CN100525012C - Insulating system with double-strength, zero-air-gap and corona resistance for electric motor of non-gear permanent-magnetic tractor - Google Patents
Insulating system with double-strength, zero-air-gap and corona resistance for electric motor of non-gear permanent-magnetic tractor Download PDFInfo
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- CN100525012C CN100525012C CNB2007100244148A CN200710024414A CN100525012C CN 100525012 C CN100525012 C CN 100525012C CN B2007100244148 A CNB2007100244148 A CN B2007100244148A CN 200710024414 A CN200710024414 A CN 200710024414A CN 100525012 C CN100525012 C CN 100525012C
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Abstract
The invention is used in AC-powered variable-frequency rare earth permanent magnet synchronous motor with low speed and high torque and frequently started and arrested. It comprises: main insulation, phase insulation, coil end insulation, insulating bush insulation, electromagnetic line insulation, leading-out line insulation, slot wedge, outgoing line board, and impregnating varnish. The main insulation comprises: slot insulation, overhang packing insulation, in-slot inter-layer insulation; the overhang packing, in-slot inter-layer insulation and phase insulation is made out of Mylar Polyaramide fiber paper; the electromagnetic line of stator coil is made out of anti-corona enameled copper wire; dip treating is made for the stator iron core with winding; impregnating varnish uses solvent-free immersion paint made out of polyester resin and unsaturated resin; a vacuum impregnation is used.
Description
Technical field
What gearless permanent-magnet traction machine motor dual intensity of the present invention, zero-air-gap, corona-resistant insulation system related to is a kind of gearless, the slow-speed of revolution, the synchronous hoisting motor dual intensity of high torque (HT) rare earth permanent magnet, zero-air-gap, corona-resistant insulation system and insulating method thereof, is applicable to AC frequency conversion power supply and the frequent rare-earth permanent-magnet synchronous motor that plays the slow-speed of revolution high torque (HT) of braking.
Background technology:
At present, gearless permanent-magnet traction machine motor insulation system is only noticed electric strength, has ignored mechanical strength, and the motor winding is full of air gap, has caused high-frequency impulse discharge, electrion, and motor is often burnt out.Frequent rising braked, the repeat pressure that electro-magnetic exciting force and vibration cause, cause the electrical machine insulation accelerated ageing, very big at operating frequency range built-in motor noise, having influenced the elevator comfort level. the control of conversion power supply is long to the tie cable length of motor terminals in addition, be easy to generate partial discharge, around having lacked motor useful life.Problems cause elevator traction motor reliability decrease.
Summary of the invention
The objective of the invention is provides a kind of gearless permanent-magnet traction machine dual intensity, zero-air-gap, corona-resistant insulation system at above-mentioned weak point, for this significant problem of elevator traction motor reliability decrease, study from the mechanism of damaging, seek the damage mechanism of the various materials of insulation, formulate novel insulation system and insulating process then, address the above problem to practice from mechanism, thereby realized that the gearless permanent-magnet traction machine reaches the purpose of electric strength height, mechanical strength height, zero-air-gap, anti-corona.
Gearless permanent-magnet hoisting motor dual intensity, zero-air-gap, the corona-resistant insulation system takes following scheme to realize:
Gearless permanent-magnet hoisting motor dual intensity, zero-air-gap, the corona-resistant insulation system comprises electromagnetic wire, main insulation, insulation, end winding insulation, insulating sleeve insulation, electromagnetic wire, lead-out wire insulation, slot wedge, outlet board, impregnating varnish mutually.
Main insulation comprises interlayer insulation in slot liner, overhang packing insulation, the groove, slot liner adopts the polyester film aromatic polyamide paper, for two layers of liner of composite flexible material (extrusion coating paper) NMN 0.25mm at the motor stator core slot part, solve the insulation against ground of stator winding.
The polyester film aromatic polyamide paper is adopted in the overhang packing insulation, be composite flexible material (extrusion coating paper) NMN 0.3m one deck, liner has realized that in the end of electric machine iron core groove mechanical lining is strong, prevent coil under the effect of motor, coil is cut bad by the motor stator core notch.
The polyester film aromatic polyamide paper is adopted in the interlayer insulation in the groove, for composite flexible material (extrusion coating paper) NMN 0.35mm one deck liner at motor stator core at the middle and upper levels between winding and the lower floor's winding, because upper and lower layer winding adheres to different phases separately, produces potential difference, also needs insulation.
The polyester film aromatic polyamide paper is adopted in insulation mutually, for one to two layer of liner of composite flexible material (411 maos of paper) N411-M-N411 0.25mm at stator winding between phase and phase, when electrical machine insulation floods, hair paper absorbs the electrical machine insulation lacquer to enter, insulating varnish can strengthen stator winding mechanical strength between phase and phase after solidifying.
End winding insulation, winding roll off the production line finish after, the stator winding coil that each stator core slot is stretched out carries out colligation, adopts insulating adhesive tape and glass fiber winding tapes to carry out colligation.
The insulating sleeve insulation, adopt the silicon rubber glass fiber insulating sleeve to be sleeved on each phase lead-out wire at each lead-out wire of stator winding coil, because silicon rubber has good electrical strength and performance, but mechanical strength is relatively poor, compound layer of glass is with mechanical reinforcement on silicon rubber.
The electromagnetic wire insulation: the electromagnetic wire that coil of stator of motor uses adopts the enamel insulated round copper wire of anti-the corona, and wire enamel requires to have 35% match gram group (" THECK " group), and electromagnetic wire adopts complex polyester imines acid imide two-layer compound line, has anticorona power.
Lead-out wire adopts rubber-covered motor lead-out wire, has the function that anti-dipping does not chap.
Slot wedge is contained in the stator core slot upper notch, with 15mm3240 ring chlorophenol aldehyde glass cloth laminated board, after the processing, needs preimpregnation insulating varnish once.
Outlet board, the outlet board that is contained in the electric machine stand outlet box adopts polyester fiber to strengthen thermosetting polyester resin moulded plastic plate.
Impregnating varnish: have the stator core impregnation process of winding, it is the solvent-free immersion paint of lacquer base that impregnating varnish adopts with epoxy resin and unsaturated polyester resin.Its curing rate is fast, and volatile quantity and adopts vacuum impregnation less than 5% in the solidification process, can realize " zero-air-gap " insulation basically.
Gearless permanent-magnet traction machine motor dual intensity, zero-air-gap, corona-resistant insulation system characteristics:
1, the stator core impregnation process that has winding of the present invention owing to adopt vacuum paint dipping technology, can be guaranteed to form " no air-gap insulation ".No air-gap-insulated obtains to seem very important, is beneficial to heat radiation (heat loss through conduction) on the one hand, has also stopped the air gap on the other hand and has produced ionization, and high voltage (sometimes up to 3Kv) punctures insulation.Also greatly improve the mechanical strength of insulation system simultaneously, resisted exciting force and resonance that variable-frequency motor produces, reduced the noise in the operating frequency range.
2, very strong electric strength is arranged: openpore circle examination 3600V
Withstand voltage over the ground 2760V/ minute
Can resist high-frequency impulse 1.6Kv
3, very strong mechanical strength is arranged, can resist the electro-magnetic exciting force that high-frequency impulse forms.
4, can under moist (95% humidity has condensation), salt fog, mould condition, work
5, the ac variable frequency speed regulation rare earth permanent magnet synchronous hoisting motor of power of the present invention below 300KW:
A. thermal endurance class: H level and 200 ℃ of levels
To wire enamel, THECK group〉35% special requirement.
B. lacquer is touched continuity (pinhole test)
Requirement is: 3.5KV35m " O " pin hole.
6, ability corona.Low voltage motor has been proposed the specific (special) requirements of the anti-corona of high-voltage motor requirement:
Initial corona voltage 660V
Anti-pulse voltage performance its life-span under following test condition is 〉=60 hours
Test condition:
Pulse frequency 20KhHz
Pulse rise time 50ns
Pulse spacing 0.08-0.25s
The impulse waveform square wave
Pulse polarity is bipolar
Voltage 3000V
90 ℃ of temperature
Anti-pulse index: life of product/unidimensional and isostructural MW-35 〉=60
Description of drawings
The invention will be further described below with reference to accompanying drawing.
Fig. 1 is gearless permanent-magnet traction machine motor dual intensity, zero-air-gap, corona-resistant insulation system partial structurtes schematic diagram.
Embodiment
With reference to accompanying drawing 1, gearless permanent-magnet hoisting motor dual intensity, zero-air-gap, the corona-resistant insulation system comprises main insulation, insulation, end winding insulation, insulating sleeve insulation, electromagnetic wire insulation, lead-out wire insulation, slot wedge, outlet board, impregnating varnish mutually.
Main insulation comprises interlayer insulation 5 in slot liner 1, overhang packing insulation 2, the groove, slot liner 1 adopts the polyester film aromatic polyamide paper, for two layers of liner of composite flexible material paper thickness 0.25mm (NMN0.25mm) at motor stator core 7 slot parts, solve the insulation against ground of stator winding.
It is composite flexible material paper thickness 0.3mm (NMN 0.3mm) one deck that the polyester film aromatic polyamide paper is adopted in overhang packing insulation 2, liner is in the end of electric machine iron core groove, realize that the machinery lining is strong, prevent coil under the effect of motor, coil is cut bad by the motor stator core notch.
The polyester film aromatic polyamide paper is adopted in interlayer insulation 5 in the groove, for composite flexible material paper thickness 0.35mm (NMN0.35mm) one deck liner at motor stator core at the middle and upper levels between winding and the lower floor's winding, because upper and lower layer winding adheres to different phases separately, produces potential difference, also needs insulation.
6 employing polyester film aromatic polyamide papers mutually insulate, for one to two layer of liner of composite flexible material hair paper thickness 0.25mm (411 maos of paper) N411-M-N411 0.25mm at stator winding between phase and phase, when electrical machine insulation floods, hair paper absorbs the electrical machine insulation lacquer to enter, to strengthen stator winding mechanical strength between phase and phase.
End winding insulation 4, winding roll off the production line finish after, the stator winding coil that each stator core slot is stretched out carries out colligation, adopts insulating adhesive tape and glass fiber winding tapes 10, colligation.
Insulating sleeve insulation 8, adopt the silicon rubber glass fiber insulating sleeve to be sleeved on each phase lead-out wire at each lead-out wire of stator winding coil, because silicon rubber has good electrical strength and performance, but mechanical strength is relatively poor, at rubber combined last layer glass fibre with mechanical reinforcement.
Electromagnetic wire insulation 3: the electromagnetic wire that coil of stator of motor uses adopts the enamel covered wire of anti-the corona, and wire enamel requires to have 35% match gram group (" THECK " group), and electromagnetic wire adopts complex polyester imines acid imide two-layer compound line, has anticorona power.
Lead-out wire 11 adopts rubber-covered motor lead-out wire, has the function that anti-dipping does not chap.
Slot wedge 9 is contained in the stator core slot upper notch, uses the 15mm3240 epoxy phenol aldehyde glass cloth laminated board, after the processing, needs preimpregnation insulating varnish once.
Outlet board, the outlet board in the dress electric machine stand outlet box adopts polyester fiber to strengthen thermosetting polyester resin moulded plastic plate.
Impregnating varnish: stator core 7 impregnation process that have winding, it is the solvent-free immersion paint of lacquer base that impregnating varnish adopts with epoxy resin and insatiable hunger mylar, its curing rate is fast, volatile quantity is less than 5% in the solidification process, adopt vacuum impregnation technique, basically can form zero-air-gap insulation, have good compatibility through test and engineering practice application note impregnating varnish and wire enamel.
The stator core vacuum impregnation technique that has winding: the motor stator core that will have winding is placed on the drying room oven dry, hang in vacuum impregnation in the vacuum impregnation jar, at this moment impregnating varnish fully immerses motor windings, electric machine iron core groove inside, has to hang toward oven-baked behind the stator core impregnating varnish of winding to solidify.
Claims (6)
1, a kind of gearless permanent-magnet hoisting motor dual intensity, zero-air-gap, corona-resistant insulation system is characterized in that system comprises electromagnetic wire, main insulation, insulation, end winding insulation, insulating sleeve insulation, electromagnetic wire insulation, lead-out wire insulation, slot wedge, outlet board, impregnating varnish mutually;
Main insulation comprises interlayer insulation in slot liner, overhang packing insulation, the groove, and slot liner adopts two layers of liner of polyester film aromatic polyamide paper at the motor stator core slot part, solves the insulation against ground of stator winding;
Polyester film aromatic polyamide paper one deck is adopted in the overhang packing insulation, and liner is in the end of electric machine iron core groove;
The interlayer insulation adopts polyester film aromatic polyamide paper one deck liner at motor stator core at the middle and upper levels between winding and the lower floor's winding in the groove;
Insulation is adopted one to two layer of liner of polyester film aromatic polyamide paper hair paper at stator winding between phase and phase mutually, and when electrical machine insulation flooded, hair paper absorbed the electrical machine insulation lacquer to enter, and after the baked and cured, can strengthen stator winding mechanical strength between phase and phase;
End winding insulation winding roll off the production line finish after, the stator winding coil that each stator core slot is stretched out carries out colligation, adopts insulating adhesive tape and glass fiber winding tapes to carry out colligation;
The insulating sleeve insulation adopts the silicon rubber glass fiber insulating sleeve to be sleeved on each phase lead-out wire at each lead-out wire of stator winding coil, and compound layer of glass is with mechanical reinforcement on silicon rubber;
The electromagnetic wire insulation, the electromagnetic wire that coil of stator of motor uses adopts the enamel insulated round copper wire of anti-the corona; Lead-out wire adopts silicon rubber insulation motor lead-out wire;
Slot wedge is contained in the stator core slot upper notch, adopts ring chlorophenol aldehyde glass cloth laminated board, after the processing, needs preimpregnation insulating varnish once;
Outlet board, the outlet board in the dress motor cabinet outlet box adopt polyester fiber to strengthen the poly-resin-molded plastic plate of thermosetting;
Impregnating varnish has the stator core impregnation process of winding, and it is the solvent-free immersion paint of lacquer base that impregnating varnish adopts with cyclochloride resin and insatiable hunger resin, and adopts vacuum impregnation.
2, gearless permanent-magnet hoisting motor dual intensity according to claim 1, zero-air-gap, corona-resistant insulation system is characterized in that electromagnetic wire adopts complex polyester imines acid imide two-layer compound line.
3, gearless permanent-magnet hoisting motor dual intensity according to claim 1, zero-air-gap, corona-resistant insulation system is characterized in that it is composite flexible material paper thickness 0.25mm that slot liner adopts the polyester film aromatic polyamide paper.
4, gearless permanent-magnet hoisting motor dual intensity according to claim 1, zero-air-gap, corona-resistant insulation system is characterized in that it is composite flexible material paper thickness 0.3mm that the polyester film aromatic polyamide paper is adopted in the overhang packing insulation.
5, gearless permanent-magnet hoisting motor dual intensity according to claim 1, zero-air-gap, corona-resistant insulation system is characterized in that the polyester film aromatic polyamide paper is adopted in the interlayer insulation in the groove, are composite flexible material paper thickness 0.35mm.
6, gearless permanent-magnet hoisting motor dual intensity according to claim 1, zero-air-gap, corona-resistant insulation system is characterized in that insulating mutually and adopt the polyester film aromatic polyamide paper, are composite flexible material hair paper thickness 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100244148A CN100525012C (en) | 2007-06-15 | 2007-06-15 | Insulating system with double-strength, zero-air-gap and corona resistance for electric motor of non-gear permanent-magnetic tractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100244148A CN100525012C (en) | 2007-06-15 | 2007-06-15 | Insulating system with double-strength, zero-air-gap and corona resistance for electric motor of non-gear permanent-magnetic tractor |
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| CN101075758A CN101075758A (en) | 2007-11-21 |
| CN100525012C true CN100525012C (en) | 2009-08-05 |
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| CNB2007100244148A Expired - Fee Related CN100525012C (en) | 2007-06-15 | 2007-06-15 | Insulating system with double-strength, zero-air-gap and corona resistance for electric motor of non-gear permanent-magnetic tractor |
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| CN102158020B (en) * | 2011-04-18 | 2012-12-19 | 重庆德马变频电机研发制造有限公司 | Binding technology for mush winding motor end part |
| CN103095018A (en) * | 2011-10-27 | 2013-05-08 | 江苏大中电机股份有限公司 | Insulating device of low-speed variable frequency motor for steel rolling |
| CN103337924A (en) * | 2013-06-27 | 2013-10-02 | 苏州巨峰电气绝缘系统股份有限公司 | Ammonia refrigerant resistant motor electrical insulation system |
| CN103944290A (en) * | 2014-04-24 | 2014-07-23 | 郭前勇 | Novel motor stator iron core and producing method thereof |
| WO2016042628A1 (en) * | 2014-09-17 | 2016-03-24 | 三菱電機株式会社 | Power conversion device and compressor driving device |
| CN105048681B (en) * | 2015-06-30 | 2018-02-27 | 蓬莱市特种绝缘材料厂 | A kind of nuclear power generating sets motor electrical insulation system |
| CN106411015B (en) * | 2016-12-07 | 2019-01-25 | 大连威克特工贸有限公司 | Motor insulation structure under deep cooling operating condition |
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| CN107171507A (en) * | 2017-05-25 | 2017-09-15 | 合肥皖化电泵有限公司 | A kind of BCP pumps winding overhang technique for fixing |
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| EP3503354A1 (en) * | 2017-12-20 | 2019-06-26 | Siemens Aktiengesellschaft | Isolation of sub-conductors of a dynamoelectric machine |
| CN108696029B (en) * | 2018-07-25 | 2024-04-19 | 安徽皖南电机股份有限公司 | Fixing structure and binding process for stator winding end part of low-speed high-torque permanent magnet direct-drive motor |
| CN111799968B (en) * | 2020-08-11 | 2022-12-30 | 哈尔滨电气动力装备有限公司 | Rotor winding inserting tool |
| CN113809861A (en) * | 2021-08-13 | 2021-12-17 | 松下压缩机(大连)有限公司 | Insulation structure of F-level insulated motor suitable for compressor and insulation improving method thereof |
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