CN109391066A - A kind of motor - Google Patents
A kind of motor Download PDFInfo
- Publication number
- CN109391066A CN109391066A CN201710682547.8A CN201710682547A CN109391066A CN 109391066 A CN109391066 A CN 109391066A CN 201710682547 A CN201710682547 A CN 201710682547A CN 109391066 A CN109391066 A CN 109391066A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- winding
- connector
- coiling
- mounting base
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/12—Machines characterised by the bobbins for supporting the windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Abstract
The present invention relates to a kind of motors, including magnetic core, are installed to the insulating frame of magnetic core axial end；The magnetic core includes yoke portion and several teeth for inwardly stretching out from yoke portion, the insulating frame includes interconnecting piece, the interconnecting piece is installed to the axial end face of the magnetic core, the interconnecting piece has the guiding piece for connecting the connector of the coiling of winding and for guiding coiling, the connector is located off the position of the circumferential end of corresponding teeth, and the position that the guiding piece is located at face corresponding teeth is used to guide the coiling come out from the connector in order to which coiling is wound up into corresponding teeth to form winding.Implementing the present invention can be improved copper factor, prevent coiling from wearing, and improve winding efficiency.
Description
[technical field]
The present invention relates to a kind of motors, especially the motor with magnetic core, winding and winding insulation frame.
[background technique]
Usually come insulation stator winding and stator core using insulating frame in the industry.In coiling stator winding, usually first will
Winding coiling is articulated on the connector of the close stator tooth on insulating frame, is then again wound up into coiling and is covered with insulating frame
Stator tooth.This kind of scheme will lead to winding coiling and be difficult to cling to the bottom of tooth socket, reduce copper factor, and in winding process
It is easily damaged.
[summary of the invention]
The purpose of the present invention is improve the copper factor of machine winding and prevent coiling from wearing.
A kind of motor provided by the invention including magnetic core, is installed to the insulating frame of magnetic core axial end；The magnetic core includes yoke
Portion and several teeth inwardly stretched out from yoke portion, the insulating frame include interconnecting piece, and the interconnecting piece is installed to the magnetic core
Axial end face, the interconnecting piece have the guiding piece for connecting the connector of the coiling of winding and for guiding coiling, institute
The position that connector is located off the circumferential end of corresponding teeth is stated, the guiding piece is located at the position of face corresponding teeth for guiding
The coiling come out from the connector is in order to being wound up into corresponding teeth for coiling to form winding.
Further, the insulating frame further include be connected to the interconnecting piece several yoke portions insulation division and several teeth portion it is exhausted
Edge, yoke portion insulation division cover the inner wall in the yoke portion, and the teeth portion insulation division is attached to corresponding tooth along axial set, to
Coiling and magnetic core are separated.
Further, yoke portion insulation division, teeth portion insulation division are alternately arranged, and are sequentially connected with and to form annular.
Further, the guiding piece is located in the same face with the center line of corresponding teeth portion insulation division.
Further, the motor includes the PCB circuit board for being installed to the insulating frame axial end, the connector difference
Coiling with the PCB circuit board, winding is conductively connected, to realize the conductive connection between PCB circuit board and the winding.
Further, the periphery of the PCB circuit board has the first recess corresponding with the connector or first through hole
It is passed through for the connector.
Further, the motor includes the PCB circuit board for being installed to the insulating frame axial end；The interconnecting piece is equipped with
Circuit board mounting base, the circuit board mounting base include the base portion stretched out from the interconnecting piece, and the PCB circuit board sets aside to institute
State base portion.
Further, the circuit board mounting base is located at the position of face corresponding teeth, the circuit board mounting base or institute
Base portion is stated as the guiding piece.
Further, the circuit board mounting base is located at the position of face corresponding teeth, and the winding is three-phase windings, described
Connector is four, and the both ends of every phase winding are connected respectively to corresponding two connectors to form star-like connection, every phase around
The starting point of group winds corresponding connector, and every phase winding is wound to through the guidance of adjacent guiding piece or circuit board mounting base to be drawn
The tooth of guiding element or circuit board mounting base face.
Further, the periphery of the PCB circuit board has the first recess corresponding with the connector or first through hole
It is passed through for the connector.
Further, the positioning region is inserted into the PCB circuit board periphery and is equipped with the second recess or the second through-hole, the electricity
Road plate mounting base further includes from the positioning region that the base portion stretches out, and the second of the PCB circuit board periphery is inserted into the positioning region
Recess or the second through-hole.
