CN101346873A - Magnetic resolver - Google Patents
Magnetic resolver Download PDFInfo
- Publication number
- CN101346873A CN101346873A CNA2006800493708A CN200680049370A CN101346873A CN 101346873 A CN101346873 A CN 101346873A CN A2006800493708 A CNA2006800493708 A CN A2006800493708A CN 200680049370 A CN200680049370 A CN 200680049370A CN 101346873 A CN101346873 A CN 101346873A
- Authority
- CN
- China
- Prior art keywords
- coil
- substrate
- rotor
- core
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 74
- 239000000758 substrate Substances 0.000 claims abstract description 135
- 230000005284 excitation Effects 0.000 claims description 12
- 238000000059 patterning Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 description 16
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 9
- 238000004804 winding Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
A magnetic resolver includes: a plurality of columnar cores disposed on an annular plate; a coil portion disposed around each of the columnar cores; and an annular rotor having a sinusoidal profile that rotates in a plane parallel to the top faces of the columnar cores around a rotation axis that passes through the center of the annular plate. The coil portion may be formed of a patterned coil formed on an annular substrate that has a plurality of through holes made therein through which the plurality of cores are passed, the patterned coil being formed around the through hole.
Description
Technical field
The present invention relates to a kind of magnetic resolver that is used for the anglec of rotation of detection rotor.
Background technology
Traditional magnetic resolver generally comprises rotating rotor core, stator core and film coil, stator core has two from the stator plate of grip roll core up and down and have along the prominent utmost point of the projection of the circumference of stator core, and film coil twines around each prominent utmost point of stator core.The anglec of rotation that magnetic resolver utilizes the induction of coil to change along with the anglec of rotation of rotor core to come the detection rotor core is (for example, referring to Japanese utility model application gazette No.5-3921 (" JP5-3921 ").
In above-described traditional solver, use with pattern and be formed on film shape coil on the substrate, compare with traditional solver that the recessed core body along radial direction towards rotor of lead on stator twines, can realize thinner solver body.In addition, twine lead acquisition coil and become unnecessary.Yet Japanese utility model application gazette No.5-3921 fails to disclose the concrete structure of the substrate that forms film shape coil thereon.If for each prominent utmost point individually provides the substrate of film shape coil, then assembling is difficult.In addition, when using film shape coil, compare the quantity of easy increase coil more hard to tolerate with lead traditional solver that the core body along radial direction towards rotor twines on stator.
In variable reluctance (VR) solver of this type, the variable range of magnetic resistance that effective raising is detected the resolution of the anglec of rotation and the rotation that precision is importantly followed rotor is bigger, and the pattern that magnetic resistance changes along with the rotation of rotor is level and smooth and stable.The pattern that magnetic resistance changes along with the rotation of rotor depends primarily on the structure of rotor core and the structure of the prominent utmost point (relativeness that comprises both).
Thus, although described the concrete structure of the profile of rotor core in JP 5-3921, all the position between the periphery of the relation between the form of the form of the form of the unexposed prominent utmost point, the prominent utmost point and rotor core and the prominent utmost point and rotor core concerns.Thereby, lack effective raising and detect the resolution of the anglec of rotation and the information of precision.
Summary of the invention
The thickness that the purpose of this invention is to provide a kind of easy assembling and need not enlarge markedly solver just can increase the magnetic resolver of coil quantity.Another object of the present invention provides a kind of resolution of the detection anglec of rotation and magnetic resolver of precision of improving.
Magnetic resolver according to first aspect present invention comprises: a plurality of columnar core that are arranged on the annular slab; Be arranged on the coil on every side of each columnar core; And ring-shaped rotor, it has the sine wheel profile, and the rotating shaft around the center of passing through annular slab rotates in the plane of the end face that is parallel to columnar core.
Magnetic resolver according to second aspect present invention comprises: stationary part, and it comprises base portion, base portion has a plurality of projection core bodys of being made by magnetic material on the one side, coiler part, each of itself and a plurality of core bodys is provided with accordingly; And rotor portion, it is arranged to from the top towards stationary part, wherein, when the end face of projection core body when look in the top and rotor portion overlapping areas along with the anglec of rotation of rotor portion with respect to stationary part changes and change, coiler part is formed by the coil of the patterning that forms on annular substrate, the annular substrate has a plurality of through holes that a plurality of core bodys pass, and patterned coil is formed on around the through hole.
A third aspect of the present invention is similar to second aspect, and difference is that base portion is made of the annular slab member, and the substrate that forms coiler part thereon places on the board member and core body partly passes through hole.Utilize third part of the present invention, can make productivity ratio be improved from a direction assembling solver.In addition, can when assembling, use through hole and projection to carry out the location, make the precision of assembling improve.
A fourth aspect of the present invention is similar to the above second aspect and the third aspect, and difference is to pile up a plurality of substrates, and wherein coiler part is formed on each substrate.Utilize a fourth aspect of the present invention, can increase coil winding quantity and need not to enlarge markedly the thickness of magnetic resolver body.
A fifth aspect of the present invention is similar to a fourth aspect of the present invention, and difference is to be provided with the polyphase winding part, describedly comprises the excitation phase mutually, and every phase coil partly is formed on the independent substrate.Utilize a fifth aspect of the present invention,, also regulate easily every phase even use heterogeneously.In addition, also become and in the variation of magnetic resolver, to use every phase substrate, thereby improved versatility.
A sixth aspect of the present invention is similar to a fifth aspect of the present invention, difference is to pile up a plurality of substrates, wherein in-phase coil partly is formed on each substrate, and by using the via hole that at least one of a plurality of substrates, forms to be electrically connected in-phase coil part on a plurality of substrates.Utilize sixth aspect present invention, can increase the quantity of every mutually required coil windings easily, and need not excessively to stop the reducing of thickness of magnetic resolver body.
Be similar to the magnetic resolver of first aspect according to the magnetic resolver of seventh aspect present invention, difference is that the radius of rotor is that the SIN function of being determined by the angle multiplication factor in variable and cycle changes according to the anglec of rotation.Utilize a seventh aspect of the present invention, can be so that the radius of rotor changes with the end face (circular face) of suitable mode with respect to columnar core.
Be similar to the magnetic resolver of the first or the 7th aspect according to the magnetic resolver of eighth aspect present invention, difference is that the profile variations zone is the part in the excursion of radius of rotor of rotor, and the radial position in profile variations zone is corresponding with the radial position of columnar core on annular slab.Utilize a eighth aspect of the present invention, can make the excursion maximization of the rotation magnetic resistance of following rotor.
Be similar to the 7th or the magnetic resolver of eight aspect according to the magnetic resolver of ninth aspect present invention, the amplitude of difference SIN function is determined based on the radius of columnar core.Utilize ninth aspect present invention, the mode of suitable form that can columnar core changes the radius of rotor.
Be similar to the magnetic resolver of the 9th aspect according to the magnetic resolver of tenth aspect present invention, the amplitude of difference SIN function is substantially equal to the radius r of columnar core, and the centre position in profile variations zone outwards is offset along the central axis of radial direction with respect to the columnar core on the annular slab.Utilize tenth aspect present invention, because between the periphery of the least radius part of rotor and core body, have the gap under the state of the most close core body periphery of least radius part that arrives rotor, can prevent since assembly error etc. the position of rotation place or near the interference that causes from the voltage waveform of coil output.
The tenth on the one hand magnetic resolver is similar to the magnetic resolver of the 9th aspect according to the present invention, and the difference skew is in 0.3 to 1.2mm scope of radial direction.Utilize the present invention the tenth on the one hand, because form the gap that size is fit to, can maintain the interference that prevents the voltage waveform of exporting from coil that causes during the position of rotation of the periphery of close core body when the least radius part that arrives rotor in the position of maximum horizontal roughly in the excursion of the magnetic resistance that will follow the rotor rotation along radial direction.
The magnetic resolver of the 12 aspect is similar to the magnetic resolver of the 9th aspect according to the present invention, the centre position in difference profile variations zone is consistent with the central axis of columnar core on the annular slab in the radial direction, and the amplitude of SIN function is in 0.8 to 0.9 times scope of the radius r of columnar core.Utilize the present invention the 12 aspect, can eliminate in essence since assembly error etc. and the least radius part of rotor the periphery of close core body the position of rotation place or near or the maximum radius part of rotor the periphery of close core body the position of rotation place or near the interference that causes from the voltage waveform of coil output.
Description of drawings
From following description to exemplary embodiment, with reference to accompanying drawing, aforementioned and other purpose, feature and advantage of the present invention will become obviously, and wherein, similar reference number is used for representing similar elements, wherein:
Fig. 1 is the exploded perspective view that the embodiment of magnetic resolver according to the present invention is shown.
Fig. 2 is the three-dimensional view that the magnetic resolver 10 of assembling is shown.
Fig. 3 shows the equivalent electric circuit of the magnetic resolver 10 of present embodiment.
Fig. 4 is the figure of flux of the magnetic resolver 10 of schematically illustrated present embodiment.
Fig. 5 A and Fig. 5 B are the figure that schematically shows the mechanism of magnetic resistance change rate in the magnetic resolver 10 of present embodiment.
Fig. 6 is the plan view of rotor plate 40.
Fig. 7 is the figure that overlapping area mode of variation along with rotor plate 40 rotations is shown.
Fig. 8 is from the figure of the voltage waveform of sine-phase coil and cosine-phase coil output when being illustrated in rotor plate 40 rotation.
Fig. 9 A and Fig. 9 B are because the plan view in explanation gap.
Figure 10 A and 10B are the zoomed-in views from the crest zone on every side of the waveform of the voltage of coil output.
Figure 11 is the figure that relation between the second embodiment transfer daughter board 40 and the core body 22 is shown.
Embodiment
Hereinafter with reference to accompanying drawing embodiments of the invention are described.
Fig. 1 is the exploded perspective view that illustrates according to the embodiment of magnetic resolver of the present invention.In description, " top " is not the direction that is illustrated under the state that magnetic resolver is mounted straight up, but expression is no matter how the orientation of magnetic resolver installs the direction that rotor portion exists with respect to stationary part along rotation.In this description and appended claim, the distance between the point on the rotor center that " radius " of rotor expression is rationally determined and the periphery of rotor.This center comprises the center circle in profile variations described later zone or the center of core-center pitch circle, the perhaps pivot of rotor.In the embodiment of the following stated, these centers overlap each other.
The magnetic resolver 10 of present embodiment is variable reluctance (VR) solver, and comprises as shown in Figure 1: the substrate 20 that forms the core body part on it; Form the substrate 30 (hereinafter referred to as " coil substrate ") of coiler part on it; With the rotor plate 40 that constitutes rotor portion.As shown in Figure 1, each of substrate 20, coil substrate 30 and rotor plate 40 forms disc shaped to realize thin magnetic resolver 10.Substrate 20, coil substrate 30 and rotor plate 40 have roughly the same profile (roughly the same maximum gauge).
On substrate 20, form projection core body 22.Core body 22 is the same with basic 20 situation to be made by iron (for example, Antaciron).Core body 22 can be integrally formed with substrate 20 by machining for example or etching, perhaps can place formation on the substrate 20 by the column duplexer that will form separately.
Each core body 22 is of similar shape.In this embodiment, each core body 22 is that the radius of circular cross section is the columnar protrusions of r.Core body 22 regularly along the circumference of annular base plate 20 on annular base plate 20.Particularly, the center of core body 22 (circular center) is positioned on the radius identical with the center of the rotating shaft 42 of rotor portion in the position every certain angle.In specific embodiment shown in the drawings, for example, with interval formation ten core bodys 22 (ten utmost points) of 36 degree.
Having spiral-shaped patterned coil 34 prints around each through hole 32.The coil 34 of patterning is realized by print electric conducting material (such as, copper) on dielectric substrate.Patterned coil 34 is connected in series.Connection between the coil 34 of patterning can realize by print connecting line (conducting film) on dielectric substrate.In the case, the printing that connects patterned coil 34 can be carried out simultaneously with the coil 34 of patterning roughly, makes the coil 34 that can carry out formation patterning on coil substrate 30 effectively and the electrical connection between them.
When coil substrate 30 placed on the substrate 20, projection core body 22 passed the through hole 32 of coil substrate 30.In this way, around a through hole 32, the corresponding pattern coil 34 that surrounds each utmost point forms the coiler part of the utmost point.
Preferably, by piling up or stacked a plurality of dielectric substrate (print pattern coil 34 on each substrate) forms coil substrate 30.In the case, the patterned coil on each layer same pole 34 is electrically connected in series by via hole.In this way, the requirement of coil windings can be provided effectively at every utmost point, and the radial width of annular coil substrate 30 needn't be increased.For convenience of explanation, each of a plurality of dielectric substrate of formation coil substrate 30 also is called coil substrate.
Preferably, (1 input/2 output mutually mutually in the present embodiment) individually is provided with coil substrate 30 at each phase.In the embodiment shown in the figures, as the coil substrate 30 of excitation coil (following also be called " excitation coil substrate 30a "), be set to independent coil substrate with the coil substrate 30 (following also be called " cosine-phase coil substrate 30b ") of the coil that acts on output cosine phase signals with as the coil substrate 30 (following also be called " sine-phase coil 30c ") of the coil of the sinusoidal phase signals of output.When forming coil substrate 30 separately mutually in this way, the coil substrate 30 that need not to change another phase just can change the structure of the patterned coil 34 of each phase (regulate or change winding quantity, winding direction etc.), makes versatility be improved at each.In addition, can respond the increase or the change of phase neatly.In addition, because identical, can also be by increasing the overall permanence that the coil substrate 30 that is formed for the patterned coil 34 of regulating thereon easily changes or regulate each phase coil.
In the present embodiment, form excitation coil substrate 30a by piling up two-layer dielectric substrate (printed patterns coil 34 on each dielectric substrate), and form each of cosine-phase coil substrate 30b and sine-phase coil substrate 30c by piling up six layers of dielectric substrate (printed patterns coil 34 on each dielectric substrate).The winding quantity and the winding direction of the patterned coil 34 of the every utmost point on each of each coil substrates 30 are specified to as described below, along with rotor plate 40 rotates (promptly, along with overlapping areas between core body 22 and the rotor plate 40 changes with rotation), the sine of induction expectation is exported mutually with cosine and is exported mutually.
By individually stacked coils substrate 30a, 30b can assemble each coil substrates 30a, 30b and the 30c for preparing separately mutually with 30c at each on substrate 20, perhaps otherwise can be, the substrate that engages be placed to assemble this each coil substrates 30a, 30b and 30c on the substrate 20 afterwards by coil substrate 30a, 30b and 30c are bonded together.At this moment, each polar curve circle 22 is by the through hole of the respective aperture that forms in each coil substrates 30a, 30b and 30c.Although in the embodiment shown in the figures, excitation coil substrate 3a, cosine-phase coil substrate 30b and sine-phase coil substrate 30c on substrate 20, pile up each coil substrates 30a, 30b and 30c with this sequence stack arbitrarily in this order.
Each coil substrates 30a, 30b and 30c can comprise their coupling parts 36 separately, and perhaps as shown in Figure 1, one can comprise coupling part 36 among coil substrate 30a, 30b and the 30c.Under latter instance, by using via hole, with line from (it is just much of that for example, 30b) to go up the coupling part 36 that the patterned coil 34 that forms is drawn out on the coil substrate 30a that for example has coupling part 36 in another coil substrate.In the case, each coil substrates 30a, 30b and 30c are bonded together, and by using via hole to set up this connection.After this, can assemble solver by coil substrate 30a, 30b and 30c are placed on the substrate 20.After coil substrate 30a, 30he30c is integrated in advance, carry out this assembling and further improved the manufacturing efficient and the accuracy of manufacture.
Fig. 2 is the three-dimensional view (but, rotor plate 40 does not illustrate) that the magnetic resolver 10 of assembling is shown.As shown in Figure 2, be stacked on each coil substrates 30a, 30b on the substrate 20 and the 30c connecting plate 72 by lid 70 as mentioned above and remain on suitable position with respect to substrate 20.In this way, form substrate 20 and each coil substrates 30a, 30b and the incorporate assembly of 30c.In this assembly, the patterned coil 34 of each utmost point on each of each coil substrates 30a, 30b and 30c forms the coiler part of corresponding each utmost point mutually respectively.In addition, the end portion of each pole piece body 22 (end face) is exposed by the through hole 32 of coil substrate 30 and the through hole 74 of lid 70 from lid 70.The end face of each pole piece body 22 can be roughly concordant with the end face of lid 70.
