CN103244357A - Magnetic suspension bearing disc hybrid excitation doubly salient wind generator - Google Patents
Magnetic suspension bearing disc hybrid excitation doubly salient wind generator Download PDFInfo
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- CN103244357A CN103244357A CN2013102031160A CN201310203116A CN103244357A CN 103244357 A CN103244357 A CN 103244357A CN 2013102031160 A CN2013102031160 A CN 2013102031160A CN 201310203116 A CN201310203116 A CN 201310203116A CN 103244357 A CN103244357 A CN 103244357A
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- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to a magnetic suspension bearing disc hybrid excitation doubly salient wind generator, and aims to solve the technical problem that an existing magnetic suspension wind generator system is too complicated in structure, high in energy consumption, inapplicable to small and medium fans and the like. The technical scheme includes that the magnetic suspension bearing disc hybrid excitation doubly salient wind generator comprises a rotor, two generator stators, two permanent magnet rings, three magnetic suspension bearing stators, fan blades and a rotor shaft, magnetic suspension bearing control windings are wound on the magnetic suspension bearing stators, the fan blades are mounted at one end of the rotor shaft, the rotor is mounted at the other end of the rotor shaft, the fan blades, the rotor and the rotor shaft synchronously rotate, the two permanent magnet rings are connected with the two generator stators respectively and further connected with the magnetic suspension bearing stators, the permanent magnet rings are embedded among the magnetic suspension bearing stators and the generator stators, the magnetic suspension bearing stators are uniformly distributed on the periphery of the rotor, the periphery of the rotor extends into the magnetic suspension bearing stators, and air gaps are reserved among the magnetic suspension bearing stators and two planes of the rotor.
Description
Technical field
The present invention relates to a kind of magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator, specifically is a kind of can the adaptation in low wind speed wind energy regional work, has the extremely low novel magnetically levitated bearing wind-driven generator that starts wind speed, belongs to technical field of wind power generation.
Background technique
Wind energy has huge, the widely distributed characteristics of reserves as clean reproducible energy.At present, the main form of Wind Power Utilization is exactly wind-power electricity generation.But the wind-resources of China is limited, how fully to excavate available wind-resources, realizes wind-power electricity generation in low wind energy zone, and carrying out efficiently, advanced wind-power electricity generation theory and technology research has become wind-powered electricity generation field key scientific problems.Because the traditional wind detent torque is big, start wind speed usually about 3-5m/s, so traditional wind must be installed in the remote districts of middle and high wind speed.Want to realize utilizing the strategy of low wind speed wind energy, be about to wind-driven generator and be installed in low wind speed wind energy areas such as picture city, island district or mountain area, then must solve its low wind speed and start and operation problem.
In order to realize that the low wind speed of wind-driven generator starts, existing numerous scholars have carried out a large amount of research both at home and abroad, its emphasis and difficult point mainly concentrate on two aspects: the one, start with application and the control strategy thereof of research new type electric generator in wind-power electricity generation from the body of generator.The 2nd, to start with from the supporting system of generator amature, how research reduces or eliminates the various mechanical friction resistances of supporting system.
About the research of master section, mainly concentrate at present on three kinds of generators: brushless double feed generator, magneto alternator and double-salient-pole generator.
The frequency that brushless double feed generator can be regulated field current according to the rotation speed change of blower fan realizes constant frequency output, realizes that by amplitude and the phase place that changes field current generator is meritorious, the independent regulation of wattless power.But generally need the adapted high-speed gear box, and be applicable to the startup wind speed of 3-5m/s.Because the air gap of brushless double feed generator is big, and the excitation wattless power of the control winding pwm converter that then needs is also big, therefore be not suitable for use in the low-speed direct driving generator again.
Therefore the direct drive permanent magnetic wind-driven generator has been cancelled step-up gear, has series of advantages, as in light weight, efficient is high, dynamic response is fast etc.Directly drive generator and under the low speed that per minute tens to hundreds of changes, work, for guaranteeing that (30～80Hz), generator need adopt bigger rotor diameter and more number of pole-pairs in the scope of normal frequency in its output.In the design of electrical motor process, after selected stator diameter, can face owing to rotor permanent magnetism magnetic pole quantity causes the problem that the magnetic pole pole span is little, excitation magnetic potential is not enough more.The startup wind speed of direct drive permanent magnetic wind-driven generator is also at 3-5m/s.
Double-salient-pole generator is a kind of New-type electric machine that puts forward the 1950's, just obtain people's extensive concern and further investigation after entering the nineties, the advantage that have firm, easily manufactured, reliable operation simple in structure, is easy to safeguard has good application prospects in the wind-power electricity generation occasion.According to present present Research, double-salient-pole generator can be divided into common double salient pole generator, flux-reversal generator and magnetic flux and switch generator.
Aspect the supporting system research of generator amature, big in order to solve for example surface friction drag that exists in the conventional mechanical bearings, problem such as big and energy consumption height of noise, obviously, magnetic suspension bearing is comparatively ideal selection.In addition, adopt magnetic suspension bearing to come supporting rotor can also save a lot of mechanical parts, reduce size and the weight of wind-driven generator, for it designs the optimization space that provides bigger.
Whether can ACTIVE CONTROL according to suspending power, magnetic suspension bearing can be divided into two types:
(1) passive-type magnetic suspension bearing.Can be divided into two kinds of common permanent-magnet type magnetic suspension bearing and superconductive permanent-magnet type magnetic suspension bearings, common permanent-magnet type magnetic suspension bearing mainly is to utilize repulsion intrinsic between the magnetic material or suction to realize the suspension of rotating shaft.Superconductive permanent-magnet type magnetic suspension bearing utilizes the perfect diamganetism of superconductor that static suspension power is provided.
(2) active magnetic suspension bearing.Active magnetic suspension bearing mainly is the stable suspersion of realizing rotating shaft by the magnetic force between the ACTIVE CONTROL stator and rotor, concrete working principle is: the rotor displacement signal that controller records according to displacement transducer is controlled size and the direction of electric current in the stator electromagnet in real time by power amplifier, makes rotor stability be suspended in given location.Set up the difference of mode according to bias magnetic field, active magnetic suspension bearing can be divided into electromagnetism eccentrically arranged type and permanent magnet bias type.
Because common permanent-magnet type magnetic suspension bearing has advantage simple in structure, that power consumption is little, in magnetic suspending wind turbine generator, studied widely and adopted.Yet, adopt common permanent-magnet type magnetic suspension bearing can't realize the full suspension of rotor merely, also just can't eliminate the mechanical friction between blower fan rotating part and the nonrotational part fully.At least to adopt active magnetic suspension bearing in one degree of freedom for this reason.Permanent magnet bias type magnetic suspension bearing has the advantages that the little while of power consumption can realize ACTIVE CONTROL again, has broad application prospects in wind-driven generator.
Summary of the invention
Technical problem to be solved by this invention is: the structure that exists at existing magnetic suspending wind turbine generator system is too complicated, self energy consumption is big, be not suitable for problem such as medium and small blower fan.
The technological scheme that the present invention takes is:
A kind of magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator comprises rotor, two generator unit stators, two permanent-magnetic clamps, three magnetic suspension bearing stators, fan blade and rotor shafts; Be wound with magnetic suspension bearing control winding on the described magnetic suspension bearing stator;
Fan blade is contained in an end of rotor shaft, and rotor is contained in the other end of rotor shaft, and fan blade and rotor and rotor shaft rotate synchronously; Two permanent-magnetic clamps link to each other with two generator unit stators respectively and link to each other with the magnetic suspension bearing stator simultaneously, and permanent-magnetic clamp is embedded between magnetic suspension bearing stator and the generator unit stator; The magnetic suspension bearing stator is evenly distributed on the periphery of rotor and the periphery of rotor extend in the magnetic suspension bearing stator; Leave air gap between two planes of described magnetic suspension bearing stator and rotor;
Wherein, the centre on two planes of described rotor is equipped with rotor ring salient pole, is equipped with rotor with salient pole on two planes of described rotor; Rotor with salient pole on the arbitrary plane of described rotor is positioned on the same circumference; The uniform setting of rotor with salient pole on the arbitrary plane of described rotor; Leave air gap between described rotor ring salient pole and the rotor with salient pole; The outer edge on two planes of described rotor is equipped with the rotor annular salient pole;
The centre of described generator unit stator one side plane is provided with stator ring salient pole, is provided with stator salient poles around the described stator ring salient pole; Described stator salient poles is positioned on the same circumference; Be wound with the generator excitation winding on the described stator ring salient pole, be wound with the generator armature winding on the stator salient poles; Leave air gap between described generator excitation winding and the generator armature winding;
The magnetizing direction of described permanent-magnetic clamp is radial magnetizing;
Leave air gap between stator ring salient pole on the described generator unit stator and the epitrochanterian rotor ring salient pole, leave air gap between the stator salient poles on the described generator unit stator and the rotor with salient pole of rotor.
In order to have higher power-volume ratio, the gap length between the periphery of described magnetic suspension bearing stator and rotor is preferably 0.3-1.5mm.
In order to have higher specific power, gap length is preferably 0.3-1.5mm between the stator ring salient pole on the generator unit stator and the epitrochanterian rotor ring salient pole.
In order to have higher specific power, gap length is preferably 0.3-1.5mm between the stator salient poles on the generator unit stator and the rotor with salient pole of rotor.
Rotor with salient pole of the present invention is fan-shaped.
Stator salient poles of the present invention is fan-shaped.
Beneficial effect
The present invention's beneficial effect compared with prior art: 1. adopt two stator disc type mixed excitation bisalient-pole generators, have the specific power height, location torque is little, the characteristics that the output voltage pulsation is little.2. adopt permanent magnet bias type magnetic suspension bearing, bias magnetic field is produced by permanent magnet, when not influencing suspendability, can also reduce the energy consumption of magnetic levitation bearing system widely.3. the five degree of freedom that can realize rotor suspends, thereby eliminates the mechanical friction between the stator and rotor, the resisting moment when reducing fan starting, the noise when reducing operation.4. under steady state, be axially not eccentric between the stator and rotor, solved the influence of stator and rotor off-centre to generator performance.
Description of drawings
Fig. 1 is the structural representation of embodiments of the invention.
Wherein, 1, magnetic suspension bearing control winding, 2, the magnetic suspension bearing stator, 3, permanent-magnetic clamp, 4, generator unit stator, 5, the generator excitation winding, 6, the generator armature winding, 7, rotor, 8, fan blade, 9, rotor shaft.
Embodiment
The present invention is example with the three-phase wind-driven generator, further specifies.
For content of the present invention is become apparent more, be further described below in conjunction with accompanying drawing 1 and embodiment.
As shown in Figure 1, magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator of the present invention comprises rotor 7, two generator unit stators 4, two permanent-magnetic clamps 3, three magnetic suspension bearing stators 2, fan blade 8 and rotor shafts 9; Be wound with magnetic suspension bearing control winding 1 on the described magnetic suspension bearing stator 2.
The centre of rotor 7 of the present invention is provided with the groove that matches with rotor shaft 9.Described rotor 7 is in the form of annular discs, and the centre on 7 two planes of rotor is equipped with rotor ring salient pole, is equipped with two rotor with salient pole on two planes of rotor 7; Rotor with salient pole on rotor 7 arbitrary planes is positioned on the same circumference; The uniform setting of rotor with salient pole on rotor 7 arbitrary planes; Leave the air gap of 0.3-1.5mm between described rotor ring salient pole and the rotor with salient pole; In order to produce radially driven suspension power, the outer edge on 7 two planes of rotor of the present invention is equipped with the rotor annular salient pole.
The shape of two rotor with salient pole on the rotor 7 of the present invention adopt Any shape can, the present invention preferentially adopt the shape of rotor with salient pole preferential adopt fan-shaped, i.e. the fan-shaped salient pole of rotor.
The centre of generator unit stator 4 of the present invention is provided be used to the center hole that runs through rotor shaft 9, and the centre of generator unit stator 4 one side planes is provided with stator ring salient pole, is provided with three stator salient poles around the stator ring salient pole; Stator salient poles is positioned on the same circumference; Be wound with generator excitation winding 5 on the stator ring salient pole, be wound with generator armature winding 6 on the stator salient poles; Leave the air gap of 0.3-1.5mm between generator excitation winding 5 and the generator armature winding 6.Two generator unit stator 4 structures of the present invention are just the same, two generator unit stators 4 lay respectively at the above and below of rotor 7, make that the stator ring salient pole on the generator unit stator 4 is corresponding with the rotor ring salient pole on the rotor 7, the stator salient poles on the generator unit stator 4 is corresponding with the rotor with salient pole on the rotor 7.
The shape of three stator salient poles on the generator unit stator 4 of the present invention adopt Any shape can, the present invention preferentially adopts the shape A Wei of stator salient poles fan-shaped, i.e. the fan-shaped salient pole of stator.
Leave the air gap of 0.3-1.5mm between stator ring salient pole on the described generator unit stator 4 and the rotor ring salient pole on the rotor 7, leave the air gap of 0.3-1.5mm between the stator salient poles on the described generator unit stator 4 and the rotor with salient pole of rotor 7.The magnetizing direction of described permanent-magnetic clamp 3 is radial magnetizing.Three-phase wind-driven generator of the present invention is with three generator armature windings, the 6 difference external AC control circuits in the generator unit stator 4 or direct current control circuit.
Three generator armature windings in the generator unit stator of the present invention 4 are coupled together external one road Ac control circuit or direct current control circuit, just can constitute single-phase wind-driven generator.
If will constitute the two-phase wind-driven generator, the quantity of the generator armature winding 6 in the generator unit stator 4 is necessary for even number, and the Ac control circuit of external two-way or direct current control circuit just can constitute the two-phase wind-driven generator.
The present invention utilizes the effect between magnetic suspension bearing stator 2 and the rotor 7 to realize the radially ACTIVE CONTROL of degrees of freedom and two other Passive Control of degrees of freedom radially of 8 one axial freedoms of rotor shaft 9, fan blade on rotor 7 and fixing and the rotor 7 and two.Be that active force between magnetic suspension bearing stator 2 and the rotor 7 can ACTIVE CONTROL, thereby make rotor 7 can stable suspersion at given location, based on 3 principles of determining a plane, utilize three magnetic suspension bearing stators 2 just can realize the radially ACTIVE CONTROL of degrees of freedom of 8 one axial freedoms of rotor shaft 9, fan blade on rotor 7 and fixing and the rotor 7 and two, utilize the suction between the salient pole on the stator and rotor, can realize two other radially Passive Control of degrees of freedom.
Working principle of the present invention:
When adopting the present invention to utilize wind-power electricity generation, wind is to fan blade 8, fan blade 8 drives rotor shaft 9 and rotates, rotor shaft 9 drives and is sleeved on its outside rotor 7 rotations, because the existence of rotor 7 upper rotor part ring salient poles and rotor with salient pole, thereby can cause excitation field with generator armature winding 6 linkages to change during rotor 7 rotation and in generator armature winding 6, induce electromotive force, the size of induction electromotive force is relevant with the magnetic flux of rotor speed and excitation field, by the size that the electric current of regulating in the exciting winding 5 can be regulated excitation field magnetic flux, make that the output voltage of generator armature winding 6 keeps steady state value under different rotating speeds.
Part that the present invention does not relate to all same as the prior art or employing prior art is realized.
Claims (6)
1. a magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator is characterized in that: comprise rotor (7), two generator unit stators (4), two permanent-magnetic clamps (3), three magnetic suspension bearing stators (2), fan blade (8) and rotor shaft (9); Be wound with magnetic suspension bearing control winding (1) on the described magnetic suspension bearing stator (2);
Fan blade (8) is contained in an end of rotor shaft (9), and rotor (7) is contained in the other end of rotor shaft (9), and fan blade (8) and rotor (7) rotate synchronously with rotor shaft (9); Two permanent-magnetic clamps (3) link to each other with two generator unit stators (4) respectively and link to each other with magnetic suspension bearing stator (2) simultaneously, and permanent-magnetic clamp (3) is embedded between magnetic suspension bearing stator (2) and the generator unit stator (4); Magnetic suspension bearing stator (2) is evenly distributed on the periphery of rotor (7) and the periphery of rotor (7) extend in the magnetic suspension bearing stator (2); Leave air gap between two planes of described magnetic suspension bearing stator (2) and rotor (7);
Wherein, the centre on (7) two planes of described rotor is equipped with rotor ring salient pole, is equipped with rotor with salient pole on two planes of described rotor (7); Rotor with salient pole on the arbitrary plane of described rotor (7) is positioned on the same circumference; The uniform setting of rotor with salient pole on the arbitrary plane of described rotor (7); Leave air gap between described rotor ring salient pole and the rotor with salient pole; The outer edge on (7) two planes of described rotor is equipped with the rotor annular salient pole;
The centre of described generator unit stator (4) one side planes is provided with stator ring salient pole, is provided with stator salient poles around the described stator ring salient pole; Described stator salient poles is positioned on the same circumference; Be wound with generator excitation winding (5) on the described stator ring salient pole, be wound with generator armature winding (6) on the stator salient poles; Leave air gap between described generator excitation winding (5) and the generator armature winding (6);
The magnetizing direction of described permanent-magnetic clamp (3) is radial magnetizing;
Leave air gap between the rotor ring salient pole on stator ring salient pole on the described generator unit stator (4) and the rotor (7), leave air gap between the rotor with salient pole of the stator salient poles on the described generator unit stator (4) and rotor (7).
2. magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator as claimed in claim 1, it is characterized in that: the air gap between the periphery of described magnetic suspension bearing stator (2) and rotor (7) is 0.3-1.5mm.
3. magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator as claimed in claim 1, it is characterized in that: air gap is 0.3-1.5mm between the rotor ring salient pole on the stator ring salient pole on the generator unit stator (4) and the rotor (7).
4. magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator as claimed in claim 1, it is characterized in that: air gap is 0.3-1.5mm between the rotor with salient pole of the stator salient poles on the generator unit stator (4) and rotor (7).
5. magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator as claimed in claim 1, it is characterized in that: described rotor with salient pole is fan-shaped.
6. magnetic suspension bearing disc type mixed excitation bisalient-pole wind-driven generator as claimed in claim 1, it is characterized in that: described stator salient poles is fan-shaped.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107191486A (en) * | 2017-07-13 | 2017-09-22 | 许占欣 | A kind of magnetic suspension rotating shaft of low-speed generator |
| CN108087203A (en) * | 2018-01-22 | 2018-05-29 | 曲阜师范大学 | Magnetic suspension hybrid wind power generation system |
| CN108425804A (en) * | 2018-04-10 | 2018-08-21 | 曲阜师范大学 | A kind of low wind speed vertical axis wind power generator and its control method |
| CN109474090A (en) * | 2018-11-15 | 2019-03-15 | 南京工业大学 | Doubly salient permanent magnet motor |
| CN109980675A (en) * | 2019-04-25 | 2019-07-05 | 曲阜师范大学 | Flexible DC transmission double-fed magnetic suspension vertical shaft wind generator system and its control method |
| CN113346700A (en) * | 2021-06-10 | 2021-09-03 | 中国石油大学(华东) | Controllable magnetic field modulation axial flux generator combined with magnetic suspension |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107191486A (en) * | 2017-07-13 | 2017-09-22 | 许占欣 | A kind of magnetic suspension rotating shaft of low-speed generator |
| CN108087203A (en) * | 2018-01-22 | 2018-05-29 | 曲阜师范大学 | Magnetic suspension hybrid wind power generation system |
| CN108087203B (en) * | 2018-01-22 | 2023-10-10 | 曲阜师范大学 | Magnetic suspension hybrid wind power generation system |
| CN108425804A (en) * | 2018-04-10 | 2018-08-21 | 曲阜师范大学 | A kind of low wind speed vertical axis wind power generator and its control method |
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| CN109474090A (en) * | 2018-11-15 | 2019-03-15 | 南京工业大学 | Doubly salient permanent magnet motor |
| CN109980675A (en) * | 2019-04-25 | 2019-07-05 | 曲阜师范大学 | Flexible DC transmission double-fed magnetic suspension vertical shaft wind generator system and its control method |
| CN109980675B (en) * | 2019-04-25 | 2024-01-05 | 曲阜师范大学 | Double-fed magnetic suspension vertical axis wind power generation system for flexible direct current transmission and control method thereof |
| CN113346700A (en) * | 2021-06-10 | 2021-09-03 | 中国石油大学(华东) | Controllable magnetic field modulation axial flux generator combined with magnetic suspension |
| CN113346700B (en) * | 2021-06-10 | 2022-08-09 | 中国石油大学(华东) | Controllable magnetic field modulation axial flux generator combined with magnetic suspension |
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Effective date of registration: 20161025 Address after: Tai Feng Road along the street of Pukou District of Nanjing City, Jiangsu province 210000 No. 59 room 206 Silicon Valley 2-B business days Patentee after: Nanjing wheel Power Technology Co., Ltd. Address before: 210009 Nanjing new model road, Jiangsu, No. 30 Patentee before: Nanjing University of Technology |