CN1082740C - Connecting method for changing single star-triangle into double star-triangle in ac motor winding - Google Patents
Connecting method for changing single star-triangle into double star-triangle in ac motor winding Download PDFInfo
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- CN1082740C CN1082740C CN 94118598 CN94118598A CN1082740C CN 1082740 C CN1082740 C CN 1082740C CN 94118598 CN94118598 CN 94118598 CN 94118598 A CN94118598 A CN 94118598A CN 1082740 C CN1082740 C CN 1082740C
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Abstract
本发明可用于变极、起动、调速的交流电机绕组联结法及结构。可以为单星-三角和双星-三角两种方式联结。当为单星-三角联结时，得到极数P的旋转磁场，有三个引出端接电网；当为双星-三角联结时，得到极数Q的旋转磁场，有六个引出端接电网。本发明所说的联结绕组，用于谐波起动的感应电动机时，有着很低的起动电流；用于变极、调速时，可做到不断电切换，以避免由断电切换造成的电磁拖动转矩瞬间消失或再次通电造成的冲击电流。
The invention can be used for the connection method and structure of the AC motor windings for pole changing, starting and speed regulation. It can be connected in two ways: single star-delta and double star-delta. When it is a single star-delta connection, the rotating magnetic field with the number of poles P is obtained, and three leads are connected to the power grid; when it is a double star-delta connection, the rotating magnetic field with the number of poles Q is obtained, and there are six leads connected to the power grid. The connection winding mentioned in the present invention has a very low starting current when it is used for induction motors starting with harmonics; when it is used for pole changing and speed regulation, it can achieve continuous power switching to avoid electromagnetic damage caused by power-off switching. Inrush current caused by momentary loss of drag torque or re-energization.
Description
The invention belongs to AC Electrical Machine Winding connecting method and structure.
Present pole changing induction motor adopts the mode of single-winding pole-changing mostly, changes the number of poles that winding connection method changes winding by the switch changing-over.Variable-pole winding commonly used generally has 6 lead-out wires, and its mode of connection then is generally 2Y/ △ and 2Y/Y and 3Y/3Y etc.Conventional mode of connection can satisfy normally that generally speaking pole-changing requires, but conventional connection pole-changing, the variable-pole winding deenergization that need will under a kind of number of poles, work earlier by switching device, be changed to another kind of number of poles after, again winding is dropped into power supply again.Because traditional variable-pole winding connection is necessary deenergization when pole-changing, such pole-changing motor carries out the pole-changing switching under at operating condition, motor will occur and drag torque pop-off and the excessive phenomenon of pole-changing impulse current, thereby make the application of pole-changing motor be subjected to certain limitation.
The objective of the invention is to propose a kind of new variable-pole winding connection.The pole-changing induction motor that adopts the variable-pole winding of this new arrangement method to make, the same with conventional variable-pole winding have only 6 lead-out wires, but wherein 3 lead-out wires are at the pole-changing motor power supply that often gets access to grid in service, and other 3 lead-out wires be when motor need carry out pole-changing, speed governing or starting, close or disconnect from electric network source.Because new connection can guarantee pole-changing motor deenergization not all the time under pole-changing switchover operation operating mode, thus can solve effectively that the pole-changing motor that adopts traditional variable-pole winding occurs when pole-changing drag torque pop-off and the excessive problem of pole-changing impulse current.
Basic comprising method of the present invention is as follows.
1. winding division methods
With number of poles is three phase alternating current motor A, the B of P, the winding of 120 ° of electrical degree symmetries of C three-phase mutual deviation, every two parts that are labeled as Y and △ that are divided into mutually, wherein every phase of Y part winding is further divided into 2 segments again, and every segment all has two exits of initial and end, three-phase is totally 6 segments, is designated as A respectively
Y1, A
Y2, B
Y1, B
Y2, C
Y1, C
Y2(A here
Y1Implication be A phase Y part first segment, all the other symbol implications can be analogized, and are as follows), the contained coil number of every segment be m (m=0,1,2 ...); Every phase of △ part winding also is further divided into 2 segments, and every segment also all has two exits of initial and end, and three-phase is totally 6 segments, is designated as A respectively
Δ 1, A
Δ 2, B
Δ 1, B
Δ 2, C
Δ 1, C
Δ 2, the contained coil number of every segment be n (n=1,2,3 ...).
