CN108063508A - A kind of circle fractional-slot winding and with its disc type iron core-free motor - Google Patents
A kind of circle fractional-slot winding and with its disc type iron core-free motor Download PDFInfo
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- CN108063508A CN108063508A CN201711463577.6A CN201711463577A CN108063508A CN 108063508 A CN108063508 A CN 108063508A CN 201711463577 A CN201711463577 A CN 201711463577A CN 108063508 A CN108063508 A CN 108063508A
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- 238000010586 diagram Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- 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
- H02K3/47—Air-gap windings, i.e. iron-free windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The invention discloses a kind of circular fractional-slot winding and with its disc type iron core-free motor, the circle fractional-slot winding includes multiple circular coil units, each circular coil unit is formed by plain conductor coiling, and the circular coil unit is flat configuration, multiple circular coil units, which are sequentially connected, circularizes structure group.The present invention does not pass through pressing process due to circular coil unit, so that loop configuration group shows flat configuration on the whole, need not move through pressing process, coil will not be caused in itself in coiling stator coil to damage, and technique is simpler, production efficiency is improved, and is conducive to produce in batches.
Description
Technical field
The present invention relates to technical field of motors, and in particular to a kind of circle fractional-slot winding and with its disc type iron core-free
Motor.
Background technology
Motor refer to according to the law of electromagnetic induction realize electric energy conversion or transmission a kind of calutron or by one kind
The electric energy of form is converted into another form of electric energy.
The coil windings as motor stator are usually required by pressing process in the prior art so that coil has at least
The position of one protrusion, such as the China of Patent No. CN201020000451.2 and Patent No. CN201020547405.4
Patent, the coil as stator just have passed through pressing process.The stator coil produced by pressing process, not only technique answer
It is miscellaneous, and easily coil is caused in itself to damage, it is unfavorable for high-speed production and the batch production of stator coil.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of circular fractional-slot winding and with its disc type iron core-free
Motor, to solve the problems brought in traditional technology due to suppressing coil at least to a certain extent.
For this purpose, according in a first aspect, provide a kind of circular fractional-slot winding in a kind of embodiment, the circle fractional-slot around
Group includes：
Including multiple circular coil units, each circular coil unit is formed by plain conductor coiling, and the circle
Shape coil unit is flat configuration, and multiple circular coil units, which are sequentially connected, circularizes structure group.
Circular fractional-slot winding according to first aspect can also include following additional technical feature.
As the further alternative of the circular fractional-slot winding, the loop configuration group includes the first phase group, the
Two-phase group and third phase group, the first phase group, the second phase group and the third phase group export three-phase electricity jointly.
As the further alternative of the circular fractional-slot winding, the loop configuration group includes at least three metals
Conducting wire, three plain conductor correspondences turn to the first phase group, the second phase group and the third phase group.
As the further alternative of the circular fractional-slot winding, the first phase group, the second phase group and institute
Each stated in third phase group includes at least three circular coil units.
As the further alternative of the circular fractional-slot winding, the circle fractional-slot winding further includes binding
Line, the lashing wire are bundled on the plain conductor, for preventing that the cabling of the plain conductor is chaotic.
As the further alternative of the circular fractional-slot winding, the first phase group, the second phase group and institute
Third phase group is stated to be laminated by multiple circular coil units.
According to second aspect, a kind of disc type iron core-free motor is provided in a kind of embodiment, the disc type iron core-free motor bag
It includes：
Motor body, for generating rotary force；
Shaft, the shaft are mounted in the motor body, are realized and are rotated under the action of the rotary force；And
Circular fractional-slot winding according to above-mentioned first aspect, the circle fractional-slot winding are arranged on the motor
In main body.
As the further alternative of the disc type iron core-free motor, the motor body includes winding disk and is placed in institute
The left disk of winding disk both sides and right disk are stated, the circle fractional-slot winding is arranged in the winding disk, the left disk
It is fixedly connected with the right disk with the shaft.
