CN101692593B - Dual-power induction motor for conveyor - Google Patents
Dual-power induction motor for conveyor Download PDFInfo
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- CN101692593B CN101692593B CN2009101708257A CN200910170825A CN101692593B CN 101692593 B CN101692593 B CN 101692593B CN 2009101708257 A CN2009101708257 A CN 2009101708257A CN 200910170825 A CN200910170825 A CN 200910170825A CN 101692593 B CN101692593 B CN 101692593B
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Abstract
The invention provides a dual-power induction motor for a conveyor, which comprises a rotor and a stator winding, and is characterized in that: the stator winding adopts sectional leading wires of each phase, changes internal connection and is suitable for two voltage ranges; and an unique delta+Y/Y+Y convertible wiring and turn-reducing technique has a high power and a low power range, the number of turns of windings connected in serial of each phase is reduced gradually, the low power corresponds to the maximum number of turns, and the high power range corresponds to the minimum number of turns, wherein the high power range has a high starting torque for heavy load starting and running, and when the starting process is finished, the high power range can be kept at the high power running or switched to low power running according to load working conditions. Besides, the automatic switching for running the two power ranges can be achieved by using two contactors according to the load changes of a coal conveyor. Thus, the dual-power induction motor for the conveyor has the characteristics of large starting torque, high running efficiency and power factor, simple and convenient control, good reliability, significant reduction of no-load current, good energy-saving effect, and the like.
Description
Technical field
The invention belongs to the motor technology field, particularly a kind of dual-power induction motor for conveyor.
Background technology
Belt conveyor is the mechanical moving device of extensive use in the China's coal-mine exploitation; It drags load and constantly changes heavy service, light running again sometimes sometimes along with the size of conveying capacity; Simultaneously; A lot of occasions also require to carry motor to have two voltage power supply abilities, and for adapting to such load running situation, motor generally will be matched by the heavy service requirement.So just caused motor actual loading rate when light running little, efficient and power factor are low.
For addressing the above problem, a lot of technical schemes were once proposed both at home and abroad, for example, and high slip motor, magneto, two stator motors also have the thyristor of employing to downgrade and press operation, variable frequency power supply, reactive power compensator, and motor stator winding adopts the Y-Δ to connect method etc.But these technical schemes or improvement in performance are little, or cost is too high, or control transformation is complicated, poor reliability.Can not really satisfy the needs of China's coal-mine conveyer, in fact also be difficult to apply.
Summary of the invention
It is big to the purpose of this invention is to provide a kind of starting torque, and operational efficiency and power factor are high, control easy, good reliability, electric current can significantly descend the dual-power induction motor for conveyor of good energy-conserving effect during zero load.
The technical scheme of the present invention for realizing that above-mentioned purpose is taked is a kind of dual-power induction motor for conveyor, comprises rotor, stator winding; Said stator winding adopts every phase sectional leading wires, changes inner the connection to be suitable for two grades of voltages, has high and low two power shelves; Stator winding has 6 leading-out terminals; Be respectively high power leading-out terminal (UH, VH, WH) and low-power leading-out terminal (UL, VL, WL), the corresponding number of turn at most of low-power shelves, the corresponding minimum number of turn of high power shelves; Connect conversion according to inside and realize Δ+Y or Y+Y connection, described two power shelves conversion adopts two contactors to realize; For Δ+Y connection, if three phase mains inserts from high power leading-out terminal (UH, VH, WH), at this moment three phase windings are that Δ connects method, corresponding high power shelves; If three phase mains inserts from low-power leading-out terminal (UL, VL, WL), at this moment three phase windings are that Δ+Y connects method, corresponding low-power shelves; For the Y+Y connection, if three phase mains inserts from high power leading-out terminal (UH, VH, WH), at this moment three phase windings are that Y connects method, corresponding high power shelves; If three phase mains inserts from low-power leading-out terminal (UL, VL, WL), at this moment three phase windings are that Y+Y connects method, corresponding low-power shelves.
Motor stator winding is every to be divided into three sections mutually, distinguishes with subscript " Δ, Y1, Y2 " respectively, and every have 5 leading-out terminals mutually, and three-phase has 15 leading-out terminals, and wherein 9 leading-out terminals are used to change that winding is inner connects, and realizes that two kinds of suitable voltages draw on demand.
Because dual-power induction motor for conveyor; Be to design for coal mine leather belt conveyer heavy-load start and the load running characteristics that constantly change; Subtract the circle technology and be based upon on the AC MACHINE WINDING THEORY basis; Through the application that time-vector method in design of Windings and computer harmonic wave are analysed method, guaranteed that corresponding two the existing characteristics separately of power shelves of winding have good performance again, can satisfy the operating mode demand of conveyer load fully.
