CN201134709Y - High-voltage generator of stator winding with circular cross section - Google Patents
High-voltage generator of stator winding with circular cross section Download PDFInfo
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- CN201134709Y CN201134709Y CNU2007201177733U CN200720117773U CN201134709Y CN 201134709 Y CN201134709 Y CN 201134709Y CN U2007201177733 U CNU2007201177733 U CN U2007201177733U CN 200720117773 U CN200720117773 U CN 200720117773U CN 201134709 Y CN201134709 Y CN 201134709Y
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- stator winding
- winding
- iron core
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- voltage generator
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Abstract
The utility model relates to a high-voltage generator of a stator winding with circular cross section, which relates to the generator field and solves the problems that the existing generator has little normal output voltage, big eddy flow consumption and tedious equipment, and the limitation of the existing cooling system. The cross section of a stator winding (3) is ring shaped, the stator winding (3) is formed by a conductor (3-1), an internal semi-conductor layer (3-2), an insulating layer (3-3) and an external semi-conductor layer (3-4) in turn from the inner to outer, the conductor (3-1) is a single strand directing line or a plurality of directing lines which are winded, the external semi-conductor layer (3-4) is connected with a ground potential, a wave-shaped winding groove (2-1) is opened along the radial direction of an iron core (2), the stator winding (3) is arranged in the wave-shaped winding groove (2-1) of the iron core (2), the stator winding (3) is engaged with the gap of the wave-shaped winding groove (2-1), at least four round radiating grooves (2-2) are evenly opened on the circumferential direction of the iron core (2) yoke, and radiating water pipes (4) are arranged in the round radiating grooves (2-2). The utility model integrates electrification and boost pressure, whose total structure is reliable, and has the advantages of little land occupation, little maintenance and high total efficiency, and the efficiencies and benefits of a power plant are improved.
Description
Technical field
The utility model relates to electrical generator fields, relates in particular to a kind of high-voltage generator.
Background technology
Traditional large-scale rotary electric machine line rod is that the rectangle cross section conductor of main insulation is formed by the high epoxy of outsourcing dielectric strength, is to reduce eddy current loss, and each strand must be insulated from each other, and rod along the line replaces by the shape of complexity.For making electric field even, avoid producing corona, must adopt complicated measure in the winding terminal zone.The traditional design of generator makes the rated output voltage of generator be difficult to surpass 30～35kV (China is up to 20kV at present).On the contrary, the electrical network transmission voltage improves gradually, the highest at present 800kV that reached.
In traditional medium and small motor, all adopt air as coolant.When air when motor internal flows through, the heat that motor produced is taken away.When the capacity of motor was very big, the limitation of this type of cooling was just very outstanding.So large-size machine uses hydrogen, oil or non-conductive water as coolant, blast but hydrogen easily and air is mixed, also must there be a cover control appliance to guarantee that outside air can not penetrate into motor internal, as being that medium has leakage, causes the hidden danger of fire with oil, and when water during as coolant, water must adopt and filter non-conductive water, needs other filtration setting.
The utility model content
The utility model is in order to solve the problem that the existing rated output voltage of available engine is little, eddy current loss is big, equipment is numerous and diverse, and the limitation of existing cooling system, and has proposed a kind of high-voltage generator of circular cross-section stator winding.
The high-voltage generator of circular cross-section stator winding of the present utility model is made up of stator and rotor; Stator is made up of support 1, iron core 2, stator winding 3 and heat dissipation pipe 4; The cross section of stator winding 3 is circular; Stator winding 3 is followed successively by conductor 3-1 from inside to outside, internal semiconductive layer 3-2, insulating barrier 3-3, outside semiconductive layer 3-4 form, conductor 3-1 be single cord or hinge around stranded conductor, outside semiconductive layer 3-4 links to each other with earth potential; Have unrestrained type slot for winding 2-1 along iron core 2 radial direction; Stator winding 3 places in the unrestrained type slot for winding 2-1 of iron core 2, stator winding 3 and unrestrained type slot for winding 2-1 matched in clearance; Evenly have at least four circular radiating groove 2-2 on the circumferencial direction of iron core 2 yokes, heat dissipation pipe 4 places in the circular radiating groove 2-2.
The utlity model has following advantage:
Efficient: the efficient of the power plant of use the utility model motor is higher by 0.5～2.0% than the efficient of a conventional power plant.For the power plant of a 120MW, then efficient is high by 1.5%.This means that the power plant with the utility model motor will will effectively improve the economic benefit of power plant than the electricity of conventional power plant fecund 1.8MW.
The reactive power capacity: generator of the present utility model has reduced the loss of the reactive power of step-up transformer, but the reactive loss of himself is amid a sharp increase, be durable design, but it can being under the overload situations than the reactive power compensator longer time owing to high-voltage generator.This is very favorable under the disturbance situation of high-voltage transmission electrical network.
Safeguard availability:, therefore safeguard more convenient simple because there is still less element in the power plant of being set up by high-voltage generator with respect to traditional power plant.High-voltage generator is worked under the situation of high voltage low current, and therefore, the heat that the heat that produces on the stator winding will produce than the stator winding of the conventional electric generators of equal-wattage grade is low.Thus, the high-voltage power function is moved at low temperatures, makes the material of stator winding bear lower pressure, will make like this its produce still less fault and the availability of Geng Gao.
Fault current: motor of the present utility model and conventional electric generators compare, and sudden short-circuit current is more much smaller than what estimate.
Output investment ratio is: cooling system is simplified, overcome to use and hydrogen-cooledly easily blasted; Use water-cooled to need the shortcoming of filter; Directly adopt pure running water, need not to filter, saved relevant device, cost is reduced greatly; Compare with conventional electric generators, also there is minimizing in the power station of building the utility model generator than the gross investment of building the conventional electric generators power station, and equipment manufacturing cost can be saved about 10%.
The environmental protection factor: the power station of using energy converter is to the raising because of efficient of the significant contribution of environment, thereby reduces the demand to natural resources.Owing to saved step-up transformer, just avoided transformer leakage of oil environment and the safety problem of waiting on fire.
Process safety: because winding does not need transposition, saved complicated transposition technology make inserting-coil process simplify and technology for binding simple; Realized that winding rolls off the production line and assembles integrated; The end is a zero potential during operation, can fine assurance operator safety.
Utilize the utility model can cancel generating pusher side switch, bus, surge protector, step-up transformer and their corresponding capital construction, also simplified the cooling system of itself, overall cost is reduced significantly; Meritorious and the reactive loss that has not also had simultaneously these equipment to bring uses this high-voltage motor directly to be incorporated into the power networks, and it is integrated just to generate electricity, boost, and general structure is reliable, takes up an area of to lack, and maintenance is few, and the gross efficiency height improves the efficient of power plant and benefit; Because equipment reduces, the availability factor of system improves, and reliability improves, and maintenance cost reduces; It is usually than the inertia constant (GD of conventional electric generators
2) big, help safety, the stable operation of electric power system; Its operation stability and conventional generator relatively improve a lot; Its efficient height is produced the same fuel used minimizing of electric energy, can reduce toxic emission; Owing to cancelled step-up transformer, eliminated the harm that brings because of leakage of oil, catch fire etc., so the utilization of high-voltage generator benefited also to environmental protection.
Description of drawings
Fig. 1 is a longitudinal sectional view of the present utility model; Fig. 2 and Fig. 3 are the structural representations of stator winding 3; Iron core 2 radial cross-section when Fig. 4 is the insulating barrier 3-3 uniform winding of stator winding 3; Fig. 5 is a portion enlarged drawing of Fig. 4; Fig. 6 is embedded with iron core 2 radial cross-section of slot wedge 2-3 when being the insulating barrier 3-3 uniform winding of stator winding 3; Fig. 7 is the b portion enlarged drawing of Fig. 6; Fig. 8 is the insulating barrier 3-3 ladder stepping of stator winding 3 iron core 2 radial cross-section when twining; Fig. 9 is the c portion enlarged drawing of Fig. 8; Figure 10 is iron core 2 radial cross-section that the insulating barrier 3-3 ladder stepping of stator winding 3 is embedded with slot wedge 2-3 when twining; Figure 11 is the d portion enlarged drawing of Figure 10.
