CN102916513A - Motor winding capable of effectively increasing turn-to-turn insulation capacity - Google Patents
Motor winding capable of effectively increasing turn-to-turn insulation capacity Download PDFInfo
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- CN102916513A CN102916513A CN 201210396457 CN201210396457A CN102916513A CN 102916513 A CN102916513 A CN 102916513A CN 201210396457 CN201210396457 CN 201210396457 CN 201210396457 A CN201210396457 A CN 201210396457A CN 102916513 A CN102916513 A CN 102916513A
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Abstract
The invention belongs to the field of motor manufacturing and aims at solving the technical problem that three turns of coils at the head end in a winding of the traditional frequency conversion motor or the motor with frequent on-off characteristic requirement are easy to break down by instant high-voltage. A motor winding capable of effectively increasing the turn-to-turn insulation capacity, provided by the invention, comprises a plurality of serial-connection branches which are formed by turns of coils coiled by enamelled wires. The motor winding is characterized in that an insulating sleeve or an insulating film is respectively arranged or coated on the enamelled wires of multiple turns of coils at the head end and the tail end of each serial-connection branch. According to the motor winding disclosed by the invention, the insulating sleeves or insulating films which are arranged or coated on the enamelled wires at the head end and the tail end of each serial-connection branch can play a favorable reinforcement effect in the turn-to-turn insulation property of the motor adopting corona-resistant enamelled wires and thick-film enamelled wires; a feasible insulating measure is also provided for extended application of common electromagnetic wires in frequency-conversion power supply occasions and the winding with frequent on-off characteristic requirement.
Description
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Technical field
The invention belongs to field of motor manufacturing, relate generally to and a kind ofly be applied in variable-frequency motor or the motor winding that can effectively increase the turn-to-turn insulation ability in the motor of frequent power on/off characteristic demand is arranged.
Background technology
In the variable-frequency motor field, the main failure mode of winding is the turn-to-turn voltage breakdown, finds that through large quantity research the transient peak overtension is the principal element that causes the breakdown between adjacent turns accident.In the same series arm of winding, head end 1-3 circle bears voltage and can reach more than 80% of applied voltage peak value under certain transient state, wherein bears maximum, the second circle and the 3rd circle with first circle and successively decreases, and all the other circle voltages distribute average.Head end 1-3 circle is subjected to transient voltage too high under the transient state, is easy to occur the breakdown between adjacent turns accident.
Have in the winding construction of frequent break-make dot characteristics at brake etc., energising transient voltage distribution situation and roughly the same upper is easy to occur the breakdown between adjacent turns accident at head end 1-3 circle owing to bearing too high transient voltage equally.
Solve the technology of breakdown between adjacent turns in variable-frequency motor, adopt at present the anticorona paint special envelope curve of QP-2/200, namely increase one deck layer of anti-the corona in copper line surface more, pulse is reflected and is disperseed to high frequency voltage.This enamelled wire can not improve for the situation that transient state head end three circles bear high pressure, and head end head three turn insulation intensity are still a little less than the relative thin.If several circles of the head end of same coil are run into just with several circles of end in motor slot, it is poor also can to produce high voltage, still the turn-to-turn accident can occur.
Solve technology multiplex paste paint envelope curve in brake of breakdown between adjacent turns, a small amount of use QP-2/200 anticorona varinish envelope curve is also arranged, but the risk that is easy to occur breakdown between adjacent turns because head end three circle transient voltages are too high still exists.
Summary of the invention
For solving present variable-frequency motor or the technical problem that head end three circle coils are punctured by instantaneous pressure easily in the motor winding of frequent power on/off characteristic demand being arranged, the invention provides a kind of with low cost, simple motor winding that can effectively increase the turn-to-turn insulation ability.
The technical solution used in the present invention is: a kind of motor winding of effective increase turn-to-turn insulation ability, comprise the series arm that the some circle coils that formed by the enamelled wire coiling form, it is characterized in that: the enamelled wire of some circle circle coils of the head end of described each series arm and end is provided with insulating sleeve or coated insulation film.
The head end of described each series arm and terminal cover have the circle coil turn of insulating sleeve or coated insulation film to be respectively 3 circles.
The material of described insulating sleeve or dielectric film is PET.
Beneficial effect of the present invention is: this motor winding can play good enhancing effect to the turn-to-turn insulation performance of the motor that adopts the enamelled wire of anti-corona the and thick film enamelled wire by insulating sleeve or coated insulation film are set at the head end of each series arm and terminal enamelled wire, and also expanding to be applied in the conversion power supply occasion and to have in the winding of frequent power on/off characteristic demand for the common electrical magnet-wire provides a kind of feasible insulation measures.
Description of drawings
Accompanying drawing is the application schematic diagram of this winding in three phase electric machine.
Among the figure, 1, enamelled wire, 2, head end circle coil, 3, the end turns coil, 4, insulating barrier.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
As shown in drawings, three phase electric machine is every to be provided with two series arms mutually, has 6 series arms in the motor winding, and each series arm is comprised of the circle coil of enamelled wire 1 coiling.
As shown in drawings, lay insulating barrier 4 to strengthen the insulation property between the head and end circle coil at the head end circle coil 2 of each series arm and the enamelled wire 1 of end turns coil 3, wherein insulating barrier 4 can adopt the form of insulating sleeve suit or dielectric film coating to arrange.
Because being subjected to the impact of high voltage transient to bear maximum, the second circle and the 3rd circle coil with first circle coil in series arm successively decreases, all the other circle coil voltages distribute average, as shown in the figure, when coil winding, begin to arrange insulating barrier 4 for same series arm head end three circle coils, the 4th circle begins not process, when insulating barrier 4 is set around to terminal three circle the time again.
Insulating barrier 4 shown in the figure can adopt multiple material with insulation property to make, and preferentially adopts in the present embodiment the PET insulating material to make.
Claims (3)
1. motor winding that effectively increases the turn-to-turn insulation ability, comprise the series arm that the some circle coils that formed by the enamelled wire coiling form, it is characterized in that: the enamelled wire of some circle circle coils of the head end of described each series arm and end is provided with insulating sleeve or coated insulation film.
2. the motor winding of a kind of effective increase turn-to-turn insulation ability according to claim 1 is characterized in that: the head end of described each series arm and terminal cover have the circle coil turn of insulating sleeve or coated insulation film to be respectively 3 circles.
3. the motor winding of a kind of effective increase turn-to-turn insulation ability according to claim 1, it is characterized in that: the material of described insulating sleeve or dielectric film is PET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210396457 CN102916513A (en) | 2012-10-18 | 2012-10-18 | Motor winding capable of effectively increasing turn-to-turn insulation capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210396457 CN102916513A (en) | 2012-10-18 | 2012-10-18 | Motor winding capable of effectively increasing turn-to-turn insulation capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102916513A true CN102916513A (en) | 2013-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210396457 Pending CN102916513A (en) | 2012-10-18 | 2012-10-18 | Motor winding capable of effectively increasing turn-to-turn insulation capacity |
Country Status (1)
| Country | Link |
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| CN (1) | CN102916513A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901459A (en) * | 2015-07-06 | 2015-09-09 | 永济新时速电机电器有限责任公司 | Converter-powered loose winding motor |
| CN113328551A (en) * | 2021-05-13 | 2021-08-31 | 新疆金风科技股份有限公司 | Winding assembly, generator and wind generating set |
-
2012
- 2012-10-18 CN CN 201210396457 patent/CN102916513A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901459A (en) * | 2015-07-06 | 2015-09-09 | 永济新时速电机电器有限责任公司 | Converter-powered loose winding motor |
| CN113328551A (en) * | 2021-05-13 | 2021-08-31 | 新疆金风科技股份有限公司 | Winding assembly, generator and wind generating set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |