CN101860096A - Stator core with winding for medium-sized low-voltage variable-frequency motor - Google Patents
Stator core with winding for medium-sized low-voltage variable-frequency motor Download PDFInfo
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- CN101860096A CN101860096A CN201010180041A CN201010180041A CN101860096A CN 101860096 A CN101860096 A CN 101860096A CN 201010180041 A CN201010180041 A CN 201010180041A CN 201010180041 A CN201010180041 A CN 201010180041A CN 101860096 A CN101860096 A CN 101860096A
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Abstract
The invention relates to a stator core with a winding for a medium-sized low-voltage variable-frequency motor, which comprises semi-formed windings, semi-open slot stator punched plates, a bottom pad, a slot insulation layer, a middle pad, a regulation pad, a slot wedge and a mounting slot, wherein the semi-formed windings are arranged at the two ends of the mounting slot; the slot insulation layer is arranged in the mounting slot; the bottom pad is placed on the bottom layer of the inner cavity of the slot insulation layer; a lower-layer stator coil formed by the semi-open slot stator punched plates is placed on the bottom pad; the middle pad is placed on the lower-layer stator coil; an upper-layer stator coil formed by the semi-open slot punched plates is placed on the middle pad; the regulation pad is placed on the upper-layer stator coil; the slot wedge is placed on the regulation pad; and the upper-layer and lower-layer coils are connected with the circuit of the semi-formed windings. The stator core improves the power factor and efficiency of the motor, reduces the capacity of the transducer, has high inter-turn insulation performance and improves the dv/dt value of the motor easily, thereby improving the reliability of the medium-sized variable-frequency motor.
Description
Technical field
What the present invention relates to a kind of medium-sized low-pressure high-power variable-frequency motor has a winding stator core, specifically for the low-pressure high-power variable-frequency motor of height of center 315～710mm the winding stator core is arranged.
Background technology
Along with the application of the high speed development of domestic power industry and frequency control drive system efficiently more and more widely, exigence exploitation low-pressure high-power frequency control threephase asynchronous more.General variable-frequency motor adopts the transistor inverter power supply, and transistor inverter adopts high-frequency pulse, and the pulse lifting time is very short, how to guarantee winding insulation under the crest value of impulse voltage effect do not puncture become the variable-frequency motor reliability key point.In recent years, domestic high-power frequency conversion motor adopted mostly loose roll off the production line repeatedly around or winding with one heart, because power of motor is big, voltage is low, electric current is very big, turn-to-turn operating voltage height, and the enamel insulated round copper wire under loosing, the defective that pin hole that cause exists itself and manufacturing process cause is (as coiling, the damage of paint film in the manufacture process such as roll off the production line, the quality of dipping lacquer) and loose that the first circle of the coil in groove and last circle are collided easily down, shorted-turn fault often appears after operation a period of time, reduce the reliability of medium-sized low-voltage variable-frequency motor, shortened the life-span of medium-sized low-voltage variable-frequency motor.If then the power factor of motor is not high, iron loss is big, efficient is low, has increased the capacity of frequency converter to adopt open slot, moulding winding.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of effective activity coefficient height, arrangements of conductors of groove neat, the first and last circle is difficult for colliding, levels coil and winding overhang also have certain clearance, have fully improved the proof voltage pulse ability of variable-frequency motor.Adopted the semi-open slot stator punching, mainly improved motor power factor, efficient also increases, and reduces the capacity of frequency converter.
According to technical scheme provided by the invention, described medium-sized low-voltage variable-frequency motor has the winding stator core, comprise half-formed winding, the semi-open slot stator punching, heelpiece, the cell body insulating barrier, middle pad, adjusting pad, slot wedge and installation cell body, half-formed winding is installed in the both ends that cell body is installed, install and be provided with the cell body insulating barrier that coincide with its vallecular cavity shape in the cell body, place heelpiece at cell body insulating barrier inner chamber bottom, on heelpiece, place the lower floor's stator coil that constitutes by the semi-open slot stator punching, pad on lower floor's stator coil, placing, on middle pad, place the upper strata stator coil that constitutes by the semi-open slot stator punching, on the stator coil of upper strata, place adjusting pad, on adjusting pad, place slot wedge, the upper strata stator coil, lower floor's stator coil is connected with half-formed winding circuit.
The present invention has improved power factor, the efficient of motor, reduced the capacity of frequency converter, the turn-to-turn insulation performance is good, easily improve the dv/dt value of motor, guaranteed that winding insulation is difficult for puncturing under the crest value of impulse voltage effect, thereby improved the reliability of medium-sized variable-frequency motor.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A cutaway view of Fig. 1.
