WO2018114006A1 - Résolveur - Google Patents

Résolveur Download PDF

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Publication number
WO2018114006A1
WO2018114006A1 PCT/EP2016/082621 EP2016082621W WO2018114006A1 WO 2018114006 A1 WO2018114006 A1 WO 2018114006A1 EP 2016082621 W EP2016082621 W EP 2016082621W WO 2018114006 A1 WO2018114006 A1 WO 2018114006A1
Authority
WO
WIPO (PCT)
Prior art keywords
loop
azimuthal position
coil arrangement
axis
measuring
Prior art date
Application number
PCT/EP2016/082621
Other languages
English (en)
Inventor
Walter Wyss
Original Assignee
Admotec Precision Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Admotec Precision Ag filed Critical Admotec Precision Ag
Priority to PCT/EP2016/082621 priority Critical patent/WO2018114006A1/fr
Publication of WO2018114006A1 publication Critical patent/WO2018114006A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/80—Manufacturing details of magnetic targets for magnetic encoders

Definitions

  • the invention addressed herein relates to an azimuthal position resolver. Under further aspects, the invention relates to an azimuthal position measuring arrangement and to a method of producing an azimuthal position indicative signal .
  • resolvers for measuring an angular position or an angular velocity of e.g. a shaft are applied.
  • One type of azimuthal position resolvers uses an induced magnetic field between a stator and a rotor being rotatable around an axis with respect to the stator.
  • the rotor may e.g. be arranged on the shaft, the angular position of which is to be measured.
  • the rotation axis of the rotor defines a cylindrical coordinate system with an axial direction parallel to the axis, a radial direction orthogonal to the axis and an azimuthal direction along a circumference described by the rotation of the rotor around the axis.
  • Such azimuthal position resolvers have a rotor that creates or modifies a spatial distribution of a magnetic field in a way that is specific to the azimuthal position of the rotor. By measuring this magnetic field on the stator side, the azimuthal position of the rotor with respect to the stator can be determined.
  • An azimuthal position resolver for measuring an angular position using an induced magnetic field between a stator and a rotor is known e.g. from the document
  • resolver comprises a loop of magnetic material extending around the axis of the rotor and being arranged along a geometric plane cutting the axis of the rotor under an oblique angle.
  • This loop of magnetic material is placed between two hollow cylindrical bodies, which are made of non-magnetic material.
  • cylindrical bodies have faces running parallel to the geometric plane. These faces are in contact with the loop of magnetic material to hold the loop in place, such that the rotor as a whole has the form of a hollow cylinder having on its outer surface magnetic pole faces formed by the loop of magnetic material. A sinusoidally shaped form of this pole faces becomes apparent, if the cylinder surface in unrolled on a plane. Only the stator of an azimuthal position resolver according to EP 0 535 181 Al is wound with an exciting coil and with measuring coils.
  • azimuthal position information of high angular precision is considered as valuable, particularly in the field of industrial automation, where azimuthal position resolvers are used in the context of motion control of robots. Furthermore, a general trend towards higher
  • the object of the present invention is to provide an alternative azimuthal position resolver, in particular to provide an azimuthal position resolver alleviating or solving one or more of the problems of known azimuthal position resolvers.
  • Such an azimuthal position resolver comprises a rotor being rotatable around an axis with respect to a stator, wherein
  • said rotor comprises
  • an exciting coil arrangement generating a magnetic field entering said loop, propagating along at least a part of said loop and emanating from said loop,
  • the inventor has recognized that the azimuthal position resolver according to the invention leads to a smooth characteristic of the dependency of the induced voltage in the measuring coil arrangement on the azimuthal position of the rotor.
  • higher order harmonic higher order harmonic
  • the rotor comprises two non-magnetic positioning elements on both axial sides of the loop made of magnetic material and in contact with the loop.
  • the positioning elements and the loop may define a common radially outer surface with first and second coaxial cylindrical sections being separated by a circumferential ring groove, which runs in the loop only, i.e. at no point crossing the border between the magnetic and the nonmagnetic material. Narrow tips of magnetic material
  • the rotor comprises a non-magnetic sleeve being in contact with an outer circumference of the loop.
  • the sleeve may be a hollow cylindrical sleeve.
  • the sleeve may comprise titanium or a titanium alloy.
  • the inventor has realized that his embodiment may be used in applications leading to very high rotational speed of the rotor. Even at high rotational speeds a stable
  • the sleeve has the effect of mechanically stabilizing the rotor and in particular the ring on the rotor.
  • the material of the ring may be selected mainly on the grounds of the magnetic properties of the ring.
  • an alloy having high magnetic permeability but low tensile strength may be selected, as the sleeve provides the mechanical stability needed.
  • At least the first and second saddle coils have an opening angle of 120° in azimuthal direction with respect to the axis.
  • an azimuthal position resolver provides particularly clean signals.
  • the saddle coils having opening angles of 120° in azimuthal direction are immune against induction of signals, which have a third order harmonic dependency on the azimuthal position of the rotor.
  • a magnetic flux distribution having a third order harmonic dependency i.e. a combination of cos(3-9) and sin(3-9), ⁇ being the azimuthal position of the rotor
  • ⁇ being the azimuthal position of the rotor
  • the azimuthal position resolver according to this embodiment of the invention delivers clean signals of time derivatives of the azimuthal position of the rotor.
  • first, second and higher order time derivatives calculated based on the azimuthal position of the rotor to derive angular speed, angular acceleration and angular jerk are with increasing order increasingly sensitive to irregularities in the basic signal describing the azimuthal position.
  • the azimuthal position resolver according to the invention keeps such irregularities at a low level.
  • At least one of said first and second measuring coil arrangements comprises saddle coils defining areas each surrounded by a respective number of coil windings being an approximation to the sine function of the azimuthal position of the area multiplied by a factor common to all the saddle coils.
  • the single saddle coils may be wound around projections of rings, as described in the context of another embodiment.
  • the azimuthal position of the areas may be defined by the center of the areas.
  • the areas may be defined by saddle coils overlapping each other, thus some area may be defined by the overlap area of one or several of the saddle coils.
  • positive and negative winding numbers may be added up to a total winding number for the respective area.
  • At least one of the first and the second measuring coil arrangements comprises a group of coils with at least two of the respective saddle coils connected in series .
  • Magnetic flux crossing two or more saddle coils leads to higher voltages at the terminals of the measuring coils arrangements and to increased signal to noise ratio.
  • the above- mentioned group of coils comprises mutually overlapping of the saddle coils connected in series.
  • sensitivity of the measuring coil arrangement may be matched to the spatial distribution of the magnetic flux to be picked up, e.g. approximating a sine shape distribution along the azimuthal direction.
  • saddle coils of the group of coils are connected in series and are pairwise arranged on opposite azimuthal sides of the stator, in particular spaced by 180° in azimuthal direction with respect to the axis.
  • azimuthal side from the stator into the rotor and emanating on the opposite side may be picked up and converted
  • geometric form of the second measuring coil arrangement corresponds to the geometric form of the first measuring coil arrangement and wherein the position of the second measuring coil arrangement is rotated by 90° around the axis with respect to the first measuring coil arrangement.
  • complementary signals are generated by the first and second measuring coil arrangement, such as a signal dependent on the cosine of the azimuthal position of the rotor and a signal dependent on the sine of the
  • azimuthal position resolver comprises a third measuring coil arrangement, wherein the geometric forms of the second and third measuring coil arrangements correspond to the geometric form of the first measuring coil arrangement and the position of the second and third measuring coil arrangement are rotated by +120° and -120°, respectively, around the axis with respect to the first measuring coil arrangement .
  • alternating current of a three-phase rotary current are measured with this embodiment of the azimuthal position resolver. Having a third signal increases the reliability of the azimuthal position resolver.
  • the stator comprises at least a first ring with a first number of equally spaced projections on an internal or external circumference, the first number being divisible by three, and wherein the first and or second saddle coils each surround a separate group of the projections comprising a second number of neighboring projections, the second number being equal to the first number divided by three, in particular wherein the first number equals twelve and the second number equals four.
  • the projections in this embodiment may be formed similar to teeth of a gear-wheel, either as inner toothing on an internal circumference or as outer toothing on an external circumference of the ring. Winding the coils of the measuring coils arrangements around a third of the equally spaced projections leads in a particularly simple way to saddle coils having an opening angle of 120° in azimuthal direction with respect to the axis.
  • An embodiment having twelve projections, or grooves respectively, on its circumference makes possible to arrange the second
  • the stator comprises a second ring having a geometric form
  • first and or second saddle coils surround a
  • the first and/or second ring comprises a magnetic material.
