publication number: CN101090215A
Application number: CN 200710103172
Authority: CN
Inventors: 王怀林
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-26
Filing date: 2007-04-26
Publication date: 2007-12-19
Anticipated expiration: 2027-04-26
Also published as: CN100593893C

Abstract

This invention relates to a symmetric non-equal turn winding of a q=5 molded coil of a three-phase asynchronous motor, in which, 60 slots are applied mostly in 4 pole molded coil stator, and q=5 for each pole and each phase, the general span is 1-13 or 1-14, and the harmonic seven for 1-13 is high yet harmonic five for 1-14 is high, this invention applies a symmetric non-equal turn winding, harmonic-five is zero and the harmonic-seven approaches to zero, so the performance of the motor can be improved, each of the molded coils is independent and resistance of the stator winding can be reduced if the lead section area of small turn number is amplified according to conductor number in the slots.

Description

Threephase asynchronous q=5 formed coil symmetry does not wait the circle winding

The technical field motor is made

Chen Wei is quiet in background technology Jinyang. and a bilayer does not wait the preferred arrangement of circle winding. and middle and small motor, copper factor optimizations such as 1994,21 (4): 14～17 employing uiform sections are different from the present invention.

Wei Aimin singly loves and respects Li Li. the research of the practical Sine distribution winding of three-phase. and middle and small motor, 1996,23 (1): 7～11.In the table 1 q=5 in the turn ratio coefficient of winding cosine distribution, be the data of span 1-11.Be different from span 1-13 of the present invention.

Wang Huailin. talk and be applicable to that symmetry does not wait the winding coefficient formula of circle. middle and small motor, 1996,23 (2): 28～29.Formula is arranged, parameter q+0.5-0.5Y (q is every extremely every phase groove number, and Y is the winding span) is arranged.Condition is provided for the flexible strategy visual techniques.

The summary of the invention formed coil is used for big motor and high-voltage motor.The formed coil winding of q=5 adopts 1-13 or 1-14 span.The 1-13 quintuple harmonics is zero, and the seventh harmonic is 0.088; The 1-14 quintuple harmonics is 0.1, and the seventh harmonic is 0.016.Invention utilization Excel flexible strategy visual techniques is carried out double-deck lap winding symmetry to it and is not waited circle optimization.Try to achieve under the 1-13 span, the turn ratio of 0.72/1/1.2/1/0.72, corresponding quintuple harmonics is zero, the seventh harmonic is 0.00007.Enforcement can improve motor performance.The in addition heavy in section variable cross-section winding of small turn number measure can further reduce winding resistance, improves electric efficiency.

Excel flexible strategy visual techniques layout: A2 is that every extremely every phase groove is counted q, and B2 is span Y, C2=A2+0.5-0.5*B2, and C3=C2+1 chooses C3 to be filled to C6 automatically, groove flexible strategy that Here it is.D2～D6 imports the corresponding number of turn (waiting circle also can get 1 entirely).D7＝SUM(D2：D6)。F1 input 1, G1 input 5, H1 input 7.F2=$D2*COS (F$1*3.1415926*$C2/3/$A$2) chooses F2 to be filled to F6 automatically.Groove flexible strategy effect that Here it is.F7=SUM (F2:F6) Here it is groove flexible strategy effect and.F8＝F7/$D$7。Choose F2 to be filled to H8 automatically to F8.F9＝COS((15-B2/A2)*3.1415926/3)，F10＝F8/F9。Literal in the layout and symbol: A1 is defeated to be: q, and B1 is defeated to be: Y, D1 is defeated to be: the number of turn or turn ratio, E1 is defeated to be: harmonic number, and E7 is defeated to be: right effectively series conductor number, E8 is defeated to be: winding coefficient (amplitude), E9 is defeated to be: short moment coefficient, E10 is defeated to be: breadth coefficient.

With to the explanation of 4 tables down, set forth and optimize.

Table 1,2,4th, the calculating that effective series conductor of 22 circles under 23 circles and the 1-14 span/23 circle schemes is counted result of calculation 104.6/102.9/107.6 and 5,7 subharmonic under the 1-13 span.Table 3 is the calculating that symmetry does not wait circle under the 1-13 span, and effectively the series conductor number is 106.3.Suppose that table 4 motor performance power factor has surplus, table 3 scheme is a table 1,2,4 replaceable scheme.Observing the contrast of 5,7 subharmonic is again desirable scheme only.By accompanying drawing groove inner wire number is 43/43/48/50/48.Table 3 his-and-hers watches 1 relative resistance coefficient has three schemes.1,50 circle and former 46 sectional areas maintain an equal level: 50/46*116/115=1.0964; 2,18 circles are put the cross section: (2*18/ (46-46/50*30)+(30+25*2) * 50/46)/115=1.0623; 3, each number of turn all accounts for half groove and is: (30*60/46+25*2*50/46+18*2*36/46)/115=1.0578, the cross section current density of 30 circles is not overtime desirable.Because being the absolute coil such scheme, each coil of formed coil winding easily goes.

Appended drawings has been expressed every extremely every phase groove and has been counted q=5, and the double-deck lap wound symmetry of coil spread Y=12 does not wait circle groove inner wire number: with 5 grooves is circulation section, and groove inner wire number is a+b/b+a/c+a/b+b/a+c.Can find out conveniently which groove inner wire counts maximum.

Embodiment is imported former scheme in the EXCEL layout, write down effective series conductor number.Look into former performance, determine new effective series conductor number, and determine scheme, or continue to seek prioritization scheme with the harmonic wave that provides the result of calculation of the concrete number of turn in the EXCEL layout according to the improvement direction target.Determine to adopt one of lead 3 schemes at last.

Scheme implementation can improve the electric motor starting performance, reduces vibration, noise, reduces assorted consumption, reduces temperature rise.Assorted consumption of big motor and copper loss maintain an equal level, and the big motor of all q=5 is implemented, and helps reducing greenhouse effect.

Table 3 his-and-hers watches 1 effective series conductor ratio is 1.0163 (make motor reduce iron loss, slightly increase rotor aluminium consumption).Economizing copper 0.082 (116/115*46/50=0.93) improves surveying assorted power consumption engine efficiency.

Claims

Formed coil is used for big motor and high-voltage motor.The formed coil winding of q=5 adopts 1-13 or 1-14 span.The 1-13 quintuple harmonics is zero, and the seventh harmonic is 0.088, and the 1-14 quintuple harmonics is 0.1, and the seventh harmonic is 0.016.Assorted consumption is more outstanding to the adverse effect of high-voltage motor and big motor.The assorted consumption effect that reduces the formed coil winding is also more outstanding.To q=5, use the 1-13 span, the symmetry of 0.72/1/1.2/1/0.72 does not wait the circle turn ratio, and can make quintuple harmonics is zero, and the seventh harmonic is 0.00007.If according to groove inner wire number, amplify the small turn number sectional area of wire, can reduce stator winding resistance, improve electric efficiency.

1, q=5, the span 1-13 turn ratio does not wait the double-deck lap winding of circle formed coil near the symmetry of 0.72/1/1.2/1/0.72.

2, q=5, the span 1-13 turn ratio does not wait the double-deck lap winding of circle formed coil variable cross-section near the symmetry of 0.72/1/1.2/1/0.72.