Further, the magnetic core is stator core, and the tooth is stator tooth；The motor includes being installed in stator
Rotor, the rotor include shaft and the permanent magnet fixed to shaft.
Implement the present invention, under the cooperation of connector and guiding piece, the initial wire turn of winding can stick on the bottom of tooth socket,
It to improve copper factor, and can prevent coiling from wearing, improve winding efficiency.
[Detailed description of the invention]
Fig. 1 is a kind of structural schematic diagram for motor that one embodiment of the invention provides；
Fig. 2 is the perspective view of the explosion of motor shown in Fig. 1；
Fig. 3 is the floor map of the stator core of motor shown in Fig. 1, winding, insulating frame；
Fig. 4 is the floor map of stator core shown in Fig. 3；
Fig. 5 is the floor map that the insulating frame of stator core axial end is installed to shown in Fig. 3；
Fig. 6 is the stereoscopic schematic diagram of insulating frame shown in Fig. 5；
Fig. 7 be the PCB circuit board of motor shown in Fig. 1, insulating frame, stator core structural schematic diagram；
Fig. 8 is three-phase windings and the floor map of corresponding connector, guiding piece of motor shown in Fig. 1；
Fig. 9 is the connection relationship diagram of three-phase windings shown in Fig. 8, connector, guiding piece.
[specific embodiment]
The invention will be further described with reference to the accompanying drawings and examples.
With reference to Fig. 1, a kind of motor 100 provided by the invention, including stator 20 and the rotor being installed in stator 20 80,
Rotor 80 can the rotation of relative stator 20.Rotor 80 includes shaft 81, and one end of shaft 81 is stretched out external to realize except stator 20
Driving.
With reference to Fig. 2, stator 20 includes the shell 21 of tubular, is installed to the end cap 22 of 21 open end of shell and is installed to outer
Stator core 23 in shell 21, is set around stator core 23 at the insulating frame 25 and 26 for being respectively installed to 23 both ends of stator core
Winding 24 etc. is separated between winding 24 and stator core 23 by corresponding insulating frame 25,26.
Stator 20 further includes the cricoid PCB circuit board 50 being mounted between insulating frame 25 and end cap 22.PCB circuit board 50
It is electrically connected equipped with power supply circuit with winding 24, for controlling the operating of motor 100.PCB circuit board 50 is equipped with attachment base or cable
(not shown) is connect with external power supply, and end cap 22 is equipped with through-hole 222 and passes through for the attachment base or cable.
Stator 20 further includes the insulating sleeve being installed in cylindrical case 21 and around insulating frame 25 and PCB circuit board 50
27, insulating sleeve 27 is for protecting PCB circuit board 50 and avoiding occurring between PCB circuit board 50 and shell 21 undesired short
Road.Preferably, insulating sleeve 27 supports the axial end face of stator core 23, and the outer wall of periphery and stator core 23 is put down substantially
Together.
In the present embodiment, rotor 80 (is not shown including the annular rotor magnetic core that shaft 81, fixing sleeve are set to shaft 81 in figure
Show) and permanent magnet 83 fixed to rotor magnetic core periphery, permanent magnet 83 be annular permanent magnets.Rotor 80 of the invention does not limit to
In this kind of structure, for example, permanent magnet 83 is the blocky permanent magnet for being embedded into rotor magnetic core in the scheme of replacement, or straight
Connect the permanent magnet (that is, without using rotor magnetic core) fixed to shaft 81.
In the present embodiment, rotor 80 further includes the balancing frame 82 that fixing sleeve is set to shaft 81, and balancing frame 82 is two, respectively
Positioned at two outer ends of rotor magnetic core, for the center of rotor 80 to be adjusted to the center of rotation of rotor 80.In addition, rotor 80 is also
The cyclic annular detection magnet 84 of shaft 81 is set to including fixing sleeve, detection magnet 84 rotates to rotate in rotor 80 with rotor 80
When form rotary magnetic field.Correspondingly, PCB circuit board 50 connects position sensor such as Hall sensor for incuding detection magnetic
The rotary magnetic field of body 84, to detect the rotation of rotor 80.
Bearing 221 that shaft 81 is mounted in end cap 22 and the bearing 211 for being installed to 21 bottom of shell support, so that
Rotor can the rotation of relative stator 20.One end of shaft 81 is stretched out from the bottom of shell 21, for externally driving.
With reference to Fig. 3, Fig. 4 and Fig. 5, if stator core 23 includes cricoid yoke portion 231 and inwardly stretches out from yoke portion 231
Dry stator tooth 232.A space is enclosed between several stator tooths 232, rotor 80 is located in the space, the permanent magnet of rotor 80
There is air gap between 83 and stator tooth 232.Tooth socket 233 is formed between two adjacent stator tooths 232.Insulating frame 25,26 is distinguished
Stator core 23 is attached to from 23 both ends of stator core along axial set.Winding 24 is set around the stator tooth covered by insulating frame 25,26
232 and it is contained in corresponding tooth socket 233, so that insulating frame 25,26 be made to separate winding 24 and stator core 23.
With reference to Fig. 5 and Fig. 6, insulating frame 25 is annular in shape on the whole, including cricoid interconnecting piece 251 and is connected to interconnecting piece
Several teeth portion insulation divisions 252, several yoke portions insulation division 254 of 251 one end.Interconnecting piece 251 is installed to the yoke portion of stator core 23
231 axial end face.The arc-shaped plate of each yoke portion insulation division 254, is protruded into corresponding tooth socket 233, will be in the tooth socket 233
Winding 24 and the inner wall in the yoke portion 232 of the stator core 23 in the tooth socket 233 separate.Each teeth portion insulation division 252 is along axial direction
Set is attached to a corresponding stator tooth 232 and protrudes into tooth socket 233, and stator tooth 232 and winding 24 are separated.Teeth portion insulation division
252 shape is matched with the shape of the tooth body of stator tooth 232, crown.Several teeth portion insulation divisions 252, several yoke portions insulation division 254
It is along the circumferential direction alternately arranged and is sequentially connected with and circularize, so that the winding 24 in tooth socket 233 be separated with stator core 23.It is excellent
Selection of land, the intermediate indent of teeth portion insulation division 252, by the limit of winding 24 the end of interconnecting piece 251 and teeth portion insulation division 252 it
Between.
In other embodiments, teeth portion insulation division 252, yoke portion insulation division 254 can be insulating paper.
The structure of insulating frame 26 and insulating frame 25 are essentially identical, repeat no more.
With reference to Fig. 6 and Fig. 7, the interconnecting piece 251 of insulating frame 25 be equipped with it is multiple along motor 100 it is axially extending for connecting
The connector 255 of winding coiling, in the present embodiment, connector 255 has 4, for the ferromagnetism steel plate for being embedded into interconnecting piece 251.
Connector 255 is located off the position of the circumferential end of corresponding stator tooth 232, that is, deviates teeth portion insulation division 252.Coiling around
When group 24, coiling is first articulated to corresponding connector 251, then winds corresponding teeth portion insulation division 252 again.
The end of connector 255 is each passed through the first recess 51 or first through hole in PCB circuit board 50, and electric with PCB
Circuit electrical connection in road plate 50.
Insulating frame 25 further includes being integrally formed at interconnecting piece 251 and protruding from the guiding piece 256 of interconnecting piece 251 and several
Circuit board mounting base 257.Guiding piece 256 and circuit board mounting base 257 are located at the position that face corresponds to stator tooth 232, that is, deviate
Yoke portion insulation division 254.Guiding piece 256 is used to for the initial wire turn of winding 24 being directed to the position for 233 bottom of tooth socket that reclines, circuit
Plate mounting base 257 is used to support circuit board 50, and some or all of circuit board mounting base 257 can also be used for winding 24 is initial
Wire turn be directed to the position of 233 bottom of tooth socket that reclines.Connector 255 is used to mount the beginning or end of winding coiling, is located at
Deviate the position of the circumferential end of corresponding stator tooth 232, and guiding piece 256 (if any), the circuit board of stator tooth 232 corresponding with this
Mounting base 257 (if any) is adjacent.
For example, the coiling 241 at a certain 24 beginning of phase winding is articulated to after connector 255a, by adjacent with reference to Fig. 6
After the guidance of guiding piece 256, start to wind several circles of the corresponding corresponding stator tooth 232 of teeth portion insulation division 252a, thus coiling
At corresponding winding 24.Under the guidance of the guiding piece 256, the initial wire turn of the winding 24 can recline tooth socket 233 bottom (that is,
The junction of teeth portion insulation division 252 and yoke portion insulation division 254), to ensure copper factor.If winding coiling 241 is from connector
255a come out after just directly wind stator tooth 232, due to connector 255a deviate teeth portion insulation division 242, the winding 24 initially
Wire turn is difficult to recline the bottom of tooth socket 233, reduces copper factor, and there is collided with by coil winding machine for this section of winding coiling 241
And it rubs and impaired risk with subsequent winding coiling 241.
Each circuit board mounting base 257 includes being formed in the base portion 258 of interconnecting piece 251 and determining from what base portion 258 stretched out
Position portion 259, the size of base portion 258 are larger to form step for placing PCB circuit board in the position connecting with positioning region 259
50, positioning region 259 then across PCB circuit board 50 the second recess 52 or the second through-hole for position, connection PCB circuit board.It is excellent
Selection of land, these circuit board mounting bases 257 form be no less than 2 steps altogether, support PCB circuit board 50 to determine a plane.
In the present embodiment, circuit board mounting base 257 is four, and four circuit board mounting bases 257 are about central symmetry.This
A little circuit board mounting bases 257 form 4 coplanar steps to support PCB circuit board 50.
It is to be appreciated that circuit board mounting base 257 can be other quantity, central symmetry can not be in order to limit
The installation site of PCB circuit board 50 realizes the fool-proof design in 50 assembling process of PCB circuit board.
The base portion 258 of circuit board mounting base 257 or circuit board mounting base 257 can be used as guiding piece 256.That is,
Guiding piece 256 can be independent component, be also possible to a part of circuit board mounting base 257 or circuit board mounting base 257.
In the present embodiment, circuit board mounting base 257 and guiding piece 256 are shaped in insulating frame 25, and connector 255 is one
End is embedded into the metalwork of insulating frame 25.
With reference to Fig. 8 and Fig. 9, in the present embodiment, winding 24 is the three-phase windings of star-like connection, and three-phase windings are respectively U phase
Winding, V phase winding and W phase winding.Stator core 23 includes 6 stator tooths 232, so that every phase winding includes two windings, it should
Two windings, two stator tooths 232 opposite wound on diameter respectively.For ease of description, along clockwise direction, by 6 around component
It is not named as U1 winding, W1 winding, V1 winding, U2 winding, W2 winding and V2 winding.Connector 255 is 4, is respectively designated as
255a, 255b, 255c, 255d, wherein connector 255a is connected to one end of U phase, V phase and W phase winding, the other three connection
Part 255b, 255c and 255d distinguish another end of U phase, W phase and V phase.The winding process of the three-phase windings is as follows:
Coiling from connector 255b come out after, draw through adjacent guiding piece (by circuit board mounting base 258a as guiding piece)
Winding U1 is formed with the first coiling direction after leading, then, winding U2 is formed with the first coiling direction and is articulated to connector 255a.
Then, after coiling comes out from connector 255a, winding W2 is formed with the second coiling direction after adjacent guiding piece 256 guides,
Then, winding W1 is formed with the second coiling direction and is articulated to connector 255c.The winding process of V phase is similar with U, coiling from
After connector 255d comes out, after adjacent guiding piece (by circuit board mounting base 258b as guiding piece) guides with the first volume around
Direction forms winding V1, then, forms winding V2 with the first coiling direction and is articulated to connector 255a.The first direction and
Two is contrary, for example, being clockwise, counterclockwise respectively.
In this way, connector 225a can be used as the starting point end of the W phase winding of three-phase windings while make the terminal of U, V phase winding
End, starting point end of the connector 255b as U phase winding, destination terminal of the connector 255c as W phase winding, connector 255d conduct
The starting point end of V phase winding.The starting point end of each phase winding is wound on after corresponding connector through adjacent guiding piece or as guidance
The winding since the stator tooth of face after the circuit board mounting base of part, the bootable winding of guiding piece recline the bottom of corresponding tooth socket
And the side of corresponding stator tooth starts winding, reduce copper factor and can avoid winding it is hanging and with subsequent winding friction and
It is impaired.
In other embodiments, teeth portion insulation division 252 can be replaced with yoke portion insulation division 254 by insulating paper.
Above embodiments only express the preferred embodiment of the present invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, such as special to the difference in each embodiment
Sign is combined, and these are all within the scope of protection of the present invention.
Claims (12)
1. a kind of motor, including magnetic core, it is installed to the insulating frame of magnetic core axial end；The magnetic core include yoke portion and from yoke portion to
Several teeth of interior stretching, which is characterized in that the insulating frame includes interconnecting piece, and the interconnecting piece is installed to the axial direction of the magnetic core
End face, the interconnecting piece have the guiding piece for connecting the connector of the coiling of winding and for guiding coiling, the company
Fitting is located off the position of the circumferential end of corresponding teeth, and the guiding piece is located at the position of face corresponding teeth for guiding from institute
The coiling that connector comes out is stated in order to which coiling is wound up into corresponding teeth to form winding.
2. motor according to claim 1, which is characterized in that if the insulating frame further includes being connected to the interconnecting piece
Dry yoke portion insulation division and several teeth portion insulation divisions, yoke portion insulation division cover the inner wall in the yoke portion, the teeth portion insulation division
It is attached to corresponding tooth along axial set, to separate coiling and magnetic core.
3. motor according to claim 2, which is characterized in that yoke portion insulation division, teeth portion insulation division are alternately arranged, and
It is sequentially connected with to form annular.
4. motor according to claim 2, which is characterized in that the center line of the guiding piece and corresponding teeth portion insulation division
In the same face.
5. motor according to claim 1, which is characterized in that the motor includes being installed to the insulating frame axial end
PCB circuit board, the connector is conductively connected with the coiling of the PCB circuit board, winding respectively, to realize PCB circuit board
With the conductive connection between the winding.
6. motor according to claim 5, which is characterized in that the periphery of the PCB circuit board has and the connector
Corresponding first recess or first through hole are passed through for the connector.
7. motor according to claim 1, which is characterized in that the motor includes being installed to the insulating frame axial end
PCB circuit board；The interconnecting piece is equipped with circuit board mounting base, and the circuit board mounting base includes the base stretched out from the interconnecting piece
Portion, the PCB circuit board set aside to the base portion.
8. motor according to claim 7, which is characterized in that the circuit board mounting base is located at the position of face corresponding teeth
It sets, the circuit board mounting base or the base portion are as the guiding piece.
9. motor according to claim 7, which is characterized in that the circuit board mounting base is located at the position of face corresponding teeth
It sets, the winding is three-phase windings, and the connector is four, and the both ends of every phase winding are connected respectively to corresponding two connections
To form star-like connection, the starting point of every phase winding is wound after corresponding connector through adjacent guiding piece or as guidance part
The guidance of the circuit board mounting base of part is wound to the tooth and another tooth corresponding with the tooth of guiding piece or circuit board mounting base face.
10. motor according to claim 7, which is characterized in that the periphery of the PCB circuit board has and the connector
Corresponding first recess or first through hole are passed through for the connector.
11. motor according to claim 7, which is characterized in that the positioning region is inserted into the PCB circuit board periphery and is equipped with
Second recess or the second through-hole, the circuit board mounting base further include from the positioning region that the base portion stretches out, and the positioning region is inserted
Enter the second recess or the second through-hole of the PCB circuit board periphery.
12. motor according to claim 1, which is characterized in that the magnetic core is stator core, and the tooth is stator tooth；
The motor includes the rotor being installed in stator, and the rotor includes shaft and the permanent magnet fixed to shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710682547.8A CN109391066B (en) | 2017-08-10 | 2017-08-10 | Electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710682547.8A CN109391066B (en) | 2017-08-10 | 2017-08-10 | Electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109391066A true CN109391066A (en) | 2019-02-26 |
| CN109391066B CN109391066B (en) | 2020-11-06 |
Family
ID=65414614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710682547.8A Active CN109391066B (en) | 2017-08-10 | 2017-08-10 | Electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109391066B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756127A (en) * | 2019-03-28 | 2020-10-09 | 无锡飞翎电子有限公司 | Stator module, motor and washing machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201450371U (en) * | 2009-04-29 | 2010-05-05 | 中山大洋电机股份有限公司 | Stator structure of three-phase motor |
| CN102545450A (en) * | 2010-12-23 | 2012-07-04 | 罗伯特·博世有限公司 | Winding support of single tooth winding for insulation motor |
| US20130181556A1 (en) * | 2012-01-17 | 2013-07-18 | Regal Beloit America, Inc. | Electric motor |
-
2017
- 2017-08-10 CN CN201710682547.8A patent/CN109391066B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201450371U (en) * | 2009-04-29 | 2010-05-05 | 中山大洋电机股份有限公司 | Stator structure of three-phase motor |
| CN102545450A (en) * | 2010-12-23 | 2012-07-04 | 罗伯特·博世有限公司 | Winding support of single tooth winding for insulation motor |
| US20130181556A1 (en) * | 2012-01-17 | 2013-07-18 | Regal Beloit America, Inc. | Electric motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756127A (en) * | 2019-03-28 | 2020-10-09 | 无锡飞翎电子有限公司 | Stator module, motor and washing machine |
| CN111756127B (en) * | 2019-03-28 | 2022-03-25 | 无锡飞翎电子有限公司 | Stator module, motor and washing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109391066B (en) | 2020-11-06 |
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