CN85100103B - Stator conductor bar of the strand transposition being less than 360 deg. - Google Patents
Stator conductor bar of the strand transposition being less than 360 deg. Download PDFInfo
- Publication number
- CN85100103B CN85100103B CN85100103A CN85100103A CN85100103B CN 85100103 B CN85100103 B CN 85100103B CN 85100103 A CN85100103 A CN 85100103A CN 85100103 A CN85100103 A CN 85100103A CN 85100103 B CN85100103 B CN 85100103B
- Authority
- CN
- China
- Prior art keywords
- strand
- less
- transposition
- conductor bar
- stator conductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000017105 transposition Effects 0.000 title claims abstract description 20
- 239000004020 conductor Substances 0.000 title abstract description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000004907 flux Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 210000000689 upper leg Anatomy 0.000 description 10
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009954 braiding Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Windings For Motors And Generators (AREA)
Abstract
The present invention relates to a stator conductor bar with the transposition of less than 360 degrees, which belongs to a fabrication technology of hydraulic generators. The end of a stator conductor bar with the transposition of 360 degrees, which is close to the end of a strand, has large induced electromotive force and generates large circulating current to rising the temperature of the strand; although the induced electromotive force of the slot leakage flux of the stator conductor bar with the transposition of less than 360 degrees is also balanced, the unbalance of the induced electromotive force at the unbalance compensation end of the induced electromotive force of the slot leakage flux can cause current to be uniformly distributed and the temperature of the strand to be uniformly risen by selecting a proper transposition angle. The highest temperature rise of the strand can descend by 10 degrees more or less, stator copper loss generated by circulating current can descend by 30% more or less, force output is enhanced, and motor efficiency is enhanced. The stator conductor bar is suitable for manufacturing the stator conductor bars of water wheel motors.
Description
The invention belongs to the hydraulic generator manufacturing technology.
The positioning line rod transposition straight line portion of hydraulic generator is 360 degree transpositions at present, does not replace in the end.Its principle as seen, China Machine Press publishes, " design of electrical motor " volume two P170～P174 of Chen Shikun chief editor.This transposition line rod if first strand of conductor in the left part near notch, the still close notches in the right part replaces after 360 °.In like manner, n thigh lead in left and right end all near bottom land.Close end, rotor field induced potential produces circulating current greater than n thigh induced potential to first strand of conductor in the end.Make first strand of current in wire greater than n thigh current in wire, also greater than average current, the first strand temperature rise also is higher than average temperature rising.Electric current is skewness in strand, has produced supplementary load loss.
The present invention is in order to reduce the highest strand temperature rise of stator bar, to reduce the stator copper loss, improving motor and exert oneself and efficient.
When making stator bar, if adopt the method that does not replace less than 360 degree transposition ends, as shown in drawings.Though first strand of end conductor electromotive force be still greater than n thigh end electromotive force, because the slot part transposition is less than 360 degree, then first strand of conductor has not been near notch in the right part.In like manner, n thigh conductor in the right part neither be near bottom land.Compare when this makes the thigh of winning with n thigh electromotive force and 360 degree transpositions and be tending towards evenly reducing circulating current.Less than 360 degree transpositions, then the slot leakage flux induced potential no longer symmetrically simultaneously.In slot length 1 scope, be divided into three part a, b, c(as shown in Figure 1).First strand of a, c section equate with n thigh conductor induced potential.First strand of conductor of b section is near bottom land, and n thigh conductor is near notch, because kelvin effect n thigh conductor current has the trend of increase, the i.e. asymmetric inhomogeneous broadening effect that just compensates the end of slot part.By to end magnetic field, the slot part CALCULATION OF MAGNETIC FIELD INDUCED AROUND all can be determined one less than 360 degree transposition angles to each motor, and this angle is within 285～335 degree scopes.
Employing less than the highest strand temperature rises of line rod of 360 degree interchanging method manufacturings than the highest strand temperature rises of 360 degree transpositions can reduce by 10 degree (degree centigrade) about, stator copper loss can reduce about 30%.
Accompanying drawing has been represented a stator bar schematic diagram less than 360 degree transpositions.The line rod is by 2(n-1) braiding of strand conductor forms, two ends by and headgear with whole strand short circuits.Do not replace in the end, core length is that nearly air gap side depended in " notch " printed words among the figure.
We are to the end magnetic field of the generator in the Xinanjiang River 7.25 ten thousand.Calculate in slot part magnetic field, show to adopt 305 degree transpositions, the highest strand temperature rise than 360 degree transpositions can descend 20 degree (degree centigrade), stator copper loss can reduce by 50%.
Claims (1)
1, a kind of transposition stator bar of hydraulic generator, the transposition angular range that it is characterized in that the stator bar straight line portion are 285～304 degree or 306～335 degree, two ends by and headgear with whole strand short circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100103A CN85100103B (en) | 1985-04-01 | 1985-04-01 | Stator conductor bar of the strand transposition being less than 360 deg. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100103A CN85100103B (en) | 1985-04-01 | 1985-04-01 | Stator conductor bar of the strand transposition being less than 360 deg. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100103A CN85100103A (en) | 1986-08-20 |
| CN85100103B true CN85100103B (en) | 1988-08-17 |
Family
ID=4790887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100103A Expired CN85100103B (en) | 1985-04-01 | 1985-04-01 | Stator conductor bar of the strand transposition being less than 360 deg. |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100103B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19545307A1 (en) * | 1995-12-05 | 1997-06-12 | Asea Brown Boveri | Fixed stator winding rod with extended field compensation |
| CN102993351B (en) * | 2011-12-15 | 2015-06-24 | 上海容志材料科技有限公司 | Styrene and halogenated styrene copolymer and preparation method and application thereof |
-
1985
- 1985-04-01 CN CN85100103A patent/CN85100103B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100103A (en) | 1986-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |