CN108683319A - Low-speed high-thrust-density double-layer fractional slot winding cylindrical linear - Google Patents
Low-speed high-thrust-density double-layer fractional slot winding cylindrical linear Download PDFInfo
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- CN108683319A CN108683319A CN201810553633.3A CN201810553633A CN108683319A CN 108683319 A CN108683319 A CN 108683319A CN 201810553633 A CN201810553633 A CN 201810553633A CN 108683319 A CN108683319 A CN 108683319A
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- 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
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- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- Chemical & Material Sciences (AREA)
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- Linear Motors (AREA)
Abstract
The present invention proposes a kind of low-speed high-thrust-density double-layer fractional slot winding cylindrical linear, belongs to techniques of linear motor field.Including electric motor primary, motor secondary, primary iron core, air gap, primary wire casing, primary half wire casing, primary teeth, primary edge end tooth, primary yoke, pie winding, permanent magnet, magnetic guiding loop etc..Using double-layer fractional slot winding construction, motor pole span is reduced, working frequency is effectively improved, to improve electric efficiency, and makes motor that there is certain speed adjustable range.It is smaller than primary teeth that side end well width is set as the normally half of primary slot, the thickness of primary edge end tooth, the effective length of electric motor primary is equal to (n+1/2) × τ simultaneously, apparent inhibition is generated to motor force oscillation, the detent force for reducing motor, keeps motor operation more reliable and more stable.Have many advantages, such as that simple in structure, cost is relatively low, ultrahigh in efficiency, larger speed adjustable range, pushing force density are big, stable and reliable operation, is very suitable for low speed, high thrust occasion.
Description
Technical field
The present invention relates to a kind of cylindrical linear, especially a kind of low-speed high-thrust-density double-layer fractional slot winding circle
Tubular linear motor.Belong to techniques of linear motor field.
Background technology
Linear motor is a kind of electric energy to be directly changed into linear motion mechanical energy without passing through intermediate any converting means
The motor set can save intermediate conversion mechanism compared with the electric rotating machine kind of drive, reduce equipment occupation space, improve
System effectiveness.As a kind of structure type of linear motor, cylindrical linear has more superiority：High operational efficiency, Gao Gong
Rate and force density, good servo performance, closed structure.But for the occasion of low speed, high pushing force density, cylindrical linear electricity
Machine needs lower synchronizing speed, and simplex winding magneto pole span is generally large, therefore working frequency is too low, and then makes the effect of motor
Rate is low.
Therefore for the occasion of low speed, high pushing force density, using double-layer fractional slot winding technique, in certain synchronizing speed
Under the conditions of, it reduces pole span and can effectively improve frequency, to improve electric efficiency, increase motor pushing force density, while can also press down
The force oscillation of linear motor processed, and make motor that there is certain speed adjustable range.So double winding fractional-slot winding technology is answered
For in the design of cylinder permanent magnetic line motor, and it is stability to cylindrical linear to design suitable pole slot fit system
It can optimize and be of great significance.
Currently, there are some relevant researchs and technology in the field for low-speed high-thrust-density linear motor, such as China is special
Sharp " low-speed high-thrust-density linear motor "（Application number：201110443116.9）, it is proposed that " a kind of novel magnetic field modulation system is forever
Magnetic directly drives linear motor, by the magnetic field adjustable magnetic effect of stator tooth in motor, realizes contactless gear, while increasing on stator
Permanent magnet is added, has improved air gap flux density, reduced leakage field ".But the motor uses simplex winding structure, therefore its pole span is larger, adjusts
Fast range is smaller；When motor is operated in low speed occasion, working frequency is too low, and then makes the inefficiency of motor, cannot meet
The high requirement of low speed, pushing force density.A kind of for another example Chinese patent " high-thrust permanent magnet direct drive linear electric motor " application number
（201110028079.5）, the invention " using the special structure of motor, the air-gap reluctance distribution of modulating motor, when motor operation,
The movement velocity of permanent magnet flux realizes the effect of raising speed at double in the movement velocity of motor secondary in electric motor primary ", it is suitable for low
Fast straight drive application scenario, which includes flat, bilateral flat-plat type and cylinder mode.But the machine winding is collection
In or distributed winding, distributed winding can not be applied in cylinder mode, tubular electrical machines are difficult to envision according to it
Suitable for low-speed direct driving application scenario.
Invention content
It is an object of the invention to overcome the above-mentioned prior art, a kind of low-speed high-thrust-density bilayer score is provided
Slot winding cylindrical linear, solve existing cylinder permanent magnetic line motor low speed, high pushing force density occasion under, effect
The problem that rate is low, speed adjustable range is small, pushing force density is small.Inhibit the force oscillation of linear motor simultaneously, and it is certain so that motor is had
Speed adjustable range.Have many advantages, such as that simple in structure, cost is relatively low, efficiency is big compared with high, larger speed adjustable range, pushing force density, ten
Divide suitable for low speed, high thrust occasion.
The technical solution adopted by the present invention to solve the technical problems is：
The cylindrical linear of the low-speed high-thrust-density Double Layer Winding, including electric motor primary（1）, motor secondary（2）.
Electric motor primary（1）Including primary wire casing（101）, primary half wire casing（102）, primary teeth（103）, primary edge end tooth
（104）, primary yoke（105）And pie winding（106）.Electric motor primary（1）The slot at both ends is primary half wire casing（102）, remaining slot
For primary wire casing（101）.Half wire casing of primary at both ends（102）It is internal respectively to place one group of pie winding（106）；Primary wire casing
（101）Internal two groups of independent pie windings placed side by side（106）；Two neighboring primary wire casing（101）By primary teeth（102）Every
It opens, electric motor primary（1）Half wire casing of primary of two ends（102）Outside be primary edge end tooth（104）；Primary wire casing（101）、
Primary half wire casing（102）, primary teeth（103）, primary edge end tooth（104）With primary yoke（105）Collectively form primary iron core（3）.
Motor secondary（2）Including permanent magnet（201）, magnetic guiding loop（202）, secondary iron core（203）.Electric motor primary（1）It is fixed
It is motionless, motor secondary（2）Linear reciprocating motion is done along motor movement direction.Permanent magnet（201）, magnetic guiding loop（202）For cylinder
Type structure, and thickness is identical；Permanent magnet（201）, magnetic guiding loop（202）Along secondary iron core（203）Axis direction is arranged in order, nested
In secondary iron core（203）Outer surface.
Electric motor primary（1）Internal diameter is more than motor secondary（2）Outer diameter, electric motor primary（1）And motor secondary（2）Equipped with air gap
（4）.
Further, primary wire casing（101）With primary half wire casing（102）The sum of slot number and corresponding permanent magnet（201）Pole
Number is identical.Due to primary half wire casing（102）Groove width be primary wire casing（101）Half, therefore primary wire casing（101）With primary half
Wire casing（102）The sum of slot number and the difference of the effective slot number of motor be 1.Each the extremely lower number per mutually arrangement slot number is score, is belonged to
In fractional-slot winding.
Further, electric motor primary（1）Primary teeth（103）Thickness and primary edge end tooth（104）Difference, primary teeth
（103）Thickness is compared with side end primary teeth（104）Thickness, about 1/3 tooth pitch.To electric motor primary（1）Primary edge end tooth（104）It is cut
Tooth, can be obviously reduced the Slot force of linear motor, while inhibit force oscillation.
Further, if number of poles is n, pole span τ, electric motor primary（1）Effective length be equal to (n+1/2) × τ.Work as motor
It is primary（1）Effective length be equal to (n+1/2) × τ, the End Force of linear motor is minimum.
Further, the coils arrangement mode of the tubular electrical machines is A+, A-A-, A+A+, A-A-, A+A+, A-B+, B-
B-, B+B+, B-B-, B+B+, B-C+, C-C-, C+C+, C-C-, C+C+, C-.Side end winding A+ and the places side end winding C- slot are
Primary half wire casing（102）, slot where remaining winding is primary wire casing（101）.
Further, permanent magnet（201）Magnetizing direction and secondary iron core（203）Axis direction is parallel.
Further, more series operations of the cylindrical linear, to increase in the case where other performances are constant
Big thrust output.
Compared with prior art, the invention has the advantages that：
1, using double-layer fractional slot winding construction, permanent magnet pole is reduced away from effectively improving working frequency, solve existing cylinder type
Permanent-magnetism linear motor low speed, high pushing force density occasion under, efficiency is low, speed adjustable range is small, pushing force density is small problem.And make
Motor has certain speed adjustable range.Have many advantages, such as that simple in structure, cost is relatively low, is very suitable for low speed, high thrust occasion.
2, double-layer fractional slot winding cylindrical linear side end well width is set as to half, the primary edge of normal primary slot
The thickness of end tooth is smaller than primary teeth, while the effective length of electric motor primary is equal to (n+1/2) × τ, this pole slot fit system pair
Motor force oscillation generates apparent inhibition, while reducing the detent force of motor, keeps motor operation more reliable and more stable.
Description of the drawings
Fig. 1：Double-layer fractional slot winding cylindrical linear structure chart.
Fig. 2：Two kinds of structural electromotor efficiency comparative figures under different frequency.
Fig. 3：Two kinds of structural electromotor thrust comparison diagrams under different frequency.
Fig. 4：Two kinds of structural electromotor force oscillation percentage comparison diagrams under different frequency.
