CN2357431Y - Winding-type induction motor using rotor multi-loop self-closed symmetrical structure - Google Patents
Winding-type induction motor using rotor multi-loop self-closed symmetrical structure Download PDFInfo
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- CN2357431Y CN2357431Y CN 99232685 CN99232685U CN2357431Y CN 2357431 Y CN2357431 Y CN 2357431Y CN 99232685 CN99232685 CN 99232685 CN 99232685 U CN99232685 U CN 99232685U CN 2357431 Y CN2357431 Y CN 2357431Y
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Abstract
The utility model relates to a stator winding group for a line winding sensing motor and is provided with a starting pole 2Q and a running pole 2P. The stator winding group for a line winding sensing motor is characterized in that winding group elements of every row of groove numbers in a rotor three phase groove number phase map under the running pole 2P are in sequence connected in series into a closed return circuit to form multiple closed return circuits under the pole. Every two closed return circuits are in one group to form the structure becoming a passage to the current under the starting pole 2Q in the matching way. The matching connection is the symmetrical connection of multiple connecting lines at the end part of the corresponding closed return circuit. Therefore, the stator winding group for a line winding sensing motor cancels a traditional sliding ring-electric brush system and has good starting performance. The stator winding group for a line winding sensing motor has the advantages of simple structure, low cost, convenient maintenance and good reliability.
Description
The utility model relates to Wound induction motor, further is meant the brushless winding-type induction motor that adopts rotor multiloop self-closing symmetrical structure and have good starting performance.
On the armature spindle of traditional wound rotor induction motor slip ring is housed, can seal in or excise starting resistance in rotor circuit by brush increases starting torque and reduces starting current, accomplish high-efficiency operation, thus extensive in the applications that requires heavy-load start.But this motor is also because of existing slip electric contact complex structure, maintenance inconvenience, reliability lower, the occasion of the inflammable and explosive many dirt of incompatibility, and its application is very limited again.Cancel described slip ring-brush-system, in theory still all significant for Wound induction motor to engineering reality, thereby become the problem that the motor specialty is widely studied for a long time always.For example, the technical scheme of CN85102382 patent documentation record becomes operation utmost point 2P and two kinds of numbers of poles of starting utmost point 2Q with the motor stator design of Windings; The rotor winding is made as, and the rotor current of starting pole field induction must be through directly being connected on the starting resistance on the rotor winding, and to improve its starting performance, the rotor current of operation pole field induction is then without this starting resistance, to guarantee runnability.By the harmonic starting wound rotor induction motor of this method design, owing to cancelled slip ring-brush-system, its above-mentioned inherent shortcoming is eliminated thereupon.But the shortcoming of this harmonic starting motor is, the starting resistance that seals on the rotor immobilizes, unlike traditional wound-rotor motor, in starting process, excised step by step, do not accomplish that the more such automatic smoothing of the numerous rheostat of picture frequency reduces, thereby can't guarantee that higher starting torque is all arranged in whole starting process.
The purpose of this utility model is, design the Wound induction motor that adopts rotor multiloop self-closing symmetrical structure, cancel slip ring-brush-system and have good starting performance, thereby overcome the above-mentioned deficiency of prior art, product applications expansion, cost are reduced.
The technical solution of the utility model is, the Wound induction motor of described employing rotor multiloop self-closing symmetrical structure comprises shell, stator, rotor, stator winding has starting utmost point 2Q and operation utmost point 2P, its design feature is, the structure of rotor wave winding is, each element of winding that is listed as each groove number is contacted successively and is become a closed-loop path and form many closed-loop paths under the operation extremely in the rotor three-phase slot-number phase graph when moving 2P very, and with described closed-loop path when to be an assembly to connection make it become starting utmost point 2Q with per two electric current also constitute the structure of path, described pairing connects and is meant the element of winding end in respective closed loop is formed a plurality of closed-loop paths with the connection of many lines symmetries.
Below in conjunction with accompanying drawing structure of the present utility model and design principle are made and to be further specified.
Count Z=36 for a rotor, the motor of number of poles 2P=4, every extremely every phase groove of its rotor winding is counted q=Z/6P=3, and number distribution of the three-phase groove in the time of can drawing 4 utmost points is as shown in Figure 1.By it as can be known, three phase windings are every to be divided into two half-phases mutually, has 6 half-phases like this among Fig. 1.For common wave winding, it connects rule and is, winding is along the rotor surface q circle that detours, with each belong to extremely down same mutually just the coil (for example A+ among Fig. 1) of facies tract connect in certain sequence and constitute half of phase winding; And then along detour q circle of rotor surface.Each coil (for example A-among Fig. 1) that belongs to same negative band extremely down is together in series in certain sequence and constitute phase winding second half, as shown in Figure 2.Can connect between these two halves, also can be in parallel, decide on needed way.The utility model adopts the connection of multiloop wave winding then different with above-mentioned method of attachment.According to connected mode described in the utility model, each row in the phase diagram shown in Figure 1 are connected into a closed-loop path, such 18 row just have 18 closed-loop paths, and as shown in Figure 3, promptly whenever detouring along rotor surface constitutes a closed-loop path once enclosing.
