CN101001035A - Three-phase contrarotating electric machine and fan - Google Patents
Three-phase contrarotating electric machine and fan Download PDFInfo
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- CN101001035A CN101001035A CN 200610005178 CN200610005178A CN101001035A CN 101001035 A CN101001035 A CN 101001035A CN 200610005178 CN200610005178 CN 200610005178 CN 200610005178 A CN200610005178 A CN 200610005178A CN 101001035 A CN101001035 A CN 101001035A
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Abstract
The invention provides a three-phase counter-rotating motor and a fan, in which, the motor includes a single stator set and a dual-rotor, and the stator set uses a three-phase coil without iron core, and the dual-rotor includes the first and second rotor with different numbers of poles. The ratio of phase coils number for the stator set and poles number for the first and second rotor is 3:4 and 3:2. Through this three-phase driving way, the motor can ensure the counter-rotation normally.
Description
Technical field
The present invention is about a kind of contrarotating motor, especially in regard to a kind of three-phase contrarotating motor and fan with single stator and double-rotor.
Background technology
The motor of conventional axial flow fan is the structure of single stator and single rotor, and is the output that increases blast and air quantity, or for the fault of avoiding fan causes system's operation interrupted, common meeting another spare fans of tandem compound on the script fan.Yet this kind serial fan real for two separately the tube-axial fan of self contained function be cascaded, comparatively complicated and must more manufacturing time and the cost of cost in assembling, the shared volume of the fan behind the tandem compound be also bigger; Still more after the series connection of two separate fan,, and make its blast may not have the effect of addition because may increase each other impedance.
Therefore tradition has a kind of single stator and two-spool electric machine structure of utilizing to be suggested, and as shown in Figure 1, it is a kind of single-phase tool core type motor, mainly comprises a upper strata rotor 11, a middle level stator pack 13 and lower floor's rotor 12.This upper strata rotor 11 and lower floor's rotor 12 embed a plurality of magnet of similar number to form magnetic pole respectively at ring week, this middle level stator pack 13 then has and the electrode of these a plurality of magnet similar numbers, these electrodes are made up of thin folded silicon steel sheet, and its outside is twined by magnetizing coil.In addition, this motor utilizes three Hall subassembly H1, H2, H3 to be converted to voltage signal in order to the magnetic flux of this upper strata rotor 11 of sensing and reaches the purpose of middle level stator pack 13 commutations.
Yet, the electrode of the middle level stator pack 13 of this monophase machine and Hall subassembly H1, H2 thereon, H3 has assembling in practical application difficulty are set.Moreover, this upper strata rotor 11, this middle level stator pack 13 can produce relative suction with this lower floor's rotor 12 and cause a power big by force, so starting resistor is higher, also be not easy to control the size of magnetic declination, so the phenomenon of equidirectional rotation not necessarily can also might take place in reverse direction to changeing with this lower floor's rotor 12 in this upper strata rotor 11.
The present invention promptly proposes a kind of three-phase contrarotating motor at above-mentioned shortcoming, can effectively solve the problem of above-mentioned traditional single phase contrarotating motor.It below is brief description of the present invention.
Summary of the invention
The fan that main purpose of the present invention is to provide a kind of three-phase contrarotating motor and comprises it, this motor comprises single stator pack and birotor; This stator pack adopts aircored triple line ring recess, and this birotor is respectively the number of magnetic poles the first rotor inequality and second rotor.By this kind three-phase drive mode and the different dual-rotor structure of number of magnetic poles, this motor can be guaranteed normally transhipment to be done.
