CN101447720A - Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor - Google Patents
Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor Download PDFInfo
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- CN101447720A CN101447720A CNA2008102313575A CN200810231357A CN101447720A CN 101447720 A CN101447720 A CN 101447720A CN A2008102313575 A CNA2008102313575 A CN A2008102313575A CN 200810231357 A CN200810231357 A CN 200810231357A CN 101447720 A CN101447720 A CN 101447720A
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Abstract
The invention discloses a novel tri-power, efficient, energy-saving three-phase asynchronous motor used for an oil extractor, which comprises a rotor and a stator winding; the stator winding adopts the unique 3Y composite series connection method and the novel technology of turn removal; the stator winding corresponds to a low power grade, a medium power grade and a high power grade, and the number of turns of serial coils in each phase reduces with the power grade, with the low grade power corresponding to a maximum number of turns and the high grade power corresponding to a minimum number of turns; and the switch among the three power grades is achieved by three contactors. As the invention has the high, the medium and the low power grades which are all available for option, and the high power grade has a high start-up torque and is applied to starting the oil extractor, the motor can automatically operate at the low or medium power grade on the completion of the start-up process, and can realize two-way automatic switch of operating power according to the change in the working condition of an oil well. As the motor has the advantages of great start-up torque, high operating efficiency and power factor, convenient control, good reliability and remarkably reduced no load current, the motor can achieve better energy-saving effect.
Description
Technical field
The invention belongs to the motor technology field, particularly a kind of used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor.
Background technology
Beam pumping unit is to use the most general mechanical device in the China's oil exploitation.The load properties of its dragging motor is that requirement has very big starting torque, and actual motion load torque and little.For adapting to such load, generally requiring starting torque during the apolegamy motor is more than 3 to 4 times of actual loading torque.In addition, the duty cycle property fluctuation during the pumping-unit motor operation, motor loads during lifting, and from the electrical network absorbed power, motor then is a underloading when descending, even may work in generating state, sends electric energy to electrical network.So just caused two problems that exist in the reality: the one, motor actual loading rate is little, and efficient and power factor descend, the serious waste electric energy; The 2nd, running load fluctuation causing system loss increases.
For addressing the above problem, a lot of technical schemes were once proposed both at home and abroad, for example, high slip motor, magneto, two stator motor, pole-changing motor also have the thyristor of employing to downgrade and press operation, variable frequency power supply, reactive power compensator and motor stator winding to adopt Y-Δ connection etc.Y-Δ connection conversion winding is more advanced, but it has only two power shelves, and the changing-over complexity, and these two shelves power ratio are confined to fixed numbers
, can not adjust, also just can't guarantee certainly motor is moved by optimum Working.Generally speaking, these technical schemes or improvement in performance are little, or the cost height, or control transformation complexity, poor reliability, can not really satisfy the needs in China oil field, in fact also are difficult to apply.
Summary of the invention
It is big to the invention provides a kind of starting torque, operational efficiency and power factor height, and control is convenient, good reliability, no-load current significantly descends, the used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor of good energy-conserving effect.
A kind of used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor comprises rotor, stator winding, described stator winding adopts compound series connection 3Y connection and goes the circle technology, corresponding basic, normal, high three the power shelves of the stator winding coil turn that whenever is in series reduces gradually, the corresponding number of turn at most of low-grade power, the corresponding minimum number of turn of high-grade power, the conversion between described three power is finished by three contactors.
The described circle technology of going is to reduce the number of turn that is in series, and the winding that remaining coil is constituted has still kept and 60 ° of close superperformances of facies tract winding of standard.
Because used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor of the present invention has adopted the compound winding new technology of original creation, has selectable high, medium and low three kinds of power shelves, wherein the high power shelves have high starting torque, are used for the startup of oil pumper; Starting process finishes and promptly changes low-power shelves or the operation of middle power shelves automatically over to, and can change the two-way automatic switchover that realizes operate power according to oil well condition, this motor can mate the pump load system well, compare with other improvement technical schemes of research promotion in the present oil pumper dragging system, starting torque is big, operational efficiency and power factor height, control is convenient, good reliability, no-load current significantly descends, thereby has better energy-saving effect.Product is compared with former YQCH energy-saving electric machine through the energy-conservation measuring station assessment test of Henan Oil Field branch company of China Petrochemical Industry, and power saving rate has improved 31.15%, and load factor improves 25.95 percentage points, and power factor improves nearly 0.2; Compare with former Y common electric machine, meritorious power saving rate reaches 35%, and idle power saving rate reaches 60.8%, integrated power-saving rate 41.9%, power savings highly significant.YCS used for oil extractor novel tri-power, efficient, energy-saving motor mainly is at the timely varying load operation characteristic of the heavy load starting of oil pumper, utilize winding new theory and " removing circle " new technology, use time-vector method and computer harmonic analysis method, guaranteed that winding not only has characteristics separately but also have good performance to three power shelves, can satisfy the operating mode demand of oil pumper fully.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Fig. 1 is the structural representation of stator winding wiring of the present invention;
Fig. 2 is the schematic diagram that low-power shelves Y type of the present invention connects;
Fig. 3 is the schematic diagram that power shelves Y type connects among the present invention;
Fig. 4 is the schematic diagram that high power shelves Y type of the present invention connects;
Fig. 5 is that embodiment of the invention groove is counted Z=72, the stator winding slot-number phase graph of number of poles p=4;
Fig. 6 is the three-phase groove number of 60 ° of facies tract windings of standard, i.e. low-power shelves stator winding schematic diagram;
Fig. 7 is that embodiment of the invention groove is counted Z=72, and the stator winding of number of poles p=4 is every to remove the three-phase groove distribution map of 4 grooves number mutually, promptly in power shelves stator winding schematic diagram;
Fig. 8 is that embodiment of the invention groove is counted Z=72, and the stator winding of number of poles p=4 is every to remove the three-phase groove distribution map of 8 grooves number, i.e. high power shelves stator winding schematic diagram mutually;
Fig. 9 is that groove is counted Z=72, number of poles 2p=8, and y=8 three phase winding the harmonics of magnetic force are analyzed schematic diagram.
Embodiment
Shown in Fig. 1,2,3,4, a kind of used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor comprises rotor, stator winding, described stator winding adopts compound series connection 3Y connection and goes the circle technology, corresponding basic, normal, high three the power shelves of the stator winding coil turn that whenever is in series reduces gradually, the corresponding number of turn at most of low-grade power, the corresponding minimum number of turn of high-grade power, the conversion between described three power is finished by three contactors.
The described circle technology of going is to reduce the number of turn that is in series, and the winding that remaining coil is constituted has still kept and 60 ° of close superperformances of facies tract winding of standard.
Used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor New-type electric machine three-phase stator winding of the present invention adopts the series connection 3Y mode of connection, have high, medium and low three power grades, three power shelves are the Y connection, adopt three contactors can easyly carry out changing-over reliably, the winding coil number of turn of adjusting between each grade then can obtain each grade power division ratio easily, be that each grade actual power can design as required, thereby make motor load operate in optimum Working.
The new series connection 3Y mode of connection is suitable for adopting " removing circle " new technology to make the new designing concept of capacity motor increase in the motor stator winding design, promptly pressing capacity motor distributes, the motor windings of corresponding from low to high three the power shelves number of turn that whenever is in series reduces gradually, the corresponding number of turn at most of low-grade power, the corresponding minimum number of turn of high-grade power also makes to possess the simplest also the most reliable conversion regime between each power shelves.
Embodiment one
Embodiment is with pumping-unit motor number of poles 2p=8 commonly used, and three phase windings that groove is counted Z=72 are that example specifies.Shown in Fig. 5,6,7,8, shown in Figure 5 is number of poles 2p=8, and groove is counted the Z=72 slot-number phase graph.Figure 6 shows that the three-phase groove coil allocative decision of 60 ° of facies tract windings of standard, the low-power shelves of this corresponding motor of the present invention; On the basis of this scheme, according to pump load operating mode characteristics, select every 4 grooves number of removing mutually, obtain as shown in Figure 7 power shelves winding scheme in the correspondence, further, select every 8 grooves number of removing mutually again, obtain corresponding as shown in Figure 8 high-power winding scheme.
For Fig. 5,6,7,8 winding scheme, Fig. 9 has listed the harmonic analysis result who analyzes number of poles Z-p of wherein high, medium and low power shelves winding scheme.From Fig. 9 harmonic analysis result as can be seen, when line taking circle pitch y=8, Fig. 7 and middle power shelves shown in Figure 8 and two winding schemes of high power shelves, for 8 utmost point first-harmonics, winding coefficient is higher, be respectively 0.9373 and 0.9254, compare with 60 ° of facies tract winding coefficients 0.9452 of standard, very approaching, and magnetic potential counter-rotating component is 0, three phase winding symmetries this moment are described, and have kept higher conductor utilance.
In addition, consider that the high power shelves are used for finishing the starting process of oil pumper more, therefore also must limit the just commentaries on classics high order harmonic component amplitude that turns to together with 8 utmost point first-harmonics.Harmonic analysis is the result show, presses the high power shelves and the middle power shelves scheme of Fig. 8 and groove shown in Figure 7 number distribution, and the relative amplitude that high order is just changeing harmonic wave is respectively 3.4290% (32 utmost point) and 4.0446% (56 utmost point), all is no more than 5%.Therefore, according to such wave analysis result, and judge according to winding performance general standard, every phase winding of suitable " removing circle " technology is after having lost some coils as can be known, the corresponding winding of high power shelves and middle power shelves has still kept and 60 ° of close superperformances of facies tract winding of standard, can satisfy application requirements.