  • the magnetic material concentrates the magnetic flux in the projections and thereby increases the voltage induced in the measurement coil arrangement.
  • the exciting coil arrangement comprises a circular coil coaxial to the axis and having a center coinciding with a center of the loop .
  • the exciting coils arrangement according to this embodiment is particularly simple to build. Depending on the direction of current applied to the circular coil, it generates a magnetic field along the axis and on a larger radius pointing towards the axis on a first axial side of the circular coil and pointing away from the axis on the opposite axial side of the circular coil.
  • first and opposite sides switch roles according to the current flow.
  • At least one of said first and second measuring coil arrangements comprises saddle coils defining areas each surrounded by a respective number of coil windings being an approximation to the sine function of the azimuthal position of the area multiplied by a factor common to all the saddle coils.
  • the single saddle coils may be wound around projections of rings, as described in the context of another embodiment.
  • the azimuthal position of the areas may be defined by the center of the areas.
  • the areas may be defined by saddle coils overlapping each other, thus some area may be defined by the overlap area of one or several of the saddle coils.
  • positive and negative winding numbers may be added up to a total winding number for the respective area.
  • the stator comprises a first and a second ring spaced from each other and coaxially with the axis, each ring having a respective multitude of axially oriented first and second grooves, two neighboring grooves defining a respectively first or second projection in between them,
  • At least one of the exciting coil arrangement, the first measuring coil arrangement and the second measuring coil arrangement comprises
  • first and second ring may be made of magnetic material, thus being part of a magnetic structure guiding the magnetic field lines toward the rotor.
  • the two ring may be axially spaced by a further ring made of magnetic material.
  • the first and second ring may have identical geometry.
  • an azimuthal position measuring arrangement comprises
  • the invention is further directed to a method of
  • position resolver comprises the steps of: - manufacturing a first subassembly comprising the first coils arranged in grooves of the first ring only;
  • the applied alternating current may e.g. have a frequency in the range of 5 kHz to 50 kHz.
  • Non-magnetic materials may e.g. be titanium, aluminum or austenitic steel (e.g. most types of stainless steel) .
  • the discrimination between magnetic and non-magnetic shall be made under the temperature conditions in which the azimuthal position resolver is used.
  • the loop of magnetic material may consists of magnetically soft material, in particular of high permeability magnetic material. This may e.g.
  • the loop may be made of several sheets stacked upon each other.
  • the stator may comprise magnetic elements e.g. to guide magnetic flux generated by the exciting coil arrangement towards the rotor .
  • Fig. 1 a schematic perspective view of the azimuthal position resolver according to the invention
  • FIG. 2 schematic flattened views of measuring coil arrangements in Fig. 2. a) to 2.d) according to
  • Fig. 3 a perspective, partially cut-away view of a rotor and a stator according to an embodiment
  • Fig. 4 a functional diagram of an azimuthal position resolver
  • Fig. 5 a partially cut-away view of a rotor according to an embodiment
  • Fig. 6 a partially cut-away view of a rotor according to a further embodiment
  • Fig. 7 shows in Fig. 7. a) to 7.d) in schematic
  • Fig. 8. a) shows in schematic flattened view an
  • FIG. 1 shows schematically and simplified, an azimuthal position resolver according to the invention.
  • the azimuthal position resolver 10 comprises a rotor 1 and a stator 2.
  • the rotor 1 is rotatable around an axis 3.
  • the rotor comprises a loop 4 made of magnetic material shown
  • the loop 4 extends around the axis 3 and along a geometric plane cutting the axis under an oblique angle, such that the axial position of the loop varies around the circumference of the rotor. In the position shown in this figure, this axial position varies from a lower axial position on the left side in the figure to an upper axial position on the right side in the figure.
  • Schematically and simplified the position of the stator 2 is indicated by dashed lines.
  • the stator comprises an exciting coil arrangement P.
  • the exciting coil arrangement When provided with a current, the exciting coil arrangement creates a magnetic field H, the direction of which is indicated by arrows at some selected positions and for a given direction of current - here the direction is such that the magnetic field has a field component upward in the region of the rotor.
  • the magnetic field H generated by the exciting coil enters the loop, propagates along a part of the loop and emanates from the loop.
  • the stator further comprises a first measuring coil arrangement SI and a second measuring coil arrangement shown as thick black and fine double lines to facilitate distinguishing them in the overlapping region on the right side of the figure.
  • each a saddle coil facing the axis 3. This way, the saddle coils pick up magnetic flux entering or emanating radially from the loop 4 on the rotor.
  • the saddle coils both have an opening angle oti or ot2 ,
  • Fig. 2. a) shows in a schematic flattened view, i.e.
  • the saddle coils displayed in a simplified manner may comprise a multiplicity of coil windings.
  • First and second measuring coil arrangements are offset with respect to each other by 90° in azimuthal direction. This way, the signal induced in the first and second measurement arrangement shows a cosine or sine, respectively, dependency on the azimuthal position of the rotor. The situation of the measurement coil
  • Fig. 2.b shows a first measuring coil arrangement SI according to an embodiment in a similar view as Fig. 2. a) .
  • the first measuring coil arrangement comprises a group of coils with at least two, in this particular case three, saddle coils connected in series.
  • the saddle coils in the group mutually overlap.
  • Each of the saddle coils has an azimuthal opening angle of ai 120°.
  • ai 120° For better visibility of the individual saddle coils, they are slightly offset in their height in the figure. This offset does not need to be translated into a corresponding axial offset of the coils on the stator.
  • the second measuring coil arrangement is not shown in this figure. The second
  • measuring coils arrangement may comprise a similar group of coils offset in azimuthal direction a, e.g. offset by 90°.
  • Fig. 2.c shows a first measuring coil arrangement SI according to a further embodiment in a similar view as Fig. 2. a) .
  • a pair of saddle coils is connected in series. Both saddle coils of the pair are arranged on opposite sides of the stator. In this case they are spaced by 180° in
  • Fig. 2.d shows a first measuring coil arrangement SI according to a combination of the embodiments shown in Fig. 2.b) and Fig. 2.c) in a similar view as Fig. 2. a) .
  • the measuring coil arrangement comprises two groups of mutually overlapping saddle coils. All saddle coils are connected in series.
  • the saddle coils are pairwise arranged on opposite azimuthal sides of the stator, in particular spaced by 180° in azimuthal direction.
  • the relative winding sense of the coils in a pair of coils being arranged on opposite
  • azimuthal sides of the stator may be selected such that the voltage induced in the individual coils by a magnetic flux traversing the stator adds up in the series connection of the coils.
  • a measuring coil arrangement as shown in Fig. 2.d) may be wound on ring structure of the stator having twelve equally spaced axial grooves on a circumference.
  • the saddle coil arrangement shown here defines ten different areas surrounded by coil windings.
  • Fig. 3 shows parts of an azimuthal position resolver according to an embodiment in a perspective, partially cut- away, view.
  • a rotor 1 is rotatable around axis 3.
  • Half of a stator 2 is cut-away giving sight into the interior of the azimuthal position resolver.
  • a loop 4 of magnetic material, marked by vertical hatching, extends around the rotor 1.
  • the stator 2 is arranged around the rotor 1 defining in some regions a narrow air gap 5.
  • the stator comprises a part of magnetic material marked by diagonal hatching in the cutting plane. This part of magnetic material guides the magnetic field generated by the exciting coil arrangement towards the regions of the loop 4 on the rotors being in the uppermost or lowermost axial position.
  • the magnetic part of the stator is formed as two concentric and axially spaced first 6' and 6' ' ring with and further ring in between them.
  • the rings 6, 6' ' - in upper and lower position in the present figure - have grooves 7 in axial direction defining protrusions 8 between them. Windings of saddle coils may be arranged in these grooves 7 and be wound around these protrusions 8, as representatively shown by the displayed saddle coil of the first measuring coil arrangement SI.
  • FIG. 4 shows a schematic functional diagram of an azimuthal position resolver.
  • a rotor 1 is rotatable around an axis 3, which her lies perpendicular to the figure.
  • the rotor comprises a magnetic part, which is not rotationally symmetric, here symbolized by the vertically hatched part. Note that in an azimuthal position resolver according to the invention, this part is the loop of magnetic material, the rotational asymmetry of which might not be visible in this particular view.
  • a stator 2 is arranged radially outside the rotor 1 and spaced from the rotor by an air gap 5 enabling a rotation of the rotor with respect to the stator.
  • the rotor modifies the inductive coupling between the exciting coil arrangement P and the first measuring coil arrangement SI, e.g. such that the coupling is proportional to cos ( ⁇ ) .
  • the rotor modifies the inductive coupling between the exciting coil arrangement P and the second measuring coil arrangement S2, e.g. such that the coupling is proportional to sin(9) .
  • An azimuthal position resolver may be seen as a variable reluctance transformer having as primary coil the exciting coil arrangement P and having at least two secondary coils, namely first and second
  • the rotor modulates the reluctance of each of a magnetic loop through the primary and each of the secondary coils according to its azimuthal position relative to the stator.
  • Fig. 5 shows a partially cut-away view of a rotor according to an embodiment.
  • a cross section through the rotor 1 is shown.
  • the lower half of the figure shows a view onto the rotor with hidden lines shown a dotted lines.
  • a ring groove extends around the rotor along a plane perpendicular to the axis 3.
  • the ring groove is completely in the loop of magnetic material.
  • the width of the groove, the width of the loop and the oblique angle, under which the plane defining the orientation of the loop cuts the axis 3 are combined such that the ring groove runs between the
  • the azimuthal orientation of the rotor as displayed in this figure is selected such that the extreme axial points of the loop 4 lie on the uppermost and lowermost rim.
  • Fig. 6 shows a partially cut-away view of a rotor according to an embodiment.
  • a cross section through the rotor 1 is shown.
  • an inner hollow cylinder 13 Similar to the embodiment shown in Fig. 5, an inner hollow cylinder 13, a first 11 and a second 12 axial positioning element, all made of non-magnetic material and marked by diagonal hatching in the cross-section, hold in place a ring 4 made of magnetic material and marked by horizontal hatching.
  • a sleeve 15 of non-magnetic material is in contact with an outer
  • the sleeve 15 sits on the outermost radius of the rotor.
  • the sleeve shown here is a hollow cylindrical sleeve. It may e.g. comprise titanium or a titanium alloy.
  • the lower half of the figure shows a view onto the rotor with hidden lines shown a dotted lines.
  • Fig. 7 shows in Fig. 7. a) to 7.d) in schematic flattened views four variants of elementary building blocks of coils windings that may be used to build various of the embodiments.
  • projections 8, around which coil windings may be wound, are schematically
  • projections belonging to one ring are arranged in a
  • a neighboring coil winding may continue directly continue. Alternatively, such free ends may lead to a region outside the coil winding region and be
  • Fig. 7. a) shows a coil winding 9 defining a saddle coil around a single projection 8 in azimuthal direction a on the first ring 6' and around a corresponding projection on the second ring 6' ' .
  • the number of windings of such a coil winding may be selected according to the azimuthal position of the coil winding in order to approximate a sine or cosine distribution according to an embodiment.
  • a coil winding of the type shown here may have an opening angle of 120° in azimuthal direction, if the single projection around which it is wound covers a third of the circumference.
  • the type of coil winding shown in Fig. 7. a) may be used as building block in the first and second measuring coils arrangements of embodiments of the invention .
  • Fig. 7.b shows a coil winding 9 defining a saddle coil around a several, in the case shown, around four
  • a coil winding of the type shown here may have an opening angle of 120° in azimuthal direction, if there are twelve projections along the circumference of each ring.
  • the type of coil winding shown in Fig. 7.b) may be used as building block in the first and second measuring coils arrangements of embodiments of the invention.
  • Fig. 7.c shows two coil windings 9 defining a separate saddle coil around single projections 8, one of the coil windings being arranged on the first ring 6' only and the other being on the second ring 6' ' only. This type of coil windings is useful if first and second ring carrying respective coil windings are built as prefabricated
  • individual projection may be selected such that a sine to cosine distribution is approximated, as defined in an embodiment.
  • the type of coil winding shown in Fig. 7.c) may be used as building block in the first and second measuring coils arrangements of embodiments of the invention as well as building blocks of an exciting coil arrangement.
  • the coil winding 9 on the first 6' and the second 6' ' ring may be connected in series with respective polarities, such that the generated radial magnetic flux on one ring points outward and on the other ring points inward.
  • the number of windings around the single projections may be equal on all projections carrying coil windings.
  • all projections may carry coil windings being connected in series to form an embodiment of the exciting coil
  • Fig. 7.d shows two coil windings 9 each defining a
  • a coil winding of the type shown here may have an opening angle of 120° in azimuthal direction, if there are twelve projections along the circumference of each ring. This type of coil windings is useful if first and second ring carrying respective coil windings are built as
  • Fig. 7.c The type of coil winding shown in Fig. 7.c) may be used as building block in the first and second measuring coils arrangements of embodiments of the invention as well as building blocks of an exciting coil arrangement of embodiments of the invention.
  • Fig. 8. a) shows schematically, in a flattened view, a first measuring coil arrangement SI having saddle coils defining areas Ai , A 2 , each area being surrounded by a number n' i , n' 2 of coil windings approximating a multiple of the sine of the azimuthal position of the respective area.
  • Such an arrangement of saddle coils may e.g. be built by using building blocks as shown in any of the figures Fig. 7. a) to Fig. 7.d) . Different numbers of coil windings are
  • Fig. 8.b shows for an embodiment having twelve possible positions on the circumference the numbers of coil
  • Numbers n'i, n' 2 , n ' 12 denote the numbers of coil windings of the saddle coils at each of the twelve azimuthal positions of a first measuring coil arrangement SI having saddle coils as shown in Fig. 8. a) .
  • Fig. 8.c shows the sine and cosine functions of azimuthal position a multiplied by the factor 50. By rounding the values of these functions read at the twelve vertical grid lines to whole numbers, the numbers of coil windings as shown in Fig. 8.b) can be obtained. Note that position 0 corresponds to position 12, i.e. to the azimuthal position 0° being equal to the azimuthal position 360°.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

Un résolveur de position azimutale 10 comprend un rotor 1 pouvant tourner autour d'un axe 3 par rapport à un stator 2, ledit rotor comprenant au moins une boucle 4 de matériau magnétique s'étendant autour dudit axe et agencée selon un plan géométrique coupant ledit axe sous un angle oblique et une rainure annulaire 14 le long d'un plan perpendiculaire audit axe et complètement à l'intérieur de ladite boucle ; ledit stator comprenant un agencement de bobine d'excitation P générant un champ magnétique H entrant dans ladite boucle 4, se propageant le long d'au moins une partie de ladite boucle et émanant à partir de ladite boucle, un premier agencement de bobine de mesure S1 comportant au moins une première bobine de selle orientée vers ledit axe et un second agencement de bobine de mesure S2 comportant au moins une seconde bobine de selle orientée vers ledit axe. L'invention concerne en outre un agencement de mesure de position azimutale et un procédé de production d'un signal faisant état d'une position azimutale.
PCT/EP2016/082621 2016-12-23 2016-12-23 Résolveur WO2018114006A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/082621 WO2018114006A1 (fr) 2016-12-23 2016-12-23 Résolveur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/082621 WO2018114006A1 (fr) 2016-12-23 2016-12-23 Résolveur

Publications (1)

Publication Number Publication Date
WO2018114006A1 true WO2018114006A1 (fr) 2018-06-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210891A (en) * 1978-11-20 1980-07-01 Boushey Homer A Electromagnetic position indicator/differential transformer
EP0174290A1 (fr) * 1984-08-21 1986-03-12 Resolvex, Inc. Structure magnétique d'un synchro et tachymètre
US6518752B1 (en) * 1991-03-22 2003-02-11 Walter Wyss Resolver for measuring and determining angular positions or revolutions of a shaft
JP2010216844A (ja) * 2009-03-13 2010-09-30 Minebea Co Ltd レゾルバ
US20130187586A1 (en) * 2008-06-04 2013-07-25 James F. Murray, III Multi-Pole Switched Reluctance D.C. Motor with a Constant Air Gap and Recovery of Inductive Field Energy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210891A (en) * 1978-11-20 1980-07-01 Boushey Homer A Electromagnetic position indicator/differential transformer
EP0174290A1 (fr) * 1984-08-21 1986-03-12 Resolvex, Inc. Structure magnétique d'un synchro et tachymètre
US6518752B1 (en) * 1991-03-22 2003-02-11 Walter Wyss Resolver for measuring and determining angular positions or revolutions of a shaft
US20130187586A1 (en) * 2008-06-04 2013-07-25 James F. Murray, III Multi-Pole Switched Reluctance D.C. Motor with a Constant Air Gap and Recovery of Inductive Field Energy
JP2010216844A (ja) * 2009-03-13 2010-09-30 Minebea Co Ltd レゾルバ

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