CN101572455A - Reinforced insulation structure applied to low-voltage variable frequency motor random winding - Google Patents
Reinforced insulation structure applied to low-voltage variable frequency motor random winding Download PDFInfo
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- CN101572455A CN101572455A CNA2009100526923A CN200910052692A CN101572455A CN 101572455 A CN101572455 A CN 101572455A CN A2009100526923 A CNA2009100526923 A CN A2009100526923A CN 200910052692 A CN200910052692 A CN 200910052692A CN 101572455 A CN101572455 A CN 101572455A
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Abstract
The invention relates to a reinforced insulation structure applied to a low-voltage variable frequency motor random winding, wherein same heat-resistant grade insulating sleeves are selected from the head turn and the tail turn of the winding and are sleeved on two leading-out wires of the winding; and after the first coil is embedded and is pushed into a slot, the sleeved head turn insulating sleeve is gradually pushed into a stator slot along the leading-out wires; and the length of the diameter of the insulating sleeves is more than 1/3 of that of an iron core. The reinforced insulation structure has a process that before the winding is embedded, the insulating sleeves are sleeved on the two leading-out wires of the winding, or the sleeves can be pre-sleeved on the leading-out wires during winding; when the first coil is embedded and is pushed into a slot, the sleeved head turn insulating shelve is gradually pushed into the stator slot along the leading-out wires until the length of the straight line part of the head turn insulating sleeve getting into an iron slot is more than 1/3 of that of the iron core, and then other coils of the winding are embedded; and when the tail turn of the last coil of the winding is embedded and is pushed into the slot, the same process is adopted to push the insulating sleeves into the slots of the coils along the leading-out wires.
Description
Technical field
The present invention relates to a kind of reinforced insulation structure, specially refer to the reinforced insulation structure of the diffusing embedding winding initial and end circle of stator of low-pressure high-power adjustable frequency motor.
Background technology
Along with the development of power electronic technology, ac variable speed technology has also obtained constantly improving and improving.Low-pressure high-power frequency conversion threephase asynchronous all is widely used in all trades and professions, but in the process of applying, finds to exist the situation of a large amount of premature damage of its insulation system.This is because the voltage waveform of frequency converter output is different from the sinusoidal waveform of power-frequency voltage, and the voltage of frequency converter output is the pulse square wave with the be exceedingly fast rising edge and the trailing edge that is exceedingly fast, and voltage climbing speed dv/dt is quite high.According to theory of travelling wave, the high-frequency impulse ripple runs into the sudden change of impedance in communication process, and wave reflection and stack will take place.Because the impedance of motor winding much larger than the impedance of cable, therefore will produce the highest peak voltage that is equivalent to 2 times of motor rated voltages at the motor windings lead end.The rising edge time of these peak voltages is short, distributed pole on the motor stator winding is inhomogeneous, born most voltage magnitude on the initial and end circle of stator winding, this minor insulation that also is winding takes place variable-frequency motor usually punctures, especially near the reason that punctures of the turn-to-turn insulation the stator winding initial and end circle.Particularly because the umber of turn of low-pressure high-power motor is considerably less, the impact that the turn-to-turn at the initial and end circle place of winding will bear the peak voltage more much higher than low-power machine winding.
Summary of the invention
The object of the present invention is to provide a kind of reinforced insulation structure that low-voltage variable-frequency motor is used that improves, the low-pressure high-power variable-frequency motor initial and end circle turn-to-turn voltage height of embedding stator winding that looses particularly, the defective of the shock-resistant voltage difference of turn-to-turn insulation, and improve the reinforced insulation structure of the novel low-voltage variable frequency threephase asynchronous of the anti-corona ability of winding simultaneously.