2. winding connection method
Earlier with 6 segment windings of above-mentioned △ part A in order
Δ 1, B
Δ 2, C
Δ 1, A
Δ 2, B
Δ 1, C
Δ 2Head and the tail link, and become a three-phase △ shape closed circuit with 6 nodes.And then with an exit of each segment in the 6 segment windings of Y part, from A
Δ 1The head end node begins, in order A
Y1, B
Y2, C
Y1, A
Y2, B
Y1, C
Y2Connect mutually with 6 nodes that above-mentioned three-phase △ shape connects respectively successively.6 other exits of 6 segment windings of Y part are labeled as D1, D2, D3, D4, D5, D6 respectively, as shown in Figure 1, and as the external leading-out end line of whole winding.
3. pole-changing changing-over method
Three phase windings of connection are (for ease of observing and explanation as shown in Figure 1, accompanying drawing 1 changed be depicted as accompanying drawing 2a), exit D1, D3, D5 are inserted the three phase network power supply, and exit D2, D4, D6 are unsettled, the number of poles that three phase windings will present is Q, still insert as exit D1, D3, D5 under the situation of three phase network power supply, again with exit D4, D6, D2 respectively with exit D1, D3, D5 are connected, promptly also drop into the three phase network power supply, as shown in Figure 2, at this moment the original number of poles Q that presents of three phase windings disappears, and presents number of poles P.
Basic principle of the present invention is described as follows.
Three phase windings of connection shown in the accompanying drawing 2, its every segment winding all is designed to produce simultaneously the magnetic potential of P and two kinds of numbers of poles of Q, but, when its 6 exit D1 and D4, D3 and D6, D5 and D2 parallel connection insert the three phase network power supply together, 2 segments that every phase winding Y and △ two parts are contained separately, for example A of A phase
Y1, A
Y2Or A
Δ 1, A
Δ 2The magnetic potential of Chan Shenging is a homophase for number of poles P respectively, and is anti-phase for number of poles Q, and number of poles Q will be eliminated fully like this, at this moment three phase windings can regard every connect in parallel that the double star serial triangle of two branch roads in parallel is arranged mutually as, will only produce the rotating magnetic field that number of poles is P; And as exit D1, D3, D5 inserts the three phase network power supply, exit D2, D4, when D6 disconnects from the three phase network power supply, at this moment three phase windings become single star serial triangle connection of having only a branch road mutually for every, wherein to 2 contained segments of every phase winding Y part, only insert one section, another section is then unsettled, to 2 contained segments of every phase winding △ part, the magnetic potential that is produced is for number of poles P, phase difference is 120 ° of electrical degrees, for number of poles Q then is 60 ° of electrical degrees, because it is big and less to number of poles Q phase difference to number of poles P phase difference, number of poles Q magnetic potential will be stronger like this, and number of poles P magnetic potential then will greatly be weakened, and the rotating magnetic potential of three phase windings mainly is rendered as number of poles Q.
The present invention can be used for the induction motor of harmonic starting, and at this moment motor will have very low starting current.The pole-changing induction motor that continuous TURP changes when also being suitable for wishing pole changing can be avoided like this because the outage pole-changing switches the excessive secondary pulse electric current that the electromagnetism that causes drags the torque pop-off or switches on and cause once more.Also be fit to the normal at a high speed again operation of first low speed starting, or carry out the occasion that continuous TURP changes the low speed plug braking during normal at a high speed operation.
The attached method of accompanying drawing 1:12 segment winding;
Accompanying drawing 2: the three-phase P/Q pole-changing changing-over winding connection method of not cutting off the power supply;
A) attached method of 12 segment windings;
A when b) the winding number of pole-pairs is P, b, the connection method that the c three phase mains inserts;
A when c) the winding number of pole-pairs is Q, b, the connection method that the c three phase mains inserts.
Be instantiation of the present invention below.
Groove is counted Z=72, and pole-changing compares P/Q=6/8.
