CN204168030U - Three-phase symmetrical prints winding - Google Patents
Three-phase symmetrical prints winding Download PDFInfo
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- CN204168030U CN204168030U CN201420507668.0U CN201420507668U CN204168030U CN 204168030 U CN204168030 U CN 204168030U CN 201420507668 U CN201420507668 U CN 201420507668U CN 204168030 U CN204168030 U CN 204168030U
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Abstract
Three-phase symmetrical of the present utility model prints winding, is applied to the servo drive motor of high accuracy, high dynamic performance.Be positive integer by 4M(M) sheet comprise the positive integer that 3N(N is >=4) the conductor piece overlap of root conductor forms, bondd by insulation grey cloth between each, adjacent two panels forms one group, and the mutual uniform crossover of external end head of the conductor often in group in two panels conductor piece staggers; The inner termination UNICOM of aliging between two of the conductor in the two panels conductor piece in a group, the external end head UNICOM of aliging between two of the conductor in two groups in conductor piece; According to 6 distributed windings that the rule of 60 ° of facies tract three-phase windings obtains after the superiors and undermost each 6 conductors disconnect, be designated as U+, U-, V+, V-, W+, W-, U+ connect with U-phase and obtain U phase winding, and V+ and V-is in series and obtains V phase winding, W+ connects with W-phase and obtains W phase winding, and the end of three phase windings links together.
Description
Technical field
The utility model relates to three-phase permanent magnet synchronous motor, and specifically the three-phase symmetrical of three-phase permanent magnet synchronous motor prints winding.
Background technology
At present, there are known tooth has groove three-phase permanent magnet synchronous motor due to birth defects such as location torque and air gap flux density distortion, motor torque can be made to fluctuate, produce vibration & noise, occur the fluctuation of speed, make motor can not even running, affect the performance of motor.Make motor produce undesirable vibration & noise simultaneously.In variable speed drives, when the mechanical resonance frequency of torque pulsation frequency and stator or rotor is consistent, the vibration & noise that location torque produces will be exaggerated.The existence of location torque have impact on the low-speed performance of motor in speed control system and the hi-Fix in position control system equally.
Tooth is had to have the location torque of groove three-phase permanent magnet synchronous motor mainly to comprise the location torque etc. of gullet positioning torque, the generation of rotor double-salient-pole structure.Must there is teeth groove to lay stator winding in the armature core of permagnetic synchronous motor, due to the existence of teeth groove, cause the uneven of air gap, and the magnetic flux Relatively centralized in a tooth pitch, in teeth portion, makes air-gap permeance not be constant.Also air-gap permeance can be caused not to be the consequence of constant when adopting rotor double-salient-pole structure.When the rotor rotates, the energy storage of air-gap field just changes, and produce cogging torque, this torque is constant, and it is relevant with rotor-position, thus along with rotor-position changes, just causes torque pulsation.The structure of its physical dimension with rotor, stator teeth groove, the size of air gap, the shape of magnetic pole and Distribution of Magnetic Field etc. are relevant, and how to be placed in groove with winding and in each phase winding, the factor such as feed-in how many electric currents has nothing to do.Cogging torque is the intrinsic phenomenon having tooth to have groove magneto, and it is under the cold state of armature winding, and the magnetic field produced by permanent magnet acts on the teeth groove of armature core the torque that circumferencial direction produces.Its generation comes from the tangential force between permanent magnet and armature tooth, makes the rotor of permanent magnet motor have a kind of trend of aliging with stator along a certain specific direction, attempts by rotor fixed position in some position, a kind of oscillating torque of trend generation thus.
In permanent magnet synchronous motor, known theory is: when armature supply waveform is sinusoidal wave, motor back emf waveform is also designed to sinusoidal waveform, and the electromagnetic torque of generation is exactly constant, there is not any fluctuation of electromagnetic torque.Therefore the performance of motor depends on every phase back-emf waveform to a great extent, and back emf waveform is then final to be determined by air-gap field waveform.For improving efficiency, the specific power of electric system, reducing torque ripple, generally motor air gap field waveform being designed to sine wave.Therefore, in the design of motor body, first Problems existing is exactly the sine design problem in motor air gap magnetic field.
But due to stator teeth notching, the air-gap field waveform that permanent magnetism magnetic pole produces can distort, every phase winding back electromotive force responds to generation back electromotive force linear, additive by being placed on conductor in groove, negligible amounts cutting air-gap field obtains, cause every phase winding back emf waveform to comprise larger harmonic component, these harmonic components can produce the larger fluctuation of electromagnetic torque with sinusoidal wave armature supply interaction.
At present, mainly contain with the measure solving torque ripple and adopt skewed slot or oblique pole, mark channel process, channel process of remaining silent and magnet steel shape optimum method etc., but produce effects very little and cause more complicated manufacturing process.The permanent magnet synchronous motor of current a kind of new construction adopts axial magnetic field, coiling disc type three-phase windings, avoids stator teeth notching, thus can reduce torque pulsation largely.But the coiling disc type three-phase windings adopted is tens by quantity, is concentrated the good multiturn coil of coiling to connect according to certain rules in advance and use plastics sealing to obtain with line mould, and its shortcoming is that heat dispersion is poor, complex process.The coil quantity comprised due to every phase winding is few, optimal design can not be done as required in the geometric position of conductor, causes every phase winding back electromotive force of coiling disc type three-phase windings to comprise larger harmonic component, causes larger torque pulsation.
Utility model content
The key solving the torque pulsation problem of permanent magnet synchronous motor adopts axial magnetic field, adopts without the need to the very little three-phase symmetric winding of the harmonic component of stator teeth notching, every phase back-emf simultaneously.This three-phase symmetric winding must be formed by the different and conductor easily optimizing conductor coordinate (being optimized the shape of conductor and space coordinates) in, locus a lot of by quantity.Obvious existing coiling disc type three-phase windings can not meet these requirements.In order to solve the indeterminable problem of prior art, the utility model provides a kind of three-phase symmetrical to print winding, to meet above-mentioned requirements.
Three-phase symmetrical of the present utility model prints winding, it is formed by the conductor piece overlap comprising 3N root conductor of 4M sheet, bondd by insulation grey cloth between each, adjacent two panels forms one group, and the mutual uniform crossover of external end head of the conductor often in group in two panels conductor piece staggers; The inner termination UNICOM of aliging between two of the conductor in the two panels conductor piece in a group, the external end head UNICOM of aliging between two belonging to the conductor of different group successively in two groups of conductor pieces; According to 6 distributed windings that the rule of 60 ° of facies tract three-phase windings obtains after the superiors and undermost each 6 conductors disconnect, be designated as U+, U-, V+, V-, W+, W-, U+ connect with U-phase and obtain U phase winding, and V+ and V-is in series and obtains V phase winding, W+ connects with W-phase and obtains W phase winding, and the end of three phase windings links together;
N be more than or equal to 4 positive integer;
M is positive integer.
As preferably, N is 21 ~ 91, M is 1 ~ 3.
3N root conductor in described conductor piece, shape is identical and be uniformly distributed around axle center.
The shape of the conductor in described conductor piece is made up of five sections of being connected: be from inside to outside followed successively by straightway-involute or arc section-straightway-involute or arc section-straightway.In addition, the shape of conductor can also be other various shape, as long as the mutual uniform crossover of external end head of the conductor in guaranteeing every group in two panels conductor piece staggers.The shape of conductor is the most a kind of is exactly straightway for disalignment.
The optimization that the shape of conductor is carried out through reducing to minimum requirement according to the torque pulsation making back electromotive force harmonic component produce.The optimized design Optimization Design of conductor shape being comprised to known various maturation is theoretical: as penalty function method or complex method.
Conductor material in described conductor piece is selected as thickness is the copper of 0.1mm ~ 0.5mm, aluminium, copper alloy or aluminium alloy.
