CN207588585U - A kind of insulation system of single-phase two pole third gear speed governing winding inter-turn - Google Patents
A kind of insulation system of single-phase two pole third gear speed governing winding inter-turn Download PDFInfo
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- CN207588585U CN207588585U CN201721356219.0U CN201721356219U CN207588585U CN 207588585 U CN207588585 U CN 207588585U CN 201721356219 U CN201721356219 U CN 201721356219U CN 207588585 U CN207588585 U CN 207588585U
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- speed governing
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Abstract
The utility model is related to electric machine speed regulation technical fields, disclose a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn.The stator coil not waited including four groups of numbers of turn, the wherein first group first coil for secondary first grade of phase speed governing, second group of second coil for secondary phase speed governing second gear, third group is the tertiary coil of secondary phase speed governing third gear, 4th group is the main coil as main phase, four sets of coils are respectively placed in 16 stator punching slots, and main coil individually accounts for 8 slots, remaining coil is placed in remaining 8 slots；Wherein, first coil carries out coiling together with the second coil combination and embedding forms coil group.Coil is separated by the slot bottom, notch and end of insulating layer and stator punching slot, and coil group is separated by layer insulation and tertiary coil.The utility model can be used in single-phase two pole third gear electric machine speed regulation, improve machine winding insulation tolerance energy, reduces voltage drop in motor slot, reduces turn-to-turn fault rate, promote electrical machinery life, stator slot utilization rate is high.
Description
Technical field
The utility model is related to electric machine speed regulation technical field more particularly to a kind of single-phase two pole third gear speed governing winding inter-turns
Insulation system design.
Background technology
Single-phase tap speed-regulating method is widely used as a kind of step speed regulation of little power single phase motor.Single-phase tapping method
Speed control principle is, by changing the connection mode of intermediate winding and main winding and auxiliary winding, to adjust the size in magnetic field and ovality, from
And adjust the rotating speed of motor.It is to save reactor or governor the characteristics of speed governing in this way, at low cost, power consumption
It is small, performance is good, but technique is more complicated, turn-to-turn fault rate is high, especially two pole third gear speed regulating motors.
The main reason for turn-to-turn insulation failure is motor damage.In conventional structure, secondary phase tap third gear speed governing stator winding
Three one Co-wound coils of speed governing winding, offline together are generally adopted by, pass through the order of connection of three certain tappings, it is real
Existing motor third gear speed governing.Decline insulation resistance since winding makes moist, foreign matter intrusion winding internal damage insulation, pernicious gas corruption
It is bad that the reasons such as erosion be easy to cause turn-to-turn.According to incompletely statistics, the single-phase two pole third gear speed governing interturn in stator windings of conventional structure is bad
Rate is more than 30%, causes great waste of material, economic loss and the loss of time, exists simultaneously very big hidden danger of quality.
Improve single-phase secondary two pole third gear speed regulating motor insulation performance of phase tap, using reinforced insulation structure when can pass through design
To avoid or reduce turn-to-turn short circuit, one is by the difference coilings of three sets speed governing windings, be then divided into other embedding, and three sets of speed governing
Between winding plus every phase line, then it can be in direct contact to avoid each group coil there are high potential difference, but with regard to small power electric machine stator
The characteristics of groove area is less can not realize two layers of layer insulation of addition, and complex process, substantially increase copper factor, offline tired
Difficulty also reduces slot effective rate of utilization, affects motor performance.
Utility model content
The utility model is in view of the above-mentioned problems, provide a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn.
The utility model is by one Co-wound coil of first coil and the second coil, the embedding of third gear speed governing pair phase winding, intermediate nothing
Insulating paper separates.Coil group, tertiary coil, the winding of the 4th coil and the stator that first coil and the second coil combination are formed rush
Slot bottom, notch, end, the interlayer of film trap contact, are separated with insulating paper, are reduced voltage drop in motor slot with this, are reduced turn-to-turn
Failure rate promotes electrical machinery life, and easy to operate, and stator slot utilization rate is high.