When this example press three phase windings shown in the accompanying drawing 2 and do to be connect, its each segment groove that winding is connected number following (during by the series connection of the diagram direction of arrow, number expression of positive groove is along connecing series coil, bears groove and number represents the reversal connection series coil).A
Y1：-65，-66，55，56，57，-46； A
Y2：29，30，-19，-20，-21，10；B
Y1：61，62，63，-52，-53，-54； B
Y2：-25，-26，-27，16，17，18；C
Y1：69，-58，-59，-60，49，50； C
Y2：-33，22，23，24，-13，-14；A
Δ1：-15，4，5，6，-67，-68； A
Δ2：51，-40，-41，-42，31，32；B
Δ1：11，12，-1，-2，-3，64； B
Δ2：-47，-48，37，38，39，-28；C
Δ1：-7，-8，-9，70，71，72； C
Δ2：43，44，45，-34，-35，-36。
Claims (5)
1. a single star-triangle that is used for pole-changing, starting, speed governing becomes the three phase alternating current motor winding of double star-triangle, contain two parts that are labeled as Y and △, every 2 segments that are divided into mutually of Y part winding wherein, every segment all has two exits of initial and end, the contained coil number of every segment m (m=0,1,2 ...); Every phase of △ part winding also is divided into 2 segments, every segment also all has head, two exits of tail, the contained coil number of every segment is n (n=1,2,3,) Y and △ two parts respectively contain 6 segments, contain 12 segments altogether, its connecting method is: wherein 6 segment windings of △ part join end to end to connect by three phase sequences and become a three-phase △ shape closed circuit with 6 nodes, and then with an exit of each segment in the Y part 6 segment windings, also connect mutually with 6 nodes that above-mentioned three-phase △ shape connects respectively successively by three phase sequences, 6 exits that Y part 6 segment windings are other, be labeled as D1 in order respectively, D2, D3, D4, D5, D6, promptly as the external exit of whole three-phase winding, as exit D1, D3, D6 inserts the three phase network power supply, other three exit D2, D4, when D6 is unsettled, obtaining its number of poles is the winding of single star-triangle connection of Q, and as exit D1 and D4, D3 and D6, drop into the three phase network power supply after D5 and D2 are bound up respectively, then obtain the winding that another kind of number of poles is double star-triangular configuration of P.
2. press the described motor windings connecting method of claim 1 for one kind, it is characterized in that the contained coil number of Y part is m=0, at this moment variable-pole winding becomes single △ tandem-type connection and becomes two △ parallel connection methods, and the corresponding number of poles of wherein two △ parallel connection methods is P, and the corresponding number of poles of single △ tandem-type connection is Q.
3. a single star-triangle that is used for pole-changing, starting, speed governing becomes the three phase alternating current motor winding of double star-triangle, it is characterized in that containing two parts that are labeled as Y and △, every 2 segments that are divided into mutually of Y part winding wherein, every segment all has two exits of initial and end, the contained coil number of every segment m (m=0,1,2 ...); Every phase of △ part winding also is divided into 2 segments, and every segment also all has two exits of initial and end, the contained coil number of every segment be n (n=1,2,3 ...); Y and △ two parts respectively contain 6 segments, contain 12 segments altogether, 6 segment windings of the part of △ are wherein joined end to end by three phase sequences and connect and become a three-phase △ shape closed circuit with 6 nodes, and then with an exit of each segment in the Y part 6 segment windings, also connect mutually with 6 nodes that above-mentioned three-phase △ shape connects respectively successively by three phase sequences, 6 exits that Y part 6 segment windings are other, be labeled as D1 in order respectively, D2, D3, D4, D5, D6, promptly as the external exit of whole three-phase winding, as exit D1, D3, D6 inserts the three phase network power supply, other three exit D2, D4, when D6 is unsettled, obtaining its number of poles is the winding of single star-triangle connection of Q, and as exit D1 and D4, D3 and D6, drop into the three phase network power supply after D5 and D2 are bound up respectively, then obtain the winding that another kind of number of poles is double star-triangular configuration of P.
4. press the described motor windings connecting method of claim 3 for one kind, it is characterized in that the contained coil number of Y part is m=0, at this moment variable-pole winding becomes single △ tandem-type connection and becomes two △ parallel connection methods, and the corresponding number of poles of wherein two △ parallel connection methods is P, and the corresponding number of poles of single △ tandem-type connection is Q.