The present invention is the motor technology field; A kind of desirable dual-power induction motor for conveyor is provided; Compared with prior art, because stator winding has adopted every phase sectional leading wires method, had and satisfied two grades of required exportable voltages of suitable different loads variation; Because stator winding has adopted unique polyphone number of turn to subtract the circle technology and the convertible mode of connection; Had selectable high and low two power shelves; Wherein the high power shelves have high start torque, are used for heavy-load start and operation, and starting process finishes; Visual loading condition keeps the operation of high power shelves or changes the operation of low-power shelves over to.And can change according to the load behavior of colliery conveyer, realize the automatic switchover of the two power shelves of operation, make motor operational system and belt conveyor load system have good matching performance.Therefore, dual-power induction motor for conveyor of the present invention, it is big to have starting torque, operational efficiency and power factor are high, control easy, good reliability, characteristics such as electric current can significantly descend during zero load, and energy-saving effect is better.
Description of drawings
Combine accompanying drawing to further specify the architectural feature of dual-power induction motor for conveyor of the present invention at present.
The structural representation of Fig. 1 motor stator winding Δ of the present invention+Y wiring;
The structural representation of Fig. 2 motor stator winding Y+Y wiring of the present invention;
Fig. 3 embodiment of the invention number of poles 2p=4, groove is counted the stator winding phase diagram of Z=48;
The three-phase slot for winding of 60 ° of facies tract windings of Fig. 4 standard number, promptly Y+Y connects the low-power shelves stator winding sketch map of method;
Fig. 5 embodiment of the invention number of poles p=2, groove is counted the structural representation of Z=48 stator winding Δ+Y wiring;
Fig. 6 embodiment of the invention number of poles p=2, groove is counted the structural representation of Z=48 stator winding Y+Y wiring;
Fig. 7 number of poles 2p=4, groove is counted Z=48, and y=10 three phase winding the harmonics of magnetic force are analyzed sketch map.
Embodiment
Structural representation like Fig. 1 motor stator winding Δ of the present invention+structural representation of Y wiring, Fig. 2 motor stator winding Y+Y wiring of the present invention; The New-type electric machine stator winding is every to be divided into three sections mutually and to distinguish with subscript " Δ, Y1, Y2 " respectively; Every have 5 leading-out terminals mutually; Three-phase has 15 leading-out terminals, and wherein 9 leading-out terminals are used to change that winding is inner connects, and realizes that two kinds of voltages draw on demand; Other 6 leading-out terminals then are to do different capacity grade conversion and draw for connecting outside three phase mains, with " UH, VH, WH " and " UL, VL, WL " differentiation, represent high and low two power grades respectively.
For Δ+Y connection, if three phase mains inserts from leading-out terminal " UH, VH, WH ", at this moment three phase windings are that Δ connects method, corresponding high power shelves; If three phase mains inserts from leading-out terminal " UL, VL, WL ", at this moment three phase windings are that Δ+Y connects method, corresponding low-power shelves.
For the Y+Y connection, if three phase mains inserts from leading-out terminal " UH, VH, WH ", at this moment three phase windings are that Y connects method, corresponding high power shelves; If three phase mains inserts from leading-out terminal " UL, VL, WL ", at this moment three phase windings are that Y+Y connects method, corresponding low-power shelves.
After electric pressure is confirmed, adopt two contactors can easyly carry out two two grades of switchings of power reliably.
The described mode of connection; Having adopted the stator winding polyphone number of turn " to subtract circle " is the design philosophy that capacity motor increases, and also promptly presses capacity motor and distributes, and the every number of turn of contacting mutually of motor windings of corresponding two power shelves reduces gradually from high to low; The corresponding number of turn at most of low-power shelves; The corresponding minimum number of turn of high power shelves makes to possess conversion regime the most reliably between each power shelves like this, keeps the working condition requirement of the efficient operation of motor in the time of also can adapting to the conveyer load variations.Technology that winding " subtracts circle " has guaranteed that through the application of time-vector method in design of Windings and computer harmonic analysis method the corresponding existing characteristics separately of two power shelves of winding have good performance again, can satisfy the operating mode demand of conveyer load fully.
Embodiment one
Embodiment is with conveyer number of poles 2p=4 commonly used, and three phase windings that groove is counted Z=48 are that example specifies.Like Fig. 3,4,5,6, shown in 7, Fig. 3 the utility model embodiment number of poles 2p=4, groove is counted the stator winding phase diagram of Z=48; The three-phase slot for winding of 60 ° of facies tract windings of Fig. 4 standard number, promptly Y+Y connects the low-power shelves stator winding sketch map of method;
On the basis of standard scheme,, select every 4 grooves number of removing mutually according to conveyer load behavior characteristics; Fig. 4 is denoted as " A Δ, B Δ, C Δ "; The three-phase slot for winding splitting scheme of corresponding high power shelves, the three-phase winding coil can adopt Y to connect method or Δ connects method, to adapt to different electric pressures.Above-mentioned 4 grooves that remove number also need insert when the low-power shelves again, and access way is decided by the method that connects that A Δ, B Δ, C Δ three-phase winding coil adopt.If the method that connects Y generally adopts single channel series connection access way; Promptly form three-phase Y+Y and connect method; If the method that connects Δ generally also can adopt single channel series connection access way under the situation of univoltage, but need to adopt the two-way parallel connection connect the method polyphone with Δ again in that two voltage condition are next, connect method and form three-phase Δ+Y.The division of two-way shunt slot number will be noted the induced potential balance between this two-way.
At the low-power shelves also is to remove a part of coil groove number on 60 ° of facies tract windings of standard basis, the motor load ability is increased, thereby obtain the high power shelves.But should carry out harmonic analysis to all possible " subtracting circle " winding scheme, screening obtains desired final winding scheme according to the harmonic analysis result.
Like Fig. 7 number of poles 2p=4, groove is counted Z=48, and y=10 three phase winding the harmonics of magnetic force are analyzed sketch map.Wherein the mmf harmonics analysis result that analyzes number of poles Z-p of high power shelves winding scheme and 60 ° of facies tract windings of standard harmonic analysis result of corresponding low-power shelves have been listed.Can find out; When line taking circle pitch y=10, every high power shelves winding scheme of removing mutually behind 4 grooves number, winding coefficient is 0.9440; Compare taller with 60 ° of facies tract winding coefficients 0.9250 of standard; And magnetic potential counter-rotating component is 0, explain that at this moment three phase windings are symmetrical, and kept higher conductor utilance.
Secondly, consider that the high power shelves are used for accomplishing the starting process of conveyer more, therefore, also must limit the just commentaries on classics high order harmonic component amplitude that turns to together with 4 utmost point first-harmonics.Analysis shows that the relative amplitude that high power shelves winding bigger high order when number of poles 52 is just changeing harmonic wave is merely 2.4449%, is no more than 4%.Therefore; According to such harmonic analysis result; And judge according to winding performance general standard; Can know the every phase winding that adopts suitable " subtracting circle " technology after having lost some coils, the corresponding winding of high power shelves has still kept and 60 ° of close superperformances of facies tract winding of standard, can satisfy application requirements.
Like Fig. 5 embodiment of the invention number of poles p=2, groove is counted the structural representation of Z=48 stator winding Δ+Y wiring; Fig. 6 embodiment of the invention number of poles p=2, groove is counted the structural representation of Z=48 stator winding Y+Y wiring; Can find out; The low-power shelves are every to have 16 coils mutually; The high power shelves are every to have 12 coils mutually; Low-power shelves and high power shelves coil number ratio are 16/12=1.33, but also can adjust according to designing requirement, obviously; Such number of turn ratio is compared with Y/ Δ conversion number of turn ratio
, more can be fit to the operating mode of motor load in most cases.
Analyze thus and can know; Stator simplex winding structure of the present invention, the new Δ+Y/Y+Y mode of connection that adopts can adapt to two kinds of voltages, and wherein Δ+Y the mode of connection or the Y+Y mode of connection have guaranteed that two power shelves only need have 6 leading-out terminals; Adopt two three-phase contactors just can switch; Control very easy to be reliably, subtract the circle technology and be based upon on the alternating current machine line group theoretical foundation, through the application of time-vector method in design of Windings and computer harmonic analysis method; Guaranteed that corresponding two the power shelves of coil not only have characteristics separately but also have good performance, can satisfy the demand of conveyer load behavior fully.Compared with prior art, it is big to have starting torque, and operational efficiency and power factor are high, control easy, good reliability, characteristics such as electric current can significantly descend during zero load, and energy-saving effect is better.Therefore its special advantages also has good prospects for application in most of electric system energy-saving field, for certain impetus has played in the technological progress of this technical field in China.