In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals：
A kind of insulation system of single-phase two pole third gear speed governing winding inter-turn, including four groups of stator coils, wherein first group is
The first coil of secondary first grade of phase speed governing, second group of second coil for secondary phase speed governing second gear, third group are secondary phase speed governing the
The tertiary coil of third gear, the 4th group is the main coil as main phase, and coil is placed in stator punching slot, if determining where main coil
Sub- punching slot is the first stator punching slot, remaining stator punching slot is set as the second stator punching slot；It is characterized in that：First is fixed
Main coil is only placed in sub- punching slot, first coil, the second coil and tertiary coil are placed in the second stator punching slot；Wherein,
First coil carries out coiling together with the second coil combination and embedding forms coil group；First stator punching trench bottom is equipped with slot
Bottom insulating layer, top are equipped with capping insulating layer, and main coil is located between bottom insulation layer and capping insulating layer；Second stator punching
Trench bottom is equipped with bottom insulation layer, and top is equipped with capping insulating layer, and tertiary coil and coil group are located at bottom insulation layer and interlayer
Between insulating layer, interlayer insulating film is equipped between tertiary coil and coil group.
Selection coil number differs smaller first coil and the second coil, and coiling is reduced and tertiary coil nail together
Potential difference reduces breakdown situation.The utility model embeds position and winding by designing coil windings, sets insulating layer, double
Guan Qi, which gets off, improves insulation performance.
Preferably, first coil is connect with the second coil, the second coil is connect with tertiary coil；The first coil other end
It is connect with main coil, the junction between coil is wrapped up with insulating sleeve.The main part of stator coil is all embedded rushes in stator
In film trap, by a bit of interconnection of pull-out, this part is also required to insulate.
Preferably, four groups of stator coil numbers of turn differ.In actual production, according to occasion and the mode of connection, stator coil
Method for winding on can be adjusted correspondingly.
Preferably, stator punching slot is 16, wherein the first stator punching slot is 8, the second stator punching slot is 8
It is a.The utility model is suitable for the speed governing winding of electric fan, and 16 are stator punching slot number amounts common in electric fan.
Preferably, capping insulating layer, which extends to stator punching slot both ends, covers stator coil.Stator punching slot both ends are normal
Wired extraction, capping insulating layer extend to stator punching slot both ends, effectively to being located at the coil sections at stator punching slot both ends
It insulate.
Preferably, tertiary coil, main coil and coil group are embedded in the form of the Distributed Winding that span is 6 in stator punching
In slot, the first coil embedded in each second stator punching slot is identical with the turn ratio of the second coil, the second stator punching slot
In first coil be sequentially connected the first speed governing winding of composition in order, the second coil in the second stator punching slot in order according to
Secondary connection forms the second speed governing winding.The utility model realizes motor third gear by the order of connection of three speed governing tappings
Speed governing by distributing the number of turn, can control voltage difference between the different windings in each slot in a certain range, improve motor
Insulating properties.
Preferably, capping insulating layer, interlayer insulating film and bottom insulation layer are insulating layer made of insulating paper；Insulating paper
Thickness is not less than 0.25mm.Insulating paper separates different windings, improves motor insulating properties, reduces turn-to-turn fraction defective.
The utility model has significant technique effect as a result of above technical scheme：It can be used in single-phase two pole
Third gear electric machine speed regulation can improve machine winding insulation tolerance energy, reduce voltage drop in motor slot, reduce turn-to-turn fault rate,
Electrical machinery life is promoted, and easy to operate, stator slot utilization rate is high.
Description of the drawings
Fig. 1 is the utility model coil configuration structure diagram.
Fig. 2 is the utility model coil configuration structural representation Fig. 2.
Fig. 3 is the utility model pair phase slot inner structure schematic diagram.
The toponym that each number designation is referred in the figures above is as follows：Wherein, 1-first coil, the 2-the second line
Circle, 3-tertiary coil, 4-main coil, 5-coil group, 6-capping insulating layer, 7-interlayer insulating film, 8-bottom insulation layer,
9-stator punching slot.
