CN104578634B - A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator - Google Patents

A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator Download PDF

Info

Publication number
CN104578634B
CN104578634B CN201510057751.1A CN201510057751A CN104578634B CN 104578634 B CN104578634 B CN 104578634B CN 201510057751 A CN201510057751 A CN 201510057751A CN 104578634 B CN104578634 B CN 104578634B
Authority
CN
China
Prior art keywords
permanent magnet
stator
iron
core
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201510057751.1A
Other languages
Chinese (zh)
Other versions
CN104578634A (en
Inventor
朱军
刘慧君
朱艺锋
董玉杰
许孝卓
封海潮
付融冰
上官璇峰
汪旭东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan University of Technology
Original Assignee
Henan University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henan University of Technology filed Critical Henan University of Technology
Priority to CN201510057751.1A priority Critical patent/CN104578634B/en
Publication of CN104578634A publication Critical patent/CN104578634A/en
Application granted granted Critical
Publication of CN104578634B publication Critical patent/CN104578634B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/02Machines with one stator and two or more rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention discloses a kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator, including main shaft, rotor and stator, rotor contains two rotor disks for being symmetrically distributed in stator both sides, permanent magnet is equipped with towards stator on the inside of rotor disk, permanent magnet is shaped as cutting cheese or track type containing magnetic pole angle of different sizes with cambered surface, and adjacent permanent magnet along the circumferential direction is different with along the relative permanent magnet pole embrace of major axes orientation.Stator includes that stator coil winding and its support member, stator are rhombus or taper, iron-free cored structure using the centralized winding of the monolayer for not overlapping three-phase symmetrical, coil shape.Alternative traditional radial flux of the invention and the electromotor of cored structure, structure compared is simple, start light, generating efficiency and quality are high, noise is little, it is highly suitable for miniature direct-drive formula vertical axis wind power generation system, can be widely applied to city, pastoral area, island, fishing boat etc. and require that generating equipment movement motility is good, the higher occasion of power generating quality and efficiency.

Description

A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator
Technical field
The present invention relates to a kind of wind-driven generator, and in particular to a kind of stator iron-core-free double air gaps axial flux permanent magnet sensing Wind-driven generator.
Background technology
At present, small-sized wind power generator mainly has two kinds of forms of radial and axial magnetic flux, and axial magnetic flux electric generator structure is tight Gather, torque density is big, and axial length is short, is readily designed to multipolar dynamo;Additionally, stator design is into iron-free cored structure, can disappear Except the impact of cogging torque power in generator operation, reduce magnetic hysteresis and eddy-current loss, reduce electromotor incision wind speed, can run In the range of larger wind speed, it is suitable for the directly-driving wind power generation system without step-up gear, improves the reliability of wind generator system Property.
Small-sized wind power generator requires that motor incision wind speed is low, and rotary inertia is big, can realize breeze wind;Generating efficiency Height, is lost little;Power generating quality is high, and harmonic content is low;Lightweight, small volume, stock utilization are high, and compact conformation is simple.
The domestic at present iron-core-free axial flux permanent magnet electromotor to this high quality of power supply output is very much rare, such as China Axial-flux electric machine involved by patent of invention CN 103887909A, stator winding are cored, its structure and both at home and abroad related reason Consistent by research, as its starting torque is dynamic big, under mild wind, starting-generating is difficult, while the quality of power supply is also difficult to ensure that, uncomfortable For small-size wind power-generating field.
Content of the invention
It is an object of the invention to provide a kind of energy breeze start-up generates electricity, power generating quality is high, operation is light and handy stablizing, structure letter Single compact double air gaps axial flux permanent magnet wind-driven generator.
The technical solution used in the present invention is:The iron-core-free double air gaps axial flux permanent magnet wind-driven generator, including main shaft, Rotor and stator, the stator are fixedly connected the main shaft, and the rotor is symmetrically distributed in turning for the stator both sides containing two Sub-disk, is equipped with permanent magnet towards the stator on the inside of the rotor disk, and rotor disk is bearing on the main shaft, is characterized in, The permanent magnet be shaped as pole embrace do not wait while surface circular arc raised cut cheese or track type.
The following is the relevant technological means in some preferred versions.
Along the multiple permanent magnets of the rotor disk circumferential directions, uniform alternating places N poles and S polar bodys to the permanent magnet, And adjacent permanent magnet along the circumferential direction is different with along the relative permanent magnet pole embrace of major axes orientation, pole embrace is taken respectively 0.7 and 0.8.
Further, the permanent magnet first type surface is in plane, and in rotor disk face, another side on the other side is in circular arc Projection, the axially opposed arrangement of circular arc crowning.
Further, the permanent magnet total number is the even number more than 40, magnetizes vertically.
The stator includes stator coil winding and its support member being fixed together, and the stator winding coil is by propping up Support member is fixedly connected with the main shaft, and the stator winding coil is through epoxy resin injection molding.
The stator winding is shaped as rhombus or taper, iron-free using the centralized winding of the monolayer for not overlapping three-phase symmetrical Core and tooth slot structure.
Further, the coil electric angle of the stator coil winding can be with scope 220-260 ° of value, its coil number Sum is the positive integer that can be divided exactly by 3.
The main shaft is hollow spindle.The hollow spindle is provided with the aperture of the stator coil winding leading-out wire.
Compared with existing axial magnetic flux electromotor, patent of the present invention has the following advantages:
1st, the axial flux permanent magnet electromotor shown in the present invention, using have circular arc raised cut cheese or track type permanent magnet Shape, high with the electromotor output quality of power supply, harmonic content is low, and waveform sine is good, the high advantage of permanent magnet material utilization rate, Simultaneously using the rhombus or tape winding with permanent magnet form fit, can effectively reduce end turn length and copper loss, carry High generating efficiency;
2nd, the permanent magnet arrangement that the present invention is adopted, with leakage field is reduced, saves permanent magnet material, reduces torque ripple The characteristics of;
3rd, the present invention is shaped as rhombus or taper using the centralized winding of the monolayer for not overlapping three-phase symmetrical, iron-core-free and The stator component structure of teeth groove, the stator is almost without magnetic hysteresis and eddy-current loss, while avoid when wind-driven generator is started needing The impact of cogging torque power, anodontia slot structure is overcome to cause coil winding more freedom and flexibility, save the constraint of slot form, Motor rotation is more brisk, can accomplish that low speed even Ultra-Low Speed starts the target for generating electricity, improve wind energy utilization;
4th, multiple coils are coupled together and are fabricated to stator winding by the present invention in a certain order, through epoxy resin pair Its injection molding, will be close-coupled processing to stator winding and support member so as to be fixed on main shaft, it is ensured that motor is continually and steadily transported Be not in vibration and big noise during row.
Summary advantage, the main axial flux permanent magnet motor of the present invention can substitute traditional radial flux and cored The electromotor of structure, structure compared are simple, and startup is light, and generating efficiency and quality are high, and noise is little, is highly suitable for miniature direct-drive Formula vertical major wind generator system, can be widely applied to city, pastoral area, island, fishing boat etc. and requires generating equipment movement flexibly Good, the higher occasion of power generating quality and efficiency of property.
Description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is a kind of schematic diagram for cutting cheese permanent magnet;
Fig. 3 is sectional views of the Fig. 2 along A-A;
Fig. 4 is the arrangement schematic diagram of rotor disk permanent magnet;
Fig. 5 is stator coil winding schematic shapes;
Tu6Shi stator coils winding layout schematic diagram.
Each label in figure:1st, hollow spindle, 2, bearing (ball) cover, 3, upper rotor part disk, 4, bolt, 5, bearing, 6, stator coil Winding support, 7, permanent magnet, 8, stator coil winding, 9, casing, 10, lower rotor part disk, 11, through wires hole, 12, winding draws Line.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further:
As shown in figure 1, the stator iron-core-free main shaft is to magnetic flux permanent magnet generator, including main shaft, rotor and stator.Described fixed Son is fixed on the main shaft, and the rotor contains two rotor disks, and rotor disk is placed in stator both sides, is connected with the spindle mobility Connect.
The main shaft adopts hollow spindle 1.
The rotor includes upper and lower two rotor disks 3 and 10, and the permanent magnet 7 on rotor disk 3 and 10 up and down, rotor around Its hollow spindle 1 for supporting rotates, and hollow spindle 1 is support member, and relative rotor does not rotate.Rotor disk 3,10 passes through six up and down Bolt 4 is fixed on electric generator casing 9, i.e. rotor disk 3,10 and permanent magnet 7 and casing composition rotary part.
The permanent magnet 7 of two kind different magnetic poles angles is correspondingly arranged on upper and lower two rotor disk 3 and 10 respectively, and along hollow master There is certain air gap distance between the winding coil of stator described in 1 axially facing of axle, permanent magnet and the stator, in rotor disk The N pole and S pole of permanent magnet 7 is along the circumferential direction alternately placed in side(As shown in Figure 4), and make on rotor disk 3 and 10 along main shaft to The face opposite polarity of two pieces of relative permanent magnets, i.e. both magnetizing directions along main shaft to conversely, one one down upward, The pole embrace of the two is also differed simultaneously, while being similar to along main shaft therewith to distribution, i.e. along the circumferential direction go up, adjacent Two pieces of permanent magnet magnetizing directions are conversely, pole embrace.
The magnetic pole logarithm of the rotor disk is the positive integer more than 10, that is to say, that on each rotor disk, permanent magnet number is 20 more, and permanent magnet number=magnetic pole logarithm × 2 on a rotor disk, the electromotor pole embrace are taken between 0.7-0.8 Arbitrary Digit, then permanent magnet pole angle=pole embrace × magnetic pole logarithm/180, adjacent on special rotor disk 3 and 10 up and down and The pole embrace of two pieces of relative permanent magnets is different, that is, magnetic pole angle is different, i.e., magnetic pole angle one is big, and one is little, this Two groups of pole embraces of invention are 0.7 and 0.8 respectively.
As shown in Figure 2,3,7 shape of permanent magnet is to cut cheese, cuts cheese permanent magnet and is cut into tool similar to by circular permanent magnet There is the shape of certain magnetic pole angle;7 shape of permanent magnet can also be track type, and track type permanent magnet is by permanent magnet straight line portion There is level to repack the shape of magnetic pole angle into.It is preferred that the purpose of 7 shape of the permanent magnet is, permanent magnet material is made full use of Material, reaches the purpose for improving permanent magnet utilization rate.Particularly, 7 first type surface of permanent magnet is in plane, in rotor disk face, with Relative another side be designed to circular arc towards the one side of coil raised, the axially opposed arrangement of circular arc crowning, its convexity The circular arc main shaft for rising is overlapped with 7 main shaft of permanent magnet, and preferably circular arc bulge-structure purpose is to improve power generator air gap sine Distribution Characteristic of Magnetic Field so that air-gap field is close to sineization, ultimately facilitates reduction electromotor harmonic wave, improves electric energy output Quality.
Rb-Fe-B material of 7 material of permanent magnet using high energy product.
On the whole in iron-core-free and tooth slot structure, iron-core-free causes motor almost without magnetic hysteresis and eddy-current loss, keeps away stator The impact for needing to overcome cogging torque power when wind-driven generator is started is exempted from, anodontia slot structure causes coil winding more freely spirit Living, save the constraint of slot form.
The stator includes stator coil winding 8 and stator support 6, winding coil injection molding is added through epoxy resin Work, stator coil winding 8 and support member 6 are fixed together, on hollow spindle 1, the lead-out wire of wherein coil windings 8 12 apertures 11 on the hollow spindle 1 are drawn, and the stator relative rotor is static.In sum, stator coil winding 8, Support member 6 and the composition stationary parts of hollow axle 1.
As shown in Figure 5,6, stator coil winding 8 is shaped as rhombus or taper, preferably iron-free cored structure, rhombus or taper Coil shape purpose is that its shape is comparable to permanent magnet 7 so that corresponding with 7 circular arc portion of the permanent magnet coiler part is led Body effectively, also can effective cutting magnetic line, induce electric energy, also reduce end turn length, relative reduces copper Consumption, improves generating efficiency.
Using the concentratred winding for not overlapping three-phase symmetrical, coil count has motor number of pole-pairs and coil to stator coil winding 8 Angle determines, that is to say, that coil number=360 × magnetic pole logarithm/coil angle, particularly points out here, and coil angle is electric Angle on-mechanical angle, electric angle=magnetic pole logarithm × 360, as θ p/ θ c>When 0.4(Such as Fig. 5, electricity consumption angle, θ c is represented here Width of the coil at certain Radius), coil angle takes 220-260 °, and coil angle involved in the present invention is according to maximum one group Pole embrace is chosen, i.e., and 0.7 and 0.8, coil angle takes 240 ° of electrical angle.
The support member 6 of stator coil winding 8 extends out to the inner side of winding 8 from hollow spindle 1 along radial direction, supports Part 6 is arranged in the middle of two rotor disks 3 and 10, i.e., in the centre of the arc surface of 7 projection of upper and lower permanent magnet, stator support 6 passes through Interference fit is nested on hollow spindle 1, and with respect to the rotor remains stationary, the arc surface of permanent magnet is with stator coil surfaces most Short distance is 0.5-2.0mm.
Base bearing part 5 is arranged on 1 outer surface of hollow spindle, and metal (upper 5 turns to being embedded in two respectively along main shaft The interior hole portion of sub-disk 3 and 10, and equal with the distance between rotor disk 3 and 10, metal (upper 5 can make rotor around hollow spindle 1 Rotation, while support rotor weight and the load being applied on rotor, metal (upper 5 to be respectively equipped with sealing outward along main shaft The main bearing end cover 2 of effect.
As described above, present configuration is simply compact, electric motor starting is spry and light, is highly suitable for gentle wind power generation system, Have startup generating rotating speed low, generating efficiency and quality are high, and smooth running is lost low advantage.
It should be pointed out that being noted that without departing from the claims in the present invention for those skilled in the art The protection domain that is asked, and without prejudice in the case of present inventive concept, equivalent can be made to the specific embodiment Substitute or obvious modification, and some improvement or retouching.

Claims (6)

1. a kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator, including main shaft, rotor and stator, the stator is fixed Connect the main shaft, the rotor contains two upper rotor part disks for being symmetrically distributed in the stator both sides(3)With lower rotor part disk(10), Rotor disk(3、10)Inner side is equipped with permanent magnet towards the stator(7), rotor disk is bearing on the main shaft, and and electromotor Casing(9)It is fixedly connected, it is characterised in that:Permanent magnet(7)It is shaped as containing pole embrace of different sizes and surface circular arc is raised Cheese or track type is cut, and is along rotor disk(3、10)Multiple permanent magnets of circumferential directions, uniform alternately placement N poles and S Pole, and adjacent permanent magnet along the circumferential direction is different with along the relative permanent magnet pole embrace of the major axes orientation, pole embrace 0.7 and 0.8 is taken respectively;
The stator includes stator coil winding(8)And its support member being fixed together(6), stator coil winding(8)Pass through Support member(6)It is fixedly connected with the main shaft;
Stator coil winding(8)Using the centralized winding of the monolayer for not overlapping three-phase symmetrical, rhombus or taper, iron-core-free is shaped as And tooth slot structure.
2. the iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 1, it is characterised in that:Permanent magnetism Body(7)First type surface is in plane, installed in rotor disk(3、10)On face, another side on the other side is raised in circular arc, and circular arc is raised Face is positioned opposite along major axes orientation.
3. the iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 2, it is characterised in that:Permanent magnetism Body(7)Total number is the even number more than 40, and magnetizing direction is axial direction.
4. iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 3, it is characterised in that:Stator line Circle winding(8)Coil electric angle, span be 220-260 °.
5. iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 4, it is characterised in that:Stator line Circle winding(8)Coil electric angle, takes 240 °, and coil number sum is the positive integer that can be divided exactly by 3.
6. iron-core-free double air gaps axial flux permanent magnet wind-driven generator according to claim 5, it is characterised in that:The master Axle is hollow spindle(1), hollow spindle(1)It is provided with stator coil winding(8)Lead-out wire(12)Through wires hole(11).
CN201510057751.1A 2015-02-04 2015-02-04 A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator Expired - Fee Related CN104578634B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510057751.1A CN104578634B (en) 2015-02-04 2015-02-04 A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510057751.1A CN104578634B (en) 2015-02-04 2015-02-04 A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator

Publications (2)

Publication Number Publication Date
CN104578634A CN104578634A (en) 2015-04-29
CN104578634B true CN104578634B (en) 2017-03-15

Family

ID=53094043

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510057751.1A Expired - Fee Related CN104578634B (en) 2015-02-04 2015-02-04 A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator

Country Status (1)

Country Link
CN (1) CN104578634B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107154714A (en) * 2017-07-12 2017-09-12 上海僖舜莱机电设备制造有限公司 Temp auto-controlled disc type high-power density generator
CN107979256A (en) * 2017-12-28 2018-05-01 山西东辉新能源动力研究院有限公司 A kind of ultralight axial magnetic field wheel hub motor
CN111384796A (en) * 2018-12-29 2020-07-07 上海微创心力医疗科技有限公司 Motor stator, die and method for manufacturing motor stator, motor and catheter pump
CN109742916A (en) * 2019-02-21 2019-05-10 郑州大学 A kind of permanent magnetism list stator and double-rotor disc type electric machine weakening cogging torque
CN109687670A (en) * 2019-02-28 2019-04-26 郑州大学 A method of weakening desk permanent-magnet list stator and double-rotor slot machine cogging torque
CN112392661B (en) * 2019-08-16 2021-11-02 长沙理工大学 Oscillating wind power generation equipment with adjustable frequency
CN113217284B (en) * 2021-05-17 2022-07-22 广州赛特新能源科技发展有限公司 Direct-drive breeze wind driven generator system
CN114400811B (en) * 2021-12-30 2024-05-14 华中科技大学 Multi-disc motor stator coil structure and multi-disc motor comprising same
CN115864760B (en) * 2023-02-07 2023-05-05 常州双联磁电科技有限公司 Coil device, axial flux motor and manufacturing method of coil device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100803570B1 (en) * 2006-06-20 2008-02-15 엘지전자 주식회사 Axial air-gap type motor
CN101951106B (en) * 2010-08-06 2013-01-23 深圳创维-Rgb电子有限公司 Ultrathin high-power direct current magnetoelectric motor
KR101398680B1 (en) * 2013-02-25 2014-05-27 호남대학교 산학협력단 Afpm generator for small wind turbines
CN204361870U (en) * 2015-02-04 2015-05-27 河南理工大学 The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator

Also Published As

Publication number Publication date
CN104578634A (en) 2015-04-29

Similar Documents

Publication Publication Date Title
CN104578634B (en) A kind of iron-core-free double air gaps axial flux permanent magnet wind-driven generator
CN201118413Y (en) Disk three-phase brushless permanent magnetic DC electromotor
CN103178668B (en) Radial magnetic field double-stator vernier motor
CN204361870U (en) The two air-gap shaft of a kind of iron-core-free is to flux permanent magnet wind generator
CN105453394B (en) A kind of double-rotor machine and fan, compressor using this motor
CN103219814A (en) Asynchronous starting permanent magnet synchronous motor rotor based on permanent magnets with different residual magnetic densities
CN203406693U (en) Rotor punching sheet of permanent-magnet synchronous servo motor
CN102005835A (en) Halbach outer rotor doubly salient motor
CN202949297U (en) Motor rotor and high-speed permanent magnet generator
CN206259836U (en) A kind of combination sinus type disc type iron core-free permanent-magnetic wind driven generator
CN107508439A (en) A kind of permanent magnetism combines generator more
CN102035324A (en) Double-stator permanent magnet generator
CN103780036A (en) Dual-stator structure type high temperature superconducting permanent magnet wind driven generator
CN113178961A (en) Axial modularization magnetic flux reverse motor
CN102868246B (en) High-capacity low-speed permanent-magnet wind-driven generator
CN202565053U (en) Magnetic-field automatic accelerating permanent-magnet wind driven generator
CN201928170U (en) Double-stator permanent magnet generator
CN203734486U (en) High-temperature superconductive permanent-magnetic aerogenerator with double-stator structure
CN206620033U (en) A kind of permanent-magnet synchronous electric motor for compressor
CN206759181U (en) A kind of stator permanent-magnet motor
CN212033854U (en) Permanent magnet synchronous motor with double-armature radial magnetic circuit structure
CN104467339B (en) Linear vibration motor with gravity compensation function
CN210041604U (en) 24 groove 10 utmost point axial magnetic current motor and electric vehicle
CN103532272B (en) Brushless, permanently excited direct current motor rotor
CN105915024A (en) High-performance field modulation magnetic gear

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170315

Termination date: 20200204

CF01 Termination of patent right due to non-payment of annual fee