The feature that above-mentioned three-phase symmetrical prints winding is:
1. the number of conductors of every phase winding is many, such as conductor piece upper conductor number equals 3N=153, i.e. N=51, adopts 4 Rotating fields, then the conductor number of every phase winding is 3N × 4 (layer)/3-12/3=4 (N-1)=200, and often extremely every phase conductor number is for reaching 5;
2. the locus of the conductor of the every phase winding of above-mentioned formation is all different, is distributed winding truly;
3., due to above-mentioned 2 features, be optimized reach the minimum target of every phase back-emf harmonic component easily via shape (comprising supporting motor cylinder permanent magnet magnetic pole radius, the magnetic pole distribution radius etc.) parameter to conductor;
4. because the conductor number on conductor piece is 3N, no matter made three-phase prints winding spatially or be all Striking symmetry on electric;
5. because multi-layer conductive sheet utilizes insulation grey cloth bonding forming, and all conductors are all be uniformly distributed but not concentrate, so three-phase of the present utility model prints winding be more conducive to heat radiation, have higher power to volume ratio.
Within three-phase of the present utility model is printed and is caused the harmonic component summation of torque ripple to can be controlled in 0.5% (relative to first-harmonic) in every phase back-emf of winding, the torque ripple caused thus can be controlled within 0.65%, is far smaller than the torque ripple of 3% ~ 10% of other type winding.Even if be not optimized, its back electromotive force harmonic component summation producing torque pulsation is 3.728%, is also the lower limit of the torque ripple of other type winding.After optimal design, the back electromotive force harmonic component summation producing torque pulsation reduces to 0.4496%.
Adopt the utility model three-phase symmetrical to print the permanent magnet synchronous motor of winding, because torque pulsation is very little, ensure that the low-speed performance of motor in speed control system and the hi-Fix in position control system.
The three-phase symmetrical that the utility model makes prints winding by being widely used in the servo-drive application of high accuracy, high dynamic performance, has good application prospect.
Accompanying drawing explanation
Fig. 1 prints winding punching figure.
Fig. 2 is punching and grey cloth schematic diagram.
Fig. 3 is that pack makes schematic diagram.
Fig. 4 is winding switching rule schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
The three-phase symmetrical of this example prints winding, is comprised the N=21 in 63(3N by 4 (M=1 in 4M)) the conductor piece overlap of root conductor forms.
In order to describe product exactly in detail, this example is described from the angle of production.
One, make punching: as shown in Figure 1, on the uniform alcu alloy film of a thickness 0.3mm, utilize punch die or chemical corrosion to make punching 1001.Punching 1001 is evenly distributed with the jet-bedding 1002 that quantity is 3N, these jet-beddings 1002 are uniformly distributed around axle center, shape is identical.The location hole 1010,1011 and 1012 of 3 minor diameters is positioned at the lower left corner, and 3 large diameter location holes 1020,1021 and 1022 are positioned at the upper right corner.The shape of jet-bedding 1002 is made up of five sections of being connected: be from inside to outside followed successively by straightway-involute section-straightway-involute section-straightway.
The remainder often opened between two jet-beddings 1002 in punching 1001 is called conductor.
The conductor piece obtained after namely so-called punching produces jet-bedding on the sheet metal of an electric conducting material.
Two, make pack: as shown in Figure 2, a slice punching 1001 overturn, jet-bedding now 1002 and the jet-bedding 1002 of Fig. 1 are mirror images each other.The location hole 1010,1020 of punching 1001 to pack into after the alignment pin of fixture in horizontal positioned, this punching locate and places the grey cloth 2001 that insulate.As shown in Figure 3, then the location hole 1010,1020 of the punching 1001 of a slice Fig. 1 is packed into alignment pin, utilize fixture pressurized, heated to be incubated, utilize the bonding effect of insulation grey cloth 2001 two panels punching 1001 to be bonded together.The conductor inner termination 3001 of now two panels punching 1001 be align between two (due to upset stack, the direction of involute or arc section is just the opposite, so external end head 3002 does not have overlapping alignment, but uniform crossover staggers mutually), fixture or punch die is utilized the part within conductor inner termination 3001 to be removed, the conductor inner termination of aliging between two (in total 6N root conductor 1003 external end head) welded, the parts obtained are called pack again.
Three, make closed printing winding: in figure 3, in pack two panels punching due to first be upset, so the external end head 3002 of two panels punching does not have overlapping alignment, but uniform crossover staggers mutually, and pack has 6N external end head 3002 in outer end.
