CN113949245A - Space magnetic resistance biconvex pole excitation wind driven generator - Google Patents
Space magnetic resistance biconvex pole excitation wind driven generator Download PDFInfo
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- CN113949245A CN113949245A CN202111294203.2A CN202111294203A CN113949245A CN 113949245 A CN113949245 A CN 113949245A CN 202111294203 A CN202111294203 A CN 202111294203A CN 113949245 A CN113949245 A CN 113949245A
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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
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
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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
- H02K21/02—Details
- H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
- H02K21/046—Windings on magnets for additional excitation ; Windings and magnets for additional excitation with rotating permanent magnets and stationary field winding
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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
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/32—Arrangements for controlling wound field motors, e.g. motors with exciter coils
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- Synchronous Machinery (AREA)
Abstract
The invention relates to a space magnetic resistance double salient pole excitation wind driven generator, which comprises an outer stator, a compound rotor, an inner stator, a rectifying circuit and an excitation controller, wherein the outer stator is connected with the compound rotor through a magnetic field; the rectifying circuit comprises a first rectifying circuit and a second rectifying circuit; the composite rotor is positioned between the outer stator and the inner stator, the first excitation winding and the second excitation winding are respectively connected to different control circuits of an excitation controller, the first armature winding and the second armature winding respectively and independently form a phase and are respectively connected with a first rectifying circuit and a second rectifying circuit, and the angle position of the inner rotor tooth pole relative to the outer rotor tooth pole is deviated by one third of an electric angle, so that torque fluctuation peaks and valleys on the inner rotor tooth pole and the outer rotor tooth pole are mutually offset, and the comprehensive torque fluctuation of the space reluctance double salient pole excitation wind driven generator is greatly reduced.
Description
Technical Field
The invention relates to the technical field of wind driven generators, in particular to a space magnetic resistance doubly salient excitation wind driven generator.
Background
The double salient pole direct current excitation generator has the characteristics of simple structure, high reliability, low cost and the like due to no winding, no magnetic steel, no brush and the like on a rotor, and becomes a new research direction in the field of alternating current generators and control thereof. The space magnetic resistance double salient pole excitation wind power generator is an innovative product developed on the basis of a double salient pole direct current excitation generator, has all the advantages of the double salient pole direct current excitation generator, simultaneously expands the magnetic circuit space structure, and improves the internal space utilization rate of a rotor of the wind power generator, thereby effectively improving the volume power density of the low-rotating-speed wind power generator, showing the characteristics of simple structure and manufacturing process, high reliability, low cost and the like of the double salient pole wind power generator, and being particularly suitable for low-rotating-speed direct-drive or semi-direct-drive high-power wind power generation.
The double salient pole generator used at home and abroad at present consists of a rotor and a stator which are in a single radial structure, and the prior patent CN1099155C discloses a double salient pole brushless direct current generator which is characterized in that the rotor rotates inside the single stator structurally, a radial magnetic circuit is generated through a radial air gap, the outer diameter of the stator and the length of a rotor core need to be increased when the output torque or power is increased, the size of a machine body is large, the double salient pole generator can be used as a high-rotating-speed double-fed wind power generator, but the double salient pole generator is not suitable for being used as a low-rotating-speed direct-drive or semi-direct-drive wind power generator.
The prior patent CN101183804 discloses a three-phase external rotor electro-magnetic doubly salient wind generator, a single stator of which is located inside an external rotor, and a radial magnetic circuit is generated through a radial air gap, so that the three-phase external rotor electro-magnetic doubly salient wind generator can be only applied to low-speed semi-direct-drive wind power generation, and the volume power density of the wind generator is low when the wind generator generates electricity at a low speed, and the internal space of the stator is not utilized.
The prior patent CN207150326U discloses an asymmetric excitation stator stagger angle doubly salient motor, which specifically discloses that two groups of salient pole stators, two groups of salient pole rotors, two groups of stator windings, a magnetic conductive material covering the motor shaft, and a central electric excitation coil are axially arranged in the same motor shaft direction. The motor has longer axial dimension and is not suitable for being used as a low-rotation-speed wind driven generator. But this utility model discloses an adopt along the two sets of biconvex machine stators of motor axial installation, reduced the torque pulsation based on the torque stack principle.
In conclusion, it is urgently needed to innovatively design a wind driven generator with high volume power density at low rotating speed, simple structure and manufacturing process, good reliability and low cost, and is suitable for being made into a disc-shaped low-rotating-speed wind driven generator.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a low-rotating-speed brushless direct-current wind driven generator which is compact in magnetic circuit structure space layout, high in reliability and simple in manufacturing process and is suitable for being made into a disc shape, and aims to improve the volume power density.
The following technical scheme is adopted: specifically, on the one hand, the technical scheme provided by the invention is as follows: a space magnetic resistance double salient pole excitation wind driven generator comprises an outer stator, a compound rotor, an inner stator, a rectifying circuit and an excitation controller; the rectifying circuit comprises a first rectifying circuit and a second rectifying circuit; the composite rotor comprises an outer stator, an inner stator, a composite rotor, a first excitation winding, a second excitation winding, a first rectification circuit and a second rectification circuit, wherein the outer stator is provided with the first armature winding and the first excitation winding, the inner stator is provided with the second armature winding and the second excitation winding, the composite rotor is positioned between the outer stator and the inner stator, the first excitation winding and the second excitation winding are respectively connected to different control circuits of an excitation controller, and the first armature winding and the second armature winding are respectively independent to form a phase and are respectively connected with the first rectification circuit and the second rectification circuit.
On the other hand, the invention provides a space magnetic resistance double salient pole excitation wind driven generator, which comprises an outer stator, a compound rotor, an inner stator, a rectifying circuit and an excitation controller, wherein the outer stator is connected with the compound rotor; the outer stator is provided with a first armature winding and a first excitation winding, and the inner stator is provided with a second armature winding and a second excitation winding; the compound rotor is positioned between the outer stator and the inner stator;
the first armature winding and the second armature winding are connected in series to form a phase to be connected with a rectifying circuit, and the first excitation winding and the second excitation winding are connected in series and then connected with the excitation controller.
Preferably, the teeth of the inner stator and the outer stator are distributed at equal intervals along the circumference, and the distribution interval is 360 ° per 6N of one stator pole pitch, wherein 6N is the number of stator poles, and N is 1, 2, 3, 4.
Preferably, the inner rotor teeth pole and the outer rotor teeth pole of the compound rotor are distributed at equal intervals along the circumference, the distribution interval is 360 DEG/4N of one rotor pole pitch, wherein 4N is the number of the disc rotor poles, and N is 1, 2, 3 and 4.
Preferably, the first excitation winding and the second excitation winding respectively provide direct current excitation for the outer stator and the inner stator to generate constant magnetic potential.
Preferably, the compound rotor comprises inner and outer rotor teeth having the same number of pole pairs.
Preferably, the inner rotor teeth are angularly offset by one third of the electrical angle relative to the outer rotor teeth.
Preferably, the outer stator has a first yoke portion, the inner stator has a second yoke portion, and the multiple rotor includes yoke portions, and the first and second yoke portions are independent of each other and have magnetic fluxes commonly passing through the yoke portions of the multiple rotor.
Preferably, when the first excitation winding is electrified, a loop is formed through the first yoke part, the outer stator/outer rotor air gap and the outer rotor tooth pole and the yoke part of the compound rotor; when the second excitation winding is electrified, a loop is formed through the second yoke part, the inner stator/inner rotor air gap, the inner rotor tooth pole and the yoke part of the compound rotor.
Preferably, the first rectification circuit and the second rectification circuit both provide three-phase alternating current rectification and output direct current power generation.
Preferably, two independent generator circuits are formed by the first rectifying circuit, the second rectifying circuit and the first electromagnetic winding and the second electromagnetic winding, the same direct-current voltage is output, and the loads are driven in parallel.
Preferably, the angular positions of the inner and outer rotor teeth are centrally aligned.
Preferably, the outer stator has a first yoke portion, the inner stator has a second yoke portion, and the multiple rotor includes a yoke portion, and the first yoke portion passes through the yoke portion of the multiple rotor and the other portion enters the inner stator second yoke portion.
Preferably, when the first excitation winding is energized, one part of the first excitation winding is magnetized to pass through the first yoke part and the outer stator/outer rotor air gap, the outer rotor pole and the compound rotor yoke part form a loop, the other part of the first excitation winding is magnetized to pass through the first yoke part and the outer stator/outer rotor air gap, the loop is formed by the outer rotor pole, the inner rotor/inner stator air gap and the second yoke part, and when the second excitation winding is energized, the magnetic flux passes through the second yoke part and the inner stator/inner rotor air gap, and the loop is formed by the inner rotor pole, the outer rotor/outer stator air gap and the first yoke part.
Preferably, the rectifier circuit provides a three-phase rectified dc power generation output.
Preferably, the first armature winding and the second armature winding are connected in series, the first excitation winding and the second excitation winding are connected in series, a motor circuit is formed through a common rectifying circuit, and a direct-current voltage is output to drive a load.
Compared with the prior art, the invention has the following beneficial effects:
(1) because the inner stator and the outer stator can generate power simultaneously when the compound rotor rotates, the power generation power is effectively improved within the given range of the outer diameter of the generator, and the volume power density of the wind driven generator is greatly improved. .
(2) When the centers of the inner and outer gear poles of the compound rotor are offset by one third of the electrical angle, the comprehensive torque fluctuation amplitude on the rotor is greatly reduced because the two torque fluctuation phase offsets on the inner rotor gear pole and the outer rotor gear pole cause the torque peak-valley complementation.
(3) The space reluctance direct current excitation wind driven generator greatly improves the volume power density during low-speed power generation, greatly reduces torque fluctuation, and simultaneously fully exerts the advantages of low cost, simple production and assembly processes and the like brought by the characteristics of no permanent magnet, no winding, no electric brush and the like of a generator rotor.
(4) When the space reluctance direct current excitation wind driven generator is used, the controller does not need to use a high-power high-frequency IGBT and only needs to use a diode for filtering and rectifying to output direct current, so that the controller is low in cost, high in conversion efficiency (the switching loss of the diode is very low), greatly improved in reliability (the diode has no failure mode), wide in application prospect in the application field of the offshore wind driven generator, great in application advantage in low-rotation-speed direct-drive or semi-direct-drive wind power generation, and important in significance.
Drawings
FIG. 1a is a schematic diagram of a compound rotor internal and external teeth center offset structure of a space reluctance generator; FIG. 1b is a schematic diagram of a center coincidence structure of inner and outer teeth of a compound rotor of a space reluctance generator;
FIG. 2a is a schematic view of a magnetic circuit structure of a compound rotor of a space reluctance generator when the centers of inner and outer teeth are shifted; FIG. 2b is a schematic view of a magnetic circuit structure when the centers of inner and outer teeth of a compound rotor of a space reluctance generator coincide;
FIG. 3 is a schematic diagram of a circuit structure when the armature windings and the field windings of the inner and outer stators are fully connected in series;
fig. 4 is a schematic circuit structure diagram when the inner and outer stator armature windings and the field winding are separately connected.
The reference numbers are as follows:
wherein, 1-an outer stator; 2-a compound rotor; 3-an inner stator; 4-inner rotor teeth pole; 5-outer rotor tooth pole; 6-a second armature winding; 7-a second excitation winding; 8-a first armature winding; 9-a first excitation winding; 20-a rectifying circuit; 21-a first rectifying circuit; 22-a second rectifying circuit; 26-a rectifier controller; 27-an excitation controller; 30-a second yoke; 31-a first yoke; 32-a yoke; 40-load.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1a, the present invention provides a space reluctance doubly salient excitation wind power generator, which comprises an outer stator 1, a compound rotor 2, an inner stator 3, a rectification circuit 20 and an excitation circuit, wherein the rectification circuit comprises a first rectification circuit 21 and a second rectification circuit 22; an outer stator 1 and an inner stator 3 of the wind driven generator are both provided with an armature winding and an excitation winding, specifically, the outer stator 1 is provided with a first armature winding 8 and a first excitation winding 9, and the inner stator 3 is provided with a second armature winding 6 and a second excitation winding 7; the compound rotor 2 is positioned between the outer stator 1 and the inner stator 3, the first excitation winding 9 and the second excitation winding 7 are respectively connected to different control circuits of an excitation controller 27, and the first armature winding and the second armature winding respectively and independently form a phase and are respectively connected with a first rectifying circuit and a second rectifying circuit. The compound rotor 2 of the wind turbine has no permanent magnets, no windings and no commutators, wherein the compound rotor 2 has inner rotor teeth 4 and outer rotor teeth 5 and has the same pole pair number. The rectifying circuit provides three-phase rectifying direct current power generation output for the outer stator 1 and the inner stator 3, and the exciting circuit provides direct current excitation for the outer stator 1 and the inner stator 3 to generate constant magnetic potential.
Specifically, when the second excitation winding 7 of the inner stator 3 and the first excitation winding 9 of the outer stator 1 are independently connected to operate (fig. 4), the excitation controller 27 needs to simultaneously control the two IGBTs to perform PWM excitation current adjustment for the two excitation windings, respectively. On the other hand, the compound rotor provides magnetic flux change for the inner stator and the outer stator simultaneously in the low-speed rotation process, and two paths of three-phase alternating current are generated.
The center of the angle position of the inner rotor tooth pole 4 and the outer rotor tooth pole 5 of the compound rotor provided by the invention is relatively shifted by one third of the electrical angle (figure 1a), at this time, the second armature winding 6 and the second excitation winding 7 of the inner stator 3 are respectively and independently connected with the first armature winding 8 and the first excitation winding 9 of the outer stator 1, two independent generator circuits are formed through the independent first rectifying circuit 21 and the independent second rectifying circuit 22 and the independent first excitation winding 9 and the independent second excitation winding 7 respectively, the same direct current voltage is output, and the load 40 is driven in parallel (as shown in figure 4). The mode is that the inner rotor pole and the outer rotor pole are respectively and independently an inner stator excitation magnetic circuit and an outer stator excitation magnetic circuit to independently provide an alternating magnetic circuit through the rotor yoke part, at the moment, the duplex rotor yoke part is wider, the inner rotor tooth pole is deviated by one third of electric angle relative to the tooth pole angle position of the outer rotor, so that torque fluctuation peaks and valleys on the inner rotor tooth pole and the outer rotor tooth pole are mutually offset, and the comprehensive torque fluctuation of the space reluctance doubly salient excitation wind driven generator is greatly reduced, as shown in figure 2 a.
In particular, the angular position centers of the inner rotor teeth 4 and of the outer rotor teeth 5 of the compound rotor are relatively offset by one third of the electrical angle (120 °); the outer stator has a first yoke portion 31, the inner stator has a second yoke portion 30, and the multiple rotor includes a yoke portion 32, when the first yoke portion 31 of the outer stator 1 and the second yoke portion 30 of the inner stator 3 are independently passed through the yoke portion 32 of the multiple rotor 2.
Specifically, the teeth of the inner stator 3 and the teeth of the outer stator 1 are distributed at equal intervals along the circumference, and the distribution interval is 360 ° per 6N, where 6N is the number of poles of the disc stator, and N is 1, 2, 3, 4.
Specifically, the inner rotor teeth and the outer rotor teeth of the compound rotor 2 are distributed at equal intervals along the circumference, the distribution interval is 360 °/4N of one rotor pole pitch, wherein 4N is the number of disc rotor poles, and N is 1, 2, 3 and 4.
As shown in fig. 1b, as another embodiment, the present invention provides that the angular positions of the inner rotor teeth 10 and the outer rotor teeth 11 of the compound rotor are aligned at the center (fig. 1b), and the second armature winding 6 of the inner stator 3 and the first armature winding 8 of the outer stator 1 are all connected in series, and the second field winding 7 and the first field winding 9 are connected in series, and form a motor circuit through a set of rectifying circuit 20, and output a dc voltage to drive the load 40 (fig. 3). One part of excitation magnetic circuits of the inner stator and the outer stator penetrate through the compound rotor to form a loop through the excitation magnetic circuits of the outer stator and the inner stator poles, and the other part of excitation magnetic circuits form a loop through the yoke part of the rotor poles; at this time, the inner rotor pole and the outer rotor pole need to be aligned in the center, and the rotor tooth yoke part is smaller, so that the comprehensive generating power is improved, as shown in fig. 2 b.
The inner stator 3 and the outer stator 1 provided by the invention have the same pole number, are respectively embedded into the first armature winding 8 and the second armature winding 6, and are respectively embedded into the first excitation winding 9 and the second excitation winding 7, and emit three-phase alternating current along with the rotation of the rotor.
Specifically, the inner rotor teeth 4 and the outer rotor teeth 5 of the compound rotor are aligned in the angular position center, the outer stator has a first yoke 31, the inner stator has a second yoke 30, and the compound rotor includes a yoke 32, when the first yoke 31 of the outer stator 1 passes through the yoke 32 of the compound rotor 2 in part and enters the second yoke 30 of the inner stator in part.
Specifically, the teeth of the inner stator 3 and the teeth of the outer stator 1 are distributed at equal intervals along the circumference, and the distribution interval is 360 ° per 6N, where 6N is the number of poles of the disc stator, and N is 1, 2, 3, 4.
Specifically, the inner rotor teeth and the outer rotor teeth of the compound rotor 2 are distributed at equal intervals along the circumference, the distribution interval is 360 °/4N of one rotor pole pitch, wherein 4N is the number of disc rotor poles, and N is 1, 2, 3 and 4.
Specifically, when the second excitation winding 7 of the inner stator 3 is connected in series with the first excitation winding 9 of the outer stator 1 (fig. 3), the rectification controller 26 only needs to control one IGBT to perform PWM excitation current regulation.
The space reluctance direct current excitation wind driven generator has the basic working principle that the excitation windings on the inner stator and the outer stator respectively generate constant magnetic potential in two spaces of the inner stator and the outer stator when passing through constant direct current. When the compound rotor rotates, the rotor tooth poles and the stator tooth poles generate variable magnetic resistance, two paths of independent variable magnetic fluxes are generated on the inner stator tooth pole and the outer stator tooth pole, electric potential is induced in the armature winding, and three-phase alternating current is generated. When the rotating speed changes, the magnitude of the magnetic potential can be adjusted by adjusting the magnitude of the exciting current, and the purpose of maintaining constant voltage power generation output is achieved.
Example 1
The embodiment provides a space magnetic resistance double salient direct current excitation wind driven generator, which comprises an outer stator 1, a compound rotor 2, an inner stator 3, a rectifying circuit, an excitation circuit and an excitation controller 27 (shown in figure 4). The rectifier circuit includes a first rectifier circuit 21 and a second rectifier circuit 22; the outer stator of the wind driven generator is provided with a first armature winding and a first excitation winding, the inner stator is provided with a second armature winding and a second excitation winding, the compound rotor 2 of the wind driven generator is free of permanent magnet, winding and commutator, structurally comprises an inner rotor tooth pole 4 and an outer rotor tooth pole 5 and has the same pole pair number (as shown in figure 1 a). The centers of the inner and outer tooth poles of the compound rotor are mutually offset by one third of an electrical angle (120 degrees), so that torque fluctuation peaks and valleys on the inner and outer tooth poles of the compound rotor are mutually offset, and the total torque fluctuation of the generator rotor is greatly reduced.
At this time, the second armature winding 6 of the inner stator 3 and the first armature winding 8 of the outer stator 1 respectively and independently form a phase to form three-phase windings of A-X, B-Y and C-Z (see fig. 4), and the three-phase windings are respectively connected to the respective first rectifying circuit 21 and second rectifying circuit 22 to generate direct current after independent rectification; the second excitation winding 7 of the inner stator 3 and the first excitation winding 9 of the outer stator 1 are respectively connected to different control circuits of the excitation controller 27, and the excitation currents of the inner stator and the outer stator are respectively and independently adjusted.
The basic working principle is that when the first excitation winding 9 of the outer stator 1 is electrified with constant current, clockwise magnetic flux is generated, passes through the first yoke part 31 of the outer stator and an air gap between the outer stator and an outer rotor, and then forms a loop through the outer rotor teeth 5 and the compound rotor yoke part 32 to generate electromotive force. When the second excitation winding 7 of the inner stator 3 is energized with a constant current, a counterclockwise magnetic flux is generated, passes through the inner stator yoke 30, the inner stator/inner rotor air gap, and then forms a loop through the inner rotor teeth 4 and the compound rotor yoke 32, and electromotive force is generated. Since both the inner and outer magnetic flux circuits pass through the multiple rotor yoke 32, the rotor yoke 32 is required to be increased in thickness to maintain uniform magnetic density throughout the magnetic circuit.
Example 2
As shown in fig. 1b, the centers of the inner and outer teeth of the multiple rotor are coincident without offset, so that the magnetic circuits of the inner stator 3 and the outer stator 1 are shared, the magnetic density of the yoke portion 32 of the multiple rotor 2 is reduced, the thickness of the yoke portion 32 of the multiple rotor is allowed to be reduced, the outer diameter of the inner stator 3 is increased, and thus the power generation power of the inner stator 3 can be increased. At this time, the second armature winding 6 of the inner stator 3 and the first armature winding 8 of the outer stator 1 are combined and connected in series to form a phase to form three-phase windings of A-X, B-Y and C-Z, and the combination is connected to a rectifying circuit 20 to rectify and generate direct current; the second excitation winding 7 of the inner stator 3 and the first excitation winding 9 of the outer stator 1 are connected in series and then connected with the control circuit of the rectification controller 26, and the excitation currents of the inner stator and the outer stator are synchronously adjusted.
The basic working principle is that when the first excitation winding 9 of the outer stator 1 is electrified with constant current, clockwise magnetic flux is generated, wherein a part of the magnetic flux passes through the first yoke part 31 of the outer stator and an outer stator/outer rotor air gap, the outer rotor teeth 5 and the compound rotor yoke part 32 form a loop, and electromotive force is generated in the outer stator; the other part of the magnetic flux passes through the first yoke part 31 of the outer stator and the outer stator/outer rotor air gap, and then forms a loop through the outer rotor tooth pole 5, the inner rotor tooth pole 4, the inner rotor/inner stator air gap and the second yoke part 30 of the inner stator, and electromotive force is generated inside the outer stator.
When the second excitation winding 7 of the inner stator 3 is electrified with constant current, clockwise magnetic flux is generated simultaneously, a loop is formed by the second yoke part 30 of the inner stator and the inner stator/inner rotor air gap, the inner rotor tooth pole 4, the outer rotor tooth pole 5, the outer rotor/outer stator air gap and the first yoke part 31 of the outer stator, and electromotive force is generated in the inner stator. Because only part of the outer stator magnetic flux loop passes through the compound rotor yoke part 32, the magnetic density is lower, so the thickness of the rotor yoke part 32 is correspondingly reduced, the outer diameter of the inner stator is allowed to be increased, and the generating power is increased.
Compared with embodiment 1, the difference is that the partial outer stator magnetic circuit and the whole inner stator magnetic circuit are formed into a loop by crossing the outer stator 1 and the inner stator 3 through the compound rotor 2 in space.
Those of ordinary skill in the art will understand that: the invention is not to be considered as limited to the specific embodiments thereof, but is to be understood as being modified in all respects, all changes and equivalents that come within the spirit and scope of the invention.
Claims (16)
1. A space magnetic resistance double salient pole excitation wind driven generator is characterized by comprising an outer stator, a compound rotor, an inner stator, a rectifying circuit and an excitation controller; the rectifying circuit comprises a first rectifying circuit and a second rectifying circuit; the composite rotor comprises an outer stator, an inner stator, a composite rotor, a first excitation winding, a second excitation winding, a first rectification circuit and a second rectification circuit, wherein the outer stator is provided with the first armature winding and the first excitation winding, the inner stator is provided with the second armature winding and the second excitation winding, the composite rotor is positioned between the outer stator and the inner stator, the first excitation winding and the second excitation winding are respectively connected to different control circuits of an excitation controller, and the first armature winding and the second armature winding are respectively independent to form a phase and are respectively connected with the first rectification circuit and the second rectification circuit.
2. A space magnetic resistance double salient pole excitation wind driven generator is characterized by comprising an outer stator, a compound rotor, an inner stator, a rectifying circuit and an excitation controller; the outer stator is provided with a first armature winding and a first excitation winding, and the inner stator is provided with a second armature winding and a second excitation winding; the compound rotor is positioned between the outer stator and the inner stator;
the first armature winding and the second armature winding are connected in series to form a phase to be connected with a rectifying circuit, and the first excitation winding and the second excitation winding are connected in series and then connected with the excitation controller.
3. The spatial reluctance doubly salient excitation wind turbine generator according to claim 1 or 2, wherein the teeth of the inner stator and the outer stator are distributed at equal intervals along the circumference, and the distribution interval is 360 °/6N, wherein 6N is the number of stator poles, and N is 1, 2, 3, 4.
4. A space reluctance doubly salient excitation wind-driven generator as claimed in claim 1 or 2, characterized in that, the inner rotor teeth pole and the outer rotor teeth pole of the compound rotor are distributed along the circumference at equal intervals, the distribution interval is 360 °/4N of a rotor pole pitch, wherein 4N is the number of disk rotor poles, and N is 1, 2, 3, 4.
5. The spatial reluctance doubly salient excitation wind generator according to claim 1 or 2, wherein the first excitation winding and the second excitation winding respectively provide direct current excitation for the outer stator and the inner stator to generate constant adjustable magnetic potential.
6. A space reluctance doubly salient excitation wind-driven generator according to claim 1 or 2, wherein said compound rotor comprises inner rotor teeth and outer rotor teeth, said inner rotor teeth and said outer rotor teeth having the same pole pair number.
7. The spatial reluctance doubly salient excitation wind-driven generator of claim 6, wherein the inner rotor teeth are angularly offset by one-third of an electrical angle relative to the outer rotor teeth.
8. The wind turbine of claim 7, wherein the outer stator has a first yoke portion, the inner stator has a second yoke portion, and the multiple rotor comprises a yoke portion, and the first yoke portion and the second yoke portion are independent of each other, and the magnetic fluxes of the first yoke portion and the second yoke portion jointly pass through the yoke portion of the multiple rotor.
9. The wind driven generator with space reluctance and double salient poles excitation as claimed in claim 8, wherein when the first excitation winding is energized, a loop is formed through the first yoke part, the outer stator/outer rotor air gap, and then the outer rotor teeth and the yoke part of the compound rotor; when the second excitation winding is electrified, a loop is formed through the second yoke part, the inner stator/inner rotor air gap, the inner rotor tooth pole and the yoke part of the compound rotor.
10. The spatial reluctance doubly salient excitation wind turbine generator of claim 9, wherein the first rectification circuit and the second rectification circuit respectively provide three-phase ac rectified output dc power generation.
11. The wind driven generator with space reluctance and double salient poles excitation as claimed in claim 9, wherein two independent generator circuits are formed by the first rectifying circuit, the second rectifying circuit and the first electromagnetic winding and the second electromagnetic winding, and output the same direct current voltage to drive the load in parallel.
12. The spatial reluctance doubly salient excitation wind-driven generator of claim 6, wherein the angular positions of the inner rotor teeth and the outer rotor teeth are aligned centrally.
13. The wind turbine of claim 12, wherein the outer stator has a first yoke portion, the inner stator has a second yoke portion, and the multiple rotor comprises a yoke portion, and the first yoke portion has a magnetic flux passing through the yoke portion of the multiple rotor in a portion and entering the second yoke portion of the inner stator in another portion.
14. The wind turbine generator with space reluctance and double salient poles excitation of claim 13, wherein when the first excitation winding is energized, one part of the first excitation winding is magnetically passed through the first yoke, the outer stator/outer rotor air gap, the outer rotor pole and the compound rotor yoke form a loop, and the other part of the first excitation winding is magnetically passed through the first yoke, the outer stator/outer rotor air gap, and then a loop is formed through the outer rotor pole, the inner rotor/inner stator air gap, and the second yoke, and when the second excitation winding is energized, the magnetic flux is passed through the second yoke, the inner stator/inner rotor air gap, and then a loop is formed through the inner rotor pole, the outer rotor/outer stator air gap, and the first yoke.
15. The spatial reluctance doubly salient excitation wind turbine of claim 14, wherein the rectification circuit provides a three-phase rectified dc power generation output.
16. The wind turbine generator with space reluctance and double salient poles excitation as claimed in claim 14, wherein the first armature winding and the second armature winding are connected in series, the first excitation winding and the second excitation winding are connected in series, a motor circuit is formed by a common rectification circuit, and a load is driven by an output direct current voltage.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114553076A (en) * | 2022-02-07 | 2022-05-27 | 苏州达思灵新能源科技有限公司 | Micro-torque fluctuation doubly salient direct-current excitation generator |
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| US20170019005A1 (en) * | 2014-04-02 | 2017-01-19 | Ihi Corporation | Double-stator switched reluctance rotating machine |
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| CN101042112A (en) * | 2007-04-16 | 2007-09-26 | 顾为东 | High efficiency low cost high power non-interconnected wind-driven generator group |
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