For achieving the above object, technical scheme of the present invention is: to the impedance of motor windings sudden change position, promptly the turn-to-turn insulation reinforcement is carried out at the winding initial and end circle position of bearing high peak voltage.Motor windings behind the reinforced insulation, since increased motor windings initial and end circle place from the lead-out wire to the groove in partly insulation thickness, thereby improved the anti-peak voltage of turn-to-turn of winding initial and end circle and the dielectric strength of shock-resistant voltage greatly, can obviously reduce near the turn-to-turn insulation of stator winding initial and end circle and puncture.Simultaneously because the reinforced insulation structure is born the turn-to-turn insulation thickening at high peak voltage place at winding, make the partial discharge inception voltage (PDIV) of this insulation system under high-frequency impulse improve, can significantly improve the anti-corona ability of variable-frequency motor winding, improve the service life and the operational reliability of variable-frequency motor insulation system.
Beneficial effect of the present invention: adopt technical scheme of the present invention, can reach following effect;
1, after the use winding initial and end circle reinforced insulation structure, can improve the turn-to-turn proof voltage and the shock-resistant voltage insulation intensity of winding head and the tail circle greatly;
2, can significantly improve the anti-corona ability of winding, obviously increase the operational reliability of variable-frequency motor insulation system;
3, the cost that increased of reinforced insulation structure is little, technology is simple, and the insulation stiffening effect is obvious.Therefore, tangible economic benefit is arranged.
Description of drawings
Fig. 1 is a reinforced insulation structure winding schematic diagram of the present invention;
Fig. 2 is the interior sectional view of the groove of reinforced insulation structure of the present invention.
Below in conjunction with drawings and Examples to the technical scheme of the present invention detailed explanation of making comparisons.
Embodiment
With reference to Fig. 1, this is a reinforced insulation structure winding schematic diagram of the present invention.
As shown in the figure, 6 is insulating sleeve, and 7 is the winding lead-out wire, motor stator is when the winding rule, choose the thermal endurance class insulating sleeve 6 identical with the motor heat classification, the casing diameter size of choosing should adapt with the motor lead-out wire, and the length and the electric machine stator iron of sleeve pipe are suitable.
Before the winding rule, insulating sleeve is enclosed within on two lead-out wires of winding and (also can when coiling, sleeve pipe be enclosed within on the lead-out wire in advance), after the first coil rule of winding is gone into groove, the first turn insulation sleeve pipe that will package again pushes in the stator slot along lead-out wire gradually, the length of straight line portion should surpass 1/3 core length in it enters core slots, and then all the other coils of embedding winding; After the tail circle rule of an end coil of winding is gone into groove, adopt above-mentioned identical technology that insulating sleeve is pushed in the groove of coil along lead-out wire, the operation of the rule of other coils of winding is consistent with the wire insertion technology of conventional motor.The rule of remaining winding is also taked this technology subsequently.
With reference to Fig. 2, this is a sectional view in the reinforced insulation structure slot for winding of the present invention.
As shown in the figure, 5 for its length L of stator core, the 1 groove contract of going into for the coil rule, and 2 is slot liner, and 3 is phase insulation, and 4 is reinforced insulation.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the present invention; should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense; so be not as limitation of the invention; as long as in connotation scope of the present invention, to the variation of above-described embodiment, the protection range that distortion all will fall into claim of the present invention.
Claims (3)
1, a kind of reinforced insulation structure that is used for the diffusing embedding winding of low-voltage variable frequency motor, comprise motor windings, stator core, it is characterized in that: the increase insulation thickness of part in motor windings initial and end circle place is from the lead-out wire to the groove, choose the thermal endurance class insulating sleeve identical with the motor heat classification, insulating sleeve is enclosed within on two lead-out wires of winding, after the first coil rule of winding was gone into groove, the first turn insulation sleeve pipe that will package again pushed in the stator slot along lead-out wire gradually; Its reinforced insulation structural manufacturing process is the requisite measure of reinforced insulation.
2, the reinforced insulation structure that is used for the diffusing embedding winding of low-voltage variable frequency motor as claimed in claim 1, it is characterized in that: described insulating sleeve, the casing diameter size should adapt with the motor lead-out wire, and the length and the electric machine stator iron of sleeve pipe are suitable, and length should surpass 1/3 core length.
3, the reinforced insulation structure that is used for the diffusing embedding winding of low-voltage variable frequency motor as claimed in claim 1, it is characterized in that: described reinforced insulation structural manufacturing process is, before the winding rule, insulating sleeve is enclosed within on two lead-out wires of winding, also can when coiling, be enclosed within sleeve pipe on the lead-out wire in advance, after the first coil rule of winding is gone into groove, the first turn insulation sleeve pipe that will package again pushes in the stator slot along lead-out wire gradually, the length of straight line portion should surpass 1/3 core length in it enters core slots, and then all the other coils of embedding winding; After the tail circle rule of an end coil of winding is gone into groove, adopt above-mentioned identical technology that insulating sleeve is pushed in the groove of coil along lead-out wire, the operation of the rule of other coils of winding is consistent with the wire insertion technology of conventional motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100526923A CN101572455B (en) | 2009-06-09 | 2009-06-09 | Reinforced insulation structure applied to low-voltage variable frequency motor random winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100526923A CN101572455B (en) | 2009-06-09 | 2009-06-09 | Reinforced insulation structure applied to low-voltage variable frequency motor random winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101572455A true CN101572455A (en) | 2009-11-04 |
| CN101572455B CN101572455B (en) | 2011-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100526923A Active CN101572455B (en) | 2009-06-09 | 2009-06-09 | Reinforced insulation structure applied to low-voltage variable frequency motor random winding |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710763B (en) * | 2009-12-14 | 2011-09-21 | 陕西航空电气有限责任公司 | Method for puncturing iron core by motor wire-insertion preventing winding |
| CN102947894A (en) * | 2010-06-22 | 2013-02-27 | Abb研究有限公司 | Electrical conductor with surrounding electrical insulation |
| 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 |
| CN106533014A (en) * | 2015-09-10 | 2017-03-22 | 建准电机工业股份有限公司 | Stator coil group |
| CN109617283A (en) * | 2018-12-04 | 2019-04-12 | 哈尔滨电机厂有限责任公司 | A kind of three branch stator winding structures of bridging decompression |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3912957A (en) * | 1973-12-27 | 1975-10-14 | Gen Electric | Dynamoelectric machine stator assembly with multi-barrel connection insulator |
| CN2704960Y (en) * | 2004-06-14 | 2005-06-15 | 付孜隽 | Miniature permanent magnetic DC motor armature |
| JP2007104767A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Insulative plastic tube for connecting lead wire in electric motor |
| CN100525012C (en) * | 2007-06-15 | 2009-08-05 | 江苏安捷机电技术有限公司 | Insulating system with double-strength, zero-air-gap and corona resistance for electric motor of non-gear permanent-magnetic tractor |
-
2009
- 2009-06-09 CN CN2009100526923A patent/CN101572455B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710763B (en) * | 2009-12-14 | 2011-09-21 | 陕西航空电气有限责任公司 | Method for puncturing iron core by motor wire-insertion preventing winding |
| CN102947894A (en) * | 2010-06-22 | 2013-02-27 | Abb研究有限公司 | Electrical conductor with surrounding electrical insulation |
| US9019060B2 (en) | 2010-06-22 | 2015-04-28 | Abb Research Ltd. | Electrical conductor with surrounding electrical insulation |
| 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 |
| CN106533014A (en) * | 2015-09-10 | 2017-03-22 | 建准电机工业股份有限公司 | Stator coil group |
| CN109617283A (en) * | 2018-12-04 | 2019-04-12 | 哈尔滨电机厂有限责任公司 | A kind of three branch stator winding structures of bridging decompression |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101572455B (en) | 2011-06-08 |
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Owner name: SHANGHAI DIANKE ENERGY SAVING TECHNOLOGY CO., LTD. Effective date: 20120726 |
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Effective date of registration: 20120726 Address after: 200063 No. 505, Wuning Road, Shanghai Co-patentee after: Shanghai Dianke Energy Saving Technology Co., Ltd. Patentee after: Shanghai Seari Motor Technology Co., Ltd. Address before: 200063 No. 505, Wuning Road, Shanghai Patentee before: Shanghai Seari Motor Technology Co., Ltd. |