Claims (2)
1. a dual-power induction motor for conveyor has rotor, stator winding, it is characterized in that: stator winding adopts every phase sectional leading wires; Change and inner the connection be suitable for two grades of voltages; Have high and low two power shelves, stator winding has 6 leading-out terminals, is respectively high power leading-out terminal (UH, VH, WH) and low-power leading-out terminal (UL, VL, WL); The corresponding number of turn at most of low-power shelves; The corresponding minimum number of turn of high power shelves connects conversion according to inside and realizes Δ+Y or Y+Y connection, and described two power shelves conversion adopts two contactors to realize; For Δ+Y connection, if three phase mains inserts from high power leading-out terminal (UH, VH, WH), at this moment three phase windings are that Δ connects method, corresponding high power shelves; If three phase mains inserts from low-power leading-out terminal (UL, VL, WL), at this moment three phase windings are that Δ+Y connects method, corresponding low-power shelves; For the Y+Y connection, if three phase mains inserts from high power leading-out terminal (UH, VH, WH), at this moment three phase windings are that Y connects method, corresponding high power shelves; If three phase mains inserts from low-power leading-out terminal (UL, VL, WL), at this moment three phase windings are that Y+Y connects method, corresponding low-power shelves.
2. ask 1 described dual-power induction motor for conveyor according to right, it is characterized in that: motor stator winding is every to be divided into three sections mutually, distinguishes with subscript " Δ; Y1; Y2 " respectively, and every have 5 leading-out terminals mutually, and three-phase has 15 leading-out terminals; Wherein 9 leading-out terminals are used to change that winding is inner connects, and realize that two kinds of suitable voltages draw on demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101708257A CN101692593B (en) | 2009-09-01 | 2009-09-01 | Dual-power induction motor for conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101708257A CN101692593B (en) | 2009-09-01 | 2009-09-01 | Dual-power induction motor for conveyor |
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| Publication Number | Publication Date |
|---|---|
| CN101692593A CN101692593A (en) | 2010-04-07 |
| CN101692593B true CN101692593B (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101708257A Expired - Fee Related CN101692593B (en) | 2009-09-01 | 2009-09-01 | Dual-power induction motor for conveyor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102158030B (en) * | 2011-04-07 | 2014-08-20 | 南阳高特电机有限公司 | Multiwinding series connection variable volume induction motor and control device thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079080A (en) * | 1992-05-17 | 1993-12-01 | 重庆大学 | Parameter voltage variation induction motor and control device thereof |
| CN2369399Y (en) * | 1999-04-15 | 2000-03-15 | 黄士鹏 | Inductive motor with high starting torque |
| CN2432720Y (en) * | 2000-05-09 | 2001-05-30 | 李伟力 | Special-purpose high starting torque energy-saving motor for pumping unit with intelligent controlling equipment |
| CN2437072Y (en) * | 2000-01-21 | 2001-06-27 | 陈天为 | Double-power high-efficiency energy-saving motor |
| CN101447720A (en) * | 2008-12-15 | 2009-06-03 | 南阳华大博元高科技研发中心 | Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor |
-
2009
- 2009-09-01 CN CN2009101708257A patent/CN101692593B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079080A (en) * | 1992-05-17 | 1993-12-01 | 重庆大学 | Parameter voltage variation induction motor and control device thereof |
| CN2369399Y (en) * | 1999-04-15 | 2000-03-15 | 黄士鹏 | Inductive motor with high starting torque |
| CN2437072Y (en) * | 2000-01-21 | 2001-06-27 | 陈天为 | Double-power high-efficiency energy-saving motor |
| CN2432720Y (en) * | 2000-05-09 | 2001-05-30 | 李伟力 | Special-purpose high starting torque energy-saving motor for pumping unit with intelligent controlling equipment |
| CN101447720A (en) * | 2008-12-15 | 2009-06-03 | 南阳华大博元高科技研发中心 | Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor |
Non-Patent Citations (1)
| Title |
|---|
| 王雪帆，许实章.无环流3Y／3Y连接换相变极绕组对称并联条件研究.《华中理工大学学报》.1995,第23卷123-127. * |
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Owner name: NANYANG EXPLOSION PROTECTION GROUP XINPU ELECTRIC Free format text: FORMER NAME: NANYANG EXPLOSION PROTECTION GROUP XINPU ELECTRIC MOTOR CO., LTD.;HUAZHONG UNIVERSITY OF SCIENCE + T |
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Address after: 473008 hi tech Zone, Henan, Nanyang Patentee after: Nanyang Explosion Protection Group Xinpu Electric Motor Co., Ltd. Patentee after: Huazhong University of Science and Technology Address before: 473008 hi tech Zone, Henan, Nanyang Patentee before: Nanyang Explosion Protection Group Xinpu Motor Co., Ltd. Patentee before: Huazhong University of Science and Technology |
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Granted publication date: 20120215 Termination date: 20180901 |