Specific embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 1 to Figure 3, a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn, including four groups of stator lines
Circle, wherein first group of first coil 1 for secondary first grade of phase speed governing, second group of second coil 2 for secondary phase speed governing second gear, the
Three groups of tertiary coils 3 for secondary phase speed governing third gear, the 4th group is the main coil 4 as main phase, and coil is placed in stator punching slot 9
It is interior.Stator punching slot 9 is 16, wherein the first stator punching slot is 8, the second stator punching slot is 8.
If the stator punching slot 9 where main coil 4 is the first stator punching slot, remaining stator punching slot 9 is set as second
Stator punching slot；Main coil 4 is only placed in first stator punching slot, first coil 1, the second coil 2 and tertiary coil 3 are placed in the
In two stator punching slots；Wherein, 1 and second coil 2 of first coil, which is combined, carries out coiling and embedding formation coil group 5；
First stator punching trench bottom is equipped with bottom insulation layer 8, and top is equipped with capping insulating layer 6, and main coil 4 is located at bottom insulation layer 8
Between capping insulating layer 6；Second stator punching trench bottom is equipped with bottom insulation layer 8, and top is equipped with capping insulating layer 6, third
Coil 3 and coil group 5 are located between bottom insulation layer 8 and interlayer insulating film 7, and interlayer is equipped between tertiary coil 3 and coil group 5
Insulating layer 7.Capping insulating layer 6 extends to 9 both ends of stator punching slot and covers stator coil.
First coil 1 is connect with the second coil 2, and the second coil 2 is connect with tertiary coil 3；1 other end of first coil and master
Coil 4 connects, and the junction between coil is wrapped up with insulating sleeve.Four groups of stator coil numbers of turn differ.
Tertiary coil 3, main coil 4 and coil group 5 are embedded in the form of the Distributed Winding that span is 6 in stator punching slot 9,
The first coil 1 embedded in each second stator punching slot is identical with the turn ratio of the second coil 2, in the second stator punching slot
First coil 1 is sequentially connected the first speed governing winding of composition in order, and the second coil 2 in the second stator punching slot is in order successively
Connection forms the second speed governing winding.
Capping insulating layer 6, interlayer insulating film 7 and bottom insulation layer 8 are insulating layer made of insulating paper, and insulating paper thickness is not
Less than 0.25mm.
In the present embodiment, 16 stator punching slots 9 are shared, the first coil 1 of secondary phase, the second coil 2 and tertiary coil 3 are embedding
It puts in 1,6,7,8,9,14,15, No. 16 slot, after completing embedding, first coil 1, the second coil 2 and tertiary coil 3 are sequentially connected.
Main coil 4 is embedded in 2,3,4,5,10,11,12, No. 13 slots.First coil 1, the second coil 2, tertiary coil 3 and main coil 4
Turn ratio is：35:87:237:385.After the completion of offline, the stator coil equal turn numbers in each slot of main phase, secondary phase it is each
Stator coil equal turn numbers in slot.
Insulating paper is 6641 model insulating paper of F grades, and insulating sleeve is 2741 model insulating sleeve of F grades.
It is analyzed by taking the secondary phase tap winding in the single-phase two pole winding construction of 16 slots as an example, first coil 1, the second line
Circle 2, tertiary coil 3 and 4 turn ratio of main coil are：35:87:237:385, when the prior art is motor processing, by three speed governing
The coiling together all in same slot of the coils such as winding.When individually applying 2100V voltages to secondary phase speed governing winding, first in slot
The potential difference of circle or last circle will be equal to or more than 1400V, hence it is evident that more than insulation system withstanding voltage range.
Using the insulation system of the utility model, need to the coil of the coil of secondary first grade of phase speed governing and second gear be subjected to group
It closes, then coiling is carried out in stator slot with the coil of secondary phase speed governing third gear.Different winding overhangs are spaced one from stator slot, together
Sample is under 2100V voltages, and maximum voltage drop about 700V, insulation system disclosure satisfy that requirement in slot.
The turn-to-turn insulation test of stator integration test, principle are to be added on tested winding both ends with a high voltage narrow pulse, this
Pulse energy generates a self-oscillation in parallel between winding and matching capacitance, and due to the presence of winding D.C. resistance, this is humorous
It shakes for a decaying wave and comparatively fast levels off to zero, analyze the difference of tested winding waveform and standard winding waveform, you can
Judge the quality of tested winding, judge that it is bad with the presence or absence of turn-to-turn short circuit or turn-to-turn insulation.It is each to model same before and after improvement
100 stators are manufactured experimently, are tested.It is compared, see the table below by testing：
When turn-to-turn difference in areas is more than 20%, judge unqualified.