Thereby, according to present embodiment, can make to make to be very easy to by assembling solver from a direction (from the top) stacked coils substrate 30a, 30b and 30c.In addition, each pole piece body 22 is cooperated with the through hole 32 of respective aperture and is had positioning function, makes to be easy to assembly working and to need not to regulate after assembling and realize assembled with high precision by carrying out.Because obtain and the suitable coiler part of winding that twines around core body 34, twine lead around core body and become and do not needed by stacked coils substrate 30 (printed patterns coil 34 on each coil substrate 30).In addition, by with tabular stacking substrates 20, each coil substrates 30a, 30b and 30c and lid 70, can obtain thinner assembly.
In use, the rotating shaft 42 that rotor plate 40 has been installed inserts in the centre bore of ring-shaped component.At this moment, rotor plate 40 with certain spacing between the distance core body 22 from the top towards the end face of core body 22.This is the state that can use magnetic resolver 10 state of detection angles (that is, can).
Fig. 3 shows the equivalent electric circuit of the magnetic resolver 10 of the present embodiment that as above forms.
An end that is formed on the last excitation coil (it is meant all patterned coil 34 that are connected in series on the excitation coil substrate 30a) that forms of excitation coil substrate 30a as mentioned above is via connector ground connection, and its other end is connected to AC power supplies via connector.In operating process, AC power supplies applies for example ac input voltage of 4V to the two ends of the excitation coil that forms on excitation coil substrate 30a.
As mentioned above at an end of the sine-phase coil that forms on the sine-phase coil substrate 30c (it is meant all patterned coil 34 that are connected in series on the sinusoidal chorded coil substrate 30c) via connector ground connection, its other end is connected to the signal processor (not shown) via connector.In this way, sinusoidal phase output voltage (induced voltage) is fed to above-described signal processor.In the present embodiment, voltage sum (each voltage is responded on the corresponding two ends in extremely at ten) is as sinusoidal phase output voltage supply.
Similarly, an end that is formed on the cosine-phase coil (it is meant all patterned coil 34 that are connected in series on the cosine-phase coil substrate 30b) on the cosine-phase coil substrate 30b as mentioned above is via connector ground connection, and its other end is connected to the signal processor (not shown) via connector.In this way, cosine phase output voltage (induced voltage) is supplied aforesaid signal processor.In the present embodiment, voltage sum (each voltage is responded on corresponding one two ends of ten utmost points) is responded to as cosine phase output voltage.
Signal processor uses the anglec of rotation θ (the angle θ of rotating shaft 42) of following formula based on sinusoidal output voltage and cosine output voltage detection rotor plate 40:
θ＝1/N·tan
-1(E
COS-GND/E
SIN-GND)
Wherein, E
CON-GNDBe sinusoidal phase output voltage, E
SIN-GNDIt is sinusoidal phase output voltage.
Fig. 4 is the figure of flux that schematically shows the magnetic resolver 10 of present embodiment.Fig. 4 partly shows three utmost point fluxs and forms.As shown in Figure 4, when AC power supplies when excitation coil applies driving voltage, in every pair of core body 22, form closed magnetic loop, every pair of core body 22 is two adjacent core bodys 22 with cylindrical shape.Particularly, every centering, closed magnetic loop forms and passes a core body 22, the zone of passing rotor plate 40 from rotor 40 and end face overlapping areas this core body 22 (overlapping region) is to rotor 40 and end face overlapping areas another core body 22 (overlapping region), pass another core body 22, pass another core body 22, pass the zone of the substrate 20 between these two core bodys 22, turn back to a core body 22 then.Because substrate is made by magnetic material as mentioned above in the present embodiment, so can form the magnetic resistance low magnetic-path of comparing with the situation that substrate is made by nonmagnetic substance (such as insulating material).In this way, output voltage and input voltage ratio (transformation ratio) uprise, thereby, can strengthen the degree of resolving that detects the anglec of rotation.
Fig. 5 A and Fig. 5 B are the figure that schematically illustrates magnetic resistance change rate mechanism in the magnetic resolver 10 of present embodiment.Fig. 5 A and Fig. 5 B partly are illustrated in an extremely middle flux that forms.Fig. 5 A shows the flux that overlapping width A between the end face of the peripheral part of rotor plate 40 and core body 22 or area hour form.Fig. 5 B shows the flux that forms when overlapping width A is big.As shown in Fig. 5 A and Fig. 5 B, when the overlapping width A between the end face of the peripheral part of rotor plate 40 and core body 22 changes, pass the change width that the flux of core body 22 is blocked, follow the variation of magnetic resistance thus.As a result, change at the voltage of in the coiler part of core body 22, responding to (output voltage).Overlapping width A is along with the external diameter of rotor plate 40 rotation change with rotating shaft 42 changes.The anglec of rotation (anglec of rotation of rotating shaft 42) that the magnetic resolver 10 of present embodiment uses the magnetic resistance following the rotor rotation and change to come detection rotor plate 40.
In the VR of this type solver, to the degree of resolving that strengthen to detect the anglec of rotation and precision importantly magnetic resistance follow the excursion of rotation of rotor bigger, and the model that changes with the rotation of rotor of magnetic resistance is not subjected to the influence of individual difference; That is, rotation is stable.
Below will describe and to strengthen the degree of resolving that detects the anglec of rotation and the structure of precision.
Fig. 6 is the plan view of rotor plate 40.In Fig. 6, shown by dashed lines reach (360 °/N) half (state of rotor plate 40 during 180 °/N) angle of the angular spacings that the cycle as outline line changes when rotor plate 40 rotations.
The Function Y of the outline line (object line) of expression rotor plate 40 will be described now.At first, imagination is along any datum axis of the radial direction extension of the pivot that passes through rotor plate 40 (rotating shaft 42).The datum axis here is single-point line shown in Figure 6.In Fig. 6, show the state of rotor plate 40 when the maximum radius of rotor plate 40 partly is positioned on the datum axis by solid line, shown by dashed lines when the least radius of rotor plate 40 partly is positioned on the datum axis state of rotor plate 40.The angle multiplication factor of supposing rotor plate 40 is N, and then the maximum radius and the least radius of rotor plate 40 periodically appear on the datum axis when the anglec of rotation of rotor plate 40 has changed 180 °/N.
The position of the point of outline line on datum axis of the rotor plate 40 when as shown in FIG. 6, Function Y represents that the anglec of rotation is θ when the outermost position of the least radius of rotor plate 40 part on datum axis is defined as initial point.Particularly, Function Y is illustrated in poor between the radius of the rotor plate 40 the when anglec of rotation is θ on the datum axis and its least radius.In other words, Function Y shows the trend of change in location of the point of outline line on datum axis of rotor plate 40.
In first embodiment, Function Y is expressed as follows:
Y＝a{sinN(θ-90°/N)+1}
Wherein, N is the angle multiplication factor, and r (mm) is the radius of aforesaid core body 22, and a is an amplitude.This amplitude a can equal the radius r of core body 22.In the case, from then on formula obviously as seen, the position of the point of the outline line of rotor plate 40 on datum axis according to amplitude r along with the sine curve that anglec of rotation θ changes changes.Thereby the outline line of rotor plate 40 equals the diameter 2r of core body 22 along the excursion 2r of radial direction.When solver is the 7X solver, i.e. N=7, r=4[mm] time, then Function Y is expressed as follows.
Y＝4{sin7(θ-90°/7)+1}
For convenience of explanation, now the example that amplitude a equals radius r will be described.The zone of the rotor plate 40 between maximum radius and its least radius (this zone is 2r along the width of radial direction) is called " profile variations zone ", and the circle that radius equals least radius+r is called " profile variations regional center circle ".
In the present embodiment, relation between rotor plate 40 and the core body 22 set for profile variations zone as the peripheral part of rotor plate 40 from the top towards core body 22, and when profile region of variation when look in the top can be overlapping with the end face of core body 22, and the center circle of setting the profile variations zone for is roughly consistent with the circle (hereinafter referred to as " core-center pitch circle ") at center by each pole piece body 22.In the profile variations zone when when look in the top and the border circular areas of the end face of core body 22 (the projection circle of core body) overlapping areas hereinafter referred to as " overlapping region ".
When the position between aforesaid rotor plate 40 of employing and the core body 22 concerns, because the shape of the outline line of above-described rotor plate 40, when rotor plate 40 rotations, the overlapping region changes along with the amplitude that is roughly 2r along the width (hereinafter referred to as " overlapping width ") of radial direction.Should be noted that if the center circle and the core-center pitch circle of profile region of variation are in full accord when look in the top, then overlapping width is along with amplitude 2r changes.Overlapping width is determined the size of the area (hereinafter referred to as " overlapping area ") of overlapping region.Particularly, the amplitude (excursion) of overlapping width is big more in rotor plate 40 rotary courses, and the amplitude of overlapping area (excursion) just becomes big more.
Fig. 7 shows the mode that overlapping area changes along with rotor plate 40 rotations.Fig. 8 shows in rotor plate 40 rotation the voltage waveform from sine-phase coil and cosine-phase coil output.
In this embodiment, angle multiplication factor N is 7, thereby overlapping area is along with 2 π/7 (rad) cycle sinusoidal variations in rotor plate 40 rotations.Similarly, when the anglec of rotation θ of rotor plate 40 changes, be offset under the situation that reaches pi/2 along with 2 π/7 (rad) cycle sinusoidal variations each other mutually at each from the voltage of sine-phase coil and cosine-phase coil output.
Because the variation of overlapping area causes magnetic resistance change rate as describing at Fig. 5, so the excursion of overlapping area is big more in rotor plate 40 rotary courses, then the excursion of magnetic resistance just becomes big more in rotor plate 40 rotary courses.Simultaneously, the voltage excursion (sinusoidal amplitude) the process of rotor plate 40 rotations from each phase coil (sine-phase coil and cosine-phase coil) output becomes big.
In the present embodiment, because the position of the center circle in profile variations zone and core-center pitch circle relation is roughly consistent each other, so overlapping width is along with the amplitude variations that be roughly 2r corresponding with the diameter 2r of aforesaid core body 22.Thereby this embodiment makes that can obtain to carry out angle at the highest level place that can expect when using the core body 22 with certain diameter detect the required change in voltage from coil output.In this way, can strengthen the degree of resolving that detects the anglec of rotation, thereby, accuracy of detection improved.On the contrary, if the outline line of rotor plate 40 along the excursion of radial direction significantly greater than 2r, then overlapping area is with respect to the change rate of the variation of the anglec of rotation diminish (producing the indeclinable angular region of degree that rotor plate 40 allows fluxs to pass through).Owing to this reason, be difficult to strengthen degree of resolving and the precision that detects the anglec of rotation.
Fig. 9 A and 9B illustrate between rotor plate 40 and the core body 22 the more preferably figure of position relation, and are the partial views (mode that concentrates on single core body 22 with attentiveness describes Fig. 9 A and Fig. 9 B) that attentiveness concentrates on the core body 22 of the utmost point.Fig. 9 A shows the state that the end face of core body 22 is at utmost covered by the profile variations zone.Fig. 9 B shows the state of realizing during with respect to the position of rotation Rotate 180 shown in Fig. 9 A °/N when rotor plate 40.In Fig. 9 A and Fig. 9 B, solid line is represented core-center pitch circle, has been shown in dotted line the minimum and maximum radius (depicting its track when rotor rotates) of rotor plate 40.
In the example shown in Fig. 9 A and Fig. 9 B, the center circle and the core-center pitch circle in profile variations zone are not quite identical, and the center radius of a circle in profile variations zone is slightly less than the radius of core-center pitch circle.Thereby the difference between the maximum radius of core-center pitch circle radius and rotor plate 40 has increased corresponding amount.Owing to this reason, shown in Fig. 9 B, when the least radius of rotor plate 40 partly arrived with position, corresponding angle, the center of core body 22, the gap of looking from the top appeared between core body 22 and the rotor plate 40.Particularly, when rotor plate 40 during at the position of rotation place shown in Fig. 9 B, the outline line of the rotor plate 40 of looking from the top does not intersect with the circle (projection circle) of the end face of core body 22, and opens from the marginating compartment of the projection circle of core body 22.The size in gap depends on the structure (for example, radius r) of core body etc., and preferably, and size is in 0.3 to 1.2mm scope of radial direction.
When rotor plate 40 during at the position of rotation shown in Fig. 9 B, there is the gap, make that rotor plate 40 does not allow to pass rotor plate 40 from the flux of the ambient radiation of core body 22, make and the magnetic resistance at this position of rotation can be minimized.By such gap is provided, can prevent rotor plate 40 because the trueness error of machining and/or assembling rotating shaft 42 and rotor plate 40 and peripheral overlapping at this position of rotation place and core body 22.Thereby, the output signal that hold in both hands the Shandong that can obtain more to be not easy to be subjected to individual difference influences.By the gap being set shown in Fig. 9 B, obtain more to be not easy to be subjected to the stable waveform from the voltage of coil output of the various trueness errors influences of machining and/or assembling when can be maximized in excursion from the voltage of coil output near the position of the periphery of core body 22 at second path portion of rotor plate 40.In this way, can stablize the level and smooth well-regulated waveform of acquisition, and significantly improve the precision that detects the anglec of rotation from coil output.Should be noted that and work as the angle multiplication factor greater than for the moment, this gap is particularly useful, and this angle multiplication factor is seven in the present embodiment, that is, the profile irregularity of rotor plate 40 is big.
Figure 10 A and Figure 10 B are the zoomed-in views from the crest regional X on every side of the waveform of the voltage of coil output shown in Figure 8.Figure 10 A show when as mentioned above according to by Y=r{sinN (θ-90 °/N)+output waveform that curve that 1} represents obtains when forming the outline line of rotor plate 40.Figure 10 B show according to by Y=a{sinN (θ-90 °/N)+1} (output waveform that obtains when wherein the curve of the expression of a＞r) forms the outline line of rotor plate 40.
From Figure 10 A as seen, if according to by Y=r{sinN (θ-90 °/N)+curve that 1} represents forms the outline line of rotor plate 40, and the gap is set as mentioned above, then can stably obtains from the smooth waveform of the voltage of coil output, wherein its crest place and near interference less.
On the other hand, can see, on the contrary, if according to by Y=a{sinN (θ-90 °/N)+(wherein the curve of the expression of a＞r) forms the outline line of rotor plate 40 to 1}, although from the excursion of the voltage of coil output keep with according to by Y=r{sinN (θ-90 °/N)+curve that 1} represents forms the similar level of situation of outline line, the crest of the waveform of the voltage of exporting from coil and near disturb.Particularly, when the maximum radius of rotor plate 40 partly arrives with position, corresponding angle, the center of core body 22, be interfered from the waveform of the voltage of coil output.
As mentioned above, when the function of the outline line that limits rotor 40 makes the radius r of core body 22 and amplitude be equal to each other, and when the gap is set, can obtain the smooth waveform of the voltage exported from coil, wherein its crest place and near interference less.
The different details that are the outline line of rotor plate 40 grades of second embodiment with the above first embodiment.Below the difference of constructing between second embodiment and first embodiment will be described mainly.Unless otherwise defined, use various terms according to the definition that provides in the above description to first embodiment.
For second embodiment, Function Y is expressed as follows:
Y＝A·r{sinN(θ-90°/N)+1}
Wherein, A is a coefficient, and as mentioned below preferably being set in 0.8 to 0.9 the scope.From then on formula obviously as seen, along with anglec of rotation θ changes, the position of the point of the outline line of rotor plate 40 on datum axis is the sinusoidal variation of Ar that is slightly less than the radius r of core body 22 according to amplitude.Particularly, the outline line of rotor plate 40 is set diameter 2r less than core body 22 for along the excursion 2Ar of radial direction.When for example solver is the 7X solver, i.e. N=7, and r=4[mm] time, Function Y is expressed as follows:
Y＝4A{sin7(θ-90°/7)+1}
For convenience of explanation, the maximum radius of rotor plate 40 and the zone between the least radius (this zone is 2Ar along the width of radial direction) is called " profile variations zone ", and the circle that radius equals least radius+Ar is called " profile variations regional center circle ".In a second embodiment, the position is concerned that the center circle of setting the profile variations zone for is roughly consistent with core-center pitch circle.
Figure 11 is the figure that is illustrated in relation between the second embodiment transfer daughter board 40 and the core body 22, and is the partial view (mode that concentrates on single core body 22 with attentiveness describes Figure 11) that attentiveness concentrates on the core body 22 of the utmost point.Figure 11 shows the state that the profile variations zone farthest covers the end face of core body 22.
In the example depicted in fig. 11, the center circle in profile variations zone is fully consistent with core-center pitch circle.Thereby when the maximum radius of rotor plate 40 partly arrived with position, corresponding angle, the center of core body, as shown in figure 11, the peripheral part of the core body 22 of looking from the top was positioned at from the maximum radius of rotor plate 40 part along the outside r of radial direction (1-A).Similarly, when the least radius of rotor plate 40 partly arrived with position, corresponding angle, the center of core body 22, through not shown, the peripheral part of the core body 22 of looking from the top was positioned at the least radius part of rotor plate 40 along the inside r of radial direction (1-A).
For aforesaid second embodiment, although length r (1-A) surplus along radial direction is set, and correspondingly diminish from the excursion of the voltage of coil output, but can eliminate in essence when the maximum radius part of rotor plate 40 or least radius partly arrive with position, corresponding angle, the center of core body 22 from the waveform of the voltage of coil output be interfered (referring to Figure 10 B).In addition, similar surplus is set, can absorbs the trueness error of machining and/or assemble rotor axle 42 and rotor plate 40 effectively by the outside and inboard in radial direction.Thereby, the output signal that hold in both hands the Shandong that can obtain to be not easy to be subjected to individual difference influences.
Although described example embodiment of the present invention in detail, the invention is not restricted to the above embodiment.Can carry out various modifications and replacement to the above embodiment without departing from the present invention.
For example, although use loopful shape coil substrate 30 in the above embodiment, one deck annular substrate can be made up of a plurality of individual components.For example, can also have print coil part on semicircular two substrates, then two substrates engaged, the complete annular coil substrate of final thus formation.
In addition, although in above-described embodiment, patterned coil 34 is printed on dielectric substrate, and patterned coil 34 can form by any method, as long as form the patterned coil of being made by conducting film (film) 34.Patterned coil 34 can be by using another printing technique such as the film transfer method; By at substrate deposition be bonded on the film that wherein forms similar coil pattern; Perhaps wait and form by coining, steam deposition.Alternatively, although see that from the angle of assembling easily and reduce thickness it is disadvantageous, the coil corresponding with patterned coil 34 can by the use lead be formed on core body 22 around.
Although in above embodiment, adopted the structure of " 1 input/2 output mutually mutually ", can adopt the structure of " 1 input/1 output mutually mutually ".The concrete structure of this phase is arbitrarily.
As mentioned above, the present invention can be used in the various device of the anglec of rotation of detection rotor.This application can comprise the angular sensor of the anglec of rotation that for example detects the axle in the power steering system.
Claims (13)
1. magnetic resolver comprises:
Stationary part, it comprises base portion, described base portion has a plurality of projection core bodys of being made by magnetic material on the one side,
Coiler part, each of itself and described a plurality of core bodys is provided with accordingly; And
Rotor portion, it is arranged to from the top towards described stationary part, wherein
When the end face of described projection core body when look in the top and described rotor portion overlapping areas along with the anglec of rotation of described rotor portion with respect to described stationary part changes and changes, and
Described coiler part is formed by the coil of the patterning that forms on annular substrate, and described annular substrate has a plurality of through holes that described a plurality of core body passes, and described patterned coil is formed on around the described through hole.
2. magnetic resolver according to claim 1, wherein
Described base portion is made of the annular slab member, and
The substrate that forms described coiler part on it places on the described board member, and described core body partly passes described through hole.
3. magnetic resolver according to claim 1 and 2, wherein
Pile up a plurality of described substrates, wherein said coiler part is formed on each described substrate.
4. magnetic resolver according to claim 3, wherein
Heterogeneous described coiler part is set, the described excitation phase that comprises mutually, and
Every mutually described coiler part is formed on the independent substrate.
5. magnetic resolver according to claim 4, wherein
Pile up a plurality of described substrates, wherein the described coiler part of homophase is formed on each described substrate, and by using the via hole that at least one of described a plurality of substrates, forms to be electrically connected the described coiler part of homophase on described a plurality of substrate.
6. magnetic resolver according to claim 1 wherein, is formed on described patterned coil around the described core body by using lead.
7. magnetic resolver comprises:
A plurality of columnar core, it is arranged on the annular slab;
Coil, its be arranged on each described columnar core around; And
Ring-shaped rotor, it has the sine wheel profile, and the rotating shaft around the center of passing through described annular slab rotates in the plane of the end face that is parallel to described columnar core.
8. magnetic resolver according to claim 7, wherein
The radius of described rotor is that the SIN function of being determined by the angle multiplication factor in variable and cycle changes according to the anglec of rotation.
9. according to claim 7 or 8 described magnetic resolvers, wherein
The profile variations zone is the part in the excursion of radius of described rotor of described rotor, and the radial position in described profile variations zone is corresponding with the radial position of described columnar core on described annular slab.
10. according to Claim 8 or 9 described magnetic resolvers, wherein
The amplitude of described SIN function is determined based on the radius of described columnar core.
11. magnetic resolver according to claim 10, wherein
The amplitude of described SIN function is substantially equal to the radius of described columnar core, and
The centre position in described profile variations zone outwards is offset along the central axis of radial direction with respect to the described columnar core on the described annular slab.
12. magnetic resolver according to claim 11, wherein
Described skew is in 0.3 to 1.2mm scope of radial direction.
13. magnetic resolver according to claim 10, wherein
The centre position in described profile variations zone is consistent with the central axis of described columnar core on the described annular slab in the radial direction, and
The amplitude of described SIN function is in 0.8 to 0.9 times scope of the radius r of described columnar core.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005372896A JP4603973B2 (en) | 2005-12-26 | 2005-12-26 | Magnetic resolver |
| JP372896/2005 | 2005-12-26 | ||
| JP2006010394A JP4842644B2 (en) | 2006-01-18 | 2006-01-18 | Magnetic resolver |
| JP010394/2006 | 2006-01-18 | ||
| PCT/IB2006/003762 WO2007074375A2 (en) | 2005-12-26 | 2006-12-22 | Magnetic resolver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101346873A true CN101346873A (en) | 2009-01-14 |
| CN101346873B CN101346873B (en) | 2012-02-22 |
Family
ID=38297872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800493708A Active CN101346873B (en) | 2005-12-26 | 2006-12-22 | Magnetic resolver |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4603973B2 (en) |
| CN (1) | CN101346873B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055295A (en) * | 2009-11-09 | 2011-05-11 | 爱三工业株式会社 | Rotation angle sensor |
| CN102865808A (en) * | 2011-07-05 | 2013-01-09 | 阿斯莫有限公司 | Variable reluctance type angle sensor |
| CN107869951A (en) * | 2016-09-28 | 2018-04-03 | 英飞凌科技股份有限公司 | Magnetic angular sensor device and the method for operation |
| CN111527383A (en) * | 2017-12-22 | 2020-08-11 | 株式会社松尾制作所 | Rotation angle sensor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4850869B2 (en) | 2008-05-20 | 2012-01-11 | トヨタ自動車株式会社 | Resolver |
| JP5467310B2 (en) * | 2009-04-17 | 2014-04-09 | 多摩川精機株式会社 | Resolver and method for producing resolver |
| JP4790054B2 (en) | 2009-09-09 | 2011-10-12 | トヨタ自動車株式会社 | Magnetic resolver |
| WO2014037024A1 (en) * | 2012-09-10 | 2014-03-13 | Cameron International Corporation | Disc resolver and brushless direct current motor including the same |
| EP4325173A4 (en) * | 2021-04-15 | 2024-06-05 | Mitsubishi Electric Corporation | Resolver and electric power steering device equipped with same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239288A (en) * | 1990-03-09 | 1993-08-24 | Transicoil Inc. | Resolver having planar windings |
| JP4002308B2 (en) * | 1995-08-10 | 2007-10-31 | 株式会社アミテック | Inductive rotational position detector |
| JP3024972B1 (en) * | 1999-04-01 | 2000-03-27 | 多摩川精機株式会社 | Angle detector |
| JP4446056B2 (en) * | 2000-06-09 | 2010-04-07 | 多摩川精機株式会社 | Angle detector |
| JP2004007902A (en) * | 2002-05-31 | 2004-01-08 | Tamagawa Seiki Co Ltd | Insulating cap structure of rotary machine |
| JP3864380B2 (en) * | 2002-09-25 | 2006-12-27 | ミネベア株式会社 | Resolver input / output terminal structure and resolver connection method using the same |
-
2005
- 2005-12-26 JP JP2005372896A patent/JP4603973B2/en active Active
-
2006
- 2006-12-22 CN CN2006800493708A patent/CN101346873B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055295A (en) * | 2009-11-09 | 2011-05-11 | 爱三工业株式会社 | Rotation angle sensor |
| CN102055295B (en) * | 2009-11-09 | 2014-06-18 | 爱三工业株式会社 | Rotation angle sensor |
| CN102865808A (en) * | 2011-07-05 | 2013-01-09 | 阿斯莫有限公司 | Variable reluctance type angle sensor |
| CN102865808B (en) * | 2011-07-05 | 2016-10-05 | 阿斯莫有限公司 | Variable reluctance type angle detector |
| CN107869951A (en) * | 2016-09-28 | 2018-04-03 | 英飞凌科技股份有限公司 | Magnetic angular sensor device and the method for operation |
| CN111527383A (en) * | 2017-12-22 | 2020-08-11 | 株式会社松尾制作所 | Rotation angle sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007171131A (en) | 2007-07-05 |
| CN101346873B (en) | 2012-02-22 |
| JP4603973B2 (en) | 2010-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101346873B (en) | Magnetic resolver | |
| US8148973B2 (en) | Magnetic resolver | |
| CN102055295B (en) | Rotation angle sensor | |
| US20100156401A1 (en) | Magnetic resolver and method of manufacturing the same | |
| US7199691B2 (en) | Flat resolver | |
| CN102959362B (en) | Angle detection device | |
| JP5091905B2 (en) | Motor structure with resolver | |
| US20140117980A1 (en) | Position sensing transducer | |
| US20130271122A1 (en) | Angle sensor | |
| JP2012231648A (en) | Motor rotor and motor | |
| EP1630935A2 (en) | Variable-reluctance resolver and multi-resolver using same | |
| EP3816587B1 (en) | Rotational angle sensor | |
| CN107401975A (en) | For carrying out the linear response formula position sensor of angular surveying to the mechanical part of rotation | |
| KR101065220B1 (en) | motor | |
| JP4842644B2 (en) | Magnetic resolver | |
| WO2022124415A1 (en) | Resolver | |
| US20180226862A1 (en) | Rotational position detection device and motor device | |
| JP2013083485A (en) | Angle sensor | |
| JP5755099B2 (en) | Angle sensor | |
| EP4177572B1 (en) | Rotary position sensor | |
| JP2004101423A (en) | Print resolver | |
| JPS6339450A (en) | Brushless motor | |
| JP2008116353A (en) | Flexible substrate resolver | |
| JP5762240B2 (en) | Position sensor and angle sensor | |
| JP2014122867A (en) | Angle sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |