CN105811738B - A kind of full superconduction primary field excitation linear generator of direct-drive type wave-activated power generation - Google Patents

A kind of full superconduction primary field excitation linear generator of direct-drive type wave-activated power generation Download PDF

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Publication number
CN105811738B
CN105811738B CN201610238214.1A CN201610238214A CN105811738B CN 105811738 B CN105811738 B CN 105811738B CN 201610238214 A CN201610238214 A CN 201610238214A CN 105811738 B CN105811738 B CN 105811738B
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primary
iron core
stator
differential protection
exciting windings
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CN105811738A (en
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黄磊
杨健
胡敏强
陈珉烁
酒辰霄
赵东东
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Southeast University
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Southeast University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Abstract

The invention discloses a kind of direct-drive type wave-activated power generation with full superconduction primary field excitation linear generator, it is made up of primary stator and secondary mover, primary stator is made up of multigroup stator unit arranged in a straight line, each stator unit is included by the opening that two primary iron cores are formed towards the U-shaped iron core of secondary mover, the primary armature winding being arranged in the primary iron core, the primary Exciting Windings for Transverse Differential Protection that is arranged in the U-shaped iron core, secondary mover is the iron core of the tooth slot structure without winding, and corresponding tooth slot structure is provided with the primary iron core.In the present invention, arcuate structure Exciting Windings for Transverse Differential Protection is set in outside primary iron core, and cooling system does not move, and reduces complexity.More toothings are secondary, can increase magnetic field interconversion rate and terminal voltage, make up the shortcomings that low-speed voltage is low；Unequal distance tooth, reduce end tooth away from increase sends electric voltage frequency and amplitude when moving to end.

Description

A kind of full superconduction primary field excitation linear generator of direct-drive type wave-activated power generation
Technical field
The invention belongs to linear electric generator field, and it is straight to be related to a kind of primary excitation applied to direct-drive wave power generation system Line generator.
Background technology
Ocean energy is distributed widely in earth surface, wave energy be it is a kind of it is widely distributed, energy density is big, grade highest, most It is easy to the marine energy directly utilized.Wave-activated power generation does not have any noise, is revealed in the absence of greasy dirt dangerous.Wave-activated power generation will open One new pure energy epoch.Wave-energy power generation technology may be directly applied to oceanographic observation instrument electric power system, military affairs and the people With test buoy electric power system, Dokdo electric power system, job platform electric power system and large-scale grid connection type power generation with marine energy system System.Directly drive reciprocating wave-power device using energy collecting device and linear electric generator directly in conjunction with, change it is traditional general Linear motion is converted to rotary motion by other mechanical devices, drives the generation mode of rotary generator, to the energy that moves along a straight line Source is directly collected, and eliminates the power transfer link of centre, and system generating efficiency can improve more than 20%.Meanwhile drop The low complexity of system, reduces volume, improves stability.In addition, Zhi Qu wave electric power systems mechanism is simple, cost It is low, launch region it is wide, be suitable for scale application.Therefore, reciprocating type wave energy generating is directly driven to have broad prospects.However, The characteristics of due to wave-activated power generation low-speed direct driving, primary energy conversion is with high thrust, low velocity feature, and motor gas-gap is long-range In electric rotating machine so that be respectively provided with bulky, power using the linear electric generator of traditional permanent-magnet structure and electrical excitation structure The shortcomings that density is lower.
The content of the invention
Technical problem：The present invention, which provides one kind, has high power density and efficiency, and cooling system is simplified using primary excitation Unite structure, the full superconduction primary excitation of the direct-drive type wave-activated power generation of the operation segmented secondary design optimization motor output quality of power supply Linear electric generator.
Technical scheme：The full superconduction primary field excitation linear generator of the direct-drive type wave-activated power generation of the present invention, by primary stator Formed with secondary mover, the primary stator is made up of multigroup stator unit arranged in a straight line, and each stator unit includes By U-shaped iron core of the opening that two primary iron cores are formed towards secondary mover, the primary armature that is arranged in the primary iron core Winding, the primary Exciting Windings for Transverse Differential Protection being arranged in the U-shaped iron core, the secondary mover are the iron of the tooth slot structure without winding Core, corresponding tooth slot structure is provided with the primary iron core.The facewidth of the secondary mover tooth slot structure is identical, secondary Mover is divided into that the first secondary section that a tooth pitch is 2 τ, second of level segment that two tooth pitches are 1.25 τ and two tooth pitches are τ Three secondary sections, first secondary section are located in the middle part of secondary mover, and two third time level segments are located at secondary mover both ends respectively, the Secondary level segment (14) is between the first secondary section and third time level segment.The primary Exciting Windings for Transverse Differential Protection is divided into two parts, a part The outside of two primary adjacent parts of iron core is arranged on, another part is arranged on the Exciting Windings for Transverse Differential Protection branch along arrangement on the outside of U-shaped iron core On frame, the primary Exciting Windings for Transverse Differential Protection and primary armature winding are superconduction winding.
Further, the present invention in, the superconduction winding by pie structure MgB2Superconducting line material forms, the primary Armature winding cooling Dewar and Exciting Windings for Transverse Differential Protection cooling Dewar are provided with stator.
Further, in the present invention, in the primary stator, the spacing of two neighboring stator unit for (5N+1+2/3) τ- D, wherein, D is length of the stator unit on direction arranged in a straight line, and N is odd number, two primary iron cores in same stator unit Spacing is (M ± 1/2) τ-d, and wherein d is length of the primary iron core on direction arranged in a straight line, and M is integer.
Further, in the present invention, in primary stator, the spacing of two neighboring stator unit is (6+2/3) τ-D, secondary Mover is equal with the facewidth of primary stator, and the teeth groove ratio of first secondary section, the i.e. ratio of the facewidth and groove width are 1: 3, second The teeth groove ratio of secondary section is 1: 1.5, and the teeth groove ratio of third time level segment is 1: 1.
The present invention is mainly made up of primary and secondary, and electric motor primary is by casing, primary iron core, armature winding, Exciting Windings for Transverse Differential Protection With cooling Dewar composition, the secondary mainly conducting magnet core including tooth slot structure and groove filling.Wherein, primary be fixed on casing it On, secondary is directly connected for motion parts with Wave energy collecting device (floating drum).Superconductive armature winding and superconduction Exciting Windings for Transverse Differential Protection Fixed primary is respectively positioned on, simplifies superconduction cooling body.Secondary is the iron core of tooth slot structure, without any winding, structure letter It is single.
In an aspect of the invention, motor is columnar structured, and outer barrel is electric motor primary (stator), and inner cylinder is motor secondary (mover).Exciting Windings for Transverse Differential Protection and armature winding use MgB2Superconducting wire, insulated to realize between line, MgB2Using non-outside superconducting wire Conductive material (refractory glass fibre) carries out jacket.Exciting Windings for Transverse Differential Protection support is titanium alloy or aluminum alloy materials.Mover is tooth The magnetic conductive metal body or alloy magnetic conductor of slot structure, non-magnet material is filled between groove.
In the preferred scheme of the present invention, Exciting Windings for Transverse Differential Protection uses telescopic cooling Dewar structure, is installed on primary iron core and machine Alternate to use spacing container or overall container between shell, cooling gas inlet is located at upper end, and outlet is located at lower end.Exciting Windings for Transverse Differential Protection Using cambered design, it is supported using non-magnetic titanium alloy support.
In preferred scheme, armature winding is installed in primary groove, primary armature winding is wrapped in using bushing type cooling Dewar In annular tube shaped Dewar pipe, it is connected between pipe by connecting tube, cooling gas inlet is located at the top Dewar pipe side, and outlet is located at Bottom Dewar pipe opposite side.
In preferred scheme, refrigerant can use liquid hydrogen.Primary iron core and the ferrocobalt material that secondary iron core is high saturation point. Secondary tooth pitch uses the variable pitch structure gradually decreased from centre to end with secondary location.
In the present invention, arcuate structure Exciting Windings for Transverse Differential Protection is set in outside primary iron core, and cooling system does not move, and reduces complexity Degree.Superconduction excitation can improve air gap flux density, increase power density, and can realize flux control.Superconductive armature can eliminate armature Loss, increase generating efficiency, and groove width can be reduced, increase primary and secondary useful flux area.MgB2Superconductor and iron cobalt close The primary and secondary core structure of gold, can make full use of MgB2Field strength and the high saturation point of ferrocobalt.More toothings are secondary, can increase Magnetic field interconversion rate and terminal voltage, make up the shortcomings that low-speed voltage is low；Unequal distance tooth, reduce end tooth away from increase moves to end When send electric voltage frequency and amplitude.Modular construction, complete mechanical structure and cooling unit are independent, reduce cooling difficulty.
Beneficial effect：The present invention compared with prior art, has advantages below：
The present invention is primary excitation full super conduction linear electric generator, and Exciting Windings for Transverse Differential Protection and armature winding are respectively positioned on the first of stationary part Level, cooling Dewar and refrigeration machine and associated adapter with labyrinth need not move, and its complexity has obtained dropping significantly It is low.MgB is selected2Superconductor can be freezed with liquid hydrogen, reduce the requirement of refrigeration machine, while avoided a variety of superconductors and mixed The complexity of conjunction, beneficial to realization.Regular copper lines winding instead of using superconduction Exciting Windings for Transverse Differential Protection so that air gap flux density is carried Height, increase power density, meanwhile, flux control can be realized by changing the electric current of Exciting Windings for Transverse Differential Protection, reduce wave and change greatly shape Into the voltage power supply pressure of external circuit switching device, increase power regulating range.Armature winding uses superconducting wire, can eliminate Armature loss, increase generating efficiency, and because superconduction winding current-carrying capacity exceeds well over logical winding, the width of groove can be reduced, increase Useful flux area between primary and secondary, simultaneously because using the superconduction winding of the less number of turn, the electricity of armature winding can be reduced It is anti-, improve power factor.The primary and secondary core structure of ferrocobalt unshakable in one's determination is employed, due to the high saturation point of ferrocobalt, MgB can be made full use of2Superconductor operating fields are strong and the advantages of ferrocobalt saturation Point matching.Primary uses more toothings, Magnetic field interconversion rate can be increased, so as to increase effective voltage, make up the shortcomings that output voltage is not high when wave directly drives low speed；Using not Equidistant gear mutation, secondary end tooth pitch from less than secondary center tooth away from, linear electric motors under wave driving, in end movement velocity Reduce, therefore, by reduce end tooth away from can increase move to end when rate of change of magnetic so as to increase motor send voltage frequency Rate and amplitude.Using 1: 3 (the first secondary section), the ratio of 1: 1.5 (second of level segment) and 1: 1 (third time level segment), Ke Yishi Existing motor output voltage three-phase voltage differs 120 ° of phase angles.Employ modular construction completely, intermodule complete mechanical structure and Cooling unit is independent.It can independently cool down, reduce cooling difficulty, and be advantageous to install and transport.
Brief description of the drawings
Fig. 1 is the profile of primary excitation full super conduction linear electric generator.
Fig. 2 is the individual module schematic diagram of primary excitation full super conduction linear electric generator.
Fig. 3 is the primary armature cooling Dewar figure of primary excitation full super conduction linear electric generator.
Fig. 4 is the secondary structure figure of primary excitation full super conduction linear electric generator.
In figure：1. primary iron core, 2. level iron cores, 3. armature winding cooling Dewar, 4. Exciting Windings for Transverse Differential Protection cooling Dewar, at the beginning of 5. Level Exciting Windings for Transverse Differential Protection, 6. primary armature winding, 7. Exciting Windings for Transverse Differential Protection supports, 8. Exciting Windings for Transverse Differential Protection Dewar cold air input pipes, 9. Exciting Windings for Transverse Differential Protection Dewar cold air efferent duct, 10. armature winding Dewar cold air input ports, 11. armature winding Dewar cold air delivery outlets, 12. armatures around Cold air transfer tube between group Dewar, 13. first secondary sections, 14. second of level segment, 15. third time level segments.
Embodiment
With reference to embodiment and Figure of description, the present invention is further illustrated.
Illustrate present embodiment with reference to Fig. 1-Fig. 4.Present embodiment includes primary and secondary.Primary is by primary iron core 1st, primary Exciting Windings for Transverse Differential Protection 5, primary armature winding 6, Exciting Windings for Transverse Differential Protection cooling Dewar 4, armature winding cooling Dewar 5 and Exciting Windings for Transverse Differential Protection branch Frame 7 forms.Secondary using different teeth groove than secondary section 13,14 and 15 form, to realize ring type filling in collateral motion secondary slot Oxygen tree fat.Primary and secondary iron core uses ferrocobalt to improve the saturation point of electric machine iron core.Exciting Windings for Transverse Differential Protection using excitation around Pack support 7 supports, the Exciting Windings for Transverse Differential Protection 5 in the Exciting Windings for Transverse Differential Protection and support of bracket outer, using pie winding construction, electric current in winding For DC current in opposite direction, to form arc closed magnetic circuit.Primary under same Exciting Windings for Transverse Differential Protection support is an independent primary Module (such as Fig. 2).Exciting Windings for Transverse Differential Protection Dewar 4 inputs refrigerant by Exciting Windings for Transverse Differential Protection Dewar cold air input port 8, is shut out by Exciting Windings for Transverse Differential Protection Watt cold air efferent duct 9 carries out cooling circulation.Armature winding is closed in armature armature winding cooling Dewar 3, passes through armature winding Dewar cold air input port 10, armature winding middle transition pipe 12, armature winding Dewar cold air delivery outlet 11 and armature winding cooling Dewar 3 realizes armature winding kind of refrigeration cycle.
The spacing of two neighboring stator unit is (5N+1+2/3) τ-D, wherein, D is stator unit in direction arranged in a straight line On length, N is odd number, it is preferred that this spacing is (6+2/3) τ-D, and the 1st module and the 4th primary module collectively constitute One phase winding, Neighboring primary intermodule Exciting Windings for Transverse Differential Protection is in opposite direction, i.e., the outer excitation armature supply direction of support and closes on around support Interior excitation armature supply direction is identical.The spacing of two primary iron cores 1 is (M ± 1/2) τ-d in same stator unit, and wherein d is Length of the primary iron core 1 on direction arranged in a straight line, M is integer.The same U-shaped core armature winding direction of primary is opposite.
In the preferred embodiments of the present invention, secondary using different secondary sections form, the facewidth of different sections is identical, its facewidth with The primary facewidth is equal.The teeth groove ratio of first secondary section 13, the i.e. ratio of the facewidth and groove width are 1: 3, the teeth groove of second of level segment 14 Than being 1: 1 for the teeth groove ratio of 1: 1.5, third time level segment 15.Electricity when moving to both ends is improved by the pole span change of side end tooth Pressure.It is 1: 1.6: 2 that three sections of voltage ratios under identical speed, which can now be obtained,.Each phase voltage phase difference is 120 °, realizes three-phase Symmetrically.The phenomenon that voltage drastically declines during both ends when can improve motor under the driving of actual wave, improves motor output performance.
Above implementation is applied to dual flat linear electric motors or unilateral flat linear electric motors.
Above-described embodiment is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill of the art For personnel, under the premise without departing from the principles of the invention, some improvement and equivalent substitution can also be made, these are to the present invention Claim be improved with the technical scheme after equivalent substitution, each fall within protection scope of the present invention.

Claims (3)

  1. A kind of 1. full superconduction primary field excitation linear generator of direct-drive type wave-activated power generation, it is characterised in that the linear electric generator by Primary stator and secondary mover composition, the primary stator are made up of multigroup stator unit arranged in a straight line, each stator Unit include by the opening that two primary iron cores (1) are formed towards secondary mover U-shaped iron core, be arranged on the primary iron core (1) primary armature winding (6) in, the primary Exciting Windings for Transverse Differential Protection (5) being arranged in the U-shaped iron core, the secondary mover is not The iron core of tooth slot structure containing winding, corresponding tooth slot structure is provided with the primary iron core (1)；
    The facewidth of the secondary mover tooth slot structure is identical, secondary mover be divided into a tooth pitch be 2 τ the first secondary section (13), The third time level segment (15) that second of the level segment (14) and two tooth pitches that two tooth pitches are 1.25 τ are τ, first secondary section (13) in the middle part of secondary mover, two third time level segments (15) are located at secondary mover both ends, second of level segment (14) position respectively Between the first secondary section (13) and third time level segment (15)；
    The primary Exciting Windings for Transverse Differential Protection (5) is divided into two parts, and a part is arranged on the outside of two adjacent parts of primary iron core (1), Another part is arranged on along the Exciting Windings for Transverse Differential Protection support (7) of arrangement on the outside of U-shaped iron core, the primary Exciting Windings for Transverse Differential Protection (5) and primary Armature winding (6) is superconduction winding；
    In the primary stator, the spacing of two neighboring stator unit is (5N+1+2/3) τ-D, wherein, D is stator unit straight Length in line orientation, N are odd number, and the spacing of two primary iron cores (1) is (M ± 1/2) τ-d in same stator unit, Wherein d is length of the primary iron core (1) on direction arranged in a straight line, and M is integer.
  2. 2. the full superconduction primary field excitation linear generator of direct-drive type wave-activated power generation according to claim 1, it is characterised in that The superconduction winding by pie structure MgB2Superconducting line material is formed, and armature winding cooling Du is provided with the primary stator Watt (3) and Exciting Windings for Transverse Differential Protection cooling Dewar (4).
  3. 3. direct-drive type wave-activated power generation according to claim 1 or 2 is existed with full superconduction primary field excitation linear generator, its feature In：In the primary stator, the spacing of two neighboring stator unit is (6+2/3) τ-D, secondary mover and primary the stator facewidth Equal, the teeth groove ratio of first secondary section (13), the i.e. ratio of the facewidth and groove width are 1: 3, the teeth groove of second of level segment (14) Than being 1: 1 for the teeth groove ratio of 1: 1.5, third time level segment (15).
CN201610238214.1A 2016-04-15 2016-04-15 A kind of full superconduction primary field excitation linear generator of direct-drive type wave-activated power generation Active CN105811738B (en)

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CN108400661A (en) * 2018-01-04 2018-08-14 苏州泰科贝尔直驱电机有限公司 A kind of annular direct driving motor
CN114362472B (en) * 2021-12-28 2023-04-25 中国人民解放军海军工程大学 Segmented spliced modular linear motor with intersegmental magnetic field compensation windings and splicing compensation method thereof

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