CN108365718B - A kind of birotor permanent magnetic doubly-fed wind turbine and electricity generation system - Google Patents
A kind of birotor permanent magnetic doubly-fed wind turbine and electricity generation system Download PDFInfo
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- CN108365718B CN108365718B CN201810136637.1A CN201810136637A CN108365718B CN 108365718 B CN108365718 B CN 108365718B CN 201810136637 A CN201810136637 A CN 201810136637A CN 108365718 B CN108365718 B CN 108365718B
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- 230000005611 electricity Effects 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 54
- 230000004907 flux Effects 0.000 claims abstract description 22
- 239000000696 magnetic material Substances 0.000 claims abstract description 8
- 230000005389 magnetism Effects 0.000 claims abstract description 7
- 230000035699 permeability Effects 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims description 32
- 239000002131 composite material Substances 0.000 claims description 7
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000009826 distribution Methods 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
- 238000011160 research Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
-
- 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
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- H02K11/046—
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
- H02P21/26—Rotor flux based control
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
- H02P21/28—Stator flux based control
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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
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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
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention provides a kind of birotor permanent magnetic doubly-fed wind turbine and electricity generation system, and permanent magnet outer rotor pastes magnet structure using permeability magnetic material surfaces externally and internally, and surfaces externally and internally permanent magnetism body position corresponds to each other.The air gap flux density of motor gas-gap can be improved in the magnet structure.The torque density of motor is directly proportional to motor gas-gap surface area, air gap flux density value, birotor permanent magnetic doubly-fed wind turbine of the invention, increase air gap surface product, and increased outer rotor magnet all increases air gap flux density using special magnet structure, to improve the torque density of motor.The inner and outer rotors structure that birotor permanent magnetic doubly-fed wind turbine uses, it not only improves inner and outer Rotator air gap flux density, inner and outer rotors is made to grip the reduction of portion's flux density, to improve the operational efficiency and torque density of motor, and make inner and outer rotors air gap flux density in Sine distribution, winding potential can be guaranteed in Sine distribution.
Description
Technical field
The present invention relates to technical field of new energy power generation more particularly to a kind of birotor permanent magnetic doubly-fed wind turbine and
Electricity generation system.
Background technique
Clean wind energy is a kind of most active one of renewable energy, is deteriorated in face of energy crisis and earth environment
Dual-pressure, the development and utilization of wind energy is by global concern.Traditional wind generallys use magneto alternator
Or common influence generator, but both the above generator can not achieve variable speed constant frequency operation, the transformation efficiency of wind energy is low.Closely
A little years, the double-fed generator that can be realized variable speed constant frequency efficiency power generation become the research hotspot of wind-power electricity generation, but common double-fed wind
There is also distinct issues for power generator, such as low voltage ride-through capability is weak, excitation capacity is big.
In order to further increase the runnability of doubly-fed wind turbine, both at home and abroad to the research master of double-fed generator
Two aspects are concentrated on, that on the one hand studies double feedback electric engine is incorporated into the power networks control strategy to improve stability of grid connection, another
Aspect is exactly to study the structure of double-fed generator ontology to improve the power density of generator.With rare earth permanent-magnetic material performance
It is continuously improved, permanent magnet is used for the design of motor and is continuously emerged to improve the research of the performance of motor, magneto is used at present
Generating system power transformer complexity is still had in wind-power electricity generation, controls the disadvantages of at high cost.
Summary of the invention
For above-mentioned deficiency present in existing wind driven generator technology, the present invention provides a kind of with birotor permanent magnetic knot
Structure, using back-to-back converter, suitable for directly driving or the half straight birotor permanent magnetic doubly-fed wind turbine for driving occasion, and it is traditional
Permanent magnet synchronous wind generator is compared, and identical capacity lower volume weight is smaller, cost is lower, and can more utilize the wind under low wind speed
Energy.Compared with traditional double-fed generator, excitation capacity will reduce.
To achieve the above object, the present invention provides a kind of birotor permanent magnetic doubly-fed wind turbine, comprising: casing, casing
Equipped with first side and second side；First side is equipped with the first fixation hole, and second side is equipped with the second fixation hole；First is fixed
It is arranged with first bearing in the hole wall in hole, is arranged with stator axis in the hole wall of the second fixation hole and holds；
Casing internal is equipped with coiling internal rotor, is enclosed with permanent magnet outer rotor, permanent magnet outer rotor outside coiling internal rotor
Outside is enclosed with stator；
Stator is installed in the inner wall of casing；
Permanent magnet outer rotor is equipped with the first cylindrical body and the second cylindrical body；
First periphery of the first cylindrical body is connect with the second periphery of the second cylindrical body；First cylindrical body
The cylindricality frame of frame is equipped with permanent magnet；
First the second periphery of cylindrical body is equipped with 3rd bearing；The position of first the second periphery of cylindrical body
It is arranged close to second side；
First periphery of the second cylindrical body extends to the first side of casing；Second cylindrical body is equipped with and the
The second cylindrical body auxiliary section that one bearing matches, first bearing are set in the outside of the second cylindrical body auxiliary section,
The inner sleeve of second cylindrical body auxiliary section is equipped with 3rd bearing, and the second cylindrical body auxiliary section is in first bearing and third
It is freely rotated between bearing；
Coiling internal rotor is equipped with three-phase rotor windings, and coiling internal rotor is provided centrally with shaft；Shaft first end and the
Three bearing inner walls interference fit, shaft first end are freely rotated with 3rd bearing；Shaft second end sequentially passes through in 3rd bearing
Hole and stator brearing bore, extend to outside second side, and shaft second end is freely rotated in second side side.
Preferably, the center line of stator, the first cylindrical body center line and the second cylindrical body frame of permanent magnet outer rotor
The center line of frame center line and coiling internal rotor is on same straight line.
Preferably, shaft second end is equipped with interior runner axle sleeve, and interior runner shaft, which is put on, is arranged with wind wheel.
Preferably, three-phase rotor windings are connected with brush and slip ring in turn, and three-phase rotor windings pass sequentially through brush and cunning
Ring connects rotor bilateral pwm converter, provides three phase excitation power supply by rotor bilateral pwm converter；
Stator includes: stator core and three-phase stator winding；The three-phase stator winding and three-phase rotor windings are three
Symmetrical exchange winding.
Preferably, air-gap is equipped between permanent magnet and stator, the magnetic linkage and be passed through ac excitation power supply that permanent magnet generates
The magnetic linkage linkage that is generated in air-gap of three-phase rotor windings, while the magnetic field linkage generated with three-phase stator winding realizes
Composite excitation.
Preferably, the number of poles of the permanent magnet outer rotor is identical with the number of poles of coiling internal rotor with stator；
The permanent magnet outer rotor is made of permeability magnetic material, the position of permanent magnet and the position pair of three-phase rotor windings
It answers, the magnetizing direction of permanent magnet is radial magnetizing.
Preferably, the cylinder diameter of the first cylindrical body is greater than the cylinder diameter of the second cylindrical body.
A kind of electricity generation system based on birotor permanent magnetic doubly-fed wind turbine, comprising: stator main inductance Ls, stator resistance
Rs, stator winding counter electromotive force j ωsψs, mutual inductor Lm, coiling internal rotor resistance Rr, coiling internal rotor inductance Lr, coiling internal rotor
Counter electromotive force j ωs1ψr；
The wind energy that wind captures is passed to coiling internal rotor by wind wheel, and coiling internal rotor three-phase windings are in rotor-side excitation voltage
urUnder the drive of wind wheel, is rotated with certain speed, three-phase voltage u is induced on stators, permanent magnet generate magnetic linkage and
It is passed through the magnetic linkage linkage that the three-phase rotor windings of ac excitation power supply generate in air-gap, while being generated with three-phase stator winding
Magnetic field linkage, realize composite excitation will generate biggish magnetizing current when stator main inductance Ls is bigger than stator resistance Rs
im；The permanent magnet installed on permanent magnet outer rotor generates electromotive force uP, reduce the magnetizing current i that operation needsm；
Stator incudes three-phase voltage us, rotor-side excitation voltage ur, stator-induced electromagnetic stream is, rotor-side exciting current irPoint
It Wei not stator, coiling internal rotor voltage and current vector；ψs、ψrRespectively stator, coiling internal rotor flux linkage vector, vector form F
=Fd+jFq；
ωsAnd ωs1Respectively synchronized angular frequency and motor slip angular frequency；Stator resistance Rs, stator main inductance Ls,
Coiling internal rotor resistance Rr, coiling internal rotor inductance Lr, mutual inductor Lm, respectively reduction to stator and interior wound rotor winding electricity
Resistance and inductance and mutual inductance；
Stator winding counter electromotive force j ωsψsCoiling internal rotor counter electromotive force j ωs1ψrStator and interior wound rotor respectively around
The counter electromotive force that group generates.
As can be seen from the above technical solutions, the invention has the following advantages that
Permanent magnet outer rotor pastes magnet structure using permeability magnetic material surfaces externally and internally, and surfaces externally and internally permanent magnetism body position is mutual
It is corresponding.The air gap flux density of motor gas-gap can be improved in the magnet structure.
The torque density of motor is directly proportional to motor gas-gap surface area, air gap flux density value, and birotor permanent magnetic of the invention is double
Wind-driven generator is presented, increases air gap surface product, and increased outer rotor magnet is all increased using special magnet structure
Air gap flux density, to improve the torque density of motor.
The inner and outer rotors structure that birotor permanent magnetic doubly-fed wind turbine of the invention uses, not only makes inner and outer Rotator gas
Gap flux density improves, inner and outer rotors is made to grip the reduction of portion's flux density, to improve the operational efficiency and torque density of motor, and makes inside and outside
Rotor airgap flux density is in Sine distribution, and winding potential can be guaranteed in Sine distribution.
Birotor permanent magnetic doubly-fed wind turbine uses magnetic field of permanent magnet excitation, can neatly adjust air-gap field, drops
Low rotor-side frequency converter excitation capacity, improves the power factor and efficiency of motor.The presence of permanent magnetic field, improves motor
Various malfunctions under service ability, the stabilization of power grids under malfunction is provided strong support.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in description will be made below simple
Ground introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill
For personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is birotor permanent magnetic doubly-fed wind turbine overall schematic；
Fig. 2 is birotor permanent magnetic doubly-fed wind turbine axial section structural schematic diagram；
Fig. 3 is the electricity generation system overall schematic using birotor permanent magnetic doubly-fed wind turbine.
Specific embodiment
It in order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below will be with specific
Examples and drawings, the technical solution protected to the present invention are clearly and completely described, it is clear that implementation disclosed below
Example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiment in this patent, the common skill in this field
Art personnel all other embodiment obtained without making creative work belongs to the model of this patent protection
It encloses.
The present embodiment provides a kind of birotor permanent magnetic doubly-fed wind turbines, as depicted in figs. 1 and 2, comprising: casing 12,
Casing 12 is equipped with first side 21 and second side 22；First side 21 is equipped with the first fixation hole, and it is solid that second side is equipped with second
Determine hole；It is arranged with first bearing 10 in the hole wall of first fixation hole, is arranged with stator axis in the hole wall of the second fixation hole and holds 8；
It is equipped with coiling internal rotor 5 inside casing 12, is enclosed with permanent magnet outer rotor 3 outside coiling internal rotor 5, outside permanent magnet
Stator 1 is enclosed with outside rotor 3；Stator 1 is installed in the inner wall of casing 12；Stator 1 is installed in the mode of 12 inner wall of casing here
Without limitation, it can be connected by screw bolts or rivet interlacement etc..
Permanent magnet outer rotor 3 is equipped with the first cylindrical body 23 and the second cylindrical body 24；Preferably, the first cylindrical body
The cylinder diameter of frame 23 is greater than the cylinder diameter of the second cylindrical body 24.Permanent magnet outer rotor 3 can be reduced in this way
Area, save material, can also play by exchange and permanent magnetism mixing excitation doubly-fed wind turbine on increase by one and coiling
The permanent magnet outer rotor of rotor arranged concentric, the permanent magnet 4 of the first cylindrical body 23 of the permanent magnet outer rotor can be stator
Air gap provides magnet excitation, to improve the power factor and power density of generator operation.The cylinder of first cylindrical body 23
Body diameter is greater than the cylinder diameter of the second cylindrical body 24, can play magnet excitation focusing on the first cylindrical body
23, to improve the power factor and power density of generator operation.
First cylindrical body, 23 second periphery is equipped with 3rd bearing 25；First cylindrical body, 23 second periphery
Be located proximate to second side 22 setting；
First periphery of the second cylindrical body 24 extends to the first side 21 of casing 12；Second cylindrical body 24
Equipped with the second cylindrical body auxiliary section 26 matched with first bearing 10, first bearing 10 is set in the second cylindrical body
The inner sleeve of the outside of auxiliary section 26, the second cylindrical body auxiliary section 26 is equipped with 3rd bearing 27, and the second cylindrical body is matched
Conjunction portion 26 is freely rotated between first bearing 10 and 3rd bearing 27；
Coiling internal rotor 5 is equipped with three-phase rotor windings 6, and coiling internal rotor is provided centrally with shaft 7；7 first end of shaft
It is interference fitted with 27 inner wall of 3rd bearing, 7 first end of shaft is freely rotated with 3rd bearing 27；7 second end of shaft sequentially passes through
8 inner hole of 25 inner hole of 3rd bearing and stator bearing, extends to outside second side 22, and 7 second end of shaft is in second side 22 1
Side is freely rotated.
Wherein, the center line of stator 1,23 center line of the first cylindrical body of permanent magnet outer rotor 3 and the second cylindrical body
The center line of 24 center line of frame and coiling internal rotor 5 is on same straight line.Permanent magnet outer rotor 3 is mounted on 1 He of stator
Between coiling internal rotor 5, permanent magnet outer rotor 3 can be rotated freely around bearing.Permanent magnet 4 is fixed on permanent magnet outer rotor 3
Together.It can only be with the equidirectional rotation of coiling internal rotor 5.
In the present embodiment, 7 second end of shaft is equipped with interior runner axle sleeve, and interior runner shaft, which is put on, is arranged with wind wheel 14.
In the present embodiment, three-phase rotor windings 6 are connected with brush 9 and slip ring 11 in turn, and three-phase rotor windings 6 pass sequentially through
Brush 9 and slip ring 11 connect rotor bilateral pwm converter, provide three phase excitation power supply by rotor bilateral pwm converter；Stator 1
It include: stator core and three-phase stator winding 5；The three-phase stator winding 5 is that three-phase symmetrical exchanges with three-phase rotor windings 6
Winding.
In the present embodiment, air-gap is equipped between permanent magnet 4 and stator 1, the magnetic linkage that permanent magnet 4 generates is encouraged with being passed through to exchange
The magnetic linkage linkage that the three-phase rotor windings 6 in magnetoelectricity source generate in air-gap, while the magnetic field circle generated with three-phase stator winding 5
Chain realizes composite excitation.
The number of poles of the permanent magnet outer rotor is identical with the number of poles of coiling internal rotor with stator；The permanent magnet outer rotor
3 are made of permeability magnetic material, and the position of permanent magnet 4 is corresponding with the position of three-phase rotor windings 6, and permanent magnet 4 magnetizes as radial direction
It magnetizes.The air gap flux density of motor double air gaps can be improved in the magnet structure.
There is interior air gap between electric machine winding internal rotor and stator, there is outer air gap between permanent magnet outer rotor 3 and stator.It is interior
The inside and outside air gap of motor is respectively formed between outer rotor and stator, the formation of double air gaps increases the effective air gap area of motor.