The comparison diagram 2 and the mode of connection shown in Figure 3, and contrast phase diagram shown in Figure 1, these two kinds of pair of connecting wires 4 utmost points are equivalent as can be known, and the winding coefficient of Fig. 3 wiring at this moment is also a little more than common connection.But it should be noted that Fig. 3 pair of connecting wires 4 utmost points are closed short-circuited windings, can not resemble in the rotor circuit and seal in additional resistance the common connection and improve starting performance, must select for use the number of poles except that 4 utmost points to improve starting performance.Fig. 4 is 36 grooves, 6 utmost point slot-number phase graphs, 4 utmost point three-phases shown in Figure 1 (6 half-phases) groove number is rearranged by 6 utmost point phase places, as shown in Figure 5; As can be seen, for the synchronous groove of 4 utmost points number, 6 utmost point phase places are then differed from 180 °.With reference to phase place shown in Figure 5, aforementioned per two one assembly are pressed to connecting in 18 closed-loop paths shown in Figure 3, it is that the element of winding end of corresponding circuit is connected into a plurality of closed-loop paths with two line symmetries that this pairing connects, and makes it also can constitute path to 6 electrode currents, the concrete connection as shown in Figure 6.
Find out that easily the connection of Fig. 6 is had no effect to 4 utmost point loops, this is because the tie point that increases newly is zero-potential point to 4 utmost point loops, so can not flow through any 4 electrode currents in the connecting line that increases newly; But for 6 utmost points, press Fig. 6 wiring, but have 30 ° phase difference between every pair of newly-increased tie point, thereby at this moment will have electric current to pass through.Can calculate 6 utmost point rotor winding coefficients is COS75 °=0.2588, and rotor electromotive force had been subjected to weakening when this showed 6 utmost points.On the other hand, see over from the stator limit this moment, is equivalent to 6 utmost point rotor resistances and increased 1/ (COS75 °)
2=14.93 times.Obviously,, can reduce starting current greatly, increase starting torque, reach the purpose that improves starting performance if when starting, utilize this characteristics.Therefore, rotor winding connection method of the present utility model is whenever promptly to constitute a closed-loop path around a circle along rotor surface; Per two loops are connected to form a plurality of closed-loop paths with many line symmetries such as (refer to many more than two or two, as three, four, five).For the operation utmost point, these a plurality of closed-loop paths all are symmetrical systems, and current potential is zero between the tie point of loop; For the starting utmost point, there is potential difference between each tie point in described a plurality of closed-loop paths, thereby has electric current to pass through, it weakens rotor electromotive force, is equivalent in starting to increase rotor resistance extremely down, thereby reaches the purpose that increases starting torque, reduces starting current.The application's that Here it is design principle and characteristics place.
As known from the above, the utility model is a kind of Wound induction motor that adopts rotor multiloop self-closing symmetrical structure, by setting up described structure, make motor cancel slip ring-brush-system and have good starting performance, and good reliability, easy to maintenance, product cost is low, be particularly suited for the transformation and the new product development of high-voltage large-capacity induction motor, have wide practical use in industries such as electric power, metallurgy, colliery, building, weavings.
Description of drawings:
Fig. 1 is rotor 36 grooves 4 utmost point three-phases (6 half-phases) groove PHASE DISTRIBUTION figure;
Fig. 2 is the common wave winding A of rotor 36 a grooves phase winding connected mode;
Fig. 3 is the closed wave winding connection layouts of rotor 36 grooves 4 utmost point multiloops;
Fig. 4 is 6 utmost point slot-number phase graphs;
Fig. 5 is that 4 utmost points, 3 phase grooves are number by 6 utmost point phase arrangement figure;
Fig. 6 is the closed wave winding connection layout of 36 grooves, 4/6 utmost point multiloop;
Fig. 7 is rotor 72 grooves 4 utmost point three-phase slot-number phase graphs;
Fig. 8 is rotor 72 grooves 4 utmost point multiloop self-closing wave winding connection layouts;
Fig. 9 is rotor 72 grooves 6 utmost point three-phase slot-number phase graphs;
Figure 10 is rotor 72 grooves 4/6 utmost point multiloop self-closing wave winding connection layouts;
Figure 11 is stator 60 grooves 4/6 winding diagrams;
Figure 12 is the winding connection figure that rotor 72 grooves 6 utmost points move the starting of 4 utmost points;
Figure 13 is the winding connection figure of rotor 72 grooves 8 operations 6 utmost points starting;
Figure 14 is the winding connection figure that rotor 96 grooves 8 utmost points move the starting of 6 utmost points;
Figure 15 is the winding connection figure that rotor 96 grooves 8 utmost points move the starting of 12 utmost points.
