CN104901459A - Converter-powered loose winding motor - Google Patents
Converter-powered loose winding motor Download PDFInfo
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- CN104901459A CN104901459A CN201510389678.8A CN201510389678A CN104901459A CN 104901459 A CN104901459 A CN 104901459A CN 201510389678 A CN201510389678 A CN 201510389678A CN 104901459 A CN104901459 A CN 104901459A
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Abstract
The invention relates to an insulating structure of a converter-powered loose winding motor, in particular to the converter-powered loose winding motor. The invention solves the problem that the insulating structure among the turns of a conventional converter-powered loose winding motor is unreasonable and is highly difficult to process. The motor comprises a stator with a stator slot and a stator winding, wherein the stator slot in which the first turn and final turn of each branch of the stator winding are located is defined as a special slot, and in the special slot, a corona-resistant film or polyimide film is arranged between the first turn and other turns of each branch and between the final turn and other turns of each branch. When the stator winding is a double-layered integral pitch winding, the first turn and the final turn are located in the same stator slot, and at the moment, the corona-resistant film or polyimide film also serves as an interlayer insulation. The insulating structure of the converter-powered loose winding motor provided by the invention is convenient to operate and has reliable insulating property, and moreover, the slot space factor is increased to the max. The operating reliability of the converter-powered loose winding motor is enhanced.
Description
Technical field
The present invention relates to the loose winding electric machine that current transformer is powered, particularly the insulation system of this kind of motor, be specially the loose winding electric machine that a kind of current transformer is powered.
Background technology
Along with IGBT(insulated gate bipolar thyristor) a large amount of utilizations, converter topology makes rapid progress, and it is abnormal simple that speed regualtion of AC motor becomes, and therefore the utilization of industrial circle alternating current machine is very general.But current transformer exports exists a large amount of peak voltage, and the current transformer peak voltage for switching frequency about 2KHz is generally 2.5 ~ 4 times of busbar voltage, and this numerical value of current transformer that switching frequency is higher can be higher, and limiting case can reach 10 times.Very high turn-to-turn voltage is born concerning insulating barrier load motor.Therefore the insulation system of motor needs to process better to adapt to current supply power mode.According to the research to motor winding, motor is subject to the first and last circle of every bar branch road when peak voltage impacts and assume responsibility for more than 60% of peak voltage value.The loose winding electric machine that existing current transformer is powered, insulation system in the first and last circle place groove of its every bar branch road is the same (as shown in Figure 1) with other groove, therefore carries out turn-to-turn insulation to the first and last circle of the every bar branch road of motor and strengthens the key that process is electrical machine insulation process.
Shaping winding can put insulating material with reinforced insulation intensity at turn-to-turn pad very easily, but loose winding electric machine is due to wire diameter little (0.2 ~ 2mm) and around radical many (several to tens), be difficult to effectively insulate from technique and economy point, there is a large amount of pinhole aperture in enamelled wire itself simultaneously, more weak to the resistivity of peak voltage.There is very large hidden danger in the loose winding electric machine insulation system that therefore current transformer is powered always.
Prior art, in order to improve turn-to-turn insulation intensity, is selected to thicken paint film, every root conductor insulation is strengthened, effectively can improve dielectric strength.But selecting to thicken paint film causes motor copper factor high, can not effectively utilize motor ferromagnetic material, finally cause motor volume to increase.Thickening paint film causes conductor heat-sinking capability to reduce, and also limit the raising of power of motor density.Having higher damage risk in paint film rule process, is fatal as being exactly in first and last circle place.
Prior art also has the every root of employing and the mode of wrapped polyimide film strengthens first and last turn insulation intensity on conductor.Adopt in such a way, technology difficulty and cost of labor are very high, and at the outer wrapped film of very thin electromagnetic wire, efficiency is very low.Only adapt to be used for and around the few motor of radical, and around the more much more difficult enforcement of radical.
Summary of the invention
The present invention solves the loose winding electric machine turn-to-turn insulation unreasonable structure that existing current transformer is powered, the problem that intractability is large, provides the loose winding electric machine that a kind of current transformer of turn-to-turn insulation architecture advances is powered.
The present invention adopts following technical scheme to realize: the loose winding electric machine that current transformer is powered, comprise the stator and stator winding that it have stator slot, wherein the stator slot at the first and last circle place of the every bar branch road of stator winding is defined as special groove, in special groove, between the first circle of every bar branch road and all the other circles, between the last circle of every bar branch road and all the other circles, be provided with corona-resistant film or polyimide film.As a kind of special circumstances, when stator winding is double-deck whole distance winding, first and last circle is positioned at same stator slot, and now, corona-resistant film or polyimide film are also as layer insulation, namely corona-resistant film or polyimide film coil downwards continuously in this double layered stator groove, successively by between the first circle on upper strata and all the other circles, between all the other circles of interlayer and lower floor and last circle, like this, can layer insulation be omitted, make more reasonable structure, rule more convenient operation.
