CN1799180A - Ironcore linear brushless DC motor with reduced detent force - Google Patents
Ironcore linear brushless DC motor with reduced detent force Download PDFInfo
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- CN1799180A CN1799180A CNA2004800154767A CN200480015476A CN1799180A CN 1799180 A CN1799180 A CN 1799180A CN A2004800154767 A CNA2004800154767 A CN A2004800154767A CN 200480015476 A CN200480015476 A CN 200480015476A CN 1799180 A CN1799180 A CN 1799180A
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- 238000004804 winding Methods 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000003475 lamination Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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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
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
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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
-
- 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
- H02K41/035—DC motors; Unipolar motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- 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
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Linear Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
本发明公开了一种直线无刷直流电机，该电机由于叠层组件(150)而具有减小的定位力，该叠层组件(150)的特征是形成为楔形的端齿(152，154)，该叠层组件沿运动方向的长度大约等于(Np+1/2)×极距，其中Np为被无刷直流电机的电枢所覆盖的磁极数量，而极距为直线无刷直流电机的场组件(162)中极性相反的两相邻磁体(164)的中心距。
The present invention discloses a linear brushless DC motor having reduced positioning force due to a laminate assembly (150) featuring end teeth (152, 154) formed as wedges , the length of the laminated assembly along the direction of motion is approximately equal to (N p +1/2) × pole pitch, where N p is the number of magnetic poles covered by the armature of the brushless DC motor, and the pole pitch is the linear brushless DC The center-to-center distance of two adjacent magnets (164) of opposite polarity in the field assembly (162) of the motor.
Description
Related application
The application requires the priority of the provisional application submitted on June 6th, 2003 number 60/476,741 according to 35U.S.C. § 119 (e).
This application is U.S. Patent application No.10/116,495 part continuation application, this patent application No.10/116,495 assignees that submit to and transferred the application on April 3rd, 2002, and this patent application No.10/116,495 require the priority of the provisional application submitted to April 9 calendar year 2001 number 60/282,546.
Technical field
The application relates generally to linear brushless DC motor, relates in particular to the linear brushless DC motor unshakable in one's determination that detent force (detentforce) reduces.
Background technology
The typical linear brushless motor of rectangular configuration mainly comprises two parts: armature assembly and field assembly, they separate by less air gap each other.
Armature assembly comprises the stacked wafer module of being made up of lamination 10 again, is provided with three phase windings in the slit 12 of this stacked wafer module 10.This stacked wafer module 10 is shown in Figure 1.Field assembly is the rectangle soft magnet plate, and the rectangular magnet of alternating polarity is towards air gap.
The slotted opening 14 of armature assembly is selected as far as possible for a short time usually, thereby makes detent force (cogging force) minimum.Fig. 2 shows typical slotted opening 14.Yet little slotted opening has limited the size of the electric wire that can be used for winding.In addition, slotted opening 14 becomes more little, and it is difficult more that then any machine winding technology also all will become.
In addition, for armature assembly being connected to a mechanical structure, the end face 16 of stacked wafer module 10 should have by hole that get out and screwed.Because lamination is not suitable for such hole, thus the locking wedge 18 that has installing hole be provided with, as shown in Figure 1.In case stamp out groove 20 for these locking wedges 18 on lamination, the distance between the locking wedge 18 just is fixed so, and if do not change the stamping machine that is used for this lamination, just can not change the distance between the locking wedge 18.
On April 3rd, 2002, assignee's that submit to and that transfer the application U.S. Patent application No.10/116495 solved these defectives of existing armature assembly design by a kind of armature assembly design is provided, the winding of coil is convenient in this design, also make simultaneously the detent force minimum, wherein also disclose an installing rack structure, made armature assembly become simple and flexible to the connection of mechanical structure by this installing rack.
Yet still need a kind of armature design, it can provide the detent force that reduces, and this detent force causes by magnetic resistance change rate, causes and the variation of magnetic resistance is a finite length by stacked wafer module.
Summary of the invention
Stack configuration of the present invention and the linear brushless DC motor that includes this stack configuration provide above-mentioned and other desirable feature, the shaping of the end tooth by stacked wafer module, can fully reduce detent force, here this end tooth is preferably shaped to wedge shape.
A kind of stacked wafer module design is provided in one embodiment, and this stacked wafer module is applied to comprise in the armature assembly of a plurality of windings that wherein this stacked wafer module comprises base portion and a plurality of teeth that extend from base portion, and described winding can be around described a plurality of teeth location; Wherein said a plurality of tooth is to each other with pre-constant pitch t
tSpaced apart, and comprise first end tooth and second end tooth, first end tooth is positioned at an end of stacked wafer module along the direction of motion, and second end tooth is positioned at the other end of stacked wafer module along the direction of motion; Wherein first end tooth and second end tooth are wedge shape; And wherein stacked wafer module has identical length along the direction of motion, and this length approximates the non-integral multiple of number of magnetic poles below the armature greatly, and for example this length is (N
p+ 1/2) * t
p, N wherein
pBe the number of magnetic poles below the stacked wafer module, t
pCentre-to-centre spacing for two opposite adjacent magnets of field assembly Semi-polarity.Preferably, t
tBe slightly less than t
p, t for example
tWith t
pRatio be 7: 8.
In one embodiment of this invention, end tooth is along the direction of motion and be parallel in the plane of base portion and have right triangular cross-sectional, and its width is zero in this vertex of a triangle substantially, and has Breadth Maximum W along this leg-of-mutton base
Max
In a preferred embodiment of the invention, W
MaxApproximate t greatly
pAnd the area of the right triangular cross-sectional of end tooth approximates the area of section of the internal tooth of stacked wafer module greatly.
According to detailed description and drawings, these and other characteristic of the present invention and advantage be easy to understand more.
Brief description of drawings
Fig. 1 is the diagram of the exemplary stack assembly of prior art.
Fig. 2 is the part diagram of the exemplary stack assembly of prior art.
Fig. 3 is a kind of part diagram of stack configuration, and this stacked wafer module is convenient to the coil winding and has also been reduced detent force simultaneously.
Fig. 4 is a kind of part diagram of stacked wafer module, and slotted opening wherein shown in Figure 3 is plugged according to a kind of structure, and this structure is convenient to the coil winding and has also been reduced detent force simultaneously.
Fig. 5 A and Fig. 5 B show according to a kind of part of the stacked wafer module that comprises installing rack of structure diagram, and the syndeton simply and flexibly that this structure provides also shows the wedge among Fig. 4 embodiment simultaneously.
Fig. 6 is the enlarged drawing of the part of tooth in the stacked wafer module in a kind of structure and wedge, and this structure is convenient to coil and is twined and also reduced detent force simultaneously.
Fig. 7 is the perspective view of stacked wafer module according to an embodiment of the invention.
Fig. 8 is the plane graph of stacked wafer module shown in Figure 7.
Fig. 9 is a perspective view of using the armature assembly of stacked wafer module shown in Figure 7.
Figure 10 is according to the preferred embodiment of the present invention, the diagram of the preference relation between the size of the magnet of stacked wafer module and field assembly.
Figure 11 A, 11B and 11C be according to the preferred embodiment of the invention stacked wafer module with respect to the diagram of three positions of field assembly.
The detailed description of disclosed embodiment
On April 3rd, 2002, U.S. Patent application No.10/116495 that submit and that transfer present assignee here was incorporated herein by reference.
With reference now to Fig. 3,, show an a kind of part of stacked wafer module 100 of structure, this structure is convenient to the coil winding and has been reduced detent force simultaneously.As shown in the figure, the tooth 102 of stacked wafer module stretches out from base portion 106.Be used for the width of slit 104 of spaced apart teeth 102 from the bottom (base portion 106) 108 (free ends of tooth) are substantially the same to the top.This toothing with existing stacked wafer module is different, and for example the top of tooth expands outwardly so that the slotted opening 14 between the tooth narrows down in Fig. 2.
According to present embodiment, the top 108 of each tooth 102 has two extra recesses 110, as shown in Figure 3; Recess 110 is used for holding magnetic wedge 112, as shown in Figure 4.The purpose of these magnetic wedges 112 is to make along the difference minimum of the air-gap reluctance of the center line 116 of the center line 114 of tooth 102 and slit 104.This difference is more little, and detent force is just more little.
According in the further embodiment of this invention shown in Fig. 5 A and the 5B, make up armature assembly and comprise: the stacked wafer module 100 that has the winding (not shown); Be arranged in the magnetic wedge 112 of slit 104; And the installing rack of making by soft magnetic material 120.Preferably, installing rack 120 is along the size of the y direction of stacked wafer module 100 size greater than stacked wafer module 100, and its thickness is preferably more than the thickness of the base portion 106 of stacked wafer module 100.Shown in Fig. 5 A, also be preferably more than the width dimensions of stacked wafer module transverse to the width dimensions of the longitudinal axis of stacked wafer module 100.Preferred employing dovetail structure provides the accurate assembling between stacked wafer module 100 and the installing rack 120.
This preferred dovetail structure further illustrates in Fig. 5 B.End at stacked wafer module 100 can see that base portion 106 has a surface outward-dipping towards the direction of the outer surface of base portion 106.Can also see that the end of installing rack 120 has the part 122 and 124 of extending downwards on the direction of tooth 102, its inner surface has the shape that matches with the end of base portion 106.Especially, part 122 and 124 inner surface be to intramedullary expansion, makes the end that part 122 and 124 locking base portions 106 expand outwardly.Though disclose the dovetail structure, should be appreciated that within the spirit of disclosed embodiment also available other structure is positioned at installing rack 120 on the base portion 106 of stacked wafer module 100 as preferred structure.
In the embodiment shown in Fig. 5 A and Fig. 5 B, owing to all parts that are not break iron (base portion 106 and installing rack 120) all are layerings, so the solid section of break iron (installing rack 120) will have extra eddy current losses.Yet, because the cross section of the solid section of break iron is greater than the cross section (Fig. 5 B) of layered portion, so the flux density in the solid section of break iron is relatively low.Therefore, with (flux density)
2Proportional additional eddy current losses also can be lower.
Under the structure of the installing rack of disclosed embodiment, need not change lamination punch for the change that adapts to distance between the installing hole, and, can be by changing the structure that single installing rack changes installing hole, and unlike prior art, need change a plurality of wedges.
Fig. 6 be solid or stratiform magnetic wedge 112 and recess 110 between the expanded view of relation, they are formed on the top 108 of tooth 102 of armature stacked wafer module 100 of the disclosure embodiment.Preferred employing dovetail structure is so that accurately cooperate between tooth 102 and the wedge 112.As shown in Figure 6, wedge 112 has trapezoidal cross section, inwards towards the length on the wedge surface 126 of winding (not shown) greater than length away from winding surface outwardly.Top 108 at each tooth 102 cuts out recess 110, and its shape matches with the size of wedge 112, so that realize that between recess 110 and wedge 112 dovetail cooperates.Should be noted that for the embodiment among Fig. 6 when being placed in wedge 112 in the recess 110, the size of wedge 112 makes it flush basically with the outward surface of tooth 102 away from winding surface outwardly.
Though disclose dovetail structure, should be appreciated that within the spirit of the disclosure embodiment also available other structure is locating wedge 112 between contiguous tooth 102 as preferred structure.
Though top embodiment has improved performance, but still need reduce by the caused detent force of magnetic resistance change rate, this magnetic resistance change rate is that the finite length by stacked wafer module causes.
With reference now to Fig. 7,8,9,10,11A, 11B and 11C,, one embodiment of the invention are disclosed, this embodiment provides a kind of linear brushless DC motor unshakable in one's determination that reduces detent force.Especially, this embodiment has such feature, thereby promptly is configured as the detent force that wedge shape fully reduces linear electric motors by the end tooth 152 and 154 with stacked wafer module 150.In the preferred structure of this embodiment, end tooth can have right triangular cross-sectional in the plane that is parallel to installing rack 156, the hypotenuse in this cross section from the end of stacked wafer module 150 outwards towards.Wedge shape end tooth 152 and 154 Breadth Maximum W along the direction of motion
MaxApproximate the centre-to-centre spacing t between magnet 164 (Figure 10) greatly
pAnd, wedge shape end tooth 152 and 154 minimum widith W along the direction of motion
MinSubstantially be zero (Fig. 8).It will be noted that also each wedge shape end tooth 152 and 154 extends outwardly beyond for example about W of installing rack 156 on the Breadth Maximum this point
Max/ 3.
Another of embodiment shown in Fig. 7,8,9,10,11A, 11B and the 11C be characterised in that, wedge shape end tooth 152 and 154 outer surface do not extend to entire depth as the surface of internal tooth 158.As can be seen from Figure 7, having thickness is that the step 160 of x is between the outer surface of installing rack and wedge shape end tooth 152 and 154.
Fig. 9 shows a kind of armature assembly, and it comprises the stacked wafer module 150 shown in Fig. 7 and 8.It illustrates every an internal tooth 158 and all is surrounded with winding 153. End frame 155 and 157 also is shown has been fixed to the end of installing rack 156, lay respectively at wedge shape end tooth 152 and 154 below.Can see that installing rack 156 has the dovetail type syndeton in its end and inside.It is more detailed that the inclined-plane of the dovetail type structures at place, installing rack 156 ends can be seen in Fig. 7.
As shown in figure 10, preferably, stacked wafer module 150 keeps constant along the total length of the direction of motion, and can equal (N
p+ 1/2) * t
pIn this relational expression, N
pBe the number of magnetic poles below the stacked wafer module 150 (for example: 8,10,12 or the like), t
pBe pole span, wherein in the field assembly 162 that uses with stacked wafer module 150, the centre-to-centre spacing of opposite polarity two adjacent magnets 164 is pole span.For example, disclosed among Figure 10 is the interval that is used for the magnet 164 of the stacked wafer module 150 of the linear brushless DC motor unshakable in one's determination that detent force reduces and field assembly 162, wherein pole span t
pBe 16mm, the number of magnetic poles N below the stacked wafer module
pBe 11.In this structure, the length of stacked wafer module 150 is 16 * (11+1/2)=184mm.Utilize this method, stacked wafer module 150 can cover the magnet (being 11.5 in this case) of about equal number, and needn't consider the position of stacked wafer module with respect to field (magnet) assembly.
In the aforementioned embodiment, the width of the internal tooth 158 of stacked wafer module 150 is approximately 8.2mm, the centre-to-centre spacing t between the internal tooth 158
tBe approximately 14mm.And the magnet of field assembly is approximately 14.4mm along the width of the direction of motion.Should be noted that also because the taper of end tooth 152 and 154, stacked wafer module 150 all has identical " length " (along direction of motion) in any point transverse to the direction of motion.This has diagram at top shown in Figure 10, and wherein top, middle part or the bottom along stacked wafer module 150 all has identical size 11.5 * t
p
Disclosed this stacked wafer module 150 is with respect to the principal character of the structure of field assembly 162 magnet of identical (on an average) quantity that has been stack surface " covering ", and magnetic resistance can not change basically as the function of stacked wafer module position.In this embodiment, the quantity of each pole pair slit (tooth) of answering is near 1 (12 slits are to 11 magnetic poles).This means pole span t
pTooth pitch t no better than
tIn traditional stack configuration, having all is that the stack configuration of lamination of straight-tooth can cover an integer pole span (being 11 in this case).On the contrary, the structure of the disclosure embodiment covers and divides several pole spans (being 11.5 in this case).According to embodiment shown in Figure 10, the length of any longitudinal cross-section of stacked wafer module all equals 11.5 pole spans.For the number of teeth relative among this embodiment, as can be seen, comprise that the number of teeth of the stacked wafer module of end tooth equals N with number of magnetic poles
p+ 1.
Figure 11 A, 11B, 11C illustrate three positions of stacked wafer module 150 with respect to field (magnet) assembly 162, shown that stack surface all is identical on each position for " covering " of magnet 164.Like this, for example in Figure 11 A, can see that the shade of stacked wafer module 150 all approximately covers 11.5 magnets 164 with respect to field assembly 162 along the direction of motion on any longitudinal cross-section.At the top of Figure 11 A, the left side of the shade of stacked wafer module 150 starts from the center of magnet 164, and (direction of motion) extends on 11 entire magnets to the right.The middle part of shade starts from the left side edge of a magnet, and extends on ten magnets and one-half additional magnet to the right.Can see that from Figure 11 A, 11B, 11C for illustrated embodiment, the length on the wedge shape end tooth 152 of stacked wafer module 150 and 154 base approximates pole span t greatly
pAlso as can be seen in this illustrated embodiment, tooth pitch t
tLess than t
pBut greater than 0.75t at least
pShown in Figure 11 A, 11B, the 11C another is characterised in that: in the scope of linear brushless DC motor motion, with respect to magnet 164 diverse locations, have at least a magnet to be covered by tooth no more than in the stacked wafer module for stacked wafer module 150.
In theory, under the situation that does not have fringing flux, will be zero by stacked wafer module in the detent force that finite length caused of the direction of motion, thereby can eliminate detent force.In practice, detent force reduces greatly, almost is suppressed, and has found that motion is very level and smooth.
The term that adopt in this place and only express the purpose unrestricted for explanation, and, be not intended to use these terms and express the equivalent of getting rid of shown and described part or all of feature, will be appreciated that in the scope of disclosed embodiment, to have multiple variation.
Claims (29)
1. armature assembly comprises:
A plurality of windings;
Base portion;
From the extended a plurality of teeth of described base portion, described winding can be around described a plurality of teeth location; Wherein, described a plurality of teeth are spaced apart from each other, so that limit slotted opening between adjacent teeth and at the place, end of adjacent teeth; Described a plurality of tooth comprises first end tooth and second end tooth, and first end tooth is positioned at an end of stacked wafer module along the direction of motion, and second end tooth is positioned at the other end of stacked wafer module along the direction of motion; With
Wherein, first end tooth and second end tooth are formed the shape with wedge shape.
2. armature assembly according to claim 1, wherein, all some extends outwardly beyond described base portion along the direction of motion to each in first end tooth and second end tooth.
3. armature assembly according to claim 1, wherein, described armature approximates (N greatly along the length of the direction of motion
p+ 1/2) * pole span, wherein N
pBe the number of magnetic poles below this armature, pole span is the centre-to-centre spacing of two opposite adjacent magnets of field assembly Semi-polarity.
4. stacked wafer module that is used in the armature assembly, this armature assembly comprises a plurality of windings, wherein, this stacked wafer module comprises:
Base portion;
From the extended a plurality of teeth of described base portion, described winding can be around described a plurality of teeth location; Wherein, described a plurality of tooth is to each other with pre-constant pitch t
tSpaced apart; Described a plurality of tooth comprises first end tooth and second end tooth, and first end tooth is positioned at an end of stacked wafer module along the direction of motion, and second end tooth is positioned at the other end of stacked wafer module along the direction of motion; With
Wherein, first end tooth and second end tooth are formed wedge shape; And wherein, this stacked wafer module has identical length along the direction of motion, and this length approximates (N greatly
p+ 1/2) * t
p, N wherein
pBe the number of magnetic poles below the armature, t
pCentre-to-centre spacing for two opposite adjacent magnets of field assembly Semi-polarity.
5. stacked wafer module according to claim 4, wherein t
pApproximate t greatly
t
6. stacked wafer module according to claim 4, wherein t
p, t
tAnd the size of stacked wafer module length is confirmed as making that several magnets of branch in the field assembly are covered by the pole span of stacked wafer module.
7. linear brushless DC motor comprises:
Field assembly, it comprises the magnet of a plurality of alternating polarities, thus these magnets define a plurality of magnetic poles along direction of motion location; With
Armature assembly, it comprises stacked wafer module and a plurality of winding, wherein this stacked wafer module comprises:
Base portion;
From the extended a plurality of teeth of described base portion, described winding can be around described a plurality of teeth location; Described a plurality of tooth comprises first end tooth and second end tooth, and first end tooth is positioned at an end of stacked wafer module along the direction of motion, and second end tooth is positioned at the other end of stacked wafer module along the direction of motion; With
Wherein, first end tooth and second end tooth are formed wedge shape; And wherein, this stacked wafer module has identical length along the direction of motion, and this length approximates (N greatly
p+ 1/2) * t
p, N wherein
pBe the number of magnetic poles below the armature, t
pCentre-to-centre spacing for two opposite adjacent magnets of field assembly Semi-polarity.
8. linear brushless DC motor according to claim 7, wherein, described a plurality of teeth are to each other with pre-constant pitch t
tSpaced apart, t
tLess than t
p
9. linear brushless DC motor according to claim 8, wherein, t
tAnd t
pBe selected to like this, promptly in the range of movement of motor, the area of a plurality of magnets that this stacked wafer module covers is identical basically.
10. linear brushless DC motor according to claim 8, wherein, t
tAnd t
pBe selected to like this, promptly in the motor movement scope on any one position, at least one magnet in a plurality of magnets is covered by no more than one tooth in described a plurality of teeth.
11. linear brushless DC motor according to claim 8, wherein, first end tooth and second end tooth have the cross section that is shaped as right-angled triangle in being parallel to the plane of base portion, this right-angled triangle has the base and the summit relative with this base that is parallel to the direction of motion, and wherein the length on this base equals t substantially
p
12. linear brushless DC motor according to claim 11, wherein, except first end tooth and second end tooth, the area of section that described a plurality of teeth are had in being parallel to the plane of base portion is substantially equal to the area of section of first and second end teeth.
13. linear brushless DC motor according to claim 8, wherein, the cross-sectional width of the internal tooth of stacked wafer module is approximately t
pHalf, the cross-sectional width of described a plurality of magnets approximates greatly but greater than t
t
14. linear brushless DC motor according to claim 7, wherein, stacked wafer module has N
p+ 1 tooth.
15. linear brushless DC motor according to claim 7, wherein, described a plurality of tooth comprises transverse to the direction of motion and has the parallel surface of predetermined altitude, and wherein, at least one face of first end tooth and second end tooth and the direction of motion is angled and its height less than the predetermined altitude of described parallel surface.
16. linear brushless DC motor according to claim 15 comprises that also thickness is the step of X, extend along the direction of motion bottom of this step each end tooth from first end tooth and second end tooth.
17. linear brushless DC motor according to claim 7, also comprise the integral type installing rack, this installing rack has extended the length of stacked wafer module substantially along the direction of motion, and utilize dovetail type structures that this installing rack is connected on the stacked wafer module, and wherein this integral type installing rack is suitable for holding the installing hole that is used for linear brushless DC motor.
18. linear brushless DC motor according to claim 8, wherein t
tWith t
pRatio be 7: 8.
19. armature assembly according to claim 1, described a plurality of teeth are to each other with pre-constant pitch t
tSpaced apart, this tooth pitch t
tLess than a pole span, wherein this pole span equals the centre-to-centre spacing of two opposite adjacent magnets of field assembly Semi-polarity.
20. armature assembly according to claim 1, wherein, with t
tBe chosen to make that with pole span stacked wafer module covers the area of a plurality of magnets in the field assembly, this area is identical basically in a range of movement, and wherein this pole span equals the centre-to-centre spacing of two opposite adjacent magnets of field assembly Semi-polarity.