The utility model motor of embodiment 1: one YR450-4,6KV, 630KW, the three-phase slot-number phase graph of rotor 72 grooves and 2P=4 as shown in Figure 7, in view of the above the extremely many closed-loop paths of the starting of Zu Chenging as shown in Figure 8, the three-phase slot-number phase graph during its starting utmost point 2Q=6 is as shown in Figure 9; As shown in Figure 9, synchronous groove for 4 utmost points, then 180 ° of phase phasic differences concerning 6 utmost points, according to aforementioned connection of the present utility model, determine that the rotor wave winding connects as shown in figure 10, its phase difference is 30 °, sees over from the stator limit to be equivalent to 14.93 times of 6 utmost point rotor resistances increases, has guaranteed bigger starting torque and lower starting current; The corresponding stator winding connection of utilizing prior art as shown in figure 11.Experimental test shows, the starting current times of this motor is 3.12 times, the standard that is better than 6.5 times of cage electromotors greatly satisfies the standard of GB755-87, starting torque multiple 1.27, efficient 95.5%, power factor (PF) 0.883,68.4 ℃ of temperature rises, the switching shock electric current is less than 1.2 times of rated current, be that index of correlation is good, be improved and improve than common electric machine.In the present embodiment, rotor winding connection method shown in Figure 10 is that per two of the multiloop during with 2P=4 is an assembly to connecting, and it connects for be separated by two loops pairings in a loop of centre, promptly press in the three-phase slot-number phase graph every row and matches connection.
Embodiment 2: winding overhang winding diagram when Figure 12 is the operation of rotor 72 grooves 6 utmost points, the starting of 4 utmost points, it connects for the pairing of every adjacent two loops (being adjacent two row in the three-phase slot-number phase graph), also can be to match with 4 loops (being the 1st row and the 3rd row, the 1st row and the loop of the 4th row in the three-phase slot-number phase graph) and to be connected with 3 or 1 from left to right-1 among the figure, cocircuit and the like.
Embodiment 3: Figure 13 is the operation of rotor 72 grooves 8 utmost points, 6 utmost points starting end winding diagram, and it can also be that the loop 1 that is same as embodiment 2 is connected with 4 pairings with 3 or 1 except the pairing of adjacent two loops connects shown in this figure.
Embodiment 4: end winding diagram when Figure 14 is the operation of rotor 96 grooves 8 utmost points, the starting of 6 utmost points, two loops that its pairing connects can be embodiment 2 described all situations.
Embodiment 5: the end winding diagram when Figure 15 is the operation of rotor 96 grooves 8 utmost points, the starting of 12 utmost points, two loops that its pairing connects can be embodiment 2 described all situations.
By the various embodiments described above and aforementioned structure as can be known, operation utmost point 2P of the present utility model comprises at least with the structure setting of starting utmost point 2Q: 2P=4,6,8, and 2Q=2P+a, and during 2P=4, a=2,4,6; 2P=6,8 o'clock, a=± 2,4,6, and satisfy other all kinds of syndeton of the technical scheme of the utility model, all should belong to the utility model scope.
Claims (4)
1, a kind of Wound induction motor that adopts rotor multiloop self-closing symmetrical structure, comprise shell, stator, rotor, stator winding has starting utmost point 2Q and operation utmost point 2P, it is characterized in that, the structure of rotor wave winding is, each element of winding that is listed as each groove number is contacted successively and is become a closed-loop path and form many closed-loop paths under the operation extremely in the rotor three-phase slot-number phase graph when moving 2P very, and with described closed-loop path with per two be an assembly when making it become to starter 2Q to connection electric current also constitute the structure of path, described pairing connects and is meant the element of winding end in respective closed loop is formed a plurality of closed-loop paths with the connection of many lines symmetries.
2, the Wound induction motor of employing rotor multiloop self-closing symmetrical structure according to claim 1, it is characterized in that, described pairing connects and comprises in the three-phase slot-number phase graph that adjacent two row or the 1st row match with the loop of the 4th row with the 3rd row, the 1st row and be connected that the rest may be inferred for cocircuit.
3, the Wound induction motor of employing rotor multiloop self-closing symmetrical structure according to claim 1 is characterized in that, described 2P=4,6,8, and 2Q=2P+a, and when 2P=4, a=2,4,6; 2P=6,8 o'clock, a=± 2,4,6.
4, the Wound induction motor of employing rotor multiloop self-closing symmetrical structure according to claim 1 is characterized in that, many lines of described usefulness are meant with two or two above lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232685 CN2357431Y (en) | 1999-01-22 | 1999-01-22 | Winding-type induction motor using rotor multi-loop self-closed symmetrical structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232685 CN2357431Y (en) | 1999-01-22 | 1999-01-22 | Winding-type induction motor using rotor multi-loop self-closed symmetrical structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2357431Y true CN2357431Y (en) | 2000-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99232685 Expired - Fee Related CN2357431Y (en) | 1999-01-22 | 1999-01-22 | Winding-type induction motor using rotor multi-loop self-closed symmetrical structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2357431Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110168865A (en) * | 2017-01-23 | 2019-08-23 | 法雷奥电机设备公司 | Wound stator for rotating electric machine |
-
1999
- 1999-01-22 CN CN 99232685 patent/CN2357431Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110168865A (en) * | 2017-01-23 | 2019-08-23 | 法雷奥电机设备公司 | Wound stator for rotating electric machine |
| CN110168865B (en) * | 2017-01-23 | 2022-02-11 | 法雷奥电机设备公司 | Wound stator for rotating electric machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |