CN102624123A - Duplex winding rotor brushless double-fed motor - Google Patents
Duplex winding rotor brushless double-fed motor Download PDFInfo
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- CN102624123A CN102624123A CN2012100788947A CN201210078894A CN102624123A CN 102624123 A CN102624123 A CN 102624123A CN 2012100788947 A CN2012100788947 A CN 2012100788947A CN 201210078894 A CN201210078894 A CN 201210078894A CN 102624123 A CN102624123 A CN 102624123A
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Abstract
The invention relates to a duplex winding rotor brushless double-fed motor and in particular relates to a design and a design method of stator and rotor windings of the motor. The invention mainly aims at solving the technical problems of winding design and the like of the motor to improve speed regulation performance of the motor and provides a winding design principle and a winding design method. The technical scheme has main points that the duplex winding rotor brushless double-fed motor comprises stator and rotor windings of the motor, the overall structure of the motor is a single-stator and single-rotor iron core structure, a rotor adopts a duplex rotor winding structure of which the pole number is same as that of the stator winding, the stator winding adopts a single winding in 3Y/3Y connection or a duplex winding, and the rotor adopts a duplex winding; and the multipole connection of the duplex winding adopts 3Y connection, and less-pole connection adopts Y connection.
Description
Affiliated technical field
Patent of the present invention relates to a kind of brushless dual-feed motor.
Background technology
At present, the rotor structure pattern that brushless dual-feed motor adopts usually has four kinds, i.e. the reluctance type of distributed, the common salient pole type of cage modle, band magnetic barrier and axially lamination reluctance type.No matter adopt which kind of rotor structure, its effect all is through specific magnetic structure, produces the magnetic resistance difference of ac-dc axis direction, thereby makes the gap field of the different numbers of poles of power winding and the generation of control winding be able to modulation.When the number of pole-pairs of the power winding of brushless double-fed machine stator and control winding is respectively P
PAnd P
CThe time, in order to realize the number of poles transformation of rotor, the number of pole-pairs of rotor is typically designed to Pr=Pp+Pc.The rotor of brushless dual-feed motor be coupled simultaneously number of poles different power winding and control winding often are called " level number converter ", and the power of its effect directly affects motor properties.
Summary of the invention
The purpose of patent of the present invention provides the brushless dual-feed motor of a kind of rotor two cover rotor winding structures identical with the stator winding number of poles.
Patent of the present invention solves the technical scheme that its technical problem adopted: it comprises the stator and the rotor winding of motor; Rotor adopts the two cover rotor winding structures identical with the stator winding number of poles; Stator winding adopts 3Y/3Y to connect single cover winding or two cover winding of method, and rotor is two cover windings; The multipole method that connects of this pair cover winding is that 3Y connects method, and few very Y connects method.Single cover winding carries out design of Windings by bipolar slot-number phase graph, and two cover windings carry out design of Windings by two one pole slot-number phase graphs.The motor overall structure is single stator and single rotor core construction.
Design of Windings is the brushless dual-feed motor key for design, should pay attention to following principle during design of Windings:
1), and, reasonably confirms the number of poles of good winding to the influence of motor performance based on the needs of speed adjustable range.In order to reduce the capacity of frequency converter, the number of poles of stator power winding should be greater than the number of poles of control winding.
2) the winding scheme will accomplish to be 60 °～120 ° facies tracts as far as possible, and technology is simple, and the winding lead-out wire is not more than the six roots of sensation.
3) winding should be designed to three-phase symmetric winding, and carries out harmonic analysis, accomplishes that harmonic content is little.Guarantee that no mutual inductance electromotive force produces between the mutual winding, this point is the most important in design of Windings.
4) when adopting the winding scheme of multi-channel parallel, analyze the phase relation of each electric potential of branch of parallel connection, guarantee that each electric potential of branch equates to avoid the generation of circulation, if circulation is difficult to avoid really, also should the circulation situation be appeared in the few utmost point winding during design.
According to above design of Windings principle, patent of the present invention proposes by the single cover of bipolar slot-number phase graph design winding scheme, and by two one pole slot-number phase graph designs, two cover winding schemes, its method for designing and step are following:
Single cover design of Windings step:
1) the draw bipolar slot-number phase graph of determined two numbers of poles of brushless dual-feed motor, and connect requirements division facies tract by winding;
2) confirm 9 sections coil groups that 3Y/3Y connects, that is: Aa, Ab, Ac, Ba, Bb, Bc, Ca, Cb, Cc;
3) generally multipole winding is confirmed as 60 ° of facies tracts, few utmost point winding is confirmed as 60 °～120 ° facies tracts;
4) adjust coil ratio in each coil groups, the electromotive force same-phase that makes each branch road of parallel connection is with size.
Two cover design of Windings steps:
1) the draw slot-number phase graph of multipole winding, and confirm the genus mutually of each line chart by 60 ° of facies tracts;
2) the draw slot-number phase graph of few utmost point winding, and confirm the genus mutually of each line chart by 60 °～120 ° facies tracts;
3) set by step 1) and 2) the multipole winding of confirming and the coil groove of few utmost point winding number, be arranged in respectively under the slot-number phase graph of few utmost point winding and multipole winding;
4) confirm multipole winding and the method that connects of lacking utmost point winding, guarantee that inner no circulation of winding and mutual inductance electromotive force produce.
Unique or the crucial part of patent of the present invention is: single cover winding of applying double pole slot-number phase graph design brushless dual-feed motor; Two cover windings of two one pole slot-number phase graph design brushless double feeds; Change rotor cage type and magnetic resistance pattern and be two cover winding constructions, its number of poles equates with stator power winding and control winding number of poles respectively; Adopt single stator, single rotor structure on the motor overall structure.
In sum, patent of the present invention adopts the brushless double-fed motor structure of single stator, single rotor; Stator winding can adopt bipolar slot-number phase graph or one pole slot-number phase graph, is designed to the structure of single cover winding or two cover windings; The rotor winding can adopt the one pole slot-number phase graph to be designed to two cover winding constructions.The winding of design can guarantee the performance requirement of brushless dual-feed motor, the acyclic stream of the winding of multi-channel parallel, the generation of no mutual inductance electromotive force between winding simultaneously.The mode of connection that single cover winding is generally adopted 3Y/3Y, and the mode of connection of two cover windings is: multipole employing 3Y connects method, and few utmost point adopts Y to connect method.Therefore; Patent of the present invention has the alternating current machine of synchronous machine and asynchronous machine characteristics simultaneously; Its structure and operation logic and traditional alternating current machine have bigger difference; Have number of poles different power winding and control winding on the stator of brushless dual-feed motor, it modulates the energy converting between mechanical that realizes motor through the harmonics of magnetic force of rotor to the rotating magnetic field of the different numbers of poles of stator.The connected mode that patent of the present invention can be through changing the control winding and frequency, amplitude and the phase place of additional power source thereof realize the multiple operational mode of brushless dual-feed motor.
Description of drawings
Below in conjunction with accompanying drawing and embodiment patent of the present invention is further specified.
Fig. 1 is 72 grooves, 6/8 utmost point, bipolar slot-number phase graph.
Fig. 2 is 72 grooves, 6/8 utmost point, single cover winding 3Y/3Y winding diagram.
Fig. 3 is the multipole winding of 36 grooves (6 a utmost point) slot-number phase graph.
Fig. 4 is few utmost point winding (4 utmost point) slot-number phase graphs of 36 grooves.
Fig. 5 is that the Y of the few utmost point winding of two cover windings connects the method sketch map.
Fig. 6 is that the multipole winding 3Y of two cover windings connects the method sketch map.
Embodiment
With 72 grooves, 6/8 utmost point; 36 grooves, 4/6 very example carry out design of Windings to single cover winding and two cover winding respectively, and combine design of Windings step and accompanying drawing that the present invention is further specified.
As shown in Figure 1 according to single cover design of Windings step.The subscript of coil numbering is represented the turn ratio (number of turn is 1: 2, and coil number respectively accounts for half the) of coil, and winding is that 3Y/3Y connects method, and corresponding winding diagram is as shown in Figure 2.Each coil groups equates at the induced potential of 6 utmost points and 8 under extremely, therefore can not produce circulation, and single simultaneously cover winding can not produce the mutual inductance electromotive force in the winding of 6 utmost points and 8 utmost points, and promptly winding inside does not have direct electrical power transmission.The copper factor that when coil spread y=10, can guarantee each groove of motor equates that 8 utmost point windings are 120 ° of facies tracts, and fundamental distribution coefficient is that 0.735,6 utmost point winding is 60 ° of facies tracts, and fundamental distribution coefficient is 0.9326.
According to two cover design of Windings steps such as Fig. 3 and shown in Figure 4, corresponding winding connection figure is as shown in Figure 5.Multipole winding is that 60 ° of facies tract 3Y connect method, and few utmost point winding is that 120 ° of facies tract Y connect method, and multipole winding is that multi-channel parallel connects method, but each electric potential of branch equates that so acyclic stream, warp analysis shows simultaneously, and two cover windings do not have the mutual inductance electromotive force and produce.