21. armature assembly according to claim 19, wherein, with t
tBe chosen to make that with pole span on any one position of motor movement scope, at least one magnet in a plurality of magnets is covered by no more than one tooth in described a plurality of teeth.
22. armature assembly according to claim 19, wherein, first end tooth and second end tooth have the cross section that is shaped as right-angled triangle in being parallel to the plane of base portion, this right-angled triangle has the base and the summit relative with this base that is parallel to the direction of motion, and wherein the length on this base equals described pole span substantially.
23. armature assembly according to claim 22, wherein, except first end tooth and second end tooth, the area of section that described a plurality of teeth are had in being parallel to the plane of base portion is substantially equal to the area of section of first and second end teeth.
24. armature assembly according to claim 19, wherein, the cross-sectional width of the internal tooth of stacked wafer module is approximately half of pole span, and the cross-sectional width of described a plurality of magnets approximates greatly but greater than t
t
25. armature assembly according to claim 3, wherein, stacked wafer module has N
p+ 1 tooth.
26. armature assembly according to claim 1, wherein, described a plurality of tooth comprises transverse to the direction of motion and has the parallel surface of predetermined altitude, and wherein, at least one face of first end tooth and second end tooth and the direction of motion is angled and its height less than the predetermined altitude of described parallel surface.
27. armature assembly according to claim 26 comprises that also thickness is the step of X, extend along the direction of motion bottom of this step each end tooth from first end tooth and second end tooth.
28. armature assembly according to claim 1, also comprise the integral type installing rack, this installing rack has extended the length of stacked wafer module substantially along the direction of motion, and utilize dovetail type structures that this installing rack is connected on the stacked wafer module, and wherein this integral type installing rack is suitable for holding the installing hole that is used for linear brushless DC motor.
29. armature assembly according to claim 19, wherein t
tWith the ratio of pole span be 7: 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47674103P | 2003-06-06 | 2003-06-06 | |
| US60/476,741 | 2003-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1799180A true CN1799180A (en) | 2006-07-05 |
Family
ID=33551636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800154767A Pending CN1799180A (en) | 2003-06-06 | 2004-06-02 | Ironcore linear brushless DC motor with reduced detent force |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1634362A1 (en) |
| JP (1) | JP2006527576A (en) |
| KR (1) | KR20060022260A (en) |
| CN (1) | CN1799180A (en) |
| WO (1) | WO2004112224A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214983A (en) * | 2010-04-07 | 2011-10-12 | 株式会社日立制作所 | Linear motor |
| CN104467355A (en) * | 2014-11-26 | 2015-03-25 | 沈阳工业大学 | Low-detent-force fluctuation permanent magnet linear motor of orthorhombic structure lateral teeth |
| CN104779773A (en) * | 2015-03-24 | 2015-07-15 | 沈阳工业大学 | V-shaped low-magnetic-resistance fluctuation type permanent magnet linear motor |
| CN107623427A (en) * | 2016-07-15 | 2018-01-23 | 麦克纳莫绅有限公司 | Transportation system's disc assembly |