Stator core and rotor core are made of silicon steel laminations or other permeability magnetic materials, identical as ordinary motor manufacturing process.
In the present embodiment, pwm converter is reduced by the change of birotor permanent magnetic doubly-fed wind turbine body construction
Capacity and impact stress when operation, both facilitated wind generator system and mitigated weight, while having also contributed to saving wind-force hair
Electricity operation and maintenance cost.
Mechanical shock when birotor permanent magnetic doubly-fed wind turbine can reduce blower starting and variable-speed operation, while reducing and turning
Sub- side converter excitation capacity.And big, megawatt level capacity wind is impacted on startup for depositing in existing wind driven generator technology
The big deficiency of machine rotor side pwm converter capacity, the present invention use back-to-back converter, are suitable for straight drive or partly directly drive occasion
Composite excitation doubly-fed wind turbine, compared with traditional doubly-fed wind turbine, identical capacity lower volume and weight it is smaller,
Maintenance cost is lower, and excitation capacity is small, and can more utilize the wind energy under low wind speed.
Permanent magnet outer rotor does not connect any load.The number of poles of permanent magnet outer rotor will be with the number of poles of stator and coiling internal rotor
It is identical；Coiling internal rotor is installed on inside permanent magnet outer rotor, there is air-gap, coiling internal rotor packet between permanent magnet outer rotor
Include internal rotor iron core and winding；Internal rotor is fixedly connected with shaft.Stator winding is that three-phase symmetrical exchanges with coiling internal rotor
Winding.
First cylindrical body 23 of permanent magnet outer rotor and the second cylindrical body 24 are made of permeability magnetic material, and first
23 surfaces externally and internally of cylindrical body pastes magnet structure, and surfaces externally and internally permanent magnetism body position corresponds to each other.The magnet structure can be with
Improve the air gap flux density of motor double air gaps.
The torque density and motor gas-gap surface area of motor, air gap flux density value are directly proportional, and exchange and permanent magnetism of the invention are mixed
Close excitation doubly-fed wind turbine, increase air gap surface product, and increased permanent magnet outer rotor magnet all use it is special
Magnet structure and increase air gap flux density, to improve the torque density of motor.
The inner and outer rotors structure that the exchange of the present embodiment and permanent magnetism mixing excitation doubly-fed wind turbine use, not only makes
Inner and outer Rotator air gap flux density improve, make inner and outer rotors grip portion's flux density reduction, thus improve motor operational efficiency and torque it is close
Degree, and make inner and outer rotors air gap flux density in Sine distribution, winding potential can be guaranteed in Sine distribution.
The present invention also provides a kind of electricity generation systems based on birotor permanent magnetic doubly-fed wind turbine, as shown in figure 3, packet
It includes: stator main inductance Ls, stator resistance Rs, stator winding counter electromotive force j ωsψs, mutual inductor Lm, coiling internal rotor resistance Rr, around
Line internal rotor inductance Lr, coiling internal rotor counter electromotive force j ωs1ψr；
The wind energy that wind captures is passed to coiling internal rotor by wind wheel, and coiling internal rotor three-phase windings are in rotor-side excitation voltage
urUnder the drive of wind wheel, is rotated with certain speed, three-phase voltage u is induced on stators, permanent magnet generate magnetic linkage and
It is passed through the magnetic linkage linkage that the three-phase rotor windings of ac excitation power supply generate in air-gap, while being generated with three-phase stator winding
Magnetic field linkage, realize composite excitation will generate biggish magnetizing current when stator main inductance Ls is bigger than stator resistance Rs
im；The permanent magnet installed on permanent magnet outer rotor generates electromotive force uP, reduce the magnetizing current i that operation needsm；
Stator incudes three-phase voltage us, rotor-side excitation voltage ur, stator-induced electromagnetic stream is, rotor-side exciting current irPoint
It Wei not stator, coiling internal rotor voltage and current vector；ψs、ψrRespectively stator, coiling internal rotor flux linkage vector, vector form F
=Fd+jFq；
ωsAnd ωs1Respectively synchronized angular frequency and motor slip angular frequency；Stator resistance Rs, stator main inductance Ls,
Coiling internal rotor resistance Rr, coiling internal rotor inductance Lr, mutual inductor Lm, respectively reduction to stator and interior wound rotor winding electricity
Resistance and inductance and mutual inductance；
Stator winding counter electromotive force j ωsψsCoiling internal rotor counter electromotive force j ωs1ψrStator and interior wound rotor respectively around
The counter electromotive force that group generates.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment refer to mutually.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of birotor permanent magnetic doubly-fed wind turbine characterized by comprising casing (12), casing (12) are equipped with first
Side (21) and second side (22)；First side (21) is equipped with the first fixation hole, and second side is equipped with the second fixation hole；First
It is arranged in the hole wall of fixation hole first bearing (10), is arranged with stator axis in the hole wall of the second fixation hole and holds (8)；
Coiling internal rotor (5) are equipped with inside casing (12), are enclosed with permanent magnet outer rotor (3), permanent magnetism outside coiling internal rotor (5)
Stator (1) is enclosed with outside external rotor (3)；
Stator (1) is installed in the inner wall of casing (12)；
Permanent magnet outer rotor (3) is equipped with the first cylindrical body (23) and the second cylindrical body (24)；
First periphery of the first cylindrical body (23) is connect with the second periphery of the second cylindrical body (24)；First circle
The cylindricality frame of cylinder frame (23) is equipped with permanent magnet (4)；
(23) second periphery of first cylindrical body is equipped with 3rd bearing (25)；(23) second circumference of first cylindrical body
Face is located proximate to second side (22) setting；
First periphery of the second cylindrical body (24) extends to the first side (21) of casing (12)；Second cylindrical body
(24) it is equipped with the second cylindrical body auxiliary section (26) matched with first bearing (10), first bearing (10) is set in second
The inner sleeve of the outside of cylindrical body auxiliary section (26), the second cylindrical body auxiliary section (26) is equipped with 3rd bearing (27),
Second cylindrical body auxiliary section (26) is freely rotated between first bearing (10) and 3rd bearing (27)；
Coiling internal rotor (5) is equipped with three-phase rotor windings (6), and coiling internal rotor is provided centrally with shaft (7)；Shaft (7)
One end and 3rd bearing (27) inner wall are interference fitted, and shaft (7) first end is freely rotated with 3rd bearing (27)；Shaft (7)
Two ends sequentially pass through 3rd bearing (25) inner hole and stator bearing (8) inner hole, extend to second side (22) outside, shaft (7)
Second end is freely rotated in second side (22) side.
2. birotor permanent magnetic doubly-fed wind turbine according to claim 1, which is characterized in that
The center line of stator (1), the first cylindrical body (23) center line of permanent magnet outer rotor (3) and the second cylindrical body
(24) center line of center line and coiling internal rotor (5) is on same straight line.
3. birotor permanent magnetic doubly-fed wind turbine according to claim 1 or 2, which is characterized in that
Shaft (7) second end is equipped with interior runner axle sleeve, and interior runner shaft, which is put on, is arranged with wind wheel (14).
4. birotor permanent magnetic doubly-fed wind turbine according to claim 1 or 2, which is characterized in that
Three-phase rotor windings (6) are connected with brush (9) and slip ring (11) in turn, and three-phase rotor windings (6) pass sequentially through brush (9)
Rotor bilateral pwm converter is connected with slip ring (11), provides three phase excitation power supply by rotor bilateral pwm converter；
Stator (1) includes: stator core and three-phase stator winding (5)；The three-phase stator winding (5) and three-phase rotor windings
It (6) is three-phase symmetrical exchange winding.
5. birotor permanent magnetic doubly-fed wind turbine according to claim 4, which is characterized in that
Air-gap is equipped between permanent magnet (4) and stator (1), the magnetic linkage and be passed through ac excitation power supply that permanent magnet (4) generates
The magnetic linkage linkage that three-phase rotor windings (6) generate in air-gap, while the magnetic field linkage generated with three-phase stator winding (5),
Realize composite excitation.
6. birotor permanent magnetic doubly-fed wind turbine according to claim 1 or 2, which is characterized in that
The number of poles of the permanent magnet outer rotor is identical with the number of poles of coiling internal rotor with stator；
The permanent magnet outer rotor (3) is made of permeability magnetic material, the position of permanent magnet (4) and the position of three-phase rotor windings (6)
Correspondence is set, the magnetizing direction of permanent magnet (4) is radial magnetizing.
7. birotor permanent magnetic doubly-fed wind turbine according to claim 1 or 2, which is characterized in that
The cylinder diameter of first cylindrical body (23) is greater than the cylinder diameter of the second cylindrical body (24).
8. a kind of electricity generation system based on the described in any item birotor permanent magnetic doubly-fed wind turbines of claim 1-7, special
Sign is, comprising: stator main inductance Ls, stator resistance Rs, stator winding counter electromotive force j ωsψs, mutual inductor Lm, coiling internal rotor
Resistance Rr, coiling internal rotor inductance Lr, coiling internal rotor counter electromotive force j ωs1ψr；
The wind energy that wind captures is passed to coiling internal rotor by wind wheel, and coiling internal rotor three-phase windings are in rotor-side excitation voltage urWith
Under the drive of wind wheel, is rotated with certain speed, three-phase voltage u is induced on stators, magnetic linkage and be passed through that permanent magnet generates
The magnetic linkage linkage that the three-phase rotor windings of ac excitation power supply generate in air-gap, while the magnetic generated with three-phase stator winding
Field linkage realizes that composite excitation will generate biggish magnetizing current i when stator main inductance Ls is bigger than stator resistance Rsm；Forever
The permanent magnet installed on magnet outer rotor generates electromotive force uP, reduce the magnetizing current i that operation needsm；
Stator incudes three-phase voltage us, rotor-side excitation voltage ur, stator-induced electromagnetic stream is, rotor-side exciting current irIt is respectively fixed
Son, coiling internal rotor voltage and current vector；ψs、ψrRespectively stator, coiling internal rotor flux linkage vector, vector form F=Fd+
jFq；
ωsAnd ωs1Respectively synchronized angular frequency and motor slip angular frequency；Stator resistance RsAnd coiling internal rotor resistance Rr、
Stator main inductance LsAnd coiling internal rotor inductance Lr, mutual inductor Lm, respectively reduction to stator and coiling internal rotor resistance, inductance
And mutual inductance；
Stator winding counter electromotive force j ωsψs, coiling internal rotor counter electromotive force j ωs1ψrIt is that stator and coiling internal rotor generate respectively
Counter electromotive force.
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| CN110601479B (en) * | 2019-09-20 | 2021-10-29 | 齐鲁工业大学 | Double-rotor induction wind driven generator and working method thereof |
| CN110492710B (en) * | 2019-09-20 | 2021-02-26 | 齐鲁工业大学 | Double-rotor generator and control method thereof |
| CN112271896B (en) * | 2020-04-28 | 2023-05-05 | 广东佛华裕科技有限公司 | Cross magnetic flux rolling brush stacked rotor motor |
| CN113691093B (en) * | 2021-07-30 | 2022-12-09 | 齐鲁工业大学 | Outer rotor permanent magnet induction motor and working method |
| CN114123697B (en) * | 2021-11-04 | 2022-08-26 | 新亚东方电能科技有限公司 | New forms of energy generator rotor dual drive device |
| CN114810462B (en) * | 2022-04-27 | 2024-01-16 | 哈尔滨工程大学 | Offshore comprehensive application platform comprehensively utilizing wind energy, salt energy and tidal current energy |
| KR102518672B1 (en) * | 2022-12-09 | 2023-04-05 | 박명수 | generator with multiple outputs |
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