Embodiment
Embodiment one: in conjunction with Fig. 1～Figure 11 present embodiment is described, present embodiment is made up of stator and rotor; Stator is made up of support 1, iron core 2, stator winding 3 and heat dissipation pipe 4; The cross section of stator winding 3 is circular; Stator winding 3 is followed successively by conductor 3-1 from inside to outside, internal semiconductive layer 3-2, insulating barrier 3-3, outside semiconductive layer 3-4 form, conductor 3-1 be single cord or hinge around stranded conductor, outside semiconductive layer 3-4 links to each other with earth potential; Have unrestrained type slot for winding 2-1 along iron core 2 radial direction; Stator winding 3 places in the unrestrained type slot for winding 2-1 of iron core 2, stator winding 3 and unrestrained type slot for winding 2-1 matched in clearance; Evenly have at least four circular radiating groove 2-2 on the circumferencial direction of iron core 2 yokes, heat dissipation pipe 4 places in the circular radiating groove 2-2.The cross section of stator winding 3 is circular, and from Maxwell equation as can be known, round conductor produces uniform electric field around.Has the growth that causes generator output voltage, the voltage that it is sent surpasses 36kV so that it can directly link to each other with transmission and distribution network, reach the electric pressure identical with transmission network, high-voltage generator unites two into one the function of conventional electric generators and transformer, and make electric field strength reach 10kV/mm, because the stator voltage of high-voltage generator increases substantially, its stator current is well below the stator current with the power conventional generator so.Low current has reduced with regard to the mechanical force that means the end winding, and the problem of winding overhang is simple with respect to conventional generator.In order to guarantee that crust maintains earth potential, the outside semiconductive layer 3-4 of stator winding 3 has certain conductive capability, and electric field is confined in the cable, needn't be as in conventional generator, and the electric field in the coil region of control end has been simplified electric field controls.All zones at winding all do not have the danger of partial discharge or corona; Because the end winding zone is in earth potential, personal safety has obtained guarantee.Conductor 3-1 adopt single cord or hinge around stranded conductor, solved the eddy current loss problem.Most heat produces in stator core, and stator core is limited in earth potential.An advantage that does not have the axial cooling system in radiativity air channel is that stator core becomes evenly, and this has just shortened total core length and has improved efficient.Because cooling system is limited in earth potential, so just need not be with the deionized water in traditional water-cooled stator winding.Therefore, ordinary tap water can be used as the coolant of high-voltage generator stator core, and rotor and end cooling air mode.
Embodiment two: in conjunction with Fig. 4～Fig. 7 present embodiment is described, present embodiment and embodiment one difference are to place the insulating barrier 3-3 uniform winding of the stator winding 3 in the unrestrained type slot for winding 2-1 on internal semiconductive layer 3-2.Other composition is identical with embodiment one with connected mode.
Embodiment three: present embodiment is described in conjunction with Fig. 8～Figure 11, present embodiment and embodiment one difference are to place the stator winding 3 in the unrestrained type slot for winding 2-1 to be divided into the m group, m 〉=2 divide into groups to increase progressively gradually to first group of thickness to the insulating barrier 3-3 of the stator winding 3 of m group that circumferencial direction distributes from the center of circle of iron core 2.Other composition is identical with embodiment one with connected mode.What the insulation 3-3 of the stator winding 3 in the present embodiment adopted is that the ladder stepping is twined, and this is because the induced voltage of generator increases to the line end gradually from the stator winding neutral point, makes cable produce different electric stresss along winding direction.Therefore, use thin insulation at the former circles of winding, the number of turn subsequently increases insulation thickness successively, uses ladder stepping insulation can also guarantee the constant of the stator facewidth, and this species stage stepping insulation is twined to make and laminated the iron core utilization that also is optimized.
Embodiment four: in conjunction with Fig. 2 and Fig. 3 present embodiment is described, present embodiment and embodiment one difference are that insulating barrier 3-3 adopts silicon dielectric crosslinked polyethylene.Other composition is identical with embodiment one with connected mode.
Embodiment five: present embodiment is described in conjunction with Fig. 6, Fig. 7, Figure 10 and Figure 11, present embodiment and embodiment two differences are that the long limit of unrestrained type slot for winding 2-1 is a straight line, and increased slot wedge 2-3, the tube structure that slot wedge 2-3 is made by plastic material, slot wedge 2-3 is arranged between the cell wall of stator winding 3 and unrestrained type slot for winding 2-1, fill with liquid silica gel in the pipe of slot wedge 2-3, the tube wall solidifying and setting of liquid silica gel and slot wedge 2-3 is structure as a whole.Other composition is identical with embodiment one with connected mode.Wave type slot for winding 2-1 is very dark and tooth is very long, mechanically cause the bending stiffness of tooth to reduce easily, produce low-frequency resonance, in order to ensure there being good electrical contact to adopt slot wedge 2-3 to fix between stator winding 3 and the iron core 2, can reducing stator winding 3 simultaneously and in unrestrained type slot for winding 2-1, vibrate and cause that outside semiconductive layer weares and teares.