Brushless dual-feed motor stator core and common alternating current machine are basic identical, can use the stator punching of existing corresponding product specification during development, and reducing manufacturing cost, and that the stator winding of brushless dual-feed motor and traditional AC motor have is bigger different.The stator winding of brushless dual-feed motor can also can be made up of 2 cover windings insulated from each other 1 cover, but strictness is forbidden the power winding and controlled the direct electrical power transmission that has between winding.Because 1 cover winding can improve the utilance of slot space, it is long-pending to increase cross-sectional area of conductor, reduces copper loss, reduce leakage reactance, so brushless dual-feed motor has higher efficient and stalling torque.But improper like design of Windings, more harmonic wave can appear.
If stator adopts 2 cover winding constructions, can reduce the utilance and the electric efficiency of material, but bring bigger flexibility can for the stator design of Windings.When the power winding is supplied power with the control winding simultaneously, will produce 2 independently rotating magnetic fields of different numbers of poles in the stator winding, do not disturb power winding P mutually for making 2 power supplys
PThe induced potential that extremely rotating magnetic field is produced in stator winding should be at control winding P
CExtremely poor to potential-free between 3 leading-out terminals (being control port) of winding, when control port is switched on, can not cause the extra current of power frequency supply; In like manner require P
CExtremely to the induced potential of rotating magnetic field in stator winding, also should be at P
PExtremely poor to potential-free between the leading-out terminal of winding, do not cause the extra current of variable frequency power supply.The brushless dual-feed motor stator winding that designs like this, it is independently of one another to reach 2 power supplys, and does not have the direct transmission of electrical power, can accurately control the purpose of brushless dual-feed motor rotating speed simultaneously again.
Claims (3)
1. the brushless dual-feed motor of a double winding rotor; It comprises the stator and the rotor winding of motor; It is characterized in that: rotor adopts the two cover rotor winding structures identical with the stator winding number of poles, and stator winding adopts 3Y/3Y to connect single cover winding or two cover winding of method, and rotor is two cover windings; The multipole method that connects of this pair cover winding is that 3Y connects method, and few very Y connects method.
2. brushless dual-feed motor according to claim 1 is characterized in that: single cover winding carries out design of Windings by bipolar slot-number phase graph, and two cover windings carry out design of Windings by two one pole slot-number phase graphs.
3. according to claim 1 and 2 described brushless dual-feed motors, characteristic is: the motor overall structure is single stator and single rotor core construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100788947A CN102624123A (en) | 2012-03-14 | 2012-03-14 | Duplex winding rotor brushless double-fed motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100788947A CN102624123A (en) | 2012-03-14 | 2012-03-14 | Duplex winding rotor brushless double-fed motor |
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| CN102624123A true CN102624123A (en) | 2012-08-01 |
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| CN2012100788947A Pending CN102624123A (en) | 2012-03-14 | 2012-03-14 | Duplex winding rotor brushless double-fed motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680653A (en) * | 2015-12-28 | 2016-06-15 | 华中科技大学 | Alternating current brushless double-fed motor and design method for tooth harmonic coil-wound rotor distributed winding therefor |
| CN108880019A (en) * | 2018-07-05 | 2018-11-23 | 天津大学 | Six layers of set winding split-phase method suitable for 39 slot, 12 pole three-phase permanent magnetic synchronous motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2591843Y (en) * | 2002-12-30 | 2003-12-10 | 湖南工程学院 | Brushless double-feed motor |
| CN101039057A (en) * | 2007-03-28 | 2007-09-19 | 华中科技大学 | A. C. brushless double-fed motor |
| CN201252431Y (en) * | 2008-05-22 | 2009-06-03 | 湘潭新能电机制造有限公司 | Magneto-modulated brushless internal-feedback motor |
| CN101510702A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Wound rotor brushless double fed motor |
-
2012
- 2012-03-14 CN CN2012100788947A patent/CN102624123A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2591843Y (en) * | 2002-12-30 | 2003-12-10 | 湖南工程学院 | Brushless double-feed motor |
| CN101039057A (en) * | 2007-03-28 | 2007-09-19 | 华中科技大学 | A. C. brushless double-fed motor |
| CN201252431Y (en) * | 2008-05-22 | 2009-06-03 | 湘潭新能电机制造有限公司 | Magneto-modulated brushless internal-feedback motor |
| CN101510702A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Wound rotor brushless double fed motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680653A (en) * | 2015-12-28 | 2016-06-15 | 华中科技大学 | Alternating current brushless double-fed motor and design method for tooth harmonic coil-wound rotor distributed winding therefor |
| CN105680653B (en) * | 2015-12-28 | 2017-04-26 | 华中科技大学 | Alternating current brushless double-fed motor and design method for tooth harmonic coil-wound rotor distributed winding therefor |
| CN108880019A (en) * | 2018-07-05 | 2018-11-23 | 天津大学 | Six layers of set winding split-phase method suitable for 39 slot, 12 pole three-phase permanent magnetic synchronous motor |
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Application publication date: 20120801 |