CN110601479A - Double-rotor induction wind driven generator and working method thereof - Google Patents
Double-rotor induction wind driven generator and working method thereof Download PDFInfo
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- CN110601479A CN110601479A CN201910892311.6A CN201910892311A CN110601479A CN 110601479 A CN110601479 A CN 110601479A CN 201910892311 A CN201910892311 A CN 201910892311A CN 110601479 A CN110601479 A CN 110601479A
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- 230000006698 induction Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 50
- 230000001360 synchronised effect Effects 0.000 claims description 14
- 230000009977 dual effect Effects 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 6
- 241000555745 Sciuridae Species 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
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- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000011017 operating method Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 8
- 230000005284 excitation Effects 0.000 abstract description 6
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 6
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000007792 addition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
Abstract
A double-rotor induction wind driven generator comprises a shell, wherein a rotating shaft is rotatably connected to the shell, a stator and a rotor are arranged in the shell, the rotor comprises an inner squirrel-cage rotor and an outer permanent magnet rotor, the stator is arranged between the inner squirrel-cage rotor and the outer permanent magnet rotor, the stator is fixedly connected with the shell, the inner squirrel-cage rotor is fixedly connected with the rotating shaft, an outer air gap is arranged between the outer permanent magnet rotor and the stator, and an inner air gap is arranged between the stator and the inner squirrel-cage rotor; the outer permanent magnet type rotor comprises a permanent magnet and a magnetic conduction sleeve, the permanent magnet is fixedly arranged on the inner wall of the magnetic conduction sleeve, and the magnetic conduction sleeve is rotatably connected with the rotating shaft and the shell; one end of the rotating shaft is fixedly provided with a main wind wheel which is arranged on the outer side of the casing. The permanent magnet type rotor is excited, electric excitation is not needed in the starting process of the wind driven generator, reactive excitation current absorbed by the wind driven generator from a power grid can be effectively reduced in the normal operation process, and the permanent magnet type rotor is suitable for induction wind power generation places in direct-drive occasions with severe environments.
Description
Technical Field
The invention relates to the technical field of new energy power generation, in particular to a double-rotor induction wind driven generator and a working method thereof.
Background
Renewable energy sources are widely applied to occasions with severe environments such as offshore wind power generation and the like. In these wind power generation sites, ordinary induction generators are used in large quantities because the induction generators have the advantages of: the structure is firm, the structure is brushless, the independent direct current power supply is used without excitation, the maintenance is convenient, the overload and short circuit self-protection is realized, no frequency control equipment is needed, and the initial investment and the maintenance cost are low. However, the excitation current from the grid is required to generate induced potential at start-up and during normal operation of a conventional induction generator, which results in poor performance of the induction generator in terms of power factor and efficiency. This is a disadvantage of the prior art.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art has the defects, and provides a double-rotor induction wind driven generator and a working method thereof.
The scheme is realized by the following technical measures: a double-rotor induction wind driven generator comprises a shell, wherein a rotating shaft is rotatably connected to the shell, a stator and a rotor are arranged in the shell, the rotor comprises an inner squirrel-cage rotor and an outer permanent magnet rotor, the stator is arranged between the inner squirrel-cage rotor and the outer permanent magnet rotor, the stator is fixedly connected with the shell, the inner squirrel-cage rotor is fixedly connected with the rotating shaft, an outer air gap is arranged between the outer permanent magnet rotor and the stator, and an inner air gap is arranged between the stator and the inner squirrel-cage rotor; the outer permanent magnet type rotor comprises a permanent magnet and a magnetic conduction sleeve, the permanent magnet is fixedly arranged on the inner wall of the magnetic conduction sleeve, and the magnetic conduction sleeve is rotatably connected with the rotating shaft and the shell; one end fixed mounting of pivot has main wind wheel, main wind wheel sets up the outside at the casing.
Preferably, one end of the magnetic conduction sleeve is fixedly connected with an auxiliary wind wheel, and the auxiliary wind wheel is arranged on the outer side of the casing.
Preferably, the inner squirrel-cage rotor comprises an inner squirrel-cage rotor iron core and squirrel-cage bars, and the squirrel-cage bars are uniformly distributed in the iron core grooves on the outer circumference of the inner squirrel-cage rotor.