For achieving the above object, this stator pack comprises at least one three-phase coil group, each three-phase coil group has three coil grooves, when this motor rotation, the magnetic line of force that one coil groove of this three-phase coil group can be responded to the magnetic pole of this first rotor and second rotor distributes, and the generation back electromotive force, and then determine the sense of current of other two coil, that is determine the excitatory direction of this two wires ring recess.Two wires ring recess after this is excitatory can produce magnetic effect and drive running with this first rotor and second rotor; And because the number of magnetic poles of this first and second rotor and the coil groove of this stator pack have a special ratios, the coil groove number that is preferably stator pack is 3: 4 with the number of magnetic poles ratio of the first rotor, and the number of magnetic poles ratio of the coil groove number of stator pack and second rotor is 3: 2, can guarantee that this first rotor and second rotor normally do transhipment.In addition, because the number of magnet poles of this first rotor and second rotor has special ratios, the magnetic pole of the magnetic pole of the first rotor and second rotor can not attract each other, so can eliminate a power of motor rotation.
In addition, if this first rotor or second rotor are motionless because of any factor, can't influence the rotation of another rotor, it is not because three-phase contrarotating motor of the present invention must utilize Hall subassembly to come the magnetic pole of inductiopn rotor, but utilize one of this three-phase coil group coil groove to respond to the magnetic pole of the first rotor or second rotor, so when a rotor wherein was motionless, the coil groove still can be responded to the magnetic pole of another rotor, and continue to drive its running.
In addition, the rotating speed of this first rotor and second rotor can be by the size of magnetic pole strength, control with the size of gaps of this stator pack.
According to above-mentioned conception, the present invention also provides a fan with above-mentioned motor, and it comprises a housing, has a pedestal, is arranged in it; Two impellers have the rotor of above-mentioned tool different magnetic poles number respectively, are arranged at this pedestal both sides respectively; Stator group is made up of the three-phase coil group, and wherein this stator pack is embedded among this pedestal, in order to drive this two rotors; And an axle center, be arranged in the center of this housing and pedestal.This pedestal is connected with the inner surface of this housing and is fixed in this housing by a plurality of connectors; This connector can be made up of rib or stator blade.In addition, this pedestal has a plurality of hollow bulbs, runs through this pedestal respectively and protrudes in the two opposite sides of this pedestal, and is wherein ccontaining for this stator pack.This fan also comprises a control assembly, with this stator pack electrically connect, can be arranged on this housing outside or the pedestal.
In addition, the blade of this bilobed wheel can design to have different wind and cuts load, also the size of rotation rate-controllable.
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Description of drawings
Fig. 1 is the running schematic diagram of traditional single phase contrarotating motor.
Fig. 2 is the sectional arrangement drawing of a preferred embodiment of fan of the present invention.
Fig. 3 is the sectional arrangement drawing of another preferred embodiment of fan of the present invention.
Fig. 4 A is the running schematic diagram of three-phase contrarotating motor of the present invention.
Fig. 4 B is the triple line ring recess schematic diagram of Fig. 4 A.
Fig. 5 A is another schematic diagram of the running of three-phase contrarotating motor of the present invention.
Fig. 5 B is the triple line ring recess schematic diagram of Fig. 5 A.
Fig. 6 is another embodiment schematic diagram of three-phase contrarotating motor of the present invention.
Fig. 7 is the 3rd an embodiment schematic diagram of three-phase contrarotating motor of the present invention.
The primary clustering symbol description
11: upper strata rotor 12: lower floor's rotor
13: middle level stator pack 2: fan
21: housing 211: pedestal
21 10: through hole 2111: hollow bulb
212: connector 22: stator pack
221,222: 23: the first impellers of three-phase coil group
23 ': the second impeller 231,231 ': wheel hub
232,232 ': blade 233,233 ': magnet ring
234,234 ': iron plate 24: axle center
25: control assembly 31: the first rotor
32: the second rotor A, B, C: coil groove
H1, H2, H3: Hall subassembly
Embodiment
See also Fig. 2, three-phase contrarotating fan 2 of the present invention comprises a housing 21, a pedestal 211, stator group 22, first impeller 23, second impeller 23 ', an axle center 24 and a control assembly 25.This pedestal 211 is arranged in this housing 21, is connected with the inner surface of this housing 21 and can be fixed in this housing 21 by a plurality of connectors 212, and these connectors 212 can be rib or stator blade.The center of this pedestal 211 has a through hole 2110, uses to wear fixing for this axle center 24; And have around the center that six hollow bulbs 2111 run through this pedestal 211 respectively and the two opposite sides that protrudes in this pedestal 211 is wherein ccontaining for this stator pack 23.
