CN103312103A - Bearingless switched reluctance motor with composite rotor structure - Google Patents
Bearingless switched reluctance motor with composite rotor structure Download PDFInfo
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- CN103312103A CN103312103A CN2013102033486A CN201310203348A CN103312103A CN 103312103 A CN103312103 A CN 103312103A CN 2013102033486 A CN2013102033486 A CN 2013102033486A CN 201310203348 A CN201310203348 A CN 201310203348A CN 103312103 A CN103312103 A CN 103312103A
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Abstract
The invention relates to a bearingless switched reluctance motor with a composite rotor structure and belongs to the field of magnetic levitation switched reluctance motors of motors, a set of windings are wound on stator teeth of a stator; rotors consist of a torque rotor and a levitation force rotor; the torque rotor and the levitation force rotor are arranged in the stator in an axial superposition manner; the torque rotor is used for generating the torque; the levitation force rotor is used for generating a levitation force and part of torque. According to the bearingless switched reluctance motor provided by the invention, only one winding is wound on the stator teeth; and compared with the traditional dual-winding bearingless switched reluctance motor, the bearingless switched reluctance motor disclosed by the invention has the advantages that the structure is simple, the coil space factor is high, copper and silicon steel sheets are saved and the manufacturing cost of a motor can be reduced. In the structure, the levitation force and the torque are decoupled, a control method is simple and the levitation performance of the motor is good. The levitation control is realized by using a smallest inductance zone; the influence of levitation current on torque current is small; and the alternate coupling action is small. In addition, the bearingless switched reluctance motor has the characteristics of high utilization rate of the winding, high power density and strong high-speed adaptability.
Description
Technical field
The present invention relates to a kind of composite rotors structure bearing-free switch reluctance motor, belong to the magnetic suspension switched reluctance motor field of electric machinery.
Background technology
Bearing-free switch reluctance motor is a kind of novel magnetically levitated motor that grows up for 20 end of the centurys.The double winding bearing-free switch reluctance motor be will produce the suspending windings of suspending power and original regular tap reluctance motor winding together lap wound on the stator of motor, make it have simultaneously rotation and from suspending power by control double winding electric current, thereby realize the ultrahigh speed operation of motor.The simplex winding bearing-free switch reluctance motor then be by control one the cover winding current make its have simultaneously the rotation and from suspending power.The simplex winding bearing-free switch reluctance motor, because its stator only has a cover winding, structure is more simple, and control algolithm is simple, has become study hotspot and the development trend of bearing-free switch reluctance motor.
Double winding bearing-free switch reluctance motor no matter, or simplex winding bearing-free switch reluctance motor, exist close coupling between torque and the suspending power, and being difficult in control strategy and Mathematical Modeling to realize the full decoupled of the two, is one of bearing-free switch reluctance motor runnability principal element of being difficult to improve.In addition, because suspending power is controlled required, must carry out copped wave control to winding current, and during high-speed cruising, the surge of back electromotive force causes and can't follow the tracks of copped wave control to winding current, electric current namely can occur and cut phenomenon incessantly, this has affected the performance of bearing-free switch reluctance motor high speed performance greatly.
For solving above-mentioned two shortcomings of bearing-free switch reluctance motor, and based on the cost that reduces electric system, simplified control system, improve and optimize the angle of suspending power performance, the Korea S scholar has proposed the two-phase bearing-free switch reluctance motor of 8/10 and 12/14 structure, its characteristics are that suspending power and torque are produced separately by suspending windings and torque winding respectively, and motor is the two-phase duty, and the power density of motor is lower.
Summary of the invention
The present invention seeks to propose that a kind of simplex winding structure, suspending power and torque decoupler, high-speed adaptability are strong, the novel bearing-free switch reluctance motor of high power density.
The present invention adopts following technical scheme:
A kind of composite rotors structure bearing-free switch reluctance motor of the present invention comprises stator, torque rotor, suspending power rotor, winding; Be wound with a cover winding on the stator tooth of described stator; Rotor is comprised of torque rotor and suspending power rotor, and torque rotor and the stack of suspending power rotor axial are arranged in the stator; Torque rotor is for generation of torque, and the suspending power rotor is for generation of suspending power and part torque.
Composite rotors structure bearing-free switch reluctance motor of the present invention, described stator are that salient-pole structure and the number of teeth are 12.
Composite rotors structure bearing-free switch reluctance motor of the present invention, the rotor tooth number average of described torque rotor and suspending power rotor is 8.
Composite rotors structure bearing-free switch reluctance motor of the present invention, described winding configuration is centralized winding, every phase winding is comprised of the winding on four 90 ° of stators of being separated by, and four windings of every phase are independently controlled.
Composite rotors structure bearing-free switch reluctance motor of the present invention, the axial length of torque rotor and suspending power rotor is pressed actual torque and suspending power demand, and torque rotor is for generation of most of torque, the suspending power rotor is mainly for generation of suspending power, and the contribution part turns.
Beneficial effect
A kind of composite rotors structure bearing-free switch reluctance motor provided by the invention only has a winding on the stator tooth, with respect to traditional double winding bearing-free switch reluctance motor, simple in structure, copper factor is high, economizes copper and economizes silicon steel sheet, can reduce the motor manufacturing cost.Suspending power and torque decoupler on the structure, control method is simple, and the motor suspendability is good.Utilize the minimum inductance district to carry out the control that suspends, the suspension electric current is little on the impact of torque current, and the Coupling Between Phases effect is little.Winding utilization is high, and power density is high, and high-speed adaptability is strong.
Description of drawings
Fig. 1 is the three-dimensional structure cutaway view of composite rotors structure bearing-free switch reluctance motor of the present invention
Fig. 2 is the A phase winding schematic diagram of composite rotors structure bearing-free switch reluctance motor of the present invention.
Fig. 3 is the winding inductance of composite rotors structure bearing-free switch reluctance motor of the present invention and the change curve of electric current and rotor position angle.
1 is stator core among the figure, the 2nd, and torque rotor, the 3rd, suspending power rotor, the 4th, winding, the 5th, winding inductance, 6 suspension stages winding currents, the 7th, torque phase winding current.
Embodiment
The present invention is described in more detail below in conjunction with accompanying drawing;
As shown in Figure 1: a kind of composite rotors structure bearing-free switch reluctance motor comprises stator 1, torque rotor 2, suspending power rotor 3, winding 4; Be wound with a cover winding 4 on the stator tooth of stator 1; Rotor is comprised of torque rotor 2 and suspending power rotor 3, and torque rotor 2 axially superposes with suspending power rotor 3 and is arranged in the stator 1; Torque rotor 2 is for generation of torque, and suspending power rotor 3 is for generation of suspending power and part torque.
Described stator is that salient-pole structure and the number of teeth are 12.Torque rotor 2 is 8 with the rotor tooth number average of suspending power rotor 3; Winding 4 forms are centralized winding, and every phase winding is comprised of the winding on four 90 ° of stators of being separated by, and four windings of every phase are independently controlled.
The rotor tooth depth of torque rotor is larger, and salient pole nature is obvious, thus claim large field spider, for generation of most of torque; And another rotor (being the suspending power rotor) is mainly for generation of suspending power, and the torque of contribution small part, and the rotor tooth depth of suspension rotor is less, salient pole nature is not obvious, therefore claim little field spider, the rotor of little field spider is high relevant with gas length, and value is 2 ~ 5 times of gas lengths; As required, the suspending power rotor also can be divided into two, and is distributed in the axial both sides of torque rotor; Winding configuration adopts centralized winding, and every phase winding is comprised of the winding on four 90 ° of stators of being separated by, and 4 windings of every phase are independently controlled; By the electric current of control winding, the timesharing subregion produces suspending power and torque, and the two is decoupling zero structurally; Utilize minimum inductance flat-top district as the zone that produces suspending power, the suspension electric current is little on the torque current impact, and the Coupling Between Phases effect is little.The axial length of torque rotor and suspending power rotor is pressed actual torque and suspending power demand, and torque rotor is for generation of most of torque, and the suspending power rotor is mainly for generation of suspending power, and the contribution part turns.
Fig. 2 is the A phase winding schematic diagram of three-phase 12/8 utmost point composite rotors structure bearing-free switch reluctance motor.One phase winding is made of the coil that is distributed in 4 relative teeth, spatially is separated by each other 90 °, and the respectively independent control of these 4 windings, and the timesharing subregion produces suspending power and torque.4 windings of B, C phase are identical with A phase winding structure, only differ 30 ° and-30 ° with A in position.
Fig. 3 is the winding inductance of three-phase 12/8 utmost point composite rotors structure bearing-free switch reluctance motor and the change curve of electric current and rotor position angle.Definition stator tooth and rotor tooth aligned position are the zero degree position, are aligned position.For three-phase 12/8 utmost point bearing-free switch reluctance motor, a rotor cycle angle is 45 °, and then the interval of every phase winding generation suspending power is 15 °, the like this stable suspersion of guarantee motor operation.Owing to adopting torque and the subregional control strategy of suspending power timesharing, each needs the simultaneously conducting of two phase windings constantly, and a phase winding is with producing suspending power, and another phase winding produces torque.
The motor operation logic is described as example mutually take A, when rotor is positioned at [15 °, 30 °] time be suspension stages, this moment, the magnetic conductance of motor magnetic circuit was minimum, inductance value is minimum and constant, claims that this zone is minimum inductance flat-top district, and composite rotors structure bearing-free switch reluctance motor of the present invention is exactly to produce suspending power in this zone, and should not produce torque in the zone, realized torque and suspending power decoupling zero with this.Between the floating zone, when namely rotor was positioned at [15 °, 30 °], because the rotor tooth depth of suspending power rotor is very little with respect to torque rotor, and then the magnetic circuit reluctance of suspending power rotor portion was very little with respect to torque rotor; Again because suspending power and magnetic circuit reluctance are inversely proportional to, so the suspending power that torque rotor partly produces can ignore with respect to the suspending power rotor portion, provides the suspending power of motor suspension mainly to be produced by the suspending power rotor.Concrete suspending power control principle is: α direction suspending power is by winding current
i a1
With
i a3
Control, when
i a1
i a3
The time, α positive direction suspending power on the product, otherwise, α negative direction suspending power produced; In like manner, β direction suspending power is by winding current
i a2
With
i a4
Control, when
i a2
i a4
The time, β positive direction suspending power on the product, otherwise, β negative direction suspending power produced; α direction and β direction suspending power can synthesize the suspending power of any direction, therefore by 4 asymmetric excitations of winding, can produce the suspending power of any direction and size, and then realize the certainly suspension function of motor.In like manner, [0,15 °] and [30 °, 45 °] interval suspending power can be produced by B phase and C phase winding respectively, and then realizes the suspension operation in the whole rotor cycle.
Rotor is the electronic stage when being positioned at [30 °, 45 °], and this moment, inductance was in elevated areas, produced positive torque.When A suspends the excitation end mutually, because asymmetric excitation causes the size of current of 4 windings of A phase not wait, therefore the master power switch that needs identical driving signal controlling A phase winding, make first its quadruplet winding current identical, and then utilizing the current control method of switched reluctance machines to be controlled, concrete current control method adopts chopper current control or PWM control or mono pulse control etc.When inductance descends district's conducting, be generator operation, control strategy is identical with the electronic stage.
For those skilled in the art, can be easy to other advantage and distortion of association according to above implementation type.Therefore, the present invention is not limited to above-mentioned instantiation, and it carries out detailed, exemplary explanation as just example to a kind of form of the present invention.In the scope that does not deviate from aim of the present invention, those of ordinary skills replace resulting technical scheme according to above-mentioned instantiation by various being equal to, and all should be included within claim scope of the present invention and the equivalency range thereof.
Claims (4)
1. a composite rotors structure bearing-free switch reluctance motor is characterized in that: comprise stator (1), torque rotor (2), suspending power rotor (3), winding (4); Be wound with a cover winding (4) on the stator tooth of described stator (1); Rotor is comprised of torque rotor (2) and suspending power rotor (3), and torque rotor (2) axially superposes with suspending power rotor (3) and is arranged in the stator (1); Torque rotor (2) is for generation of torque, and suspending power rotor (3) is for generation of suspending power and part torque.
2. composite rotors structure bearing-free switch reluctance motor according to claim 1, it is characterized in that: described stator is that salient-pole structure and the number of teeth are 12.
3. composite rotors structure bearing-free switch reluctance motor according to claim 1 is characterized in that: described torque rotor (2) is 8 with the rotor tooth number average of suspending power rotor (3).
4. according to claim 1 and 2 or 3 described composite rotors structure bearing-free switch reluctance motors, it is characterized in that: described winding (4) form is centralized winding, every phase winding is comprised of the winding on four 90 ° of stators of being separated by, and four windings of every phase are independently controlled.