Preferably, the stator comprises a stator core and a stator winding, the stator winding is installed in a slot of the stator core, and the stator winding is a three-phase back-to-back annular double-layer symmetrical alternating current winding.
Preferably, the stator core is internally and externally grooved, the stator winding is annularly distributed, and the stator winding is wound in the stator internal and external grooves, that is, one side of a stator winding coil is in the stator core external groove, and the other side is in the stator core internal groove.
Preferably, the number of pole pairs of the outer permanent magnet rotor is the same as the number of pole pairs generated by the stator winding.
Preferably, the central line of the stator, the central line of the magnetic conducting sleeve and the central line of the inner squirrel cage rotor are on the same straight line.
One end of the rotating shaft is connected with the shell through a shell bearing, the other end of the rotating shaft is connected with a magnetic conduction sleeve through a bearing, and the magnetic conduction sleeve is connected with the shell through a shell bearing.
Preferably, the magnetizing direction of the permanent magnet is radial magnetizing.
A working method of a double-rotor induction wind driven generator comprises the following two working methods according to the different running directions of outer permanent magnet rotors:
the inner squirrel-cage rotor operates at an ultra-synchronous speed, and the outer permanent magnet rotor is not provided with an auxiliary wind wheel and has the same rotating direction as the inner squirrel-cage rotor; specifically, when the inner squirrel-cage rotor is dragged by the main wind wheel to start rotating, the angular speed of the inner squirrel-cage rotor is set to be omega 1, because the outer permanent magnet rotor is static at the moment, the inner squirrel-cage rotor cuts the permanent magnet field at the angular speed omega 1, electromotive force can be induced inside the squirrel-cage bars, and because the short circuit rings at the end parts of the squirrel-cage bars enable the inner squirrel-cage rotor to form a closed loop, current can be induced inside the squirrel-cage bars; with the increasing of the rotating speed of the inner squirrel-cage rotor, the outer permanent magnet rotor can be driven to rotate in the same way as the inner squirrel-cage rotor, and electromotive force can be induced in the stator winding in the rotating process of the outer permanent magnet rotor and the inner squirrel-cage rotor; when the speed omega 1 of the inner squirrel-cage rotor exceeds the synchronous speed omega s, the outer permanent magnet rotor rotates at the speed of a synthetic magnetic field, and under the action of the magnetic field synthesized by the inner squirrel-cage rotor, the outer permanent magnet rotor and the stator winding together, the stator winding can generate electric energy and is connected to a power grid, so that the electric energy can be transmitted to the power grid;
(II) the inner squirrel-cage rotor operates at super-synchronous speed, the outer permanent magnet rotor is provided with an auxiliary wind wheel and rotates in the opposite direction to the inner squirrel-cage rotor, and the method comprises the following specific steps: when the inner squirrel-cage rotor is dragged by the main wind wheel to start rotating, the angular speed of the inner squirrel-cage rotor is set to be omega 1, the outer permanent magnet rotor is dragged by the auxiliary wind wheel to run in the reverse direction of the inner squirrel-cage rotor, the angular speed of the outer permanent magnet rotor is set to be omega 2, the inner squirrel-cage rotor cuts the permanent magnet field at the relative angular speed of omega 1+ omega 2, so that high electromotive force is quickly induced in the squirrel-cage bars, and the short-circuit rings at the end parts of the squirrel-cage bars enable the inner squirrel-cage rotor to form a closed loop, so that current can be induced in the squirrel-cage bars; with the continuous increase of the rotating speed of the inner squirrel-cage rotor, the outer permanent magnet rotor is also driven by the auxiliary wind wheel to rotate reversely to the inner squirrel-cage rotor and the rotating speed is increased, and electromotive force can be induced in the stator winding in the process that the outer permanent magnet rotor and the inner squirrel-cage rotor rotate in opposite directions; when the speed of the inner squirrel-cage rotor exceeds the synchronous speed omega s, the stator winding can generate electric energy under the action of a magnetic field formed by the inner squirrel-cage rotor, the outer permanent magnet rotor and the stator winding together, and the stator winding is connected into a power grid to transmit the electric energy to the power grid.
Compared with the prior art, the invention has the following beneficial effects:
(1) the double-rotor induction wind driven generator is particularly suitable for wind power generation in severe environment areas, flexible grid connection can be achieved through asynchronous operation of the inner squirrel-cage rotor in the process of wind speed change, therefore, no current transformation equipment is needed, an additional excitation device in the starting process is not needed due to the existence of the outer permanent magnet rotor, the diameter of the generator is designed to be large enough, a gear transmission system of a wind power generation system can be completely omitted, the fault rate can be reduced, and the reliability of the system can be improved.
(2) The torque density of the generator is in direct proportion to the air gap surface area and the air gap magnetic density value of the generator, the double-rotor induction wind driven generator increases the air gap surface area, enhances the air gap magnetic field by arranging the permanent magnet, improves the torque density of the generator, enables the air gap magnetic densities of the inner squirrel-cage rotor and the outer permanent magnet rotor to be in sinusoidal distribution, and can ensure that the induction potential of a stator winding is in sinusoidal distribution.
(3) The permanent magnets are arranged, so that the air gap magnetic field is enhanced, the exciting current absorbed from the power grid in the starting process and normal operation of the wind driven generator is reduced, and the supply of reactive power from the power grid is reduced.
In summary, the dual-rotor induction wind power generator combines the advantages of the permanent magnet synchronous generator and the common induction generator, works as the common induction generator, and can realize flexible grid-connected operation with a power grid, so that an electric energy conversion device is not needed. In addition, the provision of the freely rotatable outer permanent magnet rotor reduces the reactive power demand on the grid, so that the dual rotor induction wind power generator can be operated at low speed like a synchronous generator.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
FIG. 1 is a schematic axial sectional view of a dual rotor induction wind turbine according to the present invention;
FIG. 2 is a schematic view of a radial cross-section structure of a dual rotor induction wind turbine according to the present invention;
FIG. 3 is a schematic diagram of the connection of the A-phase winding of the stator of the double-rotor induction wind driven generator (the figure shows a winding structure with the number of slots per pole and per phase being 1 and the pitch being integral);
fig. 4 is a diagram of a dual-rotor induction wind power generator and a grid-connected system thereof.
In the figure: 1-a first side end cover, 2-a machine shell, 3-an outer permanent magnet rotor, 4-a permanent magnet, 5-an outer air gap, 6-a stator, 7-an inner air gap, 8-a stator winding, 9-an inner squirrel cage rotor, 10-a machine shell bearing, 11-a rotating shaft, 12-an auxiliary wind wheel, 13-a magnetic conductive sleeve, 14-a bearing, 16-a main wind wheel, 17-a second side end cover and 18-a connecting plate.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the following explains the present solution by way of specific embodiments and with reference to the accompanying drawings.
Example 1
A double-rotor induction wind driven generator comprises a shell 2, wherein a first side surface end cover 1 is arranged on the left side of the shell 2, a second side surface end cover 17 is arranged on the right side of the shell 2, the shell 2 is rotatably connected with a rotating shaft 11, a stator 6 and a rotor are arranged in the shell 2, the rotor comprises an inner squirrel-cage rotor 9 and an outer permanent magnet rotor 3, the stator 6 is arranged between the inner squirrel-cage rotor 9 and the outer permanent magnet rotor 3, the stator 6 is fixedly connected with the second side surface end cover 17 through a connecting plate 18, the inner squirrel-cage rotor 9 is fixedly connected with the rotating shaft 11, an outer air gap 5 is arranged between the outer permanent magnet rotor 3 and the stator 6, and an inner air gap 7 is arranged between the stator 6 and the inner squirrel-; the outer permanent magnet type rotor 3 comprises a permanent magnet 4 and a magnetic conduction sleeve 13, the permanent magnet 4 is fixedly arranged on the inner wall of the magnetic conduction sleeve 13, and the magnetic conduction sleeve 13 is rotatably connected with the rotating shaft 11 and the machine shell 2; a main wind wheel 16 is fixedly installed at one end of the rotating shaft 11, an auxiliary wind wheel 12 is fixedly connected at one end of the magnetic conduction sleeve 13, and the main wind wheel 16 and the auxiliary wind wheel 12 are respectively arranged at the outer sides of the second side surface end cover 17 and the first side surface end cover 1; one end of the rotating shaft is connected with a second side surface end cover 17 through a machine shell bearing 10, the other end of the rotating shaft is connected with a magnetic conduction sleeve 13 through a bearing 14, and the magnetic conduction sleeve 13 is connected with a first side surface end cover 1 through the machine shell bearing 10; the central line of the stator 6, the central line of the magnetic conducting sleeve 13 and the central line of the inner squirrel cage rotor 9 are on the same straight line.
The inner squirrel-cage rotor 9 comprises an inner squirrel-cage rotor iron core and squirrel-cage bars, and the squirrel-cage bars are uniformly fixed in iron core grooves on the outer circumference of the inner squirrel-cage rotor.
The stator 6 comprises a stator core and a stator winding 8, the stator winding 8 is installed in a groove of the stator core, and the stator winding 8 is a three-phase back-to-back annular double-layer symmetrical alternating current winding.
And the flux linkage generated by the permanent magnet 4 and the flux linkage of the induction current of the inner squirrel cage rotor simultaneously induce the flux linkage with the stator winding 8. The number of pole pairs of the outer permanent magnet rotor 3 is the same as that of the pole pairs generated by the stator winding 8; the magnetizing direction of the permanent magnet 4 is radial magnetizing.
The double-rotor induction wind driven generator is particularly suitable for wind power generation in severe environment areas, the inner squirrel-cage rotor 9 and the synchronous rotating magnetic field of the generator run asynchronously in the process of wind speed change, the outer permanent magnet rotor 3 and the synchronous rotating magnetic field of the generator run synchronously, and flexible grid connection can be realized, so that no converter is needed, an additional excitation device in the starting process is not needed due to the existence of the outer permanent magnet rotor 3, as long as the diameter of the generator is designed to be large enough, a gear transmission system of a wind power generation system can be completely omitted, the failure rate can be reduced, and the reliability of the system can be improved. The torque density of the generator is in direct proportion to the air gap surface area and the air gap magnetic density value of the generator, the double-rotor induction wind driven generator increases the air gap surface area, the permanent magnet 4 is arranged to enhance the air gap magnetic field, the torque density of the generator is improved, the air gap magnetic densities of the inner squirrel-cage rotor 9 and the outer permanent magnet rotor 3 are distributed in a sine mode, and the induction potential of the stator winding 8 can be distributed in a sine mode. The permanent magnet 4 is arranged to enhance the air gap magnetic field, so that the exciting current absorbed from the power grid in the starting process and normal operation of the wind driven generator is reduced, and the supply of the reactive power of the power grid is reduced.
In summary, the dual-rotor induction wind power generator combines the advantages of the permanent magnet synchronous generator and the common induction generator, works as the common induction generator, and can realize flexible grid-connected operation with a power grid, so that an electric energy conversion device is not needed. In addition, the outer permanent magnet type rotor capable of rotating freely is arranged, so that the reactive power requirement on a power grid is reduced. Therefore, the dual rotor induction wind power generator can be operated at a low speed like a synchronous generator.
Example 2
The difference from example 1 is that: the stator core is internally and externally grooved, the stator winding 8 is annularly distributed and wound in the stator inner and outer grooves, namely, one side of the coil is arranged in the outer groove of the stator core 6, and the other side of the coil is arranged in the inner groove of the stator core 6.
Example 3
The working method of the double-rotor induction wind driven generator comprises the following two working methods according to the different running directions of the outer permanent magnet rotor 3:
the inner squirrel-cage rotor 9 operates at an ultra-synchronous speed, and the outer permanent magnet rotor 3 is not provided with an auxiliary wind wheel 12 and has the same rotating direction as the inner squirrel-cage rotor 9; specifically, the method comprises the following steps: when the inner squirrel-cage rotor 9 is dragged by the main wind wheel 16 to start rotating, the angular speed of the inner squirrel-cage rotor 9 is set to be omega 1, because the outer permanent magnet rotor 3 is static at the moment, the inner squirrel-cage rotor 9 cuts the permanent magnet field at the angular speed omega 1, electromotive force can be induced inside the squirrel-cage bars, and because the short circuit rings at the end parts of the squirrel-cage bars enable the inner squirrel-cage rotor 9 to form a closed loop, current can be induced inside the squirrel-cage bars; with the increasing of the rotating speed of the inner squirrel-cage rotor 9, the outer permanent magnet rotor 3 can be driven to rotate in the same direction as the inner squirrel-cage rotor 9, and electromotive force can be induced in the stator winding 8 in the rotating process of the outer permanent magnet rotor 3 and the inner squirrel-cage rotor 9; when the speed omega 1 of the inner squirrel-cage rotor 9 exceeds the synchronous speed omega s, the outer permanent magnet rotor 3 rotates at the synchronous speed omega s, under the action of a magnetic field jointly synthesized by the inner squirrel-cage rotor 9, the outer permanent magnet rotor 3 and the stator winding 8, the stator winding 8 can generate electric energy, and the stator winding 8 is connected into a power grid and can transmit the electric energy to the power grid;
(II) the inner squirrel-cage rotor 9 operates at super-synchronous speed, the outer permanent magnet rotor 3 is provided with an auxiliary wind wheel 12 and the rotating direction of the outer permanent magnet rotor is opposite to that of the inner squirrel-cage rotor 9, and the method specifically comprises the following steps: when the inner squirrel-cage rotor 9 is dragged by the main wind wheel 12 to start rotating, the angular speed of the inner squirrel-cage rotor 9 is set to be omega 1, the outer permanent magnet rotor 3 is dragged by the auxiliary wind wheel 12 to run in the reverse direction of the inner squirrel-cage rotor 9, the angular speed of the outer permanent magnet rotor 3 is set to be omega 2, the inner squirrel-cage rotor 9 cuts the permanent magnet field at the relative angular speed of omega 1+ omega 2, so that high electromotive force is quickly induced inside the squirrel-cage bars, and the short-circuit rings at the ends of the squirrel-cage bars enable the inner squirrel-cage rotor 9 to form a closed loop, so that current can be induced inside the squirrel-cage bars; with the continuous increase of the rotating speed of the inner squirrel-cage rotor 9, the outer permanent magnet rotor 3 is also driven by the auxiliary wind wheel 12 to rotate at a rotating speed opposite to the rotating speed of the inner squirrel-cage rotor 9, and electromotive force can be induced in the stator winding 8 in the process that the outer permanent magnet rotor 3 and the inner squirrel-cage rotor 9 rotate oppositely; when the speed of the inner squirrel-cage rotor 9 exceeds the synchronous speed omega s, the stator winding 8 can generate electric energy under the action of a magnetic field formed by the inner squirrel-cage rotor 9, the outer permanent magnet rotor 3 and the stator winding 8, and the stator winding 8 is connected into a power grid to transmit the electric energy to the power grid.
The technical features of the present invention that are not described in the present invention can be implemented by or using the prior art, and are not described herein again, of course, the above description is not limited to the present invention, and the present invention is not limited to the above embodiments, and variations, modifications, additions or substitutions that are made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a birotor response aerogenerator, includes casing (2), casing (2) rotatable coupling has pivot (11), be provided with stator (6) and rotor in casing (2), characterized by: the rotor comprises an inner squirrel-cage rotor (9) and an outer permanent magnet rotor (3), the stator (6) is arranged between the inner squirrel-cage rotor (9) and the outer permanent magnet rotor (3), the stator (6) is fixedly connected with the shell (2), the inner squirrel-cage rotor (9) is fixedly connected with the rotating shaft (11), an outer air gap (5) is arranged between the outer permanent magnet rotor (3) and the stator (6), and an inner air gap (7) is arranged between the stator (6) and the inner squirrel-cage rotor (9); the outer permanent magnet type rotor (3) comprises a permanent magnet (4) and a magnetic conduction sleeve (13), the permanent magnet (4) is fixedly arranged on the inner wall of the magnetic conduction sleeve (13), and the magnetic conduction sleeve (13) is rotatably connected with the rotating shaft (11) and the shell (2); one end of the rotating shaft (11) is fixedly provided with a main wind wheel (16), and the main wind wheel (16) is arranged on the outer side of the casing (2).
2. The dual rotor induction wind power generator as claimed in claim 1, wherein: one end of the magnetic conduction sleeve (13) is fixedly connected with an auxiliary wind wheel (12), and the auxiliary wind wheel (12) is arranged on the outer side of the machine shell (1).
3. The double rotor induction wind power generator as claimed in claim 1 or 2, wherein: the inner squirrel-cage rotor (9) comprises an inner squirrel-cage rotor iron core and squirrel-cage bars, and the squirrel-cage bars are uniformly distributed in iron core grooves on the outer circumference of the inner squirrel-cage rotor.
4. The double rotor induction wind power generator as claimed in claim 1 or 2, wherein: the stator (6) comprises a stator core and a stator winding (8), the stator winding (8) is installed in a groove of the stator core, and the stator winding (8) is a three-phase back-to-back annular double-layer symmetrical alternating current winding.
5. The dual rotor induction wind power generator as claimed in claim 4, wherein: the stator core is internally and externally grooved, the stator windings (8) are annularly distributed and wound in the internal and external grooves of the stator core, namely, one side of a coil of the stator winding (8) is arranged in the external groove of the stator core (6), and the other side of the coil is arranged in the internal groove of the stator core (6).
6. The dual rotor induction wind power generator as claimed in claim 4, wherein: the number of pole pairs of the outer permanent magnet rotor (3) is the same as the number of pole pairs generated by the stator winding (8);
preferably, the central line of the stator (6), the central line of the magnetic conducting sleeve (13) and the central line of the inner squirrel cage rotor (9) are on the same straight line.
7. The double rotor induction wind power generator as claimed in claim 1 or 2, wherein: one end of the rotating shaft (11) is connected with the casing (2) through a casing bearing (10), the other end of the rotating shaft (11) is connected with a magnetic conduction sleeve (13) through a bearing (14), and the magnetic conduction sleeve (13) is connected with the casing (2) through the casing bearing (10).
8. The double rotor induction wind power generator as claimed in claim 1 or 2, wherein: the magnetizing direction of the permanent magnet (4) is radial magnetizing.
9. A method of operating a dual rotor induction wind power generator as claimed in any one of claims 1 to 8, characterized by: according to the difference of the running direction of the outer permanent magnet rotor (3), the following two working methods are included:
the inner squirrel-cage rotor (9) runs at super-synchronous speed, and the outer permanent magnet rotor (3) is not provided with an auxiliary wind wheel (12) and has the same rotating direction with the inner squirrel-cage rotor (9);
and (II) the inner squirrel-cage rotor (9) runs at super-synchronous speed, and the outer permanent magnet rotor (3) is provided with an auxiliary wind wheel (12) and has the opposite rotation direction to the inner squirrel-cage rotor (9).
10. The operating method of the double rotor induction wind power generator as claimed in claim 9, wherein:
the inner squirrel-cage rotor (9) runs at an ultra-synchronous speed, the outer permanent magnet rotor (3) is not provided with an auxiliary wind wheel (12) and is the same as the inner squirrel-cage rotor (9) in the rotating direction, and the method comprises the following specific steps: when the inner squirrel-cage rotor (9) is dragged by the main wind wheel (16) to start rotating, the angular speed of the inner squirrel-cage rotor (9) is set to be omega 1, because the outer permanent magnet rotor (3) is static at the moment, the inner squirrel-cage rotor (9) cuts the permanent magnet field at the angular speed omega 1, electromotive force can be induced inside the squirrel-cage bars, and because the short-circuit rings at the end parts of the squirrel-cage bars enable the inner squirrel-cage rotor (9) to form a closed loop, current can be induced inside the squirrel-cage bars; with the continuous increase of the rotating speed of the inner squirrel-cage rotor (9), the outer permanent magnet rotor (3) can be driven to rotate in the same direction as the inner squirrel-cage rotor (9), and electromotive force can be induced in the stator winding (8) in the rotating process of the outer permanent magnet rotor (3) and the inner squirrel-cage rotor (9); when the speed omega 1 of the inner squirrel-cage rotor (9) exceeds the synchronous speed omega s, the outer permanent magnet rotor (3) can rotate at the synchronous speed omega s, under the action of a magnetic field jointly synthesized by the inner squirrel-cage rotor (9), the outer permanent magnet rotor (3) and the stator winding (8), the stator winding (8) can generate electric energy, and the stator winding (8) is connected into a power grid and can transmit the electric energy to the power grid;
(II) the inner squirrel-cage rotor (9) runs at super-synchronous speed, the outer permanent magnet rotor (3) is provided with an auxiliary wind wheel (12) and the rotating direction of the outer permanent magnet rotor is opposite to that of the inner squirrel-cage rotor (9), and the method specifically comprises the following steps: when the inner squirrel-cage rotor (9) is dragged by the main wind wheel (12) to start rotating, the angular speed of the inner squirrel-cage rotor (9) is set to be omega 1, the outer permanent magnet rotor (3) can be dragged by the auxiliary wind wheel (12) to run in the reverse direction of the inner squirrel-cage rotor (9), the angular speed of the outer permanent magnet rotor (3) is set to be omega 2, the inner squirrel-cage rotor (9) cuts the permanent magnet field at the relative angular speed of omega 1+ omega 2, so that high electromotive force is quickly induced in the squirrel-cage bars, and the short-circuit rings at the end parts of the squirrel-cage bars enable the inner squirrel-cage rotor (9) to form a closed loop, so that current can be induced in the squirrel-cage bars; along with the continuous increase of the rotating speed of the inner squirrel-cage rotor (9), the outer permanent magnet rotor (3) is also driven by the auxiliary wind wheel (12) to rotate at a rotating speed opposite to the rotating speed of the inner squirrel-cage rotor (9), and electromotive force can be induced in the stator winding (8) in the process that the outer permanent magnet rotor (3) and the inner squirrel-cage rotor (9) rotate oppositely; when the speed of the inner squirrel-cage rotor (9) exceeds the synchronous speed omega s, the stator winding (8) can generate electric energy under the action of a magnetic field formed by the inner squirrel-cage rotor (9), the outer permanent magnet rotor (3) and the stator winding (8) together, and the stator winding (8) is connected into a power grid to transmit the electric energy to the power grid.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910892311.6A CN110601479B (en) | 2019-09-20 | 2019-09-20 | Double-rotor induction wind driven generator and working method thereof |
| AU2020217397A AU2020217397B2 (en) | 2019-09-20 | 2020-08-13 | Double-rotor induction wind power generator and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910892311.6A CN110601479B (en) | 2019-09-20 | 2019-09-20 | Double-rotor induction wind driven generator and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110601479A true CN110601479A (en) | 2019-12-20 |
| CN110601479B CN110601479B (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910892311.6A Active CN110601479B (en) | 2019-09-20 | 2019-09-20 | Double-rotor induction wind driven generator and working method thereof |
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|---|---|---|---|---|
| CN113691093A (en) * | 2021-07-30 | 2021-11-23 | 齐鲁工业大学 | Outer rotor permanent magnet induction motor and working method |
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| AU2022281470B2 (en) * | 2021-05-26 | 2023-02-02 | Manuel Barreiro | Generator |
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| CN1976205A (en) * | 2006-12-14 | 2007-06-06 | 天津市新源电气科技有限公司 | Telescopic double-rotor wind electric exciting method and control system, and electric generator thereof |
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Also Published As
| Publication number | Publication date |
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| CN110601479B (en) | 2021-10-29 |
| AU2020217397A1 (en) | 2021-04-08 |
| AU2020217397B2 (en) | 2021-05-13 |
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Application publication date: 20191220 Assignee: Shandong Rongtang Electric Power Technology Co.,Ltd. Assignor: Qilu University of Technology Contract record no.: X2023980048595 Denomination of invention: A dual rotor induction wind turbine and its working method Granted publication date: 20211029 License type: Common License Record date: 20231205 |
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