Get two pack, between two pack, place insulation grey cloth, be inserted in by location hole the external end head overlapping alignment that alignment pin makes two pack, utilize fixture pressurized, heated to be incubated, utilize the bonding effect of insulation grey cloth two pack to be bonded together.Utilize fixture or punch die the part beyond conductor external end head 3002 to be removed, then welded by the conductor external end head 3002 alignd between two, the parts obtained are called closed printing winding.
Closed printing winding is like this made up of 4 punchings 1001, and total 12N root conductor 1003 is together in series by the welding of interior external end head.In order to understand the connection rule of conductor in this closed printing winding, suppose 3N=63(N=21), as shown in Figure 4, from the winding the superiors, be numbered the 1st layer to the 4th layer totally 4 layers.Be numbered from 01 to 63 the 3N=63 root conductor of the 1st layer counterclockwise, latter 2 of the numbering of other each layer conductor be connected with the 1st layer of certain numbering conductor is numbered identical with the 1st layer of conductor.As Fig. 4, might as well suppose from the 1st layer of the 63rd conductor 63, be connected by the conductor 4463 of external end head with the 4th layer, then be connected by the conductor 4363 of inner termination with the 3rd layer, be connected by the conductor 4263 of external end head with the 2nd layer again, be connected finally by the conductor 25 of inner termination with the 1st layer, next the conductor be connected successively is 4425, 4325, 4225, 50, 4450, 4350, 4250, 12, 4412, 4312, 4212, 37, 4437, 4337, 4237, 62, as can be seen here from the 63rd conductor 63 of the 1st layer, the 1st layer of adjacent with it the 62nd conductor 62 is got back to through 2 circumference, constantly repeat this rule, until all conductors are all together in series, form a closed printing winding.
Four, make three-phase symmetrical and print winding: according to the rule of 60 ° of facies tract three-phase windings, the conductor under a pair magnetic pole belongs to U+ successively, W-, V+, U-, W+, V-, has 6 facies tracts.The conductor belonging to U+ (or U-) is separated from closed winding and can obtain U+ (or U-) coil, then U+, U-coils connected in series is got up to obtain the U phase winding of three-phase windings.V phase, W phase are spatially symmetrical with U phase, separate and the method connected and U phase identical from closed winding.Be 3N=63 for this routine one deck number of conductors, the number of pole-pairs of magnetic pole is 5, then every extremely every phase conductor number is 2.As in Fig. 4, 62nd conductor 62 of the 1st layer, 61st conductor 61 belongs to U+ facies tract, in order to the conductor of U+ is separated from closed winding, need the 63rd conductor 63 cutting off the 1st layer, and draw the head end 4001 as U+ coil from the external end head of the 4th layer of conductor 4463 be attached thereto, the 1st layer of conductor belonging to U+ in Fig. 4 has 25, 50, 15, 37, 62, 24, 49, 14, 36, 61, its rule is 25 by span to connect, finally draw the end 4002 as U+ coil from the external end head of the 61st conductor 61 of the 1st layer, and the 4th layer of conductor 4461 be attached thereto is cut off, so far U+ coil is obtained.Fortune uses the same method, cut off the conductor that the 1st layer of conductor is numbered 3N/3=63/3=21, and draw the head end as V+ coil from the external end head of the 4th layer of conductor be attached thereto, the external end head being numbered 19 from the 1st layer of conductor is drawn as the end of V+ coil, and cut off the 4th layer of conductor be attached thereto, V+ coil can be obtained; Cut off the conductor that the 1st layer of conductor is numbered 6N/3=42, and draw the head end as W+ coil from the external end head of the 4th layer of conductor be attached thereto, the external end head being numbered 40 from the 1st layer of conductor is drawn as the end of W+ coil, and cuts off the 4th layer of conductor be attached thereto, and can obtain W+ coil.
According to the order of facies tract, be exactly U-after V+, the end of V+ is the 1st layer of conductor being numbered 19, winding span is 25, so cut off the conductor that the 1st layer is numbered 19+25=44, and draw the end as U-coil from the external end head of the 4th layer of conductor be attached thereto, owing to being W+ after U-, the conductor that 1st layer of conductor is numbered 42 is cut off, and the conductor (simultaneously cutting off the 4th layer of conductor be attached thereto) being therefore numbered 42-25=17 from the 1st layer draws the head end as U-; Fortune uses the same method, cut off the conductor that the 1st layer is numbered 2, and draw the end as V-coil from the external end head of the 4th layer of conductor be attached thereto, draw the head end as V-from the 1st layer of conductor (cutting off the 4th layer of conductor be attached thereto) being numbered 38 simultaneously; Cut off the conductor that the 1st layer is numbered 23, and draw the end as W-coil from the external end head of the 4th layer of conductor be attached thereto, draw the head end as W-from the 1st layer of conductor (cutting off the 4th layer of conductor be attached thereto) being numbered 59 simultaneously.
So far by cutting off the 1st layer and the 4th layer totally 12 conductor, obtain U+, W-, V+, U-, W+, V-is totally 6 coils, is connected by the end of U+ coil obtains U phase winding with the head end of U-coil, obtains V phase, W phase winding with method, finally U, V, W are connected into Y-connection, obtain symmetrical three-phase and print winding.
Claims (6)
1. three-phase symmetrical prints winding, it is characterized in that: it is formed by the conductor piece overlap comprising 3N root conductor of 4M sheet, bondd by insulation grey cloth between each, adjacent two panels forms one group, and the mutual uniform crossover of external end head of the conductor often in group in two panels conductor piece staggers; The inner termination UNICOM of aliging between two of the conductor in the two panels conductor piece in a group, the external end head UNICOM of aliging between two belonging to the conductor of different group successively in two groups of conductor pieces; According to 6 distributed windings that the rule of 60 ° of facies tract three-phase windings obtains after the superiors and undermost each 6 conductors disconnect, be designated as U+, U-, V+, V-, W+, W-, U+ connect with U-phase and obtain U phase winding, and V+ and V-is in series and obtains V phase winding, W+ connects with W-phase and obtains W phase winding, and the end of three phase windings links together;
N be more than or equal to 4 positive integer;
M is positive integer.
2. three-phase symmetrical according to claim 1 prints winding, it is characterized in that: the 3N root conductor in described conductor piece, and shape is identical and be uniformly distributed around axle center.
3. three-phase symmetrical according to claim 1 and 2 prints winding, it is characterized in that: N is 21 ~ 91, M is 1 ~ 3.
4. three-phase symmetrical according to claim 1 prints winding, it is characterized in that: the shape of the conductor in described conductor piece is made up of five sections of being connected: be from inside to outside followed successively by straightway-involute or arc section-straightway-involute or arc section-straightway.
5. three-phase symmetrical according to claim 1 prints winding, it is characterized in that: the shape of the conductor in described conductor piece is the straightway of disalignment.
6. three-phase symmetrical according to claim 1 prints winding, it is characterized in that: the conductor material in described conductor piece is selected as thickness is the copper of 0.1mm ~ 0.5mm, aluminium, copper alloy or aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420507668.0U CN204168030U (en) | 2014-09-04 | 2014-09-04 | Three-phase symmetrical prints winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420507668.0U CN204168030U (en) | 2014-09-04 | 2014-09-04 | Three-phase symmetrical prints winding |
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| Publication Number | Publication Date |
|---|---|
| CN204168030U true CN204168030U (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420507668.0U Withdrawn - After Issue CN204168030U (en) | 2014-09-04 | 2014-09-04 | Three-phase symmetrical prints winding |
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| Country | Link |
|---|---|
| CN (1) | CN204168030U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218711A (en) * | 2014-09-04 | 2014-12-17 | 广西师范大学 | Three-phase symmetric printed winding |
-
2014
- 2014-09-04 CN CN201420507668.0U patent/CN204168030U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218711A (en) * | 2014-09-04 | 2014-12-17 | 广西师范大学 | Three-phase symmetric printed winding |
| CN104218711B (en) * | 2014-09-04 | 2016-08-24 | 广西师范大学 | Three-phase symmetrical prints winding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150218 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |