CN207835323U - Bearing-free switch reluctance motor - Google Patents
Bearing-free switch reluctance motor Download PDFInfo
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- CN207835323U CN207835323U CN201721668406.2U CN201721668406U CN207835323U CN 207835323 U CN207835323 U CN 207835323U CN 201721668406 U CN201721668406 U CN 201721668406U CN 207835323 U CN207835323 U CN 207835323U
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Abstract
The utility model is related to a kind of bearing-free switch reluctance motors, it is made of two 12/14 bearing-free switch reluctance motors of pyramid type, 12/14 bearing-free switch reluctance motor of each pyramid type includes stator, rotor, shaft, levitation force winding coil and torque winding coil again；Stator is located at outermost, has 12 stator poles, and stator poles are divided into suspending power pole and torque pole；The extremely upper winding levitation force winding coil of suspending power is for generating suspending power, and the extremely upper winding torque winding coil of torque is for generating torque；The inside of stator is rotor, has 14 rotor poles；The inside of rotor core is shaft；Two conical rotor bottom surfaces or top surface are opposite, and coning angle is equal；Two stators coordinate two rotors to be assembled and ensure that the air gap between stator and rotor is uniform.The utility model uses pyramid type rotor structure, the advantages of not only inheriting traditional 12/14 bearing-free switch reluctance motor, and it is integrated with axial displacement control function, motor can flexibly be controlled in five degree of freedom, realize suspending certainly completely for rotor.
Description
Technical field
The utility model is related to a kind of bearing-free switch reluctance motors, can be applied to high speed, ultrahigh speed, circumstance of temperature difference variation
Big or not easy to repair driving occasion.
Background technology
With growing continuously and fast for national economy, the industrial application such as turbomolecular pump of many modernizations, centrifugation
Machine, high-speed machine tool, compressor, flywheel energy storage, aerospace etc. are required for using high speed or super high speed motor.But work as use
Traditional mechanical bearing come support high speed or super high speed motor shaft when, it will lead to the problem of many.For example, the high speed of rotor
Rotation can be such that the frictional resistance of mechanical bearing increases, and abrasion aggravates, and leads to that the motor feels hot, and this not only lowers motors
Working efficiency, shorten the service life of motor and mechanical bearing, further increase the maintenance load of motor and bearing.Moreover, mechanical
The required lubricating oil of bearing can not use under high vacuum, high or extremely low temperature environment.Although air supporting, liquid bearing skill
Art can realize between rotor and shaft it is contactless, without friction, but air supporting, liquid bearing technology be required to be equipped with it is special
The air pressure of door, hydraulic system, this will make, and air supporting, the bulky, complicated of liquid bearing motor, energy consumption is more, efficiency is low.
Meanwhile the failure of air pressure, hydraulic system can make air supporting, liquid bearing failure, be unable to operate normally, reduce so as to cause motor
The reliability of electric system.
Compared with air supporting, liquid bearing technology, magnetic bearing technology fundamentally changes traditional rotor supports form, it
With it is contactless, without abrasion, high speed, high-precision, the long-life, need not seal and lubricate, be easily achieved active control etc. one
Serial good characteristic.Bearing-free switch reluctance motor is grown up on the basis of magnetic axis bearing motor and switched reluctance machines
, not only have many advantages, such as compact-sized bearing-free motor, output power, cleaning, but also inherit switched reluctance machines
Good characteristic, such as it is simple in structure it is firm, fault-tolerant ability is strong, manufacturing cost is low.Therefore, bearing-free switch reluctance motor can be extensive
The driving occasion big or not easy to repair applied to high speed, ultrahigh speed, variation of ambient temperature.In order to realize that rotor stability suspends certainly,
Bearing-free motor is needed there are five control freedom degree, but only there are two degree of freedom for existing bearing-free switch reluctance motor, other
Three degree of freedom is provided by magnetic bearing.Such a structure increases the axial lengths of motor, limit critical rotor speed.In addition,
Magnetic axis bearing motor only plays the part of the role of Auxiliary support in entire electric system, does not provide any torque output, reduces whole
The working efficiency of a electric system.
