CN105914929A - Dual-winding bearingless switched reluctance motor and control method thereof - Google Patents
Dual-winding bearingless switched reluctance motor and control method thereof Download PDFInfo
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- CN105914929A CN105914929A CN201610256632.3A CN201610256632A CN105914929A CN 105914929 A CN105914929 A CN 105914929A CN 201610256632 A CN201610256632 A CN 201610256632A CN 105914929 A CN105914929 A CN 105914929A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N15/00—Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention discloses a dual-winding bearingless switched reluctance motor and a control method thereof. The motor comprises a stator having 12 tooth poles and a rotor having 4 tooth poles. The rotor has no winding. Main windings and auxiliary windings are wound on each stator tooth pole. The stator tooth poles of the same phase are separated by two stator tooth poles of other phase. The main windings of the stator tooth poles of the same phase are connected in series in turn. The auxiliary windings of each stator tooth pole and the auxiliary windings of the radially opposite stator tooth poles are reversely connected in series. Current of the main windings is unidirectionally conducted. Current of the auxiliary windings is bidirectionally conducted. Each rotor tooth pole is wider than the stator tooth pole for 30 degrees. Each phase of electric inductor has a maximum inductance flat area of 1/3 period so that decoupling of motor suspension force and torque on the mechanism of production is realized, the control algorithm is simplified, and more stable control of instantaneous suspension force can be realized.
Description
Technical field
The invention belongs to bearing-free switch reluctance motor technical field, particularly to a kind of double winding bearing-free switch reluctance motor and control method thereof.
Background technology
Switched reluctance machines has the features such as simple in construction, reliable operation, low cost, high temperature resistant, high fault tolerance and high-speed adaptability, has obtained applying widely in Aero-Space, military affairs, the field such as civilian.While realizing suspension operation, volume and weight greatly reduces, and improves power density to integrate the bearing-free switch reluctance motor (hereinafter referred to as BSRM) of magnetic bearing and electric motors function.Owing to integrating the dual-use function rotating and suspending, the high-speed adaptability of BSRM is further enhanced, and has more preferable application advantage in Aero-Space and military field.Compared to simplex winding structure, using double winding to produce torque and suspending power, power demand device is reduced simultaneously, and auxiliary winding power device capacitance reduces, reduce cost, reduce the volume of a whole set of controller, improve efficiency and the control to suspending power is more flexible.
For traditional 12/8 the most double (singly) winding BSRM, there is coupling in its suspending power and torque in mechanism of production.In order to improve the runnability of motor, required control algolithm is considerably complicated.Additionally, after motor speed rises to a certain degree, due to transformer EMF and the double drive of motion electromotive force, exciting current will not decline with the shutoff of main switch, the phenomenon that copped wave was lost efficacy occurs, thus affect suspending power control effect in real time, the suspension unstability of bearing-free motor will be caused time serious.
Summary of the invention
In order to solve the technical problem that above-mentioned background technology proposes, it is desirable to provide a kind of double winding bearing-free switch reluctance motor and control method thereof, realize motor suspending power and the torque decoupling in mechanism of production, simplify control algolithm, and reduce the impact that exciting current is controlled by motion electromotive force, it is achieved the control more stable to instantaneous suspending power.
In order to realize above-mentioned technical purpose, the technical scheme is that
A kind of double winding bearing-free switch reluctance motor, stator and the rotor of 4 tooth poles including 12 tooth poles, without winding on rotor, the tooth of each stator is extremely gone up and is all wound with main winding and auxiliary winding, across the stator tooth pole of two other phases between same phase stator tooth pole, the main winding of same phase stator tooth pole is sequentially connected in series, auxiliary winding that each stator tooth is extremely gone up and the auxiliary winding differential concatenation that extremely goes up of stator tooth the most diametrically, the electric current one-way conduction of main winding, the electric current two-way admittance of auxiliary winding, the tooth the widest certain angle α of the tooth ultimate ratio stator of rotor, and angle [alpha] >=30 °.
Preferred version based on technique scheme, angle [alpha]=30 °.
Preferred version based on technique scheme, the circuit topology of main winding power inverter uses asymmetry half-bridge circuit, the circuit topology of auxiliary winding power changer to use three-phase half-bridge circuit.
The present invention should include the control method of above-mentioned double winding bearing-free switch reluctance motor, when motor is in electric operation, according to rotor position angle, selecting the most biphase simultaneously turning on, wherein a phase is in inductance rising area, and this phase main winding excitation produces motor torque, another phase is in inductance flat-top district simultaneously, the main winding of this phase provides bias magnetic field, thus produces suspending power, and the auxiliary winding energising of this phase constitutes asymmetric excitation；When motor is in generator operation, according to the anglec of rotation, selecting wherein one to be conducted, this phase is in inductance flat-top district, and the main winding of this phase provides bias magnetic field, thus produce suspending power, the auxiliary winding energising of this phase constitutes asymmetric excitation, and provides excitation for power generating stage subsequently, until this phase enters inductance and declines district, turning off this phase main winding and the switching tube of auxiliary winding, this phase enters afterflow power generating stage.
Preferred version based on technique scheme, the current control method of motor uses Current cut control method or PWM control method or mono pulse control method.
The beneficial effect that employing technique scheme is brought:
(1) present invention is the widest 30 ° by the rotor tooth ultimate ratio stator tooth of structure motor so that every phase inductance exists the maximum induction flat-top district in 1/3 cycle, thus realizes motor suspending power and torque decoupling in mechanism of production, simplifies control algolithm；
(2) due to the fact that auxiliary winding current is less, switching tube closes has no progeny, and electric current is dropped rapidly to 0, and each main winding current is consistent, it is to avoid the imbalance of each generating winding current in generating is interval, so that the control effect of suspending power is more stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the analogous diagram of motor three-phase self-induction of the present invention distribution.
Detailed description of the invention
Below with reference to accompanying drawing, technical scheme is described in detail.
The structural representation of the present invention as shown in Figure 1, a kind of double winding bearing-free switch reluctance motor (regulation be counterclockwise rotating square to), stator and the rotor of 4 tooth poles including 12 tooth poles, without winding on rotor, the tooth of each stator is extremely gone up and is all wound with main winding and auxiliary winding, across the stator tooth pole of two other phases between same phase stator tooth pole, the main winding of same phase stator tooth pole is sequentially connected in series, auxiliary winding that each stator tooth is extremely gone up and the auxiliary winding differential concatenation that extremely goes up of stator tooth the most diametrically, the widest α of tooth of the tooth ultimate ratio stator of each rotor, α >=30 °, every phase inductance is made to there is the maximum induction flat-top district in 1/3 cycle, thus realize motor suspending power and torque decoupling in mechanism of production.In the present embodiment, the optimal value of α is 30 °, and α can increase inductance flat-top district more than 30 ° and not affect torque effective coverage, but is detrimental to the decline of electric current, affects suspension effect.
The electric current one-way conduction of every phase main winding, therefore may select the asymmetry half-bridge circuit circuit topology as main winding power inverter.Two set auxiliary winding differential concatenations diametrically, electric current two-way admittance, therefore may select the three-phase half-bridge circuit circuit topology as auxiliary winding power changer.
The invention allows for the control method of above-mentioned double winding bearing-free switch reluctance motor, definition axis, stator tooth pole is corner zero degree position with rotor teeth groove axis aligned position.When motor is in electric operation, the anglec of rotationθIn ∈ [0,30 °] (i.e. I district in Fig. 2), now A phase is in inductance rising area, open A phase main winding switching tube, thus producing motor torque, concrete current control method can use the control method of tradition SRM, controls and mono pulse control including Current cut control, PWM.C phase is in inductance flat-top district simultaneously, the main winding of C phase the bias magnetic field produced provides suspending power, and the auxiliary winding energising of C phase constitutes asymmetric excitation.In the anglec of rotationθ∈ [30 °, 60 °] interior (Ji Tu2Zhong II district), A phase is in inductance flat-top district, therefore the bias magnetic field produced by the main winding of C phase provides suspending power, the auxiliary winding energising of C phase constitutes asymmetric excitation, torque now is then produced by the main winding excitation of B phase, hence into the excitation cycle of B phase.Therefore, when electric operation, the excitation phase sequence of winding is AB-BC-CA.
When motor is in generator operation,θIn ∈ [30 °, 60 °] (Tu2Zhong II district), now A phase is in inductance flat-top district, the main winding of A phase provide bias magnetic field, and the auxiliary winding energising of A phase constitutes asymmetric excitation, provides excitation for power generating stage subsequently simultaneously；WhenθWhen=60 °, A phase enters inductance and declines district, turns off A phase main winding and the switch of auxiliary winding, and A phase enters afterflow power generating stage, and B phase enters inductance flat-top district simultaneously, to produce the radial force making rotor suspension, provides excitation for its power generating stage subsequently simultaneously.Therefore, when generator operation, the excitation phase sequence of winding is A-B-C.
Owing in the unsymmetry of interval exciting current that suspends, will cause the uneven distribution of generation current, this will increase the difficulty that suspending power controls.And less due to auxiliary winding current in the present invention, switching tube closes has no progeny, and electric current is dropped rapidly to 0, and main winding current is consistent, it is to avoid the imbalance of each generating winding current in generating is interval, can more stably suspend.
Structure based on 12/4 pole double winding BSRM and principle, it can be deduced that the main cause that " structure inductance flat-top district " is motor suspending power and torque is effectively decoupled in mechanism of production.Therefore by designing certain stator and rotor tooth pole overlap width, the decoupling of bearing-free switch reluctance motor suspending power and torque can all be realized, such as 16/4 electrode structure.
Above example is only the technological thought that the present invention is described, it is impossible to limiting protection scope of the present invention with this, every technological thought proposed according to the present invention, any change done on the basis of technical scheme, within each falling within scope.