In figure：1-electric motor primary, 2-motor secondaries, 3-primary iron cores, 4-air gaps, 101-primary wire casings, 102-
Primary half wire casing, 103-primary teeths, 104-primary edge end teeth, 105-primary yokes, 106-pie windings, 201-permanent magnets,
202-magnetic guiding loops, 203-secondary iron cores.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings：
The cylindrical linear of low-speed high-thrust-density Double Layer Winding is as shown in Figure 1, include electric motor primary（1）, motor secondary
（2）.
Electric motor primary（1）Including primary wire casing（101）, primary half wire casing（102）, primary teeth（103）, primary edge end tooth
（104）, primary yoke（105）And pie winding（106）.Electric motor primary（1）The slot at both ends is primary half wire casing（102）, remaining slot
For primary wire casing（101）；Half wire casing of primary at both ends（102）It is internal respectively to place one group of pie winding（106）；Primary wire casing
（101）Internal two groups of independent pie windings placed side by side（106）；Two neighboring primary wire casing（101）By primary teeth（102）Every
It opens, electric motor primary（1）Half wire casing of primary of two ends（102）Outside be primary edge end tooth（104）；Primary wire casing（101）、
Primary half wire casing（102）, primary teeth（103）, primary edge end tooth（104）With primary yoke（105）Collectively form primary iron core（3）.
Motor secondary（2）Including permanent magnet（201）, magnetic guiding loop（202）, secondary iron core（203）.Electric motor primary（1）It is fixed
It is motionless, motor secondary（2）Linear reciprocating motion is done along motor movement direction.Permanent magnet（201）Magnetizing direction and secondary iron core
（203）Axis direction is parallel；Permanent magnet（201）, magnetic guiding loop（202）For cylinder type, and thickness is identical；Permanent magnet（201）、
Magnetic guiding loop（202）Along secondary iron core（203）Axis direction is arranged in order, and is nested in secondary iron core（203）Outer surface.
Electric motor primary（1）Internal diameter is more than motor secondary（2）Outer diameter, electric motor primary（1）And motor secondary（2）Equipped with air gap
（4）.
Primary wire casing（101）With primary half wire casing（102）The sum of slot number and corresponding permanent magnet（201）Number of poles is identical.By
In primary half wire casing（102）Groove width be primary wire casing（101）Half, therefore primary wire casing（101）With primary half wire casing（102）
The sum of slot number and the difference of the effective slot number of motor be 1.Each the extremely lower number per mutually arrangement slot number is score, belong to fractional-slot around
Group.
Electric motor primary（1）Primary teeth（103）Thickness and primary edge end tooth（104）Difference, primary teeth（103）Thickness is compared with side
Hold primary teeth（104）Thick 1/3 tooth pitch.To electric motor primary（1）Primary edge end tooth（104）It carries out cutting tooth, straight line can be obviously reduced
The Slot force of motor, while inhibiting force oscillation.
If number of poles is n, pole span τ, electric motor primary（1）Effective length be equal to (n+1/2) × τ.Work as electric motor primary（1）'s
Effective length is equal to (n+1/2) × τ, and the End Force of linear motor is minimum.
The coils arrangement mode of the tubular electrical machines be A+, A-A-, A+A+, A-A-, A+A+, A-B+, B-B-, B+B+,
B-B-, B+B+, B-C+, C-C-, C+C+, C-C-, C+C+, C-.Slot where side end winding A+ and side end winding C- is primary half line
Slot（102）, slot where remaining winding is primary wire casing（101）.
Key parameter under the same conditions, single-layered fractional slot winding cylinder permanent magnetic line motor and double-layer fractional slot around
Group thrust performance is compared.When simplex winding motor adds driving source, the thrust of simplex winding motor is in 6.95kN or so, minimum force
For 6.25kN, maximum, force 7.65kN, force oscillation 20.14%；When double-winding motor plus driving source, double-winding motor
Thrust is in 9.61kN or so, minimum force 9.29kN, maximum, force 9.93kN, force oscillation 7.3%.Obviously, single-layered fractional slot
The condition of winding construction motor and double-layer fractional slot structural electromotor in same nominal power 7.5KW, identical synchronizing speed 0.45m/s
Under, the motor thrust size and force oscillation percentage of double-layer fractional slot winding are all much better than the motor of single-layered fractional slot winding.
Key parameter under the same conditions, only change working frequency（That is the synchronizing speed of motor is different）, single layer score
Slot winding cylinder permanent magnetic line motor is compared with double-layer fractional slot winding steady-state behaviour, as shown in Figure 2,3, 4.
It can be seen from Fig. 2,3 linear motor working frequency in 30Hz hereinafter, the double winding cylinder type using fractional-slot is straight
Line motor is much better than simplex winding structural electromotor in efficiency and pushing force density.But linear motor working frequency near 30Hz when,
It is similar to simplex winding structural electromotor efficiency and pushing force density performance using the double winding cylindrical linear of fractional-slot.But straight line
When motor working frequency is more than 30Hz, slightly it is better than in efficiency and pushing force density using the double winding cylindrical linear of fractional-slot
Simplex winding structural electromotor.As seen from Figure 4, linear motor is operated under any frequency, the force oscillation hundred of double-winding motor
Ratio is divided to be much better than simplex winding structural electromotor.Therefore using the double winding cylindrical linear of fractional-slot for improving motor thrust
Density inhibits linear motor pushing force fluctuation, promotes electric efficiency, and the stability for improving permanent-magnetism linear motor is of great significance,
The structure cylindrical linear is very suitable for low speed, high thrust occasion.
The foregoing is merely the preferable embodiments of the present invention, are not intended to limit the invention, all spirit in the present invention
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear, it is characterised in that：Including electric motor primary（1）、
Motor secondary（2）；
Electric motor primary（1）Including primary wire casing（101）, primary half wire casing（102）, primary teeth（103）, primary edge end tooth（104）、
Primary yoke（105）And pie winding（106）；
Electric motor primary（1）The slot at both ends is primary half wire casing（102）, remaining slot is primary wire casing（101）；
Half wire casing of primary at both ends（102）It is internal respectively to place one group of pie winding（106）；Primary wire casing（101）It simultaneously discharges inside
Set two groups of independent pie windings（106）；Two neighboring primary wire casing（101）By primary teeth（102）It separates, electric motor primary（1）
Half wire casing of primary of two ends（102）Outside be primary edge end tooth（104）；Primary wire casing（101）, primary half wire casing
（102）, primary teeth（103）, primary edge end tooth（104）With primary yoke（105）Collectively form primary iron core（3）；
Motor secondary（2）Including permanent magnet（201）, magnetic guiding loop（202）, secondary iron core（203）；
Permanent magnet（201）, magnetic guiding loop（202）For cylinder type, and thickness is identical；Permanent magnet（201）, magnetic guiding loop（202）Edge
Secondary iron core（203）Axis direction is arranged in order, and is nested in secondary iron core（203）Outer surface；
Electric motor primary（1）Internal diameter is more than motor secondary（2）Outer diameter, electric motor primary（1）And motor secondary（2）Equipped with air gap（4）；
Electric motor primary（1）It is fixed, motor secondary（2）Linear reciprocating motion is done along motor movement direction.
2. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear according to claim 1, feature exist
In：Primary wire casing（101）With primary half wire casing（102）The sum of slot number and corresponding permanent magnet（201）Number of poles is identical；Each extremely under
Number per mutually arrangement slot number is score, belongs to fractional-slot winding, and the difference of number of poles and effective slot number is 1.
3. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear according to claim 1, feature exist
In：Electric motor primary（1）Primary teeth（103）Thickness and primary edge end tooth（104）Difference, primary teeth（103）Compared with primary edge end tooth
（104）It is thick.
4. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear according to claim 1, feature exist
In：If number of poles is n, pole span τ, electric motor primary（1）Effective length be equal to (n+1/2) × τ.
5. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear according to claim 1, feature exist
In：Coils arrangement mode A+, A-A-, A+A+, A-A-, A+A+, A-B+, B-B-, B+B+, B-B-, B+B+, B-C+, C-C-, C+C
+, C-C-, C+C+, C-.
6. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear according to claim 1, feature exist
In：Permanent magnet（201）Magnetizing direction and secondary iron core（203）Axis direction is parallel.
7. low-speed high-thrust-density double-layer fractional slot winding cylindrical linear according to claim 1, feature exist
In：More series operations of the cylindrical linear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810553633.3A CN108683319B (en) | 2018-06-01 | 2018-06-01 | Low-speed high-thrust-density cylindrical linear motor with double-layer fractional slot windings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810553633.3A CN108683319B (en) | 2018-06-01 | 2018-06-01 | Low-speed high-thrust-density cylindrical linear motor with double-layer fractional slot windings |
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|---|---|
| CN108683319A true CN108683319A (en) | 2018-10-19 |
| CN108683319B CN108683319B (en) | 2020-12-11 |
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|---|---|---|---|
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Cited By (2)
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| CN109861494A (en) * | 2019-04-12 | 2019-06-07 | 河南理工大学 | A kind of low Slot force permanent-magnetism linear motor of combined type and its implementation |
| CN112202312A (en) * | 2020-09-30 | 2021-01-08 | 中车株洲电机有限公司 | Linear induction motor and motor primary thereof |
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| CN108683319B (en) | 2020-12-11 |
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