5. press the described motor windings scheme of claim 3 for one kind, this scheme is that the groove number is Z=72, and pole-changing is than being the P/Q=6/8 two layer winding.It is characterized in that A, B, C three-phase groove number are allocated as follows: A in Y and △ two parts
Y1:-65 ,-66,55,56,57 ,-46; A
Y2: 29,30 ,-19 ,-20 ,-21,10; B
Y1: 61,62,63 ,-52 ,-53 ,-54; B
Y2:-25 ,-26 ,-27,16,17,18; C
Y1: 69 ,-58 ,-59 ,-60,49,50; C
Y2:-33,22,23,24 ,-13 ,-14; A
Δ 1:-15,4,5,6 ,-67 ,-68; A
Δ 2: 51 ,-40 ,-41 ,-42,31,32; B
Δ 1: 11,12 ,-1 ,-2 ,-3,64; B
Δ 2:-47 ,-48,37,38,39 ,-28; C
Δ 1:-7 ,-8 ,-9,70,71,72; C
Δ 2: 43,44,45 ,-34 ,-35 ,-36.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94118598 CN1082740C (en) | 1994-12-08 | 1994-12-08 | Connecting method for changing single star-triangle into double star-triangle in ac motor winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94118598 CN1082740C (en) | 1994-12-08 | 1994-12-08 | Connecting method for changing single star-triangle into double star-triangle in ac motor winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1124421A CN1124421A (en) | 1996-06-12 |
| CN1082740C true CN1082740C (en) | 2002-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94118598 Expired - Fee Related CN1082740C (en) | 1994-12-08 | 1994-12-08 | Connecting method for changing single star-triangle into double star-triangle in ac motor winding |
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| Country | Link |
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| WO2018213919A1 (en) * | 2017-05-23 | 2018-11-29 | Dpm Technologies Inc. | Variable coil configuration system control, apparatus and method |
| US11708005B2 (en) | 2021-05-04 | 2023-07-25 | Exro Technologies Inc. | Systems and methods for individual control of a plurality of battery cells |
| US11722026B2 (en) | 2019-04-23 | 2023-08-08 | Dpm Technologies Inc. | Fault tolerant rotating electric machine |
| US11967913B2 (en) | 2021-05-13 | 2024-04-23 | Exro Technologies Inc. | Method and apparatus to drive coils of a multiphase electric machine |
| US12176836B2 (en) | 2018-09-05 | 2024-12-24 | Dpm Technologies Inc. | Systems and methods for intelligent energy storage and provisioning using an energy storage control system |
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| CN102290940B (en) * | 2010-06-18 | 2015-08-19 | 艾默生电气公司 | The 3T-Y winding switching of three-phase multiple-speed motor |
| WO2023164865A1 (en) * | 2022-03-03 | 2023-09-07 | 罗灿 | Three-phase yoke winding pole changeable stator |
-
1994
- 1994-12-08 CN CN 94118598 patent/CN1082740C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018213919A1 (en) * | 2017-05-23 | 2018-11-29 | Dpm Technologies Inc. | Variable coil configuration system control, apparatus and method |
| US11081996B2 (en) | 2017-05-23 | 2021-08-03 | Dpm Technologies Inc. | Variable coil configuration system control, apparatus and method |
| US12176836B2 (en) | 2018-09-05 | 2024-12-24 | Dpm Technologies Inc. | Systems and methods for intelligent energy storage and provisioning using an energy storage control system |
| US11722026B2 (en) | 2019-04-23 | 2023-08-08 | Dpm Technologies Inc. | Fault tolerant rotating electric machine |
| US11708005B2 (en) | 2021-05-04 | 2023-07-25 | Exro Technologies Inc. | Systems and methods for individual control of a plurality of battery cells |
| US11967913B2 (en) | 2021-05-13 | 2024-04-23 | Exro Technologies Inc. | Method and apparatus to drive coils of a multiphase electric machine |
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| Publication number | Publication date |
|---|---|
| CN1124421A (en) | 1996-06-12 |
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