As the further alternative of the disc type iron core-free motor, the motor body further include fixedly connected part,
Left end cap and right end cap, the fixedly connected part is through the left end cap and the right end cap and by the left end cap and right end cap
It is fixed together.
As the further alternative of the disc type iron core-free motor, the motor body further includes end cap, the end
It covers equipped with perforate, is equipped with pull box in the tapping, the leading-out terminal of the circle fractional-slot winding goes out from the tapping
Come and be connected to the pull box.
Beneficial effects of the present invention：
According to the circular fractional-slot winding in above example, since its entirety shows flat configuration, need not move through
Pressing process will not cause coil in itself to damage in coiling stator coil, and technique is simpler, and production efficiency obtains
It improves, is conducive to produce in batches.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of single circular coil list of the according to embodiments of the present invention one circular fractional-slot winding provided
The structure diagram of member；
Fig. 2 shows a kind of structure diagram of the according to embodiments of the present invention one circular fractional-slot winding provided；
Fig. 3 shows a kind of circular coil unit of the according to embodiments of the present invention one circular fractional-slot winding provided
It is stacked schematic diagram；
Fig. 4 shows a kind of sectional view of the according to embodiments of the present invention two disc type iron core-free motors provided；
Fig. 5 shows that a kind of structure of the winding disk of the according to embodiments of the present invention two disc type iron core-free motors provided is shown
It is intended to；And show a kind of outline drawing of the according to embodiments of the present invention two disc type iron core-free motors provided.
Main element symbol description：
1000- loop configuration groups；2000- motor bodies；3000- shafts；1100- the first phase groups；1200- the second phase groups；
1300- third phase groups；2100- winding disks；The left disks of 2200-；The right disks of 2300-；2400- fixedly connected parts；2500- left ends
Lid；2600- right end caps；2700- pull boxes；2800- bearings；3100- keyways；100- circular coil units；200- leads；300-
Lead terminal；400- lashing wires.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instructions such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be based on orientation shown in the drawings or
Position relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features contact directly or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward or is merely representative of fisrt feature level height less than second feature.
Embodiment one
The present embodiment one provides a kind of circular fractional-slot winding.
Please also refer to Fig. 1-2, which includes multiple circular coil units 100, each circular coil
Unit 100 is formed by plain conductor coiling, and circular coil unit 100 is flat configuration, and multiple circular coil units 100 are successively
It is connected to loop configuration group 1000.
In this way, since its entirety shows flat configuration, pressing process is needed not move through, it will not in coiling stator coil
Coil is caused in itself to damage, and technique is simpler, and production efficiency is improved, and is conducive to produce in batches.
It is understood that above-mentioned loop configuration group 1000 just constitutes the stator coil of motor, since it does not pass through
Pressing process can cause stator coil at least in a thickness direction smaller so that the volume smaller of stator coil, so as to
When being packaged to stator coil, quantity of material used in encapsulating can be reduced, reduces cost to a certain extent.The opposing party
Face since small and encapsulating material usage amount is reduced, can also so reduce stator coil or even entire motor simultaneously
Weight.
Further, since the stator coil in embodiment of the present invention is using fractional-slot winding, due to fractional-slot winding
There is short distance, the dosage of plain conductor can also be saved.It can also cause the electricity of motor using fractional-slot winding simultaneously
Gesture is more nearly sine wave, to improve the servo performance of motor.
It should be noted that in embodiment of the present invention, resin or poly- ammonia may be selected in encapsulating material mentioned above
Ester fixed sealing material, while some heat carriers etc. can also be added in above-mentioned material, which can be threadiness or piece
With non-conductive, permeance, the aforementioned circle fractional-slot winding i.e. heat dissipation performance of stator coil is improved with this for shape, this
It is of great significance for manufacturing powerful motor.
In addition, it is necessary to explanation, copper conductor may be selected in plain conductor mentioned hereinbefore, to ensure circular coil list
The stability of member 100 or loop configuration group 1000 at work.
It please refers to Fig.2, in embodiments of the present invention, aforementioned toroidal structure group 1000 includes the first phase group 1100, second
Phase group 1200 and third phase group 1300, the first phase group 1100, the second phase group 1200 and third phase group 1300 export three-phase electricity jointly.
Specifically, in order to form above-mentioned first phase group 1100, the second phase group 1200 or third phase group 1300, can pass through
A piece plain conductor coiling forms.Please also refer to Fig. 1, illustrated exemplified by forming the first phase group 1100：
Single circular coil unit 100 is turned to first：According to the inlet wire point of regulation and outlet point coiling, example
In example shown in Fig. 1, so that it may turn to first circular coil unit 100 successively according to inlet wire point a and outlet point b
, can also carry out coiling according to other inlet wire point and outlet point in other embodiments certainly；
Then the first phase group 1100 is turned to：Foregoing leading-out terminal is continued to turn to second round wire according to abovementioned steps
Coil unit 100 and the 3rd circular coil unit 100, at this time second circular coil unit 100 and the 3rd round wire
Coil unit 100 and first circular coil unit 100 of foregoing coiling are formed the first phase group 1100, and leading-out terminal is by drawing
Line 200 is drawn, and forms the lead terminal 300 of the first phase group 1100.
Second phase group 1200 and third phase group 1300 separately take a plain conductor according to above-mentioned steps coiling respectively.
Three-phase lead terminal 300 will be finally drawn after the completion of coiling.
It is understood that in the first phase group 1100, the second phase group 1200 and third phase group 1300 in above-described embodiment
Each include at least three circular coil units 100；Such as during 9 coil composition winding disks 2100, each round wire
Central angle corresponding to coil unit 100 is 40 degree.
Furthermore it is possible to be appreciated that, in order to form whole loop configuration group 1000, it is previously used for forming the first phase group
1100th, the inlet wire point of three plain conductors of the second phase group 1200 and third phase group 1300 can intersect at a point, real as shown in Figure 2
C points in example, i.e., the first end of three plain conductors intersect at a point, and the other end then draws and forms lead terminal 300 respectively.
Based on this, in order to ensure above-mentioned intersecting reliability, in some embodiments, pyrocondensation sleeve can also be set in the crosspoint
And copper button etc., it is attached by scolding tin.
In some embodiments, the cabling of plain conductor causes confusion during coiling in order to prevent, in metal
Lashing wire 400 can also be set, such as in the example shown in figure 2, lashing wire 400 is bundled in plain conductor except being formed on conducting wire
On remaining position of circular coil unit 100.
In some specific embodiments, nylon wire etc. may be employed in above-mentioned lashing wire 400.
It should be noted that it is foregoing be intended merely to it is for example bright from single circular coil unit 100 to entire ring junction
The formation of structure group 1000, it is possible to understand that can also loop configuration group 1000 be formed using other manner.In addition, previous embodiment
In loop configuration group 1000 include the first phase group 1100, the second phase group 1200 and third phase group 1300, it will be understood that other
Change can also be made in embodiment, in other words, the number of phase group is not construed as limiting.Meanwhile the first phase group 1100, the second phase group
1200 and third phase group 1300 in include there are three circular coil unit 100, it will be understood that in other embodiments, also
Change can be made, i.e., the number for the circular coil unit 100 that each phase group is included is not construed as limiting.
Please also refer to Fig. 1 and Fig. 3, in some embodiments, in order to enhance the electromagnetic efficiency of loop configuration group 1000
To produce high-power motor, the first phase group 1100, the second phase group 1200 and third phase group 1300 can be by multiple circular coils
Unit 100 is laminated.For example, it is stacked in a thickness direction or in circumferencial direction (i.e. along loop configuration group 1000
Circular direction) on be stacked, entirety shows flat configuration.
Embodiment two
The present embodiment two provides a kind of disc type iron core-free motor.
It please refers to Fig.4, which includes motor body 2000, shaft 3000 and circular fractional-slot winding.
Wherein, motor body 2000 is used to generate rotary force.Shaft 3000 is mounted in motor body 2000, in rotary force
Under the action of realize rotate, that is, realize motor function.Circular fractional-slot winding is discussed in detail in embodiment one, herein not
It repeats again.
In this way, by setting fractional-slot winding in disc type iron core-free motor, it may be such that the manufacture cost of motor is lower, body
Product smaller, and the manufacture craft of the disc type iron core-free motor is simplified so that the production efficiency of disc type iron core-free motor is able to
It improves, is conducive to produce in batches.Simultaneously as the use of fractional-slot winding, winding back emf waveform is more nearly sine wave, also
It can be so that the servo performance of disc type iron core-free motor be more preferable.
Further, incorporated by reference to reference to figure 5, motor body 2000 includes winding disk 2100 and is placed in 2100 both sides of winding disk
Left disk 2200 and right disk 2300, circular fractional-slot winding be arranged in winding disk 2100, left disk 2200 and right disk
2300 are fixedly connected with shaft 3000.
So far, apply electric current to circular fractional-slot winding and just may be such that left disk 2200 and right disk 2300 rotate, then
The rotation of shaft 3000 is driven, it is achieved thereby that the function of motor.
Specifically, above-mentioned left disk 2200 and right disk 2300 are made respectively by magnet steel, yoke, along with foregoing winding
Disk is formed the magnetic circuit system of motor, and the magnet steel that winding disk 2100 is powered in the rotating excitation field and left and right disk generated is mutual
Attract finally to generate rotary force.
In some specific embodiments, in order to complete left disk 2200 and right disk 2300 and the fixation of shaft 3000
Connection, keyway 3100 is provided in shaft 3000, left disk 2200 and right disk are achieved that thus by corresponding key
2300 are fixedly connected with shaft 3000.
Thus, it can be ensured that the face of left disk 2200 and right disk 2300 prevents the phenomenon that magnetic field is disorderly, to ensure
The normal work of motor.
In some embodiments, motor body 2000 further includes fixedly connected part 2400, and fixedly connected part 2400 passes through
Left end cap 2500 and right end cap 2600 and left end cap 2500 and right end cap 2600 are fixed together.
In some specific embodiments, screw or bolt etc. can be selected in above-mentioned fixedly connected part 2400.
Further, please also refer to Fig. 5, motor body 2000 further includes end cap, and end cap is equipped with perforate, in tapping
Equipped with pull box 2700, the leading-out terminal of circular fractional-slot winding comes out from tapping and is connected to pull box 2700 to ultimately form
Lead terminal 300.
It is closed specifically, end cap includes lid in the left end cap 2500 of left 2200 side of disk and lid conjunction in right disk 2300
The right end cap 2600 of side, outer envelope of the end cap as entire motor, can prevent some other foreign matter etc. from entering motor
Inside is to influence the normal performance of motor.
Further, in order to ensure the continuity and reliability of the above-mentioned rotation of shaft 3000, close to shaft on end cap
Bearing 2800 etc. is additionally provided at 3000.
In addition, be additionally provided with plain cushion or spring washer etc. in the junction of all parts, for example, fixedly connected part 2400 with
The junction of left disk 2200 or right disk 2300.
By being originally the description for inventing each embodiment above, the present invention at least possesses following technique effect：
1st, coil will not be caused in itself to damage；
2nd, simple for process, production efficiency is high, is conducive to produce in batches；
3rd, it is small, light-weight；
4th, it is at low cost；
5th, the servo performance of motor is more excellent.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms is not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It is combined in an appropriate manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the different embodiments described in this specification or example and different embodiments or exemplary feature
It closes and combines.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of circle fractional-slot winding, which is characterized in that including multiple circular coil units, each circular coil unit
It is formed by plain conductor coiling, and the circular coil unit is flat configuration, multiple circular coil units are sequentially connected
Circularize structure group.
2. circle fractional-slot winding as described in claim 1, which is characterized in that the loop configuration group include the first phase group,
Second phase group and third phase group, the first phase group, the second phase group and the third phase group export three-phase electricity jointly.
3. circle fractional-slot winding as claimed in claim 2, which is characterized in that the loop configuration group includes at least three gold
Belong to conducting wire, three plain conductor correspondences turn to the first phase group, the second phase group and the third phase group.
4. circle fractional-slot winding as claimed in claim 3, which is characterized in that the first phase group, the second phase group and
Each in the third phase group includes at least three circular coil units.
5. circle fractional-slot winding as claimed in claim 3, which is characterized in that the circle fractional-slot winding further includes binding
Line, the lashing wire are bundled on the plain conductor, for preventing that the cabling of the plain conductor is chaotic.
6. circle fractional-slot winding as claimed in claim 2, which is characterized in that the first phase group, the second phase group and
The third phase group is laminated by multiple circular coil units.
7. a kind of disc type iron core-free motor, which is characterized in that including：
Motor body, for generating rotary force；
Shaft, the shaft are mounted in the motor body, are realized and are rotated under the action of the rotary force；And
Circular fractional-slot winding as any one of claim 1-6, the circle fractional-slot winding are arranged on the electricity
In owner's body.
8. disc type iron core-free motor as claimed in claim 7, which is characterized in that the motor body includes winding disk and is placed in
The left disk and right disk of the winding disk both sides, the circle fractional-slot winding are arranged in the winding disk, the left magnetic
Disk and the right disk are fixedly connected with the shaft.
9. disc type iron core-free motor as claimed in claim 8, which is characterized in that the motor body, which further includes, to be fixedly connected
Part, left end cap and right end cap, the fixedly connected part is through the left end cap and the right end cap and by the left end cap and the right side
End cap is fixed together.
10. disc type iron core-free motor as claimed in claim 7, which is characterized in that the motor body further includes end cap, described
End cap is equipped with perforate, is equipped with pull box in the tapping, the leading-out terminal of the circle fractional-slot winding is from the tapping
Out and it is connected to the pull box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711463577.6A CN108063508A (en) | 2017-12-28 | 2017-12-28 | A kind of circle fractional-slot winding and with its disc type iron core-free motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711463577.6A CN108063508A (en) | 2017-12-28 | 2017-12-28 | A kind of circle fractional-slot winding and with its disc type iron core-free motor |
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| Publication Number | Publication Date |
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| CN108063508A true CN108063508A (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711463577.6A Pending CN108063508A (en) | 2017-12-28 | 2017-12-28 | A kind of circle fractional-slot winding and with its disc type iron core-free motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098681A (en) * | 2019-05-09 | 2019-08-06 | 上海大学 | A kind of disc type electric machine winding |
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|---|---|---|---|---|
| CN201113607Y (en) * | 2007-09-11 | 2008-09-10 | 郑役军 | Disc type stator and brushless iron core-free disc type electric motor embodying the stator |
| CN103107664A (en) * | 2013-02-06 | 2013-05-15 | 常州市吉士电器有限公司 | Armature plate and synchronous motor suitable for plate type coreless permanent magnet synchronous motor |
| CN207691551U (en) * | 2017-12-28 | 2018-08-03 | 山西东辉新能源动力研究院有限公司 | A kind of circle fractional-slot winding and the disc type iron core-free motor with it |
-
2017
- 2017-12-28 CN CN201711463577.6A patent/CN108063508A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110098681B (en) * | 2019-05-09 | 2022-01-07 | 上海大学 | Disc type motor winding |
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Application publication date: 20180522 |