Conventional structure is completely superior to using the winding type of the technical program structure, disqualification rate is reduced by original 32%
To 2%, improvement is apparent.
The utility model structure, simple in structure, securely and reliably, convenient and efficient, effect is preferable.
In short, the above is only the preferred embodiment of the present invention, it is all according to present utility model application the scope of the claims institute
The equivalent changes and modifications of work should all belong to the covering scope of the utility model patent.
Claims (7)
1. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn, including four groups of stator coils, wherein first group is pair
The first coil (1) that first grade of phase speed governing, second group of second coil (2) for secondary phase speed governing second gear, third group are mutually adjusted to be secondary
The tertiary coil (3) of fast third gear, the 4th group is the main coil (4) as main phase, and coil is placed in stator punching slot (9), if
Stator punching slot (9) where main coil (4) is the first stator punching slot, remaining stator punching slot (9) is set as the second stator
Punching slot；It is characterized in that：Main coil (4), first coil (1), the second coil (2) and the are only placed in first stator punching slot
Three-winding (3) is placed in the second stator punching slot；Wherein, first coil (1) combines carry out coiling with the second coil (2)
Coil group (5) is formed with embedding；First stator punching trench bottom is equipped with bottom insulation layer (8), and top is equipped with capping insulating layer
(6), main coil (4) is located between bottom insulation layer (8) and capping insulating layer (6)；Second stator punching trench bottom is equipped with slot bottom
Insulating layer (8), top are equipped with capping insulating layer (6), and tertiary coil (3) and coil group (5) are located at bottom insulation layer (8) and interlayer
Between insulating layer (7), interlayer insulating film (7) is equipped between tertiary coil (3) and coil group (5).
2. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn according to claim 1, it is characterised in that：The
One coil (1) is connect with the second coil (2), and the second coil (2) is connect with tertiary coil (3)；First coil (1) other end and master
Coil (4) connects, and the junction between coil is wrapped up with insulating sleeve.
3. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn according to claim 1, it is characterised in that：Four
The group stator coil number of turn differs.
4. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn according to claim 1, it is characterised in that：It is fixed
Sub- punching slot (9) is 16, wherein the first stator punching slot is 8, the second stator punching slot is 8.
5. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn according to claim 1, it is characterised in that：Slot
Lid insulating layer (6) extends to stator punching slot (9) both ends and covers stator coil.
6. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn according to claim 1, it is characterised in that：The
Three-winding (3), main coil (4) and coil group (5) are embedded in the form of the Distributed Winding that span is 6 in stator punching slot (9), often
The first coil (1) embedded in a second stator punching slot is identical with the turn ratio of the second coil (2), in the second stator punching slot
First coil (1) be sequentially connected the first speed governing winding of composition in order, the second coil (2) in the second stator punching slot is by suitable
Sequence is sequentially connected, and forms the second speed governing winding.
7. a kind of insulation system of single-phase two pole third gear speed governing winding inter-turn according to claim 1, it is characterised in that：Slot
Lid insulating layer (6), interlayer insulating film (7) and bottom insulation layer (8) are insulating layer made of insulating paper, and insulating paper thickness is not less than
0.25mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721356219.0U CN207588585U (en) | 2017-10-20 | 2017-10-20 | A kind of insulation system of single-phase two pole third gear speed governing winding inter-turn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721356219.0U CN207588585U (en) | 2017-10-20 | 2017-10-20 | A kind of insulation system of single-phase two pole third gear speed governing winding inter-turn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207588585U true CN207588585U (en) | 2018-07-06 |
Family
ID=62727990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721356219.0U Active CN207588585U (en) | 2017-10-20 | 2017-10-20 | A kind of insulation system of single-phase two pole third gear speed governing winding inter-turn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207588585U (en) |
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2017
- 2017-10-20 CN CN201721356219.0U patent/CN207588585U/en active Active
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