CN104901459B - The scattered winding electric machine that current transformer is powered - Google Patents
The scattered winding electric machine that current transformer is powered Download PDFInfo
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- CN104901459B CN104901459B CN201510389678.8A CN201510389678A CN104901459B CN 104901459 B CN104901459 B CN 104901459B CN 201510389678 A CN201510389678 A CN 201510389678A CN 104901459 B CN104901459 B CN 104901459B
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Abstract
The insulation system of the scattered winding electric machine powered the present invention relates to current transformer, the scattered winding electric machine that specially a kind of current transformer is powered.Solve the problems, such as that scattered winding electric machine turn-to-turn insulation unreasonable structure, intractability that existing current transformer powers are big.The motor includes being provided with thereon the stator and stator winding of stator slot, stator slot wherein where the first and last circle of every branch road of stator winding is defined as special groove, in special groove, corona-resistant film or Kapton are provided between every the first circle and remaining circle of branch road, between the last circle and remaining circle of every branch road.When stator winding is double-deck integral pitch winding, first and last circle is located in same stator slot, and now, corona-resistant film or Kapton are also as layer insulation.The insulation system of the scattered winding electric machine powered the invention provides a kind of reliable current transformer of easy to operate, insulating properties, while farthest improving copper factor.Improve the serviceability of the scattered winding electric machine that current transformer is powered.
Description
Technical field
The present invention relates to the scattered winding electric machine that current transformer is powered, more particularly to this kind insulation system of motor, specially one
Plant the scattered winding electric machine that current transformer is powered.
Background technology
With IGBT（Insulated gate bipolar IGCT）A large amount of utilizations, converter topology make rapid progress, alternating current generator adjust
It is abnormal simple that speed becomes, therefore the utilization of industrial circle alternating current generator is very universal.But there are a large amount of points in current transformer output
Peak voltage, the current transformer peak voltage for switching frequency 2KHz or so is usually 2.5 ~ 4 times of busbar voltage, and switching frequency is got over
Current transformer high this numerical value can be higher, and limiting case can reach 10 times.Insulating barrier bears very high for load motor
Turn-to-turn voltage.Therefore the insulation system of motor needs to carry out preferably to process to adapt to current power supply mode.According to motor
The research of winding, the first and last circle of every branch road assume responsibility for more than the 60% of peak voltage value when motor is impacted by peak voltage.It is existing
Have a scattered winding electric machine that current transformer is powered, the insulation system in groove where its every first and last circle of branch road and other grooves be
's（As shown in Figure 1）, therefore it is motor insulation processing that turn-to-turn insulation reinforcement treatment is carried out to the first and last circle of every branch road of motor
It is crucial.
Shaping winding very easily can put insulating materials with reinforced insulation intensity in turn-to-turn pad, but dissipate winding electric machine due to
Line footpath is small（0.2~2mm）And it is many around radical（Several to tens）, it is difficult effectively to be insulated from technique and economy point,
Simultaneously there is substantial amounts of pinhole aperture in enamel-covered wire in itself, and the resistivity to peak voltage is weaker.What therefore current transformer was powered dissipates
There is very big hidden danger always in winding electric machine insulation system.
In order to improve turn-to-turn insulation intensity, selection thickeies paint film to prior art, strengthens every conductor insulation, can be effective
Improve dielectric strength.But selection thickeies paint film causes motor copper factor high, it is impossible to effectively utilize motor ferromagnetic material, ultimately result in
Motor volume increases.Thickening paint film causes the reduction of conductor heat-sinking capability, also limit the raising of power of motor density.Paint film rule
During have damage risk higher, as exactly be in first and last circle at be fatal.
Prior art also has using every and to strengthen first and last turn insulation by the way of wrapped Kapton on conductor strong
Degree.Adopt in such a way, technology difficulty and cost of labor are very high, in the outer wrapped film of very thin electromagnetic wire, efficiency is very low.Only
Adapt to for and around the few motor of radical, and be more difficult to implement around radical more.
The content of the invention
The present invention solves the scattered winding electric machine turn-to-turn insulation unreasonable structure that existing current transformer powers, intractability is big asks
A kind of topic, there is provided the scattered winding electric machine that improved current transformer of turn-to-turn insulation structure is powered.
The present invention adopts the following technical scheme that realization：The scattered winding electric machine that current transformer is powered, including be provided with thereon calmly
The stator and stator winding of pilot trench, the wherein stator slot where the first and last circle of every branch road of stator winding are defined as special groove,
It is thin Inverter fed motor to be provided with special groove, between every the first circle and remaining circle of branch road, between the last circle and remaining circle of every branch road
Film or Kapton.Used as a kind of special circumstances, when stator winding is double-deck integral pitch winding, first and last circle is located at certain
In pilot trench, now, corona-resistant film or Kapton are also as layer insulation, i.e. corona-resistant film or Kapton
The continuously coiling downwards in the double layered stator groove, pass sequentially through between the first circle on upper strata and remaining circle, interlayer and lower floor its
Between remaining circle and last circle, so, it is convenient to omit layer insulation, make more reasonable structure, rule more convenient operation.
A kind of insulation knot of the scattered winding electric machine powered the invention provides reliable current transformer of easy to operate, insulating properties
Structure, while farthest improving copper factor.The serviceability of the scattered winding electric machine that current transformer is powered is improve, while work
Productivity ratio is higher, fullys meet the requirement of mass production.
Brief description of the drawings
Fig. 1 is the groove interior insulation system schematic diagram of the scattered winding electric machine that existing current transformer is powered；
Fig. 2 is the special groove interior insulation system schematic diagram of the scattered winding electric machine that current transformer of the present invention is powered.
In figure：1- corona-resistant films or Kapton, 2- layer insulations.
Specific embodiment
The scattered winding electric machine that current transformer is powered, including be provided with the stator and stator winding of stator slot thereon, wherein stator around
Stator slot where every first and last circle of branch road of group is defined as special groove, in special groove, every first circle of branch road and remaining circle
Between, between the last circle and remaining circle of every branch road be provided with corona-resistant film or Kapton 1.As a kind of special feelings
Condition, when stator winding is double-deck integral pitch winding, first and last circle is located in same stator slot, and now, corona-resistant film or polyamides are sub-
Amine film 1 is also continuously downward in the double layered stator groove as layer insulation 2, i.e. corona-resistant film or Kapton 1
Coiling, passes sequentially through between the first circle on upper strata and remaining circle, between remaining circle of interlayer and lower floor and last circle.
So that a parallel branch number is 1 three phase electric machine as an example, motor needs specially treated per phase first and last circle, has 6 circles
Specially treated is needed, using motor this 6 grooves as special groove, remaining regular troughs presses conventional motors disposal methods.
In Fig. 1,2, each roundlet represents a circle of winding（Can be several or tens and around enamel-cover round wires）This
What figure was represented is a coil for 3 circles, and motor is Double Layer Winding, therefore 6 circle coils are had in each groove；Shown in Fig. 2 is double
The special groove of layer integral pitch winding, by the layer insulation of regular troughs（Generally insulating paper）It is changed to corona-resistant film or polyimides
Film, shows and is arranged in motor special groove, i.e., corona-resistant film or Kapton 1 are in the double layered stator groove according to Fig. 2
Continuously coiling downwards, passes sequentially through between the first circle on upper strata and remaining circle, between remaining circle of interlayer and lower floor and last circle.Adopt
Turn-to-turn insulation intensity had not only been improve in this way but also practical in process aspect, technology difficulty increases very little.Facts have proved
Such structure operation is convenient, and insulation system reliability, motor copper factor is not almost reduced.
Claims (1)
1. the scattered winding electric machine that a kind of current transformer is powered, including the stator and stator winding of stator slot are provided with thereon, its feature exists
Special groove is defined as in the stator slot where the first and last circle of every branch road of stator winding, in special groove, every first circle of branch road
Corona-resistant film or Kapton are provided between remaining circle, between the last circle and remaining circle of every branch road（1）；When fixed
When sub- winding is double-deck integral pitch winding, first and last circle is located in same stator slot, now, corona-resistant film or Kapton
（1）Also as layer insulation（2）, i.e. corona-resistant film or Kapton（1）It is continuously downward in the double layered stator groove
Coiling, passes sequentially through between the first circle on upper strata and remaining circle, between remaining circle of interlayer and lower floor and last circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389678.8A CN104901459B (en) | 2015-07-06 | 2015-07-06 | The scattered winding electric machine that current transformer is powered |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389678.8A CN104901459B (en) | 2015-07-06 | 2015-07-06 | The scattered winding electric machine that current transformer is powered |
Publications (2)
| Publication Number | Publication Date |
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| CN104901459A CN104901459A (en) | 2015-09-09 |
| CN104901459B true CN104901459B (en) | 2017-07-07 |
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| CN201510389678.8A Active CN104901459B (en) | 2015-07-06 | 2015-07-06 | The scattered winding electric machine that current transformer is powered |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109004783A (en) * | 2018-06-27 | 2018-12-14 | 恒大法拉第未来智能汽车（广东）有限公司 | A kind of rotating electric machine and its stator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202183663U (en) * | 2011-08-08 | 2012-04-04 | 南阳防爆集团股份有限公司 | Insulating structure for variable frequency motor solenoids |
| CN202978497U (en) * | 2012-12-10 | 2013-06-05 | 南阳防爆集团股份有限公司 | 3300V coal special-purpose motor stator coil insulating structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS605747A (en) * | 1983-06-24 | 1985-01-12 | Toshiba Corp | Insulated coil |
| CN101245212B (en) * | 2008-03-12 | 2011-07-20 | 株洲时代新材料科技股份有限公司 | Method for producing electric corona resistant wire coating enamel with in situ polymerization method |
| CN101594017B (en) * | 2008-05-27 | 2011-11-30 | 天津荣亨集团股份有限公司 | Stator winding structure of low-speed oil submersible motor |
| CN101572455B (en) * | 2009-06-09 | 2011-06-08 | 上海电科电机科技有限公司 | Reinforced insulation structure applied to low-voltage variable frequency motor random winding |
| CN102916513A (en) * | 2012-10-18 | 2013-02-06 | 山东华力电机集团股份有限公司 | Motor winding capable of effectively increasing turn-to-turn insulation capacity |
| CN103997148A (en) * | 2014-06-13 | 2014-08-20 | 湘潭电机股份有限公司 | Motor stator coil turn-to-turn insulation structure |
| CN104362786B (en) * | 2014-11-25 | 2017-07-04 | 南阳防爆集团股份有限公司 | 200 grades of low voltage motors dissipate embedding winding insulation structure and its insulating method |
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2015
- 2015-07-06 CN CN201510389678.8A patent/CN104901459B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202183663U (en) * | 2011-08-08 | 2012-04-04 | 南阳防爆集团股份有限公司 | Insulating structure for variable frequency motor solenoids |
| CN202978497U (en) * | 2012-12-10 | 2013-06-05 | 南阳防爆集团股份有限公司 | 3300V coal special-purpose motor stator coil insulating structure |
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| CN104901459A (en) | 2015-09-09 |
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Address after: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Patentee after: CRRC YONGJI ELECTRIC CO., LTD. Address before: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Patentee before: Yongji Xinshisu Motor Electrical Appliance Co., Ltd. |