Utility model content
In order to solve the above problem existing for existing bearing-free switch reluctance motor, the purpose of this utility model is to provide
One kind having entirely autonomous suspending power, the bearing-free switch reluctance motor that can be flexibly controlled on five degree of freedom.
The purpose of this utility model is achieved through the following technical solutions：
The utility model includes two pyramid type 12/14 bearing-free switch magnetic-resistance electricity that structure is identical, is connected by shaft
Machine, 12/14 bearing-free switch reluctance motor of each pyramid type include stator, rotor, levitation force winding coil and torque winding
Coil, wherein stator are located at outermost, and there are 12 stator poles, 12 stator poles to be divided into eight torque poles and along the circumferential direction
Four uniformly distributed suspending power poles, eight torque poles two are one group, are evenly distributed between each suspending power pole, each described
Suspending power extremely on be wound with levitation force winding coil for generating suspending power, be wound with and be used in each torque extremely
Generate the torque winding coil of torque；The rotor is located at the inside of stator, and the iron core of the rotor is salient-pole structure, i.e., described to turn
The iron core of son is along the circumferential direction evenly equipped with the identical rotor pole of 14 shape sizes, and groove is equipped between adjacent rotor pole；It is described
Shaft is passed through by the core interior of rotor, and the rotor in two 12/14 bearing-free switch reluctance motors of pyramid type passes through the shaft
It is connected, the bottom surface of two rotors is opposite or top surface is opposite；Determine in two 12/14 bearing-free switch reluctance motors of pyramid type
Son coordinates respective rotor assembly, and there are uniform air gaps between the stator and rotor；
Wherein：The suspending power pole and torque pole are that stator inner wall is radially inwardly extending and formed, the suspending power
The polar arc of pole is equal to a rotor polar distance；The polar arc of the torque pole is equal with the polar arc of rotor pole, and is equal to the suspending power
The half of pole polar arc；
The rotor pole is in a strip shape or rotor pole is in a strip shape and is equipped with platform along its length in the same side of each rotor pole
Rank or rotor pole it is in a strip shape and on each rotor pole be equipped with protrusion；The center line of each torque pole is directed toward stator and rotor
The center of circle；Each suspending power extremely on levitation force winding coil individually become a phase；The rotor be in pyramid type, two 12/
Conical rotor coning angle in 14 bearing-free switch reluctance motors is equal；The levitation force winding coil and torque winding wire
Circle is centralized winding；
In one of them 12/14 bearing-free switch reluctance motor in eight torques extremely, in four of the setting of a diagonal line
Torque winding coil series connection in torque extremely becomes A phase windings, in the torque in four torques extremely of another diagonal line setting
Winding coil, which is connected, becomes B phase windings, in another 12/14 bearing-free switch reluctance motor in eight torques extremely, with winding A phases
Torque winding coil series connection in identical four torques extremely in four torque pole position of winding becomes A' phase windings, with
Wind B phase windings identical four torques extremely in four torque pole position on torque winding coil series connection become B' phases around
Group, the A phase windings and the connection type of A' phase windings and the B phase windings are identical as the connection type of B' phase windings, for string
Join or is connected in parallel；
The material of the stator and rotor is the good material of magnetic property；The material of the shaft is non-magnet material.
The advantages of the utility model is with good effect：
The utility model proposes axial displacement control functions, can flexibly be controlled motor in five degree of freedom,
Suspending certainly completely for rotor is realized, to reduce the axial length of motor, improves the overlooking rotating speed and fortune of motor
Row reliability.
Description of the drawings
Fig. 1 is one of the utility model axial section (pyramid type rotor bottom surface is opposite)；
Fig. 2 is one of the utility model structural front view (pyramid type rotor bottom surface is opposite)；
Fig. 3 is two (pyramid type rotor top surface is opposite) of the utility model axial section；
Fig. 4 is two (pyramid type rotor top surface is opposite) of the utility model structural front view；
Fig. 5 is that the winding coil of the utility model is distributed；
Fig. 6 is one of the utility model rotor structure schematic diagram (general expression)；
Fig. 7 is two (phase step types) of the utility model rotor structure schematic diagram；
Fig. 8 is three (side convex types) of the utility model rotor structure schematic diagram
Fig. 9 is the utility model levitation force winding coil flux path profile；
Figure 10 is the utility model torque winding coil magnetic flux path figure；
Wherein：1 is stator, and 2 be rotor, and 3 be shaft, and 4 be levitation force winding coil, and 5 be torque winding coil, and 6 be outstanding
Buoyancy pole, 7 be torque pole, and 8 be rotor pole, and 10 be step, and 11 be protrusion.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 9 and Figure 10, the bearing-free switch reluctance motor of the utility model includes structure phase
Together, pass through two 12/14 bearing-free switch reluctance motors of pyramid type that shaft 3 is connected, 12/14 bearing-free switch of each pyramid type
Reluctance motor includes stator 1, rotor 2, levitation force winding coil 4 and torque winding coil 5, one of pyramid type 12/
14 bearing-free switch reluctance motors include stator 1a and rotor 2a, another 12/14 bearing-free switch reluctance motor packet of pyramid type
Include stator 1b and rotor 2b.
The outermost of bearing-free switch reluctance motor is stator 1, and there are 12 stator poles, 12 stator poles to be divided into eight
Torque pole 7 and along the circumferential direction uniformly distributed four suspending power poles 6, four suspending power poles 6 of the present embodiment are along positive and negative X, Y-axis
Direction is orthogonal distribution.Eight torque poles 7 two are one group, are evenly distributed between each suspending power pole 6.Suspending power pole 6 with turn
Moment pole 7 is that 1 inner wall of stator is radially inwardly extending and formed.It is wound with levitation force winding coil on each suspending power pole 6
4, for generating suspending power, and the levitation force winding coil 4 on each suspending power pole 6 individually becomes a phase.Each torque pole 7
On be wound with torque winding coil 5, for generating torque.The levitation force winding coil 4 and torque winding wire of the utility model
Circle 5 is centralized winding.
Rotor 2 is located at the inside of stator 1, the iron core of the rotor 2 be salient-pole structure, the i.e. iron core of rotor 2 along the circumferential direction
It is evenly equipped with the identical rotor pole 8 of 14 shape sizes, groove is equipped between adjacent rotor pole 8.Rotor 2 is in pyramid type, two circles
The coning angle of pyramid type rotor 2 in tapered 12/14 bearing-free switch reluctance motor is equal, and coning angle can exist according to actual demand
Change within the scope of 1 °~89 °.Shaft 3 is passed through by the core interior of rotor 2, two pyramid type 12/14 bearing-free switch magnetic-resistance electricity
Rotor 2 in machine is connected by the shaft 3, and the center line of each torque pole 7 is directed toward the center of circle of stator 1 and rotor 2.Two pyramid types
Rotor 2 can bottom surface with respect to (as shown in Figure 1 and Figure 2), also can top surface relatively (as shown in Figure 3, Figure 4).Two pyramid types 12/14
Stator 1 in bearing-free switch reluctance motor coordinate respective rotor 2 assemble, and ensure between stator 1 and rotor 2 there are
Air gap is uniform.In addition, in order to make direct torque and suspending power control nature decoupling, the polar arc of suspending power pole 6 is equal to a rotor
Pole span.The polar arc of suspending power pole 6 is the angle theta between the both ends and stator 1,2 circle center line connecting of rotor of a suspending power pole 61, turn
Angle of the sub- pole span between adjacent rotor pole the same side outside end and stator 1,2 circle center line connecting of rotor.
The polar arc of torque pole 7 is equal with the polar arc of rotor pole 8, and equal to the half of 6 polar arc of suspending power pole；Torque pole 7
Polar arc is the angle theta between the both ends and stator 1,2 circle center line connecting of rotor of a torque pole 72, the polar arc of rotor pole 8 is one
The angle theta of distance between the both ends of rotor pole 8 and stator 1,2 circle center line connecting of rotor3.This structure can maximize motor output work
Rate.
The rotor pole 8 of the utility model rotor 2 can be general expression, as shown in Figure 6；Identical i.e. each 8 shape of rotor pole (is in item
Shape), it is equal in magnitude.If in order to enhance the self-startup ability of motor, dissymmetrical structure can be used in rotor pole, such as phase step type or side
Any one in convex type.Phase step type as shown in fig. 7, rotor pole 8 it is in a strip shape and in the same side of each rotor pole 8 along length
Direction is equipped with step 10.Side convex type as shown in figure 8, rotor pole 8 it is in a strip shape and on each rotor pole 8 be equipped with protrusion 11, should
Protrusion 11 can be extended to form in the same end of each rotor pole 8 to the same side, can also be arranged in any one of 8 axial direction of each rotor pole
Side or centre position.
It it is in one as shown in figure 5, in 12/14 bearing-free switch reluctance motor of one of pyramid type in eight torque poles 7
Torque winding coil A in four torques extremely of diagonal line setting1、 A2、A3And A4Series connection becomes A phase windings, right in another
Torque winding coil B in four torques extremely of linea angulata setting1、B2、B3And B4Series connection becomes B phase windings；Another pyramid type
In 12/14 bearing-free switch reluctance motor in eight torque poles 7, in the torque in four torques extremely of diagonal line setting
Winding coil A5、A6、A7And A8Series connection become A' phase windings, and with winding A phase windings four torque pole position phase
Together, in the torque winding coil B in four torques extremely of another diagonal line setting5、B6、B7And B8Series connection becomes B' phase windings,
And it is identical as winding four torque pole positions of B phase windings.According to actual conditions, the company of A phase windings and A' phase windings
It connects mode and B phase windings is identical as the connection type of B' phase windings, can be connected in series or in parallel.
For any one 12/14 bearing-free switch reluctance motor of pyramid type, when to its positive direction of the x-axis and positive direction of the y-axis
Levitation force winding coil 4 is powered simultaneously, and the size of current in two levitation force winding coils 4 is equal, the magnetic flux distribution of motor
As shown in figure 9, its magnetic circuit is：Since the suspending power pole 6 of positive direction of the x-axis, just by air gap 9d, rotor 2, air gap 9a, y-axis
Direction suspending power pole 6, stator yoke return to the suspending power pole 6 of positive direction of the x-axis.
As shown in Figure 10, by taking conical 12/14 bearing-free switch reluctance motor in left side as an example, torque winding coil
A1、A2、A3And A4Series connection becomes A phase windings, is powered when to A phase windings, magnetic flux distribution is as shown in Figure 10, which is
Short magnetic circuit.
Stator 1 and rotor 2 in the utility model use the good electric thin steel sheet of magnetic property, such as electrical pure iron, electricity
The magnetic materials punching presses such as work silicon steel sheet DW350, DR470, DR510,35PN440,35PN210 and M19 fold.Shaft 3 is adopted
It is made of non-magnet material, such as steel, aluminium, titanium alloy.Levitation force winding coil 4 and torque winding coil 5 can use electric conductivity
Paint-dipping drying forms after good copper wire winding.
The operation principle of the utility model is：
12/14 bearing-free switch reluctance motor, due to the particularity of structure, suspending power control solves naturally with direct torque
Coupling.Suspending power is generated by the levitation force winding coil 4 on suspending power pole 6, the levitation position for controlling rotor 2.Torque is by turning
Torque winding coil 5 on moment pole 7 generates, for dragging rotor 2 and load running.
Radial suspension force generates principle：For each 12/14 bearing-free switch reluctance motor of pyramid type, when giving its x-axis
When the levitation force winding coil 4 of positive direction is powered, the magnetic flux density in air gap 9d is more than the magnetic flux density in air gap 9b, motor
A radial suspension force along positive direction of the x-axis will be generated；When the energization of levitation force winding coil 4 to its negative direction of the x-axis,
Magnetic flux density in air gap 9b is more than the magnetic flux density in air gap 9d, and motor will generate one and be hanged along the radial direction of negative direction of the x-axis
Buoyancy.Similarly, when the energization of levitation force winding coil 4 to its positive direction of the y-axis, motor will generate one along positive direction of the y-axis
Radial suspension force；When the energization of levitation force winding coil 4 to its negative direction of the y-axis, motor will generate one along y-axis losing side
To radial suspension force.Therefore, the radial suspension force of any direction can pass through the radial direction of synthesis x-axis direction and y-axis direction
Suspending power generates.
Axial suspension power generates principle：For the bearing-free switch reluctance motor in the utility model, by taking Fig. 1 as an example, when
Rotor 2 is symmetrical in the energization of center and two 12/14 bearing-free switch reluctance motors of pyramid type, and motor will not generate axial direction
Suspending power.If increasing the electric current in the levitation force winding coil 4 in 12/14 bearing-free switch reluctance motor of left side, left side 12/
Air gap flux density in 14 bearing-free switch reluctance motors will be more than the gas in 12/14 bearing-free switch reluctance motor of right side
Gap magnetic flux density, motor will will produce an axial suspension power to the left.Similarly, if increasing 12/14 bearing-free switch of right side
Levitation force winding electric current in reluctance motor, motor will will produce an axial suspension power to the right.
Torque generates principle：By taking 12/14 bearing-free switch reluctance motor of left side pyramid type as an example, torque winding coil
A1、A2、A3And A4Series connection becomes A phase windings, torque winding coil B1、B2、B3And B4Series connection becomes B phase windings.When rotor pole and A
When torque pole where phase winding starts overlapping, it is powered to A phase windings, according to magnetic resistance minimum principle-magnetic flux always along magnetic resistance
Minimum path is closed, and motor will will produce a tangential magnetic pull, the i.e. torque of magnetic resistance property, and dragging rotor 2 turns to and A phases
The position of torque pole alignment where winding.It is logical to B phase windings when rotor pole is aligned with the torque pole where A phase windings
Electricity, motor will will produce a torque dragging rotor 2 and turn to the position being aligned with the torque pole where B phase windings.It repeats above-mentioned
Process, motor will will produce continuous torque, to drag rotor and load rotation.
Claims (8)
1. a kind of bearing-free switch reluctance motor, it is characterised in that：Two circles that are identical including structure, being connected by shaft (3)
Tapered 12/14 bearing-free switch reluctance motor, 12/14 bearing-free switch reluctance motor of each pyramid type include stator (1), turn
Sub (2), levitation force winding coil (4) and torque winding coil (5), wherein stator (1) are located at outermost, have 12 stators
Pole, 12 stator poles are divided into eight torque poles (7) and along the circumferential direction uniformly distributed four suspending power poles (6), eight torque poles
(7) two be one group, be evenly distributed between each suspending power pole (6), wound on each suspending power pole (6) useful
In the levitation force winding coil (4) for generating suspending power, the torque for generating torque is each wound on the torque pole (7)
Winding coil (5)；The rotor (2) is located at the inside of stator (1), and the iron core of the rotor (2) is salient-pole structure, i.e., the described rotor
(2) iron core is along the circumferential direction evenly equipped with the identical rotor pole (8) of 14 shape sizes, and ditch is equipped between adjacent rotor pole (8)
Slot；The shaft (3) is passed through by the core interior of rotor (2), is turned in two 12/14 bearing-free switch reluctance motors of pyramid type
Sub (2) are connected by the shaft (3), and the bottom surface of two rotors (2) is opposite or top surface is opposite；Two 12/14 nothings of pyramid type
Stator (1) in bearing switched reluctance machines coordinates respective rotor (2) assembly, and is stayed between the stator (1) and rotor (2)
There is uniform air gap.
2. bearing-free switch reluctance motor according to claim 1, it is characterised in that：The suspending power pole (6) and torque
Pole (7) is that inner wall is radially inwardly extending and is formed for stator (1), and the polar arc of the suspending power pole (6) is equal to a rotor pole
Away from；The polar arc of the torque pole (7) is equal with the polar arc of rotor pole (8), and equal to the half of suspending power pole (6) polar arc.
3. bearing-free switch reluctance motor according to claim 1, it is characterised in that：The rotor pole (8) is in a strip shape, or
Rotor pole (8) is in a strip shape and is equipped with step (10) or rotor pole (8) along its length in item in the same side of each rotor pole (8)
It shape and is equipped with raised (11) on each rotor pole (8).
4. bearing-free switch reluctance motor according to claim 1, it is characterised in that：The center of each torque pole (7)
Line is directed toward the center of circle of stator (1) and rotor (2).
5. bearing-free switch reluctance motor according to claim 1, it is characterised in that：On each suspending power pole (6)
Levitation force winding coil (4) individually become a phase.
6. bearing-free switch reluctance motor according to claim 1, it is characterised in that：The rotor (2) be in pyramid type, two
Conical rotor (2) coning angle in a 12/14 bearing-free switch reluctance motor is equal.
7. bearing-free switch reluctance motor according to claim 1, it is characterised in that：The levitation force winding coil (4)
It is centralized winding with torque winding coil (5).
8. bearing-free switch reluctance motor according to claim 1, it is characterised in that：One of them 12/14 bearing-free is opened
It closes in reluctance motor in eight torque poles (7), in the torque winding coil series connection in four torques extremely of diagonal line setting
As A phase windings, become B phase windings in the torque winding coil series connection in four torques extremely of another diagonal line setting, separately
It is in place with four torque poles institute of winding A phase windings in one 12/14 bearing-free switch reluctance motor in eight torque poles (7)
The torque winding coil series connection set in identical four torques extremely becomes A' phase windings, four torque poles with winding B phase windings
Torque winding coil series connection in identical four torques extremely in position becomes B' phase windings, the A phase windings and A' phases around
The connection type and the B phase windings of group are identical as the connection type of B' phase windings, to be connected in series or in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721668406.2U CN207835323U (en) | 2017-12-05 | 2017-12-05 | Bearing-free switch reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721668406.2U CN207835323U (en) | 2017-12-05 | 2017-12-05 | Bearing-free switch reluctance motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207835323U true CN207835323U (en) | 2018-09-07 |
Family
ID=63385703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721668406.2U Active CN207835323U (en) | 2017-12-05 | 2017-12-05 | Bearing-free switch reluctance motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207835323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888041A (en) * | 2017-12-05 | 2018-04-06 | 中国科学院沈阳自动化研究所 | A kind of bearing-free switch reluctance motor |
| CN112713812A (en) * | 2020-12-16 | 2021-04-27 | 江苏大学 | Electric decoupling type magnetic suspension switched reluctance motor |
-
2017
- 2017-12-05 CN CN201721668406.2U patent/CN207835323U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888041A (en) * | 2017-12-05 | 2018-04-06 | 中国科学院沈阳自动化研究所 | A kind of bearing-free switch reluctance motor |
| CN107888041B (en) * | 2017-12-05 | 2023-12-12 | 中国科学院沈阳自动化研究所 | Bearingless switch reluctance motor |
| CN112713812A (en) * | 2020-12-16 | 2021-04-27 | 江苏大学 | Electric decoupling type magnetic suspension switched reluctance motor |
| CN112713812B (en) * | 2020-12-16 | 2022-04-26 | 江苏大学 | Electric decoupling type magnetic suspension switched reluctance motor |
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