Embodiment six: in conjunction with Fig. 4～Figure 11 present embodiment is described, present embodiment and embodiment one difference are that heat dissipation pipe 4 is crosslinked polyethylene water pipes.Other composition is identical with embodiment one with connected mode.The utilization of crosslinked polyethylene water pipe can be eliminated risk of short-circuits between pipe and iron core, also can eliminate the problem that produces eddy current in joint and pipe.
Claims (6)
1, the high-voltage generator of circular cross-section stator winding, it is made up of stator and rotor; It is characterized in that stator is made up of support (1), iron core (2), stator winding (3) and heat dissipation pipe (4); The cross section of stator winding (3) is circular; Stator winding (3) is followed successively by conductor (3-1) from inside to outside, internal semiconductive layer (3-2), insulating barrier (3-3), outside semiconductive layer (3-4) is formed, conductor (3-1) be single cord or the hinge around stranded conductor, outside semiconductive layer (3-4) links to each other with earth potential; Have unrestrained type slot for winding (2-1) along iron core (2) radial direction; Stator winding (3) places in the unrestrained type slot for winding (2-1) of iron core (2), stator winding (3) and unrestrained type slot for winding (2-1) matched in clearance; Evenly have at least four circular radiating grooves (2-2) on the circumferencial direction of iron core (2) yoke, heat dissipation pipe (4) places in the circular radiating groove (2-2).
2, the high-voltage generator of circular cross-section stator winding according to claim 1 is characterized in that placing insulating barrier (3-3) uniform winding of the stator winding (3) in the unrestrained type slot for winding (2-1) on internal semiconductive layer (3-2).
3, the high-voltage generator of circular cross-section stator winding according to claim 1, it is characterized in that placing the stator winding (3) in the unrestrained type slot for winding (2-1) to be divided into the m group, m 〉=2 divide into groups to increase progressively gradually to first group of thickness to the insulating barrier (3-3) of the stator winding (3) of m group that circumferencial direction distributes from the center of circle of iron core (2).
4,, it is characterized in that insulating barrier (3-3) adopts silicon dielectric crosslinked polyethylene according to the high-voltage generator of claim 2 or 3 described circular cross-section stator winding.
5, the high-voltage generator of circular cross-section stator winding according to claim 1, a long limit that it is characterized in that unrestrained type slot for winding (2-1) is a straight line, and increased slot wedge (2-3), the tube structure that slot wedge (2-3) is made by plastic material, slot wedge (2-3) is arranged between the cell wall of stator winding (3) and unrestrained type slot for winding (2-1), fill with liquid silica gel in the pipe of slot wedge (2-3), the tube wall solidifying and setting of liquid silica gel and slot wedge (2-3) is structure as a whole.
6, the high-voltage generator of circular cross-section stator winding according to claim 1 is characterized in that heat dissipation pipe (4) is the crosslinked polyethylene water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201177733U CN201134709Y (en) | 2007-12-25 | 2007-12-25 | High-voltage generator of stator winding with circular cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201177733U CN201134709Y (en) | 2007-12-25 | 2007-12-25 | High-voltage generator of stator winding with circular cross section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134709Y true CN201134709Y (en) | 2008-10-15 |
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ID=40062979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201177733U Expired - Fee Related CN201134709Y (en) | 2007-12-25 | 2007-12-25 | High-voltage generator of stator winding with circular cross section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134709Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411084A (en) * | 2016-10-09 | 2017-02-15 | 中国人民解放军海军工程大学 | High power mixed excitation motor with novel water-cooling structure |
-
2007
- 2007-12-25 CN CNU2007201177733U patent/CN201134709Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411084A (en) * | 2016-10-09 | 2017-02-15 | 中国人民解放军海军工程大学 | High power mixed excitation motor with novel water-cooling structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20111225 |