This stator pack 22 is by 221,222 compositions of two three-phase coil groups, and each three-phase coil group has three coil groove A respectively, B, and C (please consulting Fig. 4 A simultaneously), and these coil grooves A, B, the end of C electrically connect each other (please consult Fig. 4 B) together simultaneously.Wherein each coil groove is placed in respectively in the hollow bulb 2111 of this pedestal 211, in order to drive this first and second impeller 23,23 '.
This first impeller 23 and second impeller 23 ' are made of a wheel hub 231,231 ', a plurality of blade 232,232 ', a magnet ring 233,233 ' and an iron plate 234,234 ' respectively.This iron plate 234,234 ' and this magnet ring 233,233 ' are attached at the inner surface of this wheel hub 231,231 ' in regular turn, and these a plurality of blades 232,232 ' then are located on around this wheel hub 231,231 '.The magnet ring 233 of this first impeller 23 has different number of magnet poles with the magnet ring 233 ' of this second impeller 23 ', and the magnet ring 233 of first impeller 23 has the ends of the earth in this example, with opposite magnetic pole (as: N, S, N, S, N, S, N, S) arrange in regular turn, and the magnet ring 233 ' of this second impeller 23 ' has four utmost points, with opposite magnetic pole (as: N, S, N S) arranges (please consulting Fig. 4 A simultaneously) in regular turn.In addition, the blade 232,232 ' of this first impeller 23 and second impeller 23 ' can design to have different wind and cuts load, can be used to control the size of rotating speed.
This axle center 24 axially wears and is fixed in the center of this first impeller 23, this second impeller 23 ' and pedestal 211, and this axle center 24 is supported by at least one bearing 235,235 '.This control assembly 25 for example is a printed circuit board (PCB), with these stator pack 22 electrically connects, and is arranged at the outer surface of this housing 21.Design suitable pedestal 211 sizes, this control assembly 25 also can be arranged on this pedestal 211, as shown in Figure 3.
Please consult Fig. 4 A, Fig. 4 B simultaneously, Fig. 4 A is the motor running schematic diagram of this fan 2, and wherein the magnet ring 233 of this first impeller 23 is equivalent to the first rotor 31 with iron plate 234, and the magnet ring 233 ' and the iron plate 234 ' of this second impeller 23 ' are equivalent to second rotor 32.With present embodiment, when this motor rotation, the magnetic line of force that the coil groove C of each three-phase coil group 221,222 of this stator pack 22 can respond to the magnetic pole of this first rotor 31 and second rotor 32 earlier distributes, and the generation back electromotive force, and then determining other two wires ring recess A, the sense of current of B is shown in Fig. 4 B, that is determine this two wires ring recess A, the excitatory direction of B, this enforcement center line ring recess A produces the S utmost point in the face of a side of the first rotor 31, and a side of facing second rotor 32 then produces the N utmost point; Coil groove B then produces the N utmost point in the face of a side of the first rotor 31, and a side of facing second rotor 32 then produces the S utmost point.Two wires ring recess B after this is excitatory, C can produce magnetic effect and drive running with this first rotor 31 and second rotor 32.Please consult Fig. 5 A, Fig. 5 B again, next step then changes the magnetic line of force distribution of being responded to the magnetic pole of this first rotor 31 and second rotor 32 by coil groove B, and the generation back electromotive force, and then decision coil groove A, the sense of current of C, shown in Fig. 5 B, and online ring recess A is in the face of the side generation S utmost point of the first rotor 31, in the face of the side generation N utmost point of second rotor 32; Coil groove C then produces the N utmost point in the face of a side of the first rotor 31, and a side of facing second rotor 32 then produces the S utmost point.Two wires ring recess A after this is excitatory, C can produce magnetic effect again and drive running with this first rotor 31 and second rotor 32.In like manner, next step is then responded to the magnetic line of force distribution of the magnetic pole of this first rotor 31 and second rotor 32 by coil groove A again, and produces back electromotive force, and then decision coil groove B, the sense of current of C drives this first rotor 31 and this second rotor running, repeats no more in this.
Can be in order to ensure this first rotor 31 and second rotor 32 normally in the opposite direction to changeing, this the first rotor 31 not only has the number of magnet poles of different numbers with this second rotor 32, and the coil groove number of this stator pack 22 is 3: 4 with the number of magnetic poles ratio of the first rotor 31, and the number of magnetic poles ratio of the coil groove number of stator pack and second rotor is 3: 2.In addition, because the number of magnet poles of this first rotor and second rotor has special ratios (2: 1), and stator pack 22 need not have silicon steel sheet or design unshakable in one's determination, so the magnetic pole of this first rotor 31 and the magnetic pole of second rotor 32 can not attract each other, also can not inhale mutually, can eliminate the power that motor rotation produces with stator pack 22.Hence one can see that, this motor except the number of magnetic poles as the first rotor 31 of present embodiment be the magnetic pole of 8, second rotor 32 be 4 with the coil groove number of stator pack 23 be 6, the magnetic pole that the number of magnetic poles of the first rotor 31 also can be 12, second rotor 32 be 6 and the coil groove number of stator pack 23 be 9, as shown in Figure 6; Perhaps the number of magnetic poles of the first rotor 31 be the number of magnetic poles of 16, second rotor 32 be 8 and the coil groove number of stator pack 23 be 12, as shown in Figure 7.
Moreover, if this first rotor 31 or second rotor 32 are motionless because of any factor, can't influence the rotation of another rotor, it is not because three-phase contrarotating motor of the present invention must utilize Hall subassembly to come the magnetic pole of inductiopn rotor, but a coil groove that utilizes this three-phase coil group 221,222 is responded to the magnetic pole of the first rotor 31 or second rotor 32, so when a rotor wherein is motionless, the coil groove still can be responded to the magnetic pole of another rotor, and continues to drive its running.In addition, the rotating speed of this first rotor 31 and second rotor 32 can be controlled by the size of magnetic pole strength and with the size of gaps of this stator pack.
The above only is the preferred embodiments of the present invention, and the foregoing description only is used for illustrating but not in order to limit the present invention, category of the present invention is defined by claims.All according to equalization variation and modification that the present invention did, all should belong to covering scope of the present invention.
Claims (18)
1. motor comprises:
Stator group;
One the first rotor has a plurality of first magnetic poles, is positioned at a side of this stator pack; And
One second rotor has a plurality of second magnetic poles, is positioned at the opposite side of this stator pack, and faces setting with this first rotor;
Wherein this number of magnet poles of this first rotor is different from the number of magnet poles of this second rotor.
2. motor according to claim 1 is characterized in that, this stator pack comprises at least one three-phase coil group, corresponding to this first rotor and this second rotor; Each this three-phase coil group comprises three coil grooves, and an end of these three coil grooves is electrically connect each other.
3. motor according to claim 2 is characterized in that, the number of these coil grooves is 3: 4 with this first number of magnet poles ratio of this first rotor.
4. according to claim 2 or 3 described motors, it is characterized in that the number of these coil grooves is 3: 2 with this second number of magnet poles ratio of this second rotor.
5. motor according to claim 1 is characterized in that, the number of this of this first rotor first magnetic pole is 2: 1 with the number ratio of this second magnetic pole of this second rotor.
