CN105305757A - Double cross hybrid excitation motor - Google Patents
Double cross hybrid excitation motor Download PDFInfo
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- CN105305757A CN105305757A CN201510850427.5A CN201510850427A CN105305757A CN 105305757 A CN105305757 A CN 105305757A CN 201510850427 A CN201510850427 A CN 201510850427A CN 105305757 A CN105305757 A CN 105305757A
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Abstract
The invention discloses a double cross hybrid excitation motor including a front end cover, a rear end cover and a motor shell. A rotor yoke is arranged on a rotation shaft. A permanent magnetic N pole, a permanent magnetic S pole and an iron pole are fixed on the rotor yoke. An armature iron core and an excitation iron core are arranged on the motor shell uniformly. An AC armature winding is disposed on the armature iron core. An AC excitation winding is disposed on the excitation iron core. The rotation shaft, the rotor yoke, the permanent magnetic N pole, the permanent magnetic S pole and the iron pole form the rotor. The AC armature winding, the armature iron core, the AC excitation winding, the excitation iron core and the motor shell form the stator. The motor uses an AC current to regulate air gap magnetic flux; excitation magnetic motive force and armature magnetic motive force are connected in parallel; the size of induced electromotive force is changed by regulating the magnetic flux distribution; thus bidirectional symmetrical magnetic adjustment can be achieved, and the danger of magnetic steel demagnetization can be avoided. The motor can provide constant-voltage power supply on a variable-speed application occasion and can achieve wider speed regulating range than common hybrid excitation motors on a variable-speed electric occasion.
Description
Technical field
The present invention relates to the technical field of mixed excitation electric machine, be specifically related to the wrong mixed excitation electric machine of a kind of double cross.
Background technology
The rare earth permanent-magnetic material magnetic energy products such as neodymium iron boron are higher, make air-gap field in magneto be difficult to regulate.General magneto adopts vector control technology, regulates magnetic flux by regulating stator direct-axis current.But d-axis demagnetizing current likely makes permanent magnet generation irreversible demagnetization, reduces the reliability of motor.Reasonable change permanent magnet motor structure, introduce auxiliary electrical magnetic part winding, the mixed excitation electric machine realizing air-gap field flexible becomes the effective way addressed this problem.
The sorting technique of mixed excitation electric machine has a lot, can be divided into rotor permanent magnet type and stator permanent magnetic type by permanent magnet riding position; Tandem type, parallel connection type and hybrid type can be divided into by permanent magnetism and electric excitation two kinds of excitation source correlations; Rotary and orthoscopic can be divided into by the motion mode of rotor (mover); DC excitation type and AC excitation type can be divided into by air-gap field regulative mode.
Existing mixed excitation electric machine adopts DC excitation mode mostly, the main thought of its flux control is: when passing into the exciting current of a direction in DC excitation winding, if make the same polarity of iron pole and permanent-magnet pole of extremely descending contrary, then the average magnetic of air gap is close weakens, and plays the effect of weak magnetic.If change exciting current direction, then same iron pole of extremely descending is identical with the polarity of permanent-magnet pole, the close enhancing of the average magnetic of air gap, plays the effect increasing magnetic.As shown in Figure 1, when adopting DC excitation, electric excitation magnetic kinetic potential
f f phase place can not flexible; Electricity excitation magnetic kinetic potential during weak magnetic
f f with permanent-magnet magnetic kinetic potential
f pm antiphase, electricity excitation magnetic kinetic potential during increasing magnetic
f f with permanent-magnet magnetic kinetic potential
f pm same-phase; Work as armature magnetomotive force
f a when changing, synthesis magnetomotive force
f 0also change thereupon, but all the time not with electric excitation magnetic kinetic potential
f f same-phase or antiphase.Increase magnetic by comparing, air gap synthesis magnetomotive force can find relative to the variable quantity without unloaded magnetomotive force amplitude during excitation in weak magnetic two kinds of situations, the weak magnetic of DC excitation mixed excitation electric machine is limited in one's ability, increasing magnetic and weak magnetic adjustable range asymmetric.
Authorization Notice No. is the Chinese invention patent of CN102005879B, proposes a kind of mixed excitation synchronous generator adopting interchange adjustable magnetic.This motor is two-stage structure, and one section is magneto, and another section is brush-less electrically exciting synchronous machine, and two parts are axially being arranged in juxtaposition, independent of one another on magnetic circuit.This motor two parts stator core shares a set of stator armature winding, all flows through alternating current in armature winding and electric excitation winding, regulates the size of exciting current and phase-adjustable to save size and the phase place of electric excitation induced potential in armature winding.Be series relationship at power on excitation magnetic kinetic potential and armature magnetomotive force of magnetic circuit, be similar to transformer primary, vice-side winding between electric excitation winding and armature winding, during weak magnetic, some armature magnetomotive force can be cancelled, and does not play the effectiveness of armature magnetomotive force completely.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the wrong mixed excitation electric machine of a kind of double cross, motor gas-gap magnetic field can be regulated simply, flexibly, economically, change coil-induced electromotive force, permanent magnet can be avoided to produce irreversible demagnetization, have bi-directional symmetrical adjustable magnetic ability, electric excitation magnetic kinetic potential and armature magnetomotive force are parallel relationship.
In order to achieve the above object, technical scheme of the present invention is: the wrong mixed excitation electric machine of a kind of double cross, comprise front end housing, rear end cap and casing, the middle part of front end housing, rear end cap is provided with rotating shaft, described rotating shaft is provided with rotor yoke, rotor yoke is fixed with permanent magnetism N pole, permanent magnetism S pole and iron pole, described casing is evenly provided with armature core and field core, armature core is provided with interchange armature winding, and field core is provided with AC excitation winding; Described rotating shaft, rotor yoke, permanent magnetism N pole, permanent magnetism S pole and iron pole form rotor; Exchange armature winding, armature core, AC excitation winding, field core and casing and form stator.
Described motor is divided into N pole edge regions and S pole edge regions along rotor shaft direction; Rotor portion and stationary part is all comprised in described N pole edge regions and S pole edge regions; Described N pole edge regions rotor portion is along the circumferential direction staggered by permanent magnetism N pole and iron pole and forms, and aligns along machine shaft direction in the adjacent iron pole in permanent magnetism N pole and S pole edge regions; Described S pole edge regions rotor portion is along the circumferential direction staggered by permanent magnetism S pole and iron pole and forms, and aligns along machine shaft direction with the adjacent iron pole in the edge regions of N pole in permanent magnetism S pole.
Described interchange armature winding and AC excitation winding composition stator winding, armature winding is exchanged and AC excitation winding is along the circumferential direction staggered in the edge regions of N pole, in the edge regions of S pole, exchange armature winding and excitation winding is along the circumferential direction staggered, armature core and field core align along machine shaft direction.
Described N pole edge regions and S pole edge regions are isometric, and the equal and opposite in direction of described permanent magnetism N pole, permanent magnetism S pole and iron pole, described interchange armature winding and AC excitation winding are symmetric winding.
The number of described iron pole equals the number of poles of motor, and the number of permanent magnetism N pole and permanent magnetism S pole equals the number of pole-pairs of motor.
Described N pole edge regions number of stator slots is equal with number of slots with S pole edge regions number of stator slots, and number of slots is the even-multiple of number of motor phases.
Described front end housing is connected with rotating shaft by bearing with the middle part of rear end cap; Front end housing is connected with casing with the end of rear end cap.
The rear end of described rotating shaft is provided with fan, and fan outer end is provided with fan guard, and fan guard is fixed on casing.
The present invention compared with prior art, has following characteristics:
1. the present invention adopts AC excitation to regulate air-gap field, realizes the control to magnetic field by the size and phase place controlling three-phase (or heterogeneous) symmetrical exciting current.
2. when exchanging adjustable magnetic, the present invention's electricity excitation magnetic kinetic potential
f f with synthesis magnetomotive force
f 0same-phase or antiphase, increase magnetic scope and weak magnetic scope is symmetrical, and adjustable magnetic performance is good.
3. stator armature iron core of the present invention and field core share winding, electric excitation winding and armature winding separate, be parallel relationship at power on excitation magnetic kinetic potential and armature magnetomotive force of magnetic circuit.
4. armature winding of the present invention and AC excitation winding are all three-phase (or heterogeneous) symmetric windings, and the two number of phases is identical, can be distributed winding or concentratred winding.
5. the present invention regulates what change during exciting current to be the distribution of three-dimensional magnetic field in motor, extremely descends for a pair resultant flux to change, and constant all the time through the flow direction of permanent magnet, and permanent magnet can not be caused to demagnetize, and the reliability of motor is high.
6. the wrong mixed excitation electric machine of double cross of the present invention both can be used as generator provides constant voltage source in variable speed generation application scenario, can be used as again motor and realizes the Constant-power speed range broader than general mixed excitation electric machine.
7. the present invention is by the design of stator armature winding, excitation winding distribution form and permanent-magnet pole and iron pole, can obtain high-quality generator output voltage or motor load characteristic.
Accompanying drawing explanation
Fig. 1 is the mixed excitation electric machine magnetomotive force three dimensional vector diagram adopting DC excitation; Wherein, (a) is weak magnetic vector figure, and (b) increases magnetic vector figure.
Fig. 2 is the rotor structure schematic diagram of the present invention a pair pole.
Fig. 3 is the wrong mixed excitation electric machine schematic cross-section of the present invention 6 groove 2 pole concentratred winding double cross.
Fig. 4 is the wrong mixed excitation electric machine cutaway view of the present invention 6 groove 2 pole concentratred winding double cross, and wherein, (a) is A-A cutaway view, and (b) is B-B cutaway view.
Fig. 5 is double cross of the present invention wrong mixed excitation electric machine magnetomotive force three dimensional vector diagram, and wherein, (a) is weak magnetic vector figure, and figure (b) increases magnetic vector figure.
Fig. 6 is double cross of the present invention wrong mixed excitation electric machine rotor flux spatial distribution map, and wherein, (a) is without distribution situation during excitation, distribution situation when (b) is weak magnetic, and (c) is distribution situation when increasing magnetic.
Embodiment
The present invention is specifically described below by drawings and Examples.
The wrong mixed excitation electric machine of a kind of double cross, as shown in Figure 2, Figure 3 and Figure 4, comprise front end housing 3, rear end cap 4 and casing 8, casing 8 is arranged between front end housing 3 and rear end cap 4, and casing 8 is made up of permeability magnetic material.The middle part of front end housing 3, rear end cap 4 is provided with rotating shaft 1, and front end housing 3 is connected with rotating shaft 1 by bearing 2 with the middle part of rear end cap 4, arranges bearing 2 and facilitates rotating shaft 1 to rotate relative to front end housing 3 and rear end cap 4.Front end housing 3 is connected with casing 8 with the end of rear end cap 4.The rear end of rotating shaft 1 is provided with fan 7, and fan 7 is symmetrical about rotating shaft 1, and rotating shaft 1 can drive fan 7 to rotate, and is conducive to evacuating the heat in casing 8.Fan 7 outer end is provided with fan guard 5, and fan guard 5 is fixed on casing 8.
Rotor yoke 6 is cylindrical high magnetic conduction sleeve, and rotating shaft 1, through rotor yoke 6, rotor yoke 6 is fixed with permanent magnetism N pole 13, permanent magnetism S pole 15 and iron pole 14.Casing 8 is evenly provided with armature core 9 and field core 10, armature core 9 is provided with and exchanges armature winding 11, and field core 10 is provided with AC excitation winding 12.Rotating shaft 1, rotor yoke 6, permanent magnetism N pole 13, permanent magnetism S pole 15 and iron pole 14 form rotor.Exchange armature winding 11, armature core 9, AC excitation winding 12, field core 10 and casing 8 and form stator.
Motor is divided into N pole edge regions 17 and edge regions 16, N pole, S pole edge regions 17 and S pole edge regions 16 along rotating shaft 1 direction be isometric, and N pole edge regions 17 and S pole edge regions 16 all comprise rotor portion and stationary part.Rotor and stator all adopt cross structure.
N pole edge regions 17 rotor portion comprises permanent magnetism N pole 13 and iron pole 14, and permanent magnetism N pole 13 and iron pole 14 are along the circumferential direction staggered, and aligns along machine shaft 1 direction with iron pole 14 adjacent in S pole edge regions 16 in permanent magnetism N pole 13.S pole edge regions 16 rotor portion is along the circumferential direction staggered by permanent magnetism S pole 15 and iron pole 14 and forms, and aligns along machine shaft 1 direction with iron pole 14 adjacent in N pole edge regions 17 in permanent magnetism S pole 15.
Permanent magnetism N pole 13, permanent magnetism S pole 15 are permanent magnet.The number of iron pole 14 equals the number of poles of motor, and the number of permanent magnetism N pole 13 and permanent magnetism S pole 15 equals the number of pole-pairs of motor.The equal and opposite in direction of permanent magnetism N pole 13, permanent magnetism S pole 15 and iron pole 14.Permanent magnetism N pole 13, permanent magnetism S pole 15 and between iron pole 14 and rotating shaft 1, have a high flux sleeve cylinder to form rotor yoke 6, for the axial magnetic conduction of rotor.
For ensureing that armature field and excitation field are circular rotating field, armature winding and excitation winding must be ensured circumferentially with axially symmetrical in winding phase process.Adopt staggered split-phase method in the present invention, every phase winding some be positioned at N pole edge regions 17, another part is positioned at S pole edge regions 16, makes interchange armature winding 11 and AC excitation winding 12 be all symmetric windings, produces circular rotating field when flowing through symmetrical alternating current electricity.
N pole edge regions 17 stationary part all comprises with S pole edge regions 16 stationary part and exchanges armature winding 11, armature core 9, AC excitation winding 12 and field core 10.Interchange armature winding 11 in N pole edge regions 17 and AC excitation winding 12 are circumferentially staggeredly placed, interchange armature winding 11 in S pole edge regions 16 and AC excitation winding 12 are circumferentially staggeredly placed, armature core 9 in N pole edge regions 17 aligns along machine shaft 1 direction with the field core 10 in S pole edge regions 16, and the field core 10 in N pole edge regions 17 aligns along machine shaft 1 direction with the armature core 9 in S pole edge regions 16.Interchange armature winding 11 and AC excitation winding 12 are symmetric winding.Armature core 9 and field core 10 measure-alike.N pole edge regions 17 groove number is equal with number of slots with S pole edge regions 16 groove number, and the groove number of N pole edge regions 17 groove number and S pole edge regions 16 is the even-multiple of number of motor phases.
It is double cross of the present invention wrong mixed excitation electric machine magnetomotive force three dimensional vector diagram shown in Fig. 5.In figure
f f for excitation magnetic kinetic potential,
f pm for permanent-magnet magnetic kinetic potential,
f a for armature magnetomotive force,
f 0for
f pm with
f a synthesis magnetomotive force.Excitation magnetic kinetic potential is produced when flowing through exciting current in AC excitation winding 12
f f , excitation magnetic kinetic potential
f f space with
f a ,
f pm with
f 0synchronous rotary.The present invention adopts AC excitation electric current flexible electricity excitation magnetic kinetic potential
f f , make it along with synthesis magnetomotive force
f 0real-time change; Electric excitation magnetic kinetic potential is controlled by regulating the phase place of AC excitation electric current
f f phase place (with synthesis magnetomotive force
f 0same-phase or antiphase) to change the distribution of air gap three-dimensional magnetic field in motor, change with the useful flux of armature winding interlinkage, to reach the object regulating magnetic field and induced electromotive force thereupon; By regulating the magnetomotive size of electric excitation, control the amplitude of air gap resultant magnetic field.
The polarity of the permanent magnet in N pole edge regions 17 is N pole, and the polarity of the permanent magnet in S pole edge regions 16 is S pole.During weak magnetic, by regulating the phase place of electric current in AC excitation winding 12, make electric excitation magnetic kinetic potential
f f with synthesis magnetomotive force
f 0antiphase, then the iron pole 14 of N pole edge regions 17 is sensed as N pole, the iron pole 14 of S pole edge regions 16 is sensed as S pole, the anti-phase series connection of induced potential that two conductor limits of armature winding 11 coil produce, cancel out each other, armature winding induced potential reduces, and reaches conventional motor reduces winding induced potential object by weak magnetic.When increasing magnetic, if regulate the phase place of electric current in AC excitation winding 12, make electric excitation magnetic kinetic potential
f f with synthesis magnetomotive force
f 0same-phase, then the iron pole 14 of N pole edge regions 17 is sensed as S pole, the iron pole 14 of S pole edge regions 16 is sensed as N pole, the induced potential that two conductor limits of armature winding 11 coil produce is along being in series, numerical value is added, armature winding induced potential increases, and reaches conventional motor increases winding induced potential object by increasing magnetic.
The present invention adopts the distribution of AC excitation Current adjustment air-gap flux, to change the size of induced potential, can realize bi-directional symmetrical adjustable magnetic.Due to excitation magnetic kinetic potential
f f with armature magnetomotive force
f a magnetic circuit belongs to parallel relationship, regulates what change during exciting current to be the distribution of three-dimensional magnetic field in motor, extremely descend for a pair resultant flux to change, and the flow direction passing permanent magnet is constant all the time, avoids the danger of magnet steel degaussing.The present invention can provide constant voltage source in variable speed generation application scenario, can realize the speed adjustable range broader than general mixed excitation electric machine in variable speed power occasion.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (9)
1. the wrong mixed excitation electric machine of double cross, comprise front end housing (3), rear end cap (4) and casing (8), front end housing (3), the middle part of rear end cap (4) is provided with rotating shaft (1), it is characterized in that, described rotating shaft (1) is provided with rotor yoke (6), rotor yoke (6) is fixed with permanent magnetism N pole (13), permanent magnetism S pole (15) and iron pole (14), described casing (8) is evenly provided with armature core (9) and field core (10), armature core (9) is provided with and exchanges armature winding (11), field core (10) is provided with AC excitation winding (12), described rotating shaft (1), rotor yoke (6), permanent magnetism N pole (13), permanent magnetism S pole (15) and iron pole (14) formation rotor, exchange armature winding (11), armature core (9), AC excitation winding (12), field core (10) and casing (8) and form stator.
2. the wrong mixed excitation electric machine of double cross according to claim 1, it is characterized in that, motor is divided into N pole edge regions (17) and S pole edge regions (16) along rotating shaft (1) direction; Rotor portion and stationary part is all comprised in described N pole edge regions (17) and S pole edge regions (16).
3. the wrong mixed excitation electric machine of double cross according to claim 2, it is characterized in that, described N pole edge regions (17) rotor portion is along the circumferential direction staggered by permanent magnetism N pole (13) and iron pole (14) and forms, and aligns along rotating shaft (1) direction with iron pole (14) adjacent in S pole edge regions (16) in permanent magnetism N pole (13); Described S pole edge regions (16) rotor portion is along the circumferential direction staggered by permanent magnetism S pole (15) and iron pole (14) and forms, and aligns along rotating shaft (1) direction with iron pole (14) adjacent in N pole edge regions (17) in permanent magnetism S pole (15).
4. the wrong mixed excitation electric machine of double cross according to claim 1, it is characterized in that, described interchange armature winding (11) and AC excitation winding (12) composition stator winding, in N pole edge regions (17), interchange armature winding (11) and AC excitation winding (12) are along the circumferential direction staggered, in S pole edge regions (16), interchange armature winding (11) and excitation winding (12) are along the circumferential direction staggered, and armature core (9) and field core (10) align along rotating shaft (1) direction.
5. the wrong mixed excitation electric machine of double cross according to claim 2, it is characterized in that, described N pole edge regions (17) and S pole edge regions (16) are isometric, the equal and opposite in direction of described permanent magnetism N pole (13), permanent magnetism S pole (15) and iron pole (14), described interchange armature winding (11) and AC excitation winding (12) are symmetric winding.
6. the wrong mixed excitation electric machine of double cross according to claim 5, it is characterized in that, the number of described iron pole (14) equals the number of poles of motor, and the number of permanent magnetism N pole (13) and permanent magnetism S pole (15) equals the number of pole-pairs of motor.
7. the wrong mixed excitation electric machine of double cross according to claim 3, it is characterized in that, described N pole edge regions (17) number of stator slots is equal with number of slots with S pole edge regions (16) number of stator slots, and number of slots is the even-multiple of number of motor phases.
8. the wrong mixed excitation electric machine of double cross according to claim 1, is characterized in that, described front end housing (3) is connected with rotating shaft (1) by bearing (2) with the middle part of rear end cap (4); Front end housing (3) is connected with casing (8) with the end of rear end cap (4).
9. the wrong mixed excitation electric machine of double cross according to claim 1, it is characterized in that, the rear end of described rotating shaft (1) is provided with fan (7), and fan (7) outer end is provided with fan guard (5), and fan guard (5) is fixed on casing (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510850427.5A CN105305757B (en) | 2015-11-30 | 2015-11-30 | Double cross hybrid excitation motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510850427.5A CN105305757B (en) | 2015-11-30 | 2015-11-30 | Double cross hybrid excitation motor |
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| CN105305757A true CN105305757A (en) | 2016-02-03 |
| CN105305757B CN105305757B (en) | 2017-02-15 |
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|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418375A (en) * | 2018-04-13 | 2018-08-17 | 山东大学 | A kind of multistage spoke for electric vehicle interlocks rotor permanent magnet synchronous motor and its method |
| CN109560677A (en) * | 2019-01-31 | 2019-04-02 | 稻津电机(珠海)有限公司 | A kind of high-speed motor |
| CN109962594A (en) * | 2019-05-05 | 2019-07-02 | 大国重器自动化设备(山东)股份有限公司 | Double output shaft servo motor for robot |
| CN110492710A (en) * | 2019-09-20 | 2019-11-22 | 齐鲁工业大学 | A kind of birotor generator and its control method |
| CN110649732A (en) * | 2019-10-28 | 2020-01-03 | 山东大学 | Mixed excitation rotor and mixed excitation surface-mounted permanent magnet motor |
| CN112398302A (en) * | 2020-12-10 | 2021-02-23 | 沈阳工业大学 | Wide speed regulation range hybrid excitation synchronous motor |
| CN114614585A (en) * | 2022-03-24 | 2022-06-10 | 浙江大学 | Linear-rotary hybrid excitation low-speed generator |
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| CN102195427A (en) * | 2010-03-11 | 2011-09-21 | 南京航空航天大学 | Two-stage hybrid excitation brushless synchronous motor |
| CN102570752A (en) * | 2012-02-01 | 2012-07-11 | 襄阳宇清传动科技有限公司 | hybrid excitation synchronous motor of electric vehicle |
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| CN1870385A (en) * | 2006-06-26 | 2006-11-29 | 沈阳工业大学 | Mixing excitation permanent magnetic synchro generator |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418375A (en) * | 2018-04-13 | 2018-08-17 | 山东大学 | A kind of multistage spoke for electric vehicle interlocks rotor permanent magnet synchronous motor and its method |
| CN108418375B (en) * | 2018-04-13 | 2023-09-12 | 山东大学 | Multi-section spoke staggered rotor permanent magnet synchronous motor for electric automobile and method thereof |
| CN109560677A (en) * | 2019-01-31 | 2019-04-02 | 稻津电机(珠海)有限公司 | A kind of high-speed motor |
| CN109962594A (en) * | 2019-05-05 | 2019-07-02 | 大国重器自动化设备(山东)股份有限公司 | Double output shaft servo motor for robot |
| CN109962594B (en) * | 2019-05-05 | 2024-01-26 | 大国重器自动化设备(山东)股份有限公司 | Double-output-shaft servo motor for robot |
| CN110492710A (en) * | 2019-09-20 | 2019-11-22 | 齐鲁工业大学 | A kind of birotor generator and its control method |
| CN110649732A (en) * | 2019-10-28 | 2020-01-03 | 山东大学 | Mixed excitation rotor and mixed excitation surface-mounted permanent magnet motor |
| CN110649732B (en) * | 2019-10-28 | 2024-02-23 | 山东大学 | Mixed excitation rotor and mixed excitation surface-mounted permanent magnet motor |
| CN112398302A (en) * | 2020-12-10 | 2021-02-23 | 沈阳工业大学 | Wide speed regulation range hybrid excitation synchronous motor |
| CN112398302B (en) * | 2020-12-10 | 2023-09-12 | 沈阳工业大学 | Mixed excitation synchronous motor with wide speed regulation range |
| CN114614585A (en) * | 2022-03-24 | 2022-06-10 | 浙江大学 | Linear-rotary hybrid excitation low-speed generator |
| CN114614585B (en) * | 2022-03-24 | 2023-11-21 | 浙江大学 | Linear-rotary hybrid excitation low-speed generator |
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