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| CN201310203348.6A CN103312103B (en) | 2013-05-28 | 2013-05-28 | A kind of composite rotors structure bearing-free switch reluctance motor |
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| CN201310203348.6A CN103312103B (en) | 2013-05-28 | 2013-05-28 | A kind of composite rotors structure bearing-free switch reluctance motor |
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| CN103312103A true CN103312103A (en) | 2013-09-18 |
| CN103312103B CN103312103B (en) | 2016-08-24 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780184A (en) * | 2014-01-17 | 2014-05-07 | 南京航空航天大学 | Direct torque and direct suspension force control method for 12/8-stage single winding switch reluctance machine without bearing |
| CN104009601A (en) * | 2014-05-27 | 2014-08-27 | 南京邮电大学 | Duplex-winding bearing-free switched reluctance motor of composite structure |
| CN104038002A (en) * | 2014-06-03 | 2014-09-10 | 南京邮电大学 | Permanent-magnet biased hybrid magnetic bearing switch reluctance motor |
| CN104377914A (en) * | 2014-10-08 | 2015-02-25 | 南京邮电大学 | Magnetic levitation switch reluctance motor of composite structure |
| CN104821698A (en) * | 2015-04-20 | 2015-08-05 | 江苏大学 | 12/6-pole hybrid rotor structure magnetic suspension switched reluctance generator and control method thereof |
| CN109923773A (en) * | 2016-09-22 | 2019-06-21 | 沃拉博股份有限公司 | Motor |
| CN113726036A (en) * | 2021-08-23 | 2021-11-30 | 南京航空航天大学 | 6N/4N pole three-phase electro-magnetic doubly salient motor with isolated windings |
| WO2022222478A1 (en) * | 2021-04-22 | 2022-10-27 | 东南大学 | Stator permanent magnet motor magnetic bearing having magnetic pole bypasses, and biasing force adjusting method therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727618B1 (en) * | 2002-06-10 | 2004-04-27 | The United States Of America, As Represented By The Administrator Of National Aeronautics And Space Administration | Bearingless switched reluctance motor |
-
2013
- 2013-05-28 CN CN201310203348.6A patent/CN103312103B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727618B1 (en) * | 2002-06-10 | 2004-04-27 | The United States Of America, As Represented By The Administrator Of National Aeronautics And Space Administration | Bearingless switched reluctance motor |
Non-Patent Citations (4)
| Title |
|---|
| BENJAMIN B.CHOI ET.AL: "A Bearing Switched-Reluctance Motor for High Specific Power Applications", 《NASA TECHNICAL REPORT SERVER (NTRS)》 * |
| 刘华: "改进型无轴承开关磁阻电动机", 《微特电机》 * |
| 曹鑫: "12/8极无轴承开关磁阻电动机", 《中国博士学位论文全文数据库工程科技II辑》 * |
| 项倩雯等: "单绕组磁悬浮开关磁阻电机的原理与解耦控制", 《电机与控制学报》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780184A (en) * | 2014-01-17 | 2014-05-07 | 南京航空航天大学 | Direct torque and direct suspension force control method for 12/8-stage single winding switch reluctance machine without bearing |
| CN104009601A (en) * | 2014-05-27 | 2014-08-27 | 南京邮电大学 | Duplex-winding bearing-free switched reluctance motor of composite structure |
| CN104009601B (en) * | 2014-05-27 | 2016-02-10 | 南京邮电大学 | A kind of composite construction double winding bearing-free switch reluctance motor |
| CN104038002A (en) * | 2014-06-03 | 2014-09-10 | 南京邮电大学 | Permanent-magnet biased hybrid magnetic bearing switch reluctance motor |
| CN104377914A (en) * | 2014-10-08 | 2015-02-25 | 南京邮电大学 | Magnetic levitation switch reluctance motor of composite structure |
| CN104821698A (en) * | 2015-04-20 | 2015-08-05 | 江苏大学 | 12/6-pole hybrid rotor structure magnetic suspension switched reluctance generator and control method thereof |
| CN104821698B (en) * | 2015-04-20 | 2018-06-26 | 江苏大学 | A kind of 12/6 pole mixed rotor structure bearingless switched reluctance generator and its control method |
| CN109923773A (en) * | 2016-09-22 | 2019-06-21 | 沃拉博股份有限公司 | Motor |
| WO2022222478A1 (en) * | 2021-04-22 | 2022-10-27 | 东南大学 | Stator permanent magnet motor magnetic bearing having magnetic pole bypasses, and biasing force adjusting method therefor |
| US11536315B2 (en) | 2021-04-22 | 2022-12-27 | Southeast University | Magnetic bearing of stator permanent magnet motor with magnetic pole bypasses and bias force adjusting method thereof |
| CN113726036A (en) * | 2021-08-23 | 2021-11-30 | 南京航空航天大学 | 6N/4N pole three-phase electro-magnetic doubly salient motor with isolated windings |
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| CN103312103B (en) | 2016-08-24 |
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