The invention provides the insulation system of the loose winding electric machine that a kind of easy to operate, reliable current transformer of insulation property is powered, farthest improve copper factor simultaneously.Improve the serviceability of the loose winding electric machine that current transformer is powered, labor productivity is higher simultaneously, fullys meet the requirement of mass production.
Accompanying drawing explanation
Fig. 1 be the loose winding electric machine that existing current transformer is powered groove in insulation system schematic diagram;
Fig. 2 be the loose winding electric machine that current transformer of the present invention is powered special groove in insulation system schematic diagram.
In figure: 1-corona-resistant film or polyimide film, 2-layer insulation.
Embodiment
The loose winding electric machine that current transformer is powered, comprise the stator and stator winding that it have stator slot, wherein the stator slot at the first and last circle place of the every bar branch road of stator winding is defined as special groove, in special groove, between the first circle of every bar branch road and all the other circles, between the last circle of every bar branch road and all the other circles, be provided with corona-resistant film or polyimide film 1.As a kind of special circumstances, when stator winding is double-deck whole distance winding, first and last circle is positioned at same stator slot, now, corona-resistant film or polyimide film 1 are also as layer insulation 2, namely corona-resistant film or polyimide film 1 coil downwards continuously in this double layered stator groove, successively by between the first circle on upper strata and all the other circles, between all the other circles of interlayer and lower floor and last circle.
Be the three phase electric machine of 1 for a parallel branch number, motor every phase first and last circle needs special processing, and having 6 circles needs special processing, and using these 6 grooves of motor as special groove, all the other regular troughs are by conventional motors disposal methods.
In Fig. 1,2, the coil of what each roundlet represented that a circle (can be several or tens and around enamel-cover circle line) this figure of winding represents is 3 circles, motor is two layer winding, therefore has 6 circle coils in each groove; Shown in Fig. 2 is the double-deck whole special groove apart from winding, the layer insulation (being generally insulating paper) of regular troughs is changed to corona-resistant film or polyimide film, be shown in motor special groove according to Fig. 2 and arrange, namely corona-resistant film or polyimide film 1 coil downwards continuously in this double layered stator groove, successively by between the first circle on upper strata and all the other circles, between all the other circles of interlayer and lower floor and last circle.Adopt and not only improve turn-to-turn insulation intensity but also practical at process aspect in this way, technology difficulty increase is very little.Facts have proved that such structure operation is convenient, insulation system is reliable, and motor copper factor does not almost reduce.
Claims (2)
1. a current transformer loose winding electric machine of powering, comprise the stator and stator winding that it have stator slot, it is characterized in that the stator slot at the first and last circle place of the every bar branch road of stator winding is defined as special groove, in special groove, between the first circle of every bar branch road and all the other circles, between the last circle of every bar branch road and all the other circles, be provided with corona-resistant film or polyimide film (1).
2. the current transformer according to claim 1 loose winding electric machine of powering, it is characterized in that when stator winding is for double-deck whole distance winding, first and last circle is positioned at same stator slot, now, corona-resistant film or polyimide film (1) are also as layer insulation (2), namely corona-resistant film or polyimide film (1) coil downwards continuously in this double layered stator groove, successively by between the first circle on upper strata and all the other circles, between all the other circles 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 true CN104901459A (en) | 2015-09-09 |
| CN104901459B CN104901459B (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JPS605747A (en) * | 1983-06-24 | 1985-01-12 | Toshiba Corp | Insulated coil |
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| CN101572455A (en) * | 2009-06-09 | 2009-11-04 | 上海电科电机科技有限公司 | Reinforced insulation structure applied to low-voltage variable frequency motor random winding |
| CN101594017A (en) * | 2008-05-27 | 2009-12-02 | 天津荣亨集团股份有限公司 | A kind of stator winding structure of low-speed oil submersible motor |
| 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 |
| 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 |
| 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 |
| 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 |
| CN104362786A (en) * | 2014-11-25 | 2015-02-18 | 南阳防爆集团股份有限公司 | Insulation structure and method for 200-grade low-voltage motor loosely-embedded winding |
-
2015
- 2015-07-06 CN CN201510389678.8A patent/CN104901459B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS605747A (en) * | 1983-06-24 | 1985-01-12 | Toshiba Corp | Insulated coil |
| CN101245212A (en) * | 2008-03-12 | 2008-08-20 | 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 |
| CN101594017A (en) * | 2008-05-27 | 2009-12-02 | 天津荣亨集团股份有限公司 | A kind of stator winding structure of low-speed oil submersible motor |
| CN101572455A (en) * | 2009-06-09 | 2009-11-04 | 上海电科电机科技有限公司 | Reinforced insulation structure applied to low-voltage variable frequency motor random winding |
| 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 |
| 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 |
| 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 |
| 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 |
| CN104362786A (en) * | 2014-11-25 | 2015-02-18 | 南阳防爆集团股份有限公司 | Insulation structure and method for 200-grade low-voltage motor loosely-embedded winding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN104901459B (en) | 2017-07-07 |
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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. |
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