6. motor according to claim 1 is characterized in that, the magnetic pole adjacent one another are of this first rotor and the magnetic pole adjacent one another are of this second rotor have opposite polarity respectively.
7. motor according to claim 1 is characterized in that, this first rotor comprises an iron plate and a magnet ring, and this magnet ring forms these a plurality of first magnetic poles; This second rotor comprises an iron plate and a magnet ring, and this magnet ring forms these a plurality of second magnetic poles.
8. motor according to claim 1 is characterized in that, this first rotor is identical or inequality with the gap of this stator pack and the gap of this second rotor and this stator pack.
9. motor according to claim 1 is characterized in that, the magnetic size of this magnetic pole of this first rotor is identical or inequality with the magnetic size of this magnetic pole of this second rotor.
10. fan comprises:
One pedestal:
Stator group is made up of a plurality of coil grooves, is arranged in this pedestal;
Two rotors are provided with the both sides of this pedestal respectively, and respectively to these a plurality of ring recess that should stator pack, wherein this two rotor has different number of magnet poles; And
One axle center is arranged in this pedestal and this two rotor, in order to accept this two rotor.
11. fan according to claim 10 is characterized in that, this pedestal is fixed in the housing, and this pedestal links by a plurality of connectors and this housing; This fan also comprises a control assembly, is arranged on this pedestal or on the housing, and the center of this pedestal has a through hole, wears fixingly for this axle center, and accept by a plurality of bearings in this axle center.
12. fan according to claim 10 is characterized in that, this pedestal has that a plurality of hollow bulbs run through this pedestal respectively and the two opposite sides that protrudes in this pedestal is wherein ccontaining for this stator pack.
13. fan according to claim 10 is characterized in that, this two rotor comprises respectively:
One wheel hub;
A plurality of blades, ring is established around this wheel hub;
One iron plate is attached at the inner surface of this wheel hub; And
One magnet ring is attached at this iron plate.
14. fan according to claim 13 is characterized in that, this bitrochanteric this magnet ring has different number of magnet poles respectively.
15. fan according to claim 14 is characterized in that, this bitrochanteric number of magnet poles ratio is 2: 1.
16. fan according to claim 14 is characterized in that, the magnetic pole adjacent one another are of these magnet rings has opposite polarity respectively.
17. fan according to claim 13 is characterized in that, the number of these coil grooves is 3: 4 with the number of magnet poles ratio of one of this two rotor.
18., it is characterized in that the number of these coil grooves is 3: 2 with the number of magnet poles ratio of one of this two rotor, and the number of these coil grooves is between this bitrochanteric number of magnet poles according to claim 13 or 17 described fans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100051780A CN100527571C (en) | 2006-01-13 | 2006-01-13 | Three-phase contrarotating electric machine and fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100051780A CN100527571C (en) | 2006-01-13 | 2006-01-13 | Three-phase contrarotating electric machine and fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101001035A true CN101001035A (en) | 2007-07-18 |
| CN100527571C CN100527571C (en) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100051780A Expired - Fee Related CN100527571C (en) | 2006-01-13 | 2006-01-13 | Three-phase contrarotating electric machine and fan |
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|---|---|
| CN (1) | CN100527571C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035367A (en) * | 2017-04-28 | 2017-08-11 | 北京捷威思特科技有限公司 | NMR while drilling instrument magnet |
| CN109681448A (en) * | 2018-11-06 | 2019-04-26 | 樊品良 | A kind of sky oxygen pump |
-
2006
- 2006-01-13 CN CNB2006100051780A patent/CN100527571C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035367A (en) * | 2017-04-28 | 2017-08-11 | 北京捷威思特科技有限公司 | NMR while drilling instrument magnet |
| CN109681448A (en) * | 2018-11-06 | 2019-04-26 | 樊品良 | A kind of sky oxygen pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100527571C (en) | 2009-08-12 |
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