Fig. 3 is the half-formed winding front view among the present invention.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the right view of Fig. 3.
Fig. 6 is the B-B cutaway view of Fig. 4.
Fig. 7 is the C-C cutaway view of Fig. 4.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in the figure: the present invention mainly is made of half-formed winding 1, semi-open slot stator punching 2, heelpiece 3, cell body insulating barrier 4, middle pad 5, adjusting pad 6, slot wedge 7 and installation cell body 8 etc.
This medium-sized low-voltage variable-frequency motor has the winding stator core, comprise half-formed winding 1, semi-open slot stator punching 2, heelpiece 3, cell body insulating barrier 4, middle pad 5, adjusting pad 6, slot wedge 7 and installation cell body 8, half-formed winding 1 is installed in the both ends that cell body 8 is installed, cell body 8 top end openings are installed, install and be provided with the cell body insulating barrier 4 that coincide with its vallecular cavity shape in the cell body 8, place heelpiece 3 at cell body insulating barrier 4 inner chamber bottoms, on heelpiece 3, place the lower floor's stator coil that constitutes by semi-open slot stator punching 2, fill up 5 on lower floor's stator coil, placing, on middle pad 5, place the upper strata stator coil that constitutes by semi-open slot stator punching 2, on the stator coil of upper strata, place adjusting pad 6, on adjusting pad 6, place slot wedge 7, upper strata stator coil, lower floor's stator coil is connected with half-formed winding 1 circuit.
During assembly unit, lay in the installation cell body 8 of half opening behind the cell body insulating barrier 4 half-formed winding 1 is down packed into for per half half, form lower floor's stator coil and upper strata stator coil, pad 5 in being encased inside between lower floor's stator coil and the upper strata stator coil, and below half-formed winding 1, be encased inside heelpiece 3, the top is encased inside an amount of adjusting pad 6, and the notch position embedded groove wedge 7 that cell body 8 is installed is fixing.
Shown in the accompanying drawing 3: half-formed winding 1 front view is the geomery after pull-shaped, form by linear portions and end, wherein L1 is corresponding unshakable in one's determination long, d stretches out length unshakable in one's determination, fd stretches out tip lengths size unshakable in one's determination, R1 is limit, a coil upper strata radius, and R2 is a coil lower floor limit radius, and R3 is a pulling shaft place radius.
The vertical view of Fig. 4 then is two straight lines and four ends of half-formed winding, and its β is the oblique angle of straight line and end;
The right view of Fig. 5 is the end view after half-formed winding embeds the stator punching flute profile, its Di/2 is the internal diameter of stator punching, R11, R12 place are the internal diameter of certain radian, B 1E is that coil is lowered to the air line distance from a groove to another groove behind the stator punching, LL1, LL2 are the coil level height, and the α angle is the angle that the coil both sides are striden on stator circumference;
The B-B cutaway view of Fig. 6 is the straight line portion cutaway view, is made up of two halves, and each half can be according to different occasions bread low resin mica tape 12 and heat shrinkable polyester film 13 outside flat type copper wire 11, when being lowered to stator punching, and half and half pushing in the groove.
The C-C cutaway view of Fig. 7 (phase sideline circle) is a cross-sectional end view, the end winding between phase and phase of expression motor, according to different occasions wrap in flat type copper wire 11 outside low resin mica tapes 12 and again in the bag glue mica tape 14 insulate with reinforcement.
Semi-open slot stator punching 2 is provided with the groove of some, and notch is a half opening.Its width of rebate generally be the flute profile width half add 0.7mm again.
Operation principle: stator punching is a semi-open slot, and half coil that partly becomes winding enters the side of pusher in the groove by notch, and half coil in addition down again is until intact all stator slots down.
Claims (4)
1. a medium-sized low-voltage variable-frequency motor has the winding stator core, comprise half-formed winding (1), semi-open slot stator punching (2), heelpiece (3), cell body insulating barrier (4), middle pad (5), adjusting pad (6), slot wedge (7) and installation cell body (8), half-formed winding (1) is installed in the both ends that cell body (8) is installed, it is characterized in that: be provided with the cell body insulating barrier (4) that coincide with its vallecular cavity shape in the described installation cell body (8), place heelpiece (3) at cell body insulating barrier (4) inner chamber bottom, go up lower floor's stator coil of placing by semi-open slot stator punching (2) formation at heelpiece (3), pad (5) on lower floor's stator coil, placing, go up the upper strata stator coil of placing by semi-open slot stator punching (2) formation at middle pad (5), on the stator coil of upper strata, place adjusting pad (6), go up placement slot wedge (7), upper strata stator coil at adjusting pad (6), lower floor's stator coil is connected with half-formed winding (1) circuit.
2. a kind of medium-sized low-voltage variable-frequency motor as claimed in claim 1 has the winding stator core, it is characterized in that described installation cell body (8) top end opening.
3. a kind of medium-sized low-voltage variable-frequency motor as claimed in claim 1 has the winding stator core, it is characterized in that described half-formed winding (1) is made up of linear portions and end, described straight line portion is made up of two halves, and each is bread low resin mica tape (12) and heat shrinkable polyester film (13) outside flat type copper wire (11) partly; Described end is the end winding between phase and phase of motor, bread low resin mica tape (12) outside flat type copper wire (11), and glue mica tape (14) insulate with reinforcement in wrapping again.
4. a kind of medium-sized low-voltage variable-frequency motor as claimed in claim 1 has the winding stator core, it is characterized in that described semi-open slot stator punching (2) is provided with groove, and notch is a half opening, its width of rebate be the flute profile width half add 0.7mm again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010180041A CN101860096A (en) | 2010-05-17 | 2010-05-17 | Stator core with winding for medium-sized low-voltage variable-frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010180041A CN101860096A (en) | 2010-05-17 | 2010-05-17 | Stator core with winding for medium-sized low-voltage variable-frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101860096A true CN101860096A (en) | 2010-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010180041A Pending CN101860096A (en) | 2010-05-17 | 2010-05-17 | Stator core with winding for medium-sized low-voltage variable-frequency motor |
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| CN (1) | CN101860096A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917072A (en) * | 2010-06-21 | 2010-12-15 | 无锡哈电电机有限公司 | Winding stator core of medium variable frequency motor |
| CN102611260A (en) * | 2012-04-18 | 2012-07-25 | 上海电气集团上海电机厂有限公司 | Method for inserting line in stator winding of synchronous motor of nuclear power supply |
| CN103475121A (en) * | 2012-06-06 | 2013-12-25 | 北京三一电机系统有限责任公司 | Rotor, doubly-fed generator and wire winding method |
| CN103855832A (en) * | 2012-12-03 | 2014-06-11 | 南阳防爆集团股份有限公司 | Formed winding structure applicable to low-voltage high-capacity motor and winding method thereof |
| CN104143891A (en) * | 2013-05-09 | 2014-11-12 | 上海电气集团上海电机厂有限公司 | Method for reducing heating temperature rise of ultra-high-speed permanent magnet synchronous motor |
| CN107332382A (en) * | 2017-07-28 | 2017-11-07 | 安徽威能电机有限公司 | The insulation system of wound rotor coil |
| CN107591975A (en) * | 2017-09-22 | 2018-01-16 | 卧龙电气集团股份有限公司 | The coil-inserting method and stator Double Layer Winding structure of a kind of stator bilayer pole coil |
| CN111010007A (en) * | 2019-12-26 | 2020-04-14 | 上海电气集团上海电机厂有限公司 | Binding method for less-glue stator coil |
-
2010
- 2010-05-17 CN CN201010180041A patent/CN101860096A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917072A (en) * | 2010-06-21 | 2010-12-15 | 无锡哈电电机有限公司 | Winding stator core of medium variable frequency motor |
| CN102611260A (en) * | 2012-04-18 | 2012-07-25 | 上海电气集团上海电机厂有限公司 | Method for inserting line in stator winding of synchronous motor of nuclear power supply |
| CN102611260B (en) * | 2012-04-18 | 2013-07-31 | 上海电气集团上海电机厂有限公司 | Method for inserting line in stator winding of synchronous motor of nuclear power supply |
| CN103475121A (en) * | 2012-06-06 | 2013-12-25 | 北京三一电机系统有限责任公司 | Rotor, doubly-fed generator and wire winding method |
| CN103855832A (en) * | 2012-12-03 | 2014-06-11 | 南阳防爆集团股份有限公司 | Formed winding structure applicable to low-voltage high-capacity motor and winding method thereof |
| CN104143891A (en) * | 2013-05-09 | 2014-11-12 | 上海电气集团上海电机厂有限公司 | Method for reducing heating temperature rise of ultra-high-speed permanent magnet synchronous motor |
| CN107332382A (en) * | 2017-07-28 | 2017-11-07 | 安徽威能电机有限公司 | The insulation system of wound rotor coil |
| CN107591975A (en) * | 2017-09-22 | 2018-01-16 | 卧龙电气集团股份有限公司 | The coil-inserting method and stator Double Layer Winding structure of a kind of stator bilayer pole coil |
| CN111010007A (en) * | 2019-12-26 | 2020-04-14 | 上海电气集团上海电机厂有限公司 | Binding method for less-glue stator coil |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101013 |