Because used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor of the present invention has adopted the compound winding new theory new technology of original creation, have selectable high, medium and low three kinds of power shelves, wherein the high power shelves have high starting torque, are used for the startup of oil pumper; Starting process finishes and promptly changes low-power shelves or the operation of middle power shelves automatically over to, and can change the two-way automatic switchover that realizes operate power according to oil well condition, this motor can mate the pump load system well, compare with other improvement technical schemes of research promotion in the present oil pumper dragging system, starting torque is big, operational efficiency and power factor height, control is convenient, good reliability, no-load current significantly descends, thereby has better energy-saving effect.Product is compared with former YQCH energy-saving electric machine through the energy-conservation measuring station assessment test of Henan Oil Field branch company of China Petrochemical Industry, and power saving rate has improved 31.15%, and load factor improves 25.95 percentage points, and it is nearly 0.2 that power factor improves, the power savings highly significant.YCS used for oil extractor novel tri-power, efficient, energy-saving motor mainly is at the timely varying load operation characteristic of the heavy load starting of oil pumper, utilize winding new theory and " removing circle " new technology, use time-vector method and computer harmonic analysis method, guaranteed that winding not only has characteristics separately but also have good performance to three power shelves, can satisfy the operating mode demand of oil pumper fully.
According to statistics, domestic oil field now has more than 100,000 mouthful of oil well, reaching more than 100,000 with the oil pumping motor recoverable amount, the installation total capacity exceedes 3,500,000 kilowatts, year, power consumption was above 10,000,000,000 kilowatt hours, total electricity charge reach about 7,700,000,000 yuan, account for about 25% of field produces cost, account for about 80% of oil field electricity charge total expenditure; By normal conditions, about 8000～10000 of annual renewal motor, and mostly be common poor efficiency motor.If all adopt YCS series novel tri-power, efficient, energy-saving motor, so, can economize on electricity every year about 3,500,000,000 kilowatt hours, save about 2,500,000,000 yuan of the electricity charge, simultaneously can also significantly reduce solid waste and greenhouse gas emission, have very huge economic benefit, social benefit and environmental benefit.
Claims (2)
1. used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor, comprise rotor, stator winding, it is characterized in that: described stator winding adopts compound series connection 3Y connection and goes the circle technology, corresponding basic, normal, high three the power shelves of the stator winding coil turn that whenever is in series reduces gradually, the corresponding number of turn at most of low-grade power, the corresponding minimum number of turn of high-grade power, the conversion between described three power is finished by three contactors.
2. used for oil extractor novel tri-power, efficient, energy-saving three-phase asynchronous motor as claimed in claim 1, it is characterized in that: the described circle technology of going is to reduce the number of turn that is in series, and the winding that remaining coil is constituted has still kept and 60 ° of close superperformances of facies tract winding of standard.
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| CNA2008102313575A CN101447720A (en) | 2008-12-15 | 2008-12-15 | Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor |
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| CNA2008102313575A CN101447720A (en) | 2008-12-15 | 2008-12-15 | Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814812A (en) * | 2010-04-13 | 2010-08-25 | 景德镇市景德电机有限公司 | Double-speed four-power energy-saving three-phase asynchronous motor |
| CN102158030A (en) * | 2011-04-07 | 2011-08-17 | 南阳高特电机有限公司 | Multiwinding series connection variable volume induction motor and control device thereof |
| CN101692593B (en) * | 2009-09-01 | 2012-02-15 | 南阳防爆集团新普电机有限公司 | Dual-power induction motor for conveyor |
| CN103427573A (en) * | 2013-08-26 | 2013-12-04 | 西安正麒电气有限公司 | Connection method of three multi-path triangular connection lead wires of three-phase asynchronous motor |
| CN106685305A (en) * | 2017-03-17 | 2017-05-17 | 江西优特汽车技术有限公司 | Three-mode motor and control method thereof |
-
2008
- 2008-12-15 CN CNA2008102313575A patent/CN101447720A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692593B (en) * | 2009-09-01 | 2012-02-15 | 南阳防爆集团新普电机有限公司 | Dual-power induction motor for conveyor |
| CN101814812A (en) * | 2010-04-13 | 2010-08-25 | 景德镇市景德电机有限公司 | Double-speed four-power energy-saving three-phase asynchronous motor |
| CN101814812B (en) * | 2010-04-13 | 2011-11-02 | 景德镇市景德电机有限公司 | Double-speed four-power energy-saving three-phase asynchronous motor |
| CN102158030A (en) * | 2011-04-07 | 2011-08-17 | 南阳高特电机有限公司 | Multiwinding series connection variable volume induction motor and control device thereof |
| CN103427573A (en) * | 2013-08-26 | 2013-12-04 | 西安正麒电气有限公司 | Connection method of three multi-path triangular connection lead wires of three-phase asynchronous motor |
| CN103427573B (en) * | 2013-08-26 | 2016-06-22 | 西安正麒电气有限公司 | The mode of connection of threephase asynchronous multichannel triangle joint three lead-in wire |
| CN106685305A (en) * | 2017-03-17 | 2017-05-17 | 江西优特汽车技术有限公司 | Three-mode motor and control method thereof |
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Open date: 20090603 |