CN102223034B - Large directly-driven reluctance wind motor and unit system thereof - Google Patents
Large directly-driven reluctance wind motor and unit system thereof Download PDFInfo
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- CN102223034B CN102223034B CN 201110155440 CN201110155440A CN102223034B CN 102223034 B CN102223034 B CN 102223034B CN 201110155440 CN201110155440 CN 201110155440 CN 201110155440 A CN201110155440 A CN 201110155440A CN 102223034 B CN102223034 B CN 102223034B
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Abstract
The invention discloses a large directly-driven reluctance wind motor, comprising a stator and a rotor, wherein the stator has a dual-stator structure that comprises an external stator and an internal stator; the rotor is arranged between the external stator and the internal stator and adopts a double-salientpole structure; the external stator consists of an external stator iron core and an external stator winding; the internal stator consists of an internal stator iron core and an internal stator winding; the external stator and the rotor form a first working air clearance; the rotor and the internal stator form a second working air clearance; the external stator winding and the internal stator winding correspond to the in-phase winding and are connected with each other in opposite phase in series; and the first working air clearance is connected in series with the second working air clearance. The invention also discloses a unit system that comprises the large directly-driven reluctance wind motor. As the dual-stator switch reluctance wind motor with a simple and reliable structure is adopted in the wind motor unit system, the weight and the cost of the large directly-driven reluctance wind motor unit of MW level and higher can be reduced greatly; and the competition advantage of the switch reluctance wind motor unit in the wind power industry can be improved.
Description
Technical field
The present invention relates to the wind-powered electricity generation field, particularly, relate to large-scale switching magnetic-resistance wind-driven generator and the machine set system thereof of directly driving.
Background technology
Development along with Wind Power Generation Industry, wind power technology is also constantly being upgraded, is being regenerated, main manifestations is: raising single-machine capacity, development new technology are improved the wind-powered electricity generation unit performance, improve wind energy utilization, are reduced wind power cost, more pay attention to the control of aerogenerator unit safe and system reliability.Wind energy turbine set operation control, prediction dispatching technique are also constantly perfect.Simultaneously, utilize offshore wind energy resource, development marine wind electric field construction technique, the large-scale offshore wind farm machine of development consist of the technical development emphasis.
At present power at MW class and above large-scale wind electricity unit mainly take the double feed wind power generator group with directly drive total power changing type wind turbine generator as main.The double feed wind power generator group has best cost performance, but to the ride-through capability of electric network fault and enabling capabilities a little less than.The driving-chain of double feed wind power generator group must have high power gearbox, and this reliability and maintainability to unit has proposed harsher requirement.Directly drive total power changing type wind turbine generator and be incorporated into the power networks by frequency converter, stronger to the ride-through capability of electric network fault, certain support electrical network ability is arranged, avoided the maintenance workload of high power gearbox, reliability increases.But because its rotating speed is very low, along with the increase of power, the manufacturing process of multipole several magneto alternators is complicated, technical difficulty is large, and motor volume is large, and cost is high, while is along with the continuous increase of unit capacity, expensive its use cost that increased of big-power transducer.
The switched reluctance wind generator system is take switch reluctance generator as the energy converting between mechanical core, switch reluctance generator is double salient-pole electric machine, stator, rotor are the salient pole tooth slot structure, and stator is provided with concentrated winding, on the rotor both without winding also without permanent magnet.Bring thus the terseness of frequency converter and control, driving.The power characteristic of wind energy conversion system has the characteristics of himself, for the best results that wind energy is caught, just must make cooperating that switch reluctance generator and wind energy conversion system can be good, by the control to electricity generation system, wind energy conversion system is operated on the best power load line, and switch reluctance generator itself has the advantages that controllable parameter is many, non-linear, lack clear and definite Mathematical Modeling.Have brush DC generator and rotary rectifier no-brush synchronous generator to compare with traditional, switch reluctance generator has that obvious fault-tolerant ability is strong, combination starting and generating easily, be fit to the operation of high temperature (＞250 ℃) environment and the advantages such as large capacity, high efficiency and high power density operation.This power generator air gap magnetic field and magnetic linkage mutually with rotor-position and winding phase current continue, cyclic variation, do not have the stable magnetic circuit working point of conventional motors, but a dynamic 3 D magnetic space.Switch reluctance generator does not have independently excitation winding, but unites two into one with concentrating the stator armature that embeds, and realizes excitation and generating by controller timesharing control, thereby simplifies the structure, and has improved reliability.Simultaneously, close without electric lotus root between this generator phase winding, its fault-tolerant ability strengthens greatly.In addition, switch reluctance generator mechanical structure is simple, firm reliable.
Along with the raising of device for high-power power electronic cost performance and the development of control strategy, the advantage of Switched Reluctance GeneratorUsed in Wind Energy Converter System will be embodied gradually.
Along with the increase of power of motor, the volume of motor will be increasing.Especially for slowspeed machine, switching magnetic-resistance wind-driven generator for example, when power was above greater than megawatt or number megawatt, it is quite huge that its volume will become, to such an extent as to can bring very big difficulty to transportation.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, provide a kind of and can significantly reduce motor volume and weight, namely reduce again large-scale switching magnetic-resistance wind-driven generator and the machine set system thereof of directly driving of convenient transportation of cost.
The technical scheme that realizes above-mentioned purpose is as follows:
The large-scale switching magnetic-resistance wind-driven generator that directly drives comprises stator and rotor, and described stator is the double-stator structure that comprises external stator and internal stator, and described rotor adopts the double-salient-pole structure between external stator and internal stator; Described external stator is comprised of external stator core and external stator winding; Described internal stator is comprised of inner-stator iron core and internal stator winding; External stator and rotor form the first working gas gap, and rotor and internal stator form the second working gas gap, and the external stator winding is corresponding to the internal stator winding the anti-phase series connection of phase winding, and the first working gas gap is connected with the second working gas gap magnetic circuit.
Further, also comprise wheel hub, fixed axis, fore bearing, axle sleeve, rear bearing, fore bearing end cap, rear bearing keeper, hollow rotation axis, rotor rotating disk, internal stator support, motor front end cover, motor housing and frame; Described fixed axis is connected with frame, fore bearing and rear bearing are installed on the fixed axis, axle sleeve is sleeved on the fixed axis and is positioned at the interannular of forward and backward two bearings, the rear bearing keeper is arranged on the rear bearing outside, hollow rotary axle box is contained on the forward and backward bearing of fixed axis, and the fore bearing end cap is connected with hollow rotation axis; Described wheel hub is connected with hollow rotation axis, rotor rotating disk, the rotor rotating disk connects the front end of rotor, and internal stator is installed on the internal stator support, and the internal stator support is connected with frame, external stator is installed in the motor housing, and the motor housing two ends link to each other with motor front end cover and frame respectively.
Further, between internal stator support and frame, also be provided with rotor after-poppet, rotor rear bearing, rotor rear bearing rack and rear flange; The rear end of described rotor connects the rotor after-poppet, the rotor after-poppet is installed on the rotor rear bearing, the rotor rear bearing is installed on the rotor rear bearing rack, rotor rear bearing rack one end links to each other with the internal stator support, the other end be connected with rear flange, frame and described motor housing and frame between also be connected through described rear flange.
Further, described fore bearing and rear bearing are self-aligning bearing.
Further, described fixed axis is hollow fixed axis.
The engine room cover of glass fibre reinforced plastic structure also is installed in the frame outside further.
Further, described rear bearing keeper is spindle nut or rear bearing end cap.
Further, described rotor rear bearing is deep groove ball bearing.
The present invention also provides the large-scale switching magnetic-resistance wind-driven generator group system that directly drives, and comprises above-mentioned switching magnetic-resistance wind-driven generator and power inverter, dc-battery, inverter and load, controller, accessory power supply; Described switching magnetic-resistance wind-driven generator is connected with power inverter, is parallel with described dc-battery between power inverter and inverter and the load; Described dc-battery is connected with controller; Described controller links to each other with power inverter; Described accessory power supply is connected with controller.
The present invention has adopted double-stator structure in directly driving switching magnetic-resistance wind-driven generator and machine set system thereof, the technical scheme that has adopted fixed axis to support simultaneously in driving-chain.Therefore, the present invention has the following advantages:
1, directly drives two stator switch magnetic resistance generators with respect to single stator switch magnetic resistance generator, the power output of motor unit volume is increased, thereby reduce motor volume and weight, both reduced cost, made things convenient for again transportation.
2, the present invention has adopted the frame mode that fixed axis supports in transmission, can use so expensive double-row conical bearing (nautilus bearing), and can adopt self-aligning bearing commonly used in the wind-powered electricity generation unit.The bearing assembly comparative result originally of these two kinds of driving-chain designs is: nautilus bearing scheme is about the twice of self-aligning bearing scheme.Therefore, the present invention program's bearing cost has saving by a relatively large margin.
3, the load that has adopted fixed axis to bear and transmit impeller just can use that the size that need bear wheel hub load is large, the cabin housing of Heavy Weight, and the engine room cover that replaces can adopt the light type glass-fiber-reinforced structure, from and significantly reduced complete machine weight.
4, organization plan of the present invention does not adopt heavy forging main shaft, but has adopted hollow fixed axis to bear and transmit the load of wheel hub, and such structure has significantly reduced weight and the cost of main shaft.
5, the present invention has added a conventional deep groove ball bearing in the generator amature rear end.This bearing can guarantee concentric at any running status lower rotor part and stator of generator.The present invention can significantly alleviate weight and the cost of direct wind-driven generator, can be widely used in the direct-driving type wind power generation system.
Description of drawings
Fig. 1 is the large-scale rotor sectional view that directly drives the switching magnetic-resistance wind-driven generator of the present invention;
Fig. 2 is the large-scale overall structure critical piece assembling schematic diagram that directly drives the switching magnetic-resistance wind-driven generator of the present invention;
Fig. 3 is the large-scale composition structural representation that directly drives switching magnetic-resistance wind-driven generator group system among the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, the large-scale switching magnetic-resistance wind-driven generator that directly drives of the present invention comprises stator and rotor 8, and stator is the double-stator structure that comprises external stator 7 and internal stator 9, and rotor 8 adopts the double-salient-pole structure between external stator 7 and internal stator 9;
As shown in Figure 2, some short and small center lines represent the screw bolt and nut of all size among the figure.Comprise in the large-scale main parts size of directly driving in the switching magnetic-resistance wind-driven generator overall structure of the present invention: wheel hub 1, fore bearing end cap 2, hollow rotation axis 3, motor front end cover 4, rotor rotating disk 5, motor housing 6, external stator 7, rotor 8, internal stator 9, rotor after-poppet 10, internal stator support 11, rear flange 12, rotor rear bearing rack 13, frame 14, fore bearing 15, axle sleeve 16, fixed axis 17, rear bearing 18, rear bearing keeper (spindle nut) 19, rotor rear bearing 20.
Wherein, fixed axis 17 is fastened together with frame 14, fore bearing 15 and rear bearing 18 are installed on the fixed axis 17, axle sleeve 16 is sleeved on the fixed axis 17 and is positioned at forward and backward two bearings 15,18 interannular, rear bearing keeper (spindle nut) 19 is arranged on rear bearing 18 outsides, hollow rotation axis 3 is sleeved on the forward and backward bearing 15,18 of fixed axis 17, fore bearing end cap 2 through bolted on hollow rotation axis 3.
Wheel hub 1 tightens together via seam flange and bolt and rotor rotating disk 5 and hollow rotation axis 3, rotor rotating disk 5 is fastenedly connected the front end at rotor 8, rotor rotating disk 5 is used for transmitting the moment of torsion of wheel hub, rotor 8 is arranged between internal stator 9 and the external stator 7, internal stator 9 is installed on the internal stator support 11, external stator 7 is installed in the motor housing 6, and the front end of motor housing 6 links to each other with motor front end cover 4.The rear end of rotor 8 is fastenedly connected rotor after-poppet 10, rotor after-poppet 10 is used for guaranteeing that rotor 8 rear ends are concentric with stator, rotor after-poppet 10 is installed on the rotor rear bearing 20, rotor rear bearing 20 is installed on the rotor rear bearing rack 13, rear bearing rack 13 1 ends link to each other with internal stator support 11, and the other end and rear flange 12, frame 14 are fixed together.Rear flange 12 is fixed together with rear end, the frame 14 of motor housing 6.
Fore bearing 15, rear bearing 18 in above-described embodiment all can adopt self-aligning bearing; Fixed axis 17 can adopt hollow fixed axis; Rotor rear bearing 20 can be selected conventional deep groove ball bearing; Wherein also available rear bearing end cap replacement of rear bearing keeper 19; The engine room cover (not shown) of glass fibre reinforced plastic structure can also be installed in frame 14 outsides.
As shown in Figure 3, the switching magnetic-resistance wind-driven generator group system that directly drives of the present invention comprises above-mentioned two stator switch magnetic resistance generators 21, power inverter 22, dc-battery 23, inverter and load 24, controller 25, accessory power supply 26, wherein two stator switch magnetic resistance wind-driven generators 21 are connected with power inverter 22, are parallel with dc-battery 23 between power inverter 22 and inverter and the load 24; Dc-battery 23 is connected with controller 25; Controller 25 links to each other with power inverter 22; Accessory power supply 26 is connected with controller 25.
The double-salient-pole rotor of two stator switch magnetic resistance generators 21 drags rotation by wheel hub, is wind energy/mechanical energy conversion device; Power inverter 22 receives the control command that controllers 25 send, and the direct current that two stator switch magnetic resistance generators 21 are sent is exported to the energy storage device-dc-battery 23 of system; Controller 25; comprise drive circuit, over-voltage over-current protection circuit, voltage and current detection circuit, rotor position detection circuit, single-chip microcomputer or DSP minimum system circuit etc.; feedback information and the outside instructions of inputting such as motor rotor position, speed and the electric current that controller 25 integrated treatment rotor position detectors, electric current and voltage detector provide; realization is to the control of two stator switch magnetic resistance generator 21 running statuses; control each phase winding of inside and outside stator and take turns to operate, realize that mechanical energy is to the conversion of electric energy.Dc-battery 23 is energy storage devices of system; Inverter and load 24, the dc inverter that two stator switch magnetic resistance generators 21 are sent becomes alternating current, directly supplies with AC load; Accessory power supply 26, be used for to controller 25 provide ± 15V, ± multiple power supplies such as 5V.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the large-scale switching magnetic-resistance wind-driven generator that directly drives comprises stator and rotor, it is characterized in that, described stator is the double-stator structure that comprises external stator and internal stator, and described rotor adopts the double-salient-pole structure between external stator and internal stator;
Described external stator is comprised of external stator core and external stator winding; Described internal stator is comprised of inner-stator iron core and internal stator winding; External stator and rotor form the first working gas gap, and rotor and internal stator form the second working gas gap, and the external stator winding is corresponding to the internal stator winding the anti-phase series connection of phase winding, and the first working gas gap is connected with the second working gas gap magnetic circuit;
Also comprise wheel hub, fixed axis, fore bearing, axle sleeve, rear bearing, fore bearing end cap, rear bearing keeper, hollow rotation axis, rotor rotating disk, internal stator support, motor front end cover, motor housing and frame;
Described fixed axis is connected with frame, fore bearing and rear bearing are installed on the fixed axis, axle sleeve is sleeved on the fixed axis and is positioned at the interannular of forward and backward two bearings, the rear bearing keeper is arranged on the rear bearing outside, hollow rotary axle box is contained on the forward and backward bearing of fixed axis, and the fore bearing end cap is connected with hollow rotation axis;
Described wheel hub is connected with hollow rotation axis, rotor rotating disk, the rotor rotating disk connects the front end of rotor, and internal stator is installed on the internal stator support, and the internal stator support is connected with frame, external stator is installed in the motor housing, and the motor housing two ends link to each other with motor front end cover and frame respectively.
2. the large-scale switching magnetic-resistance wind-driven generator that directly drives according to claim 1 is characterized in that, also is provided with rotor after-poppet, rotor rear bearing, rotor rear bearing rack and rear flange between internal stator support and frame;
The rear end of described rotor connects the rotor after-poppet, the rotor after-poppet is installed on the rotor rear bearing, the rotor rear bearing is installed on the rotor rear bearing rack, rotor rear bearing rack one end links to each other with the internal stator support, the other end be connected with rear flange, frame and described motor housing and frame between also be connected through described rear flange.
3. the large-scale switching magnetic-resistance wind-driven generator that directly drives according to claim 1 and 2 is characterized in that described fore bearing and rear bearing are self-aligning bearing.
4. the large-scale switching magnetic-resistance wind-driven generator that directly drives according to claim 1 and 2 is characterized in that described fixed axis is hollow fixed axis.
5. the large-scale switching magnetic-resistance wind-driven generator that directly drives according to claim 1 and 2 is characterized in that, the engine room cover of glass fibre reinforced plastic structure also is installed in the frame outside.
6. the large-scale switching magnetic-resistance wind-driven generator that directly drives according to claim 1 and 2 is characterized in that, described rear bearing keeper is spindle nut or rear bearing end cap.
7. the large-scale switching magnetic-resistance wind-driven generator that directly drives according to claim 2 is characterized in that described rotor rear bearing is deep groove ball bearing.
8. the large-scale switching magnetic-resistance wind-driven generator group system that directly drives is characterized in that, comprises each described switching magnetic-resistance wind-driven generator of claim 1-7, power inverter, dc-battery, inverter and load, controller, accessory power supply;
Described switching magnetic-resistance wind-driven generator is connected with power inverter, is parallel with described dc-battery between power inverter and inverter and the load; Described dc-battery is connected with controller; Described controller links to each other with power inverter; Described accessory power supply is connected with controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110155440 CN102223034B (en) | 2011-06-10 | 2011-06-10 | Large directly-driven reluctance wind motor and unit system thereof |
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| CN 201110155440 CN102223034B (en) | 2011-06-10 | 2011-06-10 | Large directly-driven reluctance wind motor and unit system thereof |
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| CN102223034A CN102223034A (en) | 2011-10-19 |
| CN102223034B true CN102223034B (en) | 2013-04-10 |
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| CN103001423B (en) * | 2012-11-20 | 2014-09-03 | 史立伟 | Internal-external double-stator electro-magnetic double-salient starter generator |
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| US4794286A (en) * | 1986-04-03 | 1988-12-27 | Adept Technology, Inc. | Variable reluctance stepper motor |
| CN101122279A (en) * | 2006-08-10 | 2008-02-13 | 郭峰 | Wind-driven generator synchronous belt transmission automatic wind-aiming drift device |
| CN101741155A (en) * | 2008-11-14 | 2010-06-16 | 山东科汇电力自动化有限公司 | Switched reluctance generator (SRG) |
| CN101917101A (en) * | 2010-08-06 | 2010-12-15 | 国电联合动力技术有限公司 | Double-stator direct-drive permanent magnet wind powered generator |
| CN201786562U (en) * | 2010-08-06 | 2011-04-06 | 国电联合动力技术有限公司 | Dual-stator direct drive permanent magnet wind-driven generator |
| CN202103553U (en) * | 2011-06-10 | 2012-01-04 | 国电联合动力技术有限公司 | Large-size direct-drive switched reluctance wind power generator and generator set system of same |
-
2011
- 2011-06-10 CN CN 201110155440 patent/CN102223034B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4794286A (en) * | 1986-04-03 | 1988-12-27 | Adept Technology, Inc. | Variable reluctance stepper motor |
| CN101122279A (en) * | 2006-08-10 | 2008-02-13 | 郭峰 | Wind-driven generator synchronous belt transmission automatic wind-aiming drift device |
| CN101741155A (en) * | 2008-11-14 | 2010-06-16 | 山东科汇电力自动化有限公司 | Switched reluctance generator (SRG) |
| CN101917101A (en) * | 2010-08-06 | 2010-12-15 | 国电联合动力技术有限公司 | Double-stator direct-drive permanent magnet wind powered generator |
| CN201786562U (en) * | 2010-08-06 | 2011-04-06 | 国电联合动力技术有限公司 | Dual-stator direct drive permanent magnet wind-driven generator |
| CN202103553U (en) * | 2011-06-10 | 2012-01-04 | 国电联合动力技术有限公司 | Large-size direct-drive switched reluctance wind power generator and generator set system of same |
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