Claims (5)
1. a double winding bearing-free switch reluctance motor, it is characterized in that: include stator and the rotor of 4 tooth poles of 12 tooth poles, without winding on rotor, the tooth of each stator is extremely gone up and is all wound with main winding and auxiliary winding, across the stator tooth pole of two other phases between same phase stator tooth pole, the main winding of same phase stator tooth pole is sequentially connected in series, auxiliary winding that each stator tooth is extremely gone up and the auxiliary winding differential concatenation that extremely goes up of stator tooth the most diametrically, the electric current one-way conduction of main winding, the electric current two-way admittance of auxiliary winding, the tooth the widest certain angle α of the tooth ultimate ratio stator of rotor, and angle [alpha] >=30 °.
A kind of double winding bearing-free switch reluctance motor, it is characterised in that: described angle [alpha]=30 °.
A kind of double winding bearing-free switch reluctance motor, it is characterised in that: the circuit topology of main winding power inverter uses asymmetry half-bridge circuit, the circuit topology of auxiliary winding power changer to use three-phase half-bridge circuit.
4. the control method of double winding bearing-free switch reluctance motor as claimed in claim 1, it is characterized in that: when motor is in electric operation, according to rotor position angle, selecting the most biphase simultaneously turning on, wherein a phase is in inductance rising area, and this phase main winding excitation produces motor torque, another phase is in inductance flat-top district simultaneously, the main winding of this phase provides bias magnetic field, thus produces suspending power, and the auxiliary winding energising of this phase constitutes asymmetric excitation；When motor is in generator operation, according to the anglec of rotation, selecting wherein one to be conducted, this phase is in inductance flat-top district, and the main winding of this phase provides bias magnetic field, thus produce suspending power, the auxiliary winding energising of this phase constitutes asymmetric excitation, and provides excitation for power generating stage subsequently, until this phase enters inductance and declines district, turning off this phase main winding and the switching tube of auxiliary winding, this phase enters afterflow power generating stage.
Control method the most according to claim 4, it is characterised in that: the current control method of motor uses Current cut control method or PWM control method or mono pulse control method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610256632.3A CN105914929A (en) | 2016-04-22 | 2016-04-22 | Dual-winding bearingless switched reluctance motor and control method thereof |
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| CN201610256632.3A CN105914929A (en) | 2016-04-22 | 2016-04-22 | Dual-winding bearingless switched reluctance motor and control method thereof |
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| CN105914929A true CN105914929A (en) | 2016-08-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667384A (en) * | 2018-06-06 | 2018-10-16 | 中国计量大学 | Double transformation double winding high-gain alternating-current switch reluctance motor converters are encouraged by force in self-charging |
| CN110445336A (en) * | 2019-08-20 | 2019-11-12 | 黄向阳 | A kind of permasyn morot method of winding stator that can be generated electricity |
Citations (5)
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| CN1710782A (en) * | 2005-05-27 | 2005-12-21 | 南京航空航天大学 | Bearing-free switch magnetic-resistance starting generator and control method |
| CN101546947A (en) * | 2009-05-05 | 2009-09-30 | 南京航空航天大学 | Bearing-free switch reluctance motor and control method thereof |
| CN202565044U (en) * | 2012-05-21 | 2012-11-28 | 南京信息工程大学 | Stator permanent magnet bearingless motor |
| CN103296847A (en) * | 2013-05-15 | 2013-09-11 | 南京邮电大学 | Bearingless switched reluctance motor and control method thereof |
| CN103337938A (en) * | 2013-06-20 | 2013-10-02 | 南京航空航天大学 | 12/4 pole single winding bearingless switch reluctance motor and control method thereof |
-
2016
- 2016-04-22 CN CN201610256632.3A patent/CN105914929A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710782A (en) * | 2005-05-27 | 2005-12-21 | 南京航空航天大学 | Bearing-free switch magnetic-resistance starting generator and control method |
| CN101546947A (en) * | 2009-05-05 | 2009-09-30 | 南京航空航天大学 | Bearing-free switch reluctance motor and control method thereof |
| CN202565044U (en) * | 2012-05-21 | 2012-11-28 | 南京信息工程大学 | Stator permanent magnet bearingless motor |
| CN103296847A (en) * | 2013-05-15 | 2013-09-11 | 南京邮电大学 | Bearingless switched reluctance motor and control method thereof |
| CN103337938A (en) * | 2013-06-20 | 2013-10-02 | 南京航空航天大学 | 12/4 pole single winding bearingless switch reluctance motor and control method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667384A (en) * | 2018-06-06 | 2018-10-16 | 中国计量大学 | Double transformation double winding high-gain alternating-current switch reluctance motor converters are encouraged by force in self-charging |
| CN108667384B (en) * | 2018-06-06 | 2019-09-06 | 中国计量大学 | Self-charging Qiang Lishuan transformation double winding high-gain alternating-current switch reluctance motor converter |
| CN110445336A (en) * | 2019-08-20 | 2019-11-12 | 黄向阳 | A kind of permasyn morot method of winding stator that can be generated electricity |
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Application publication date: 20160831 |