| CN110855119A (en) * | 2019-11-11 | 2020-02-28 | 华中科技大学 | A fractional pole two-phase vernier permanent magnet linear motor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005004380B4 (en) * | 2005-01-31 | 2012-02-02 | Siemens Ag | Linear motor with force ripple compensation |
| JP5106833B2 (en) * | 2006-11-15 | 2012-12-26 | ヤマハ発動機株式会社 | Linear motor and single-axis actuator |
| JP5365171B2 (en) * | 2007-11-30 | 2013-12-11 | シンフォニアテクノロジー株式会社 | motor |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447262A (en) * | 1987-08-17 | 1989-02-21 | Shinko Electric Co Ltd | Linear dc brushless motor |
| JPS6447261A (en) * | 1987-08-17 | 1989-02-21 | Shinko Electric Co Ltd | Linear dc brushless motor |
| US5032746A (en) * | 1988-03-22 | 1991-07-16 | Sharp Kabushiki Kaisha | Linear motor with driving device |
| JPH01315250A (en) * | 1988-03-22 | 1989-12-20 | Sharp Corp | Linear motor and linear driving device using the motor |
| DE19528043C1 (en) * | 1995-07-31 | 1996-10-24 | Krauss Maffei Ag | Sync linear motor with primary part and secondary part |
| JPH1047262A (en) * | 1996-07-29 | 1998-02-17 | Mitsubishi Motors Corp | Oil pump and assembling method thereof |
| JPH1047261A (en) * | 1996-07-30 | 1998-02-17 | Toyoda Mach Works Ltd | Vane pump |
| JP3817967B2 (en) * | 1999-05-18 | 2006-09-06 | 株式会社安川電機 | Linear motor |
| JP2002034230A (en) * | 2000-07-18 | 2002-01-31 | Yaskawa Electric Corp | Armature of linear motor |
| ES2177428B1 (en) * | 2000-11-20 | 2004-06-01 | Instituto Cientifico Y Tecnologico De Guipuzcoa, S.A. | LINEAR MOTOR WITH ELIMINATION OF RELUCTANCE FORCES. |
| JP4556229B2 (en) * | 2000-11-21 | 2010-10-06 | 株式会社安川電機 | Coreless linear motor |
| CN1257594C (en) * | 2001-04-09 | 2006-05-24 | Bei传感器及系统有限公司 | Linear brushless dc motor with ironcore composite armature assembly |
-
2004
- 2004-06-02 WO PCT/US2004/017582 patent/WO2004112224A1/en active Application Filing
- 2004-06-02 CN CNA2004800154767A patent/CN1799180A/en active Pending
- 2004-06-02 JP JP2006515155A patent/JP2006527576A/en active Pending
- 2004-06-02 EP EP04754235A patent/EP1634362A1/en not_active Withdrawn
- 2004-06-02 KR KR1020057023406A patent/KR20060022260A/en not_active Application Discontinuation
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214983A (en) * | 2010-04-07 | 2011-10-12 | 株式会社日立制作所 | Linear motor |
| CN102214983B (en) * | 2010-04-07 | 2014-02-12 | 株式会社日立制作所 | Linear motor |
| CN104467355A (en) * | 2014-11-26 | 2015-03-25 | 沈阳工业大学 | Low-detent-force fluctuation permanent magnet linear motor of orthorhombic structure lateral teeth |
| CN104467355B (en) * | 2014-11-26 | 2017-04-12 | 沈阳工业大学 | Low-detent-force fluctuation permanent magnet linear motor of orthorhombic structure lateral teeth |
| CN104779773A (en) * | 2015-03-24 | 2015-07-15 | 沈阳工业大学 | V-shaped low-magnetic-resistance fluctuation type permanent magnet linear motor |
| CN104779773B (en) * | 2015-03-24 | 2017-10-31 | 沈阳工业大学 | A kind of low reluctance force fluctuation permanent magnetic linear electric motors of V types structure |
| CN107623427A (en) * | 2016-07-15 | 2018-01-23 | 麦克纳莫绅有限公司 | Transportation system's disc assembly |
| US10686355B2 (en) | 2016-07-15 | 2020-06-16 | Magnemotion, Inc. | Transport system puck assembly |
| CN107623427B (en) * | 2016-07-15 | 2020-07-14 | 麦克纳莫绅有限公司 | Transport system disc assembly |
| CN110855119A (en) * | 2019-11-11 | 2020-02-28 | 华中科技大学 | A fractional pole two-phase vernier permanent magnet linear motor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1634362A1 (en) | 2006-03-15 |
| WO2004112224A1 (en) | 2004-12-23 |
| KR20060022260A (en) | 2006-03-09 |
| JP2006527576A (en) | 2006-11-30 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20060705 |
