WO2011035802A1 - Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique - Google Patents

Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique Download PDF

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Publication number
WO2011035802A1
WO2011035802A1 PCT/EP2009/062224 EP2009062224W WO2011035802A1 WO 2011035802 A1 WO2011035802 A1 WO 2011035802A1 EP 2009062224 W EP2009062224 W EP 2009062224W WO 2011035802 A1 WO2011035802 A1 WO 2011035802A1
Authority
WO
WIPO (PCT)
Prior art keywords
resolver
magnetic
resolver according
soft
winding
Prior art date
Application number
PCT/EP2009/062224
Other languages
German (de)
English (en)
Inventor
Markus Reinhard
Jürgen SCHIMMER
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/EP2009/062224 priority Critical patent/WO2011035802A1/fr
Priority to EP09783253A priority patent/EP2480864A1/fr
Publication of WO2011035802A1 publication Critical patent/WO2011035802A1/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
    • G01D5/204—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 by influencing the mutual induction between two or more coils
    • G01D5/2046—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 by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn

Definitions

  • the invention relates to a resolver for detecting a rotational angle of an axis according to the preamble of patent claim 1 and a method for field-oriented control of an electrical machine according to claim 12
  • Resolvers are often preferred over other systems because they are very robust; For brushless devices, only the bearings, if any, are subject to wear. The accuracy is sufficient for many applications.
  • the main applications are machines in the mining industry, in the textile industry and other industries ⁇ in which optical position encoder (incremental encoder) may have due to contamination problems.
  • optical position encoder increasing encoder
  • incremental encoders still have problems with the lifespan of the LEDs.
  • the operation of a conventional resolver based on the transmission of electrical energy from the stator to the rotor by a magnetic field of a coil and by the formation of the signal magnetic poles on the rotor through current-carrying windings.
  • Today's resolvers (rotor energized) consist of a fixed part, the stator or stator, and a (rotating) part, the rotor or rotor.
  • the stand generally carries three windings.
  • the runner usually wears two windings.
  • a sinusoidal signal (usually about 5 V amplitude at eini ⁇ gen kHz frequency) is fed.
  • This signal induces a likewise sinusoidal voltage in ei ⁇ ne cylinder winding on the rotor transformer.
  • the cylindrical windings ste ⁇ hen thereby separated by the air gap directly Compared with.
  • the voltage induced in the rotor winding (rotor-side cylinder winding) is applied to the second rotor winding.
  • This second winding is not a cylindrical winding around the circumference of the rotor, but a more complex winding around teeth of electrical steel. Due to the alternating opposing winding of the teeth, they represent magnetic north and south poles alternately at a current through the winding and depending on the phase position of the Er ⁇ regersignals.
  • the other two stator windings (often referred to as "sinusoidal track” and “cosine track”) have the same structure and are arranged offset by 90 ° to each other. In these two windings, the magnetic north and south poles each induce a voltage. These stresses are modulated by the rotation. The result is a sinusoidal envelope.
  • these same envelope curves in the two stator windings also have an offset of 90 ° electrically.
  • demodulating the signals in the two stator windings can be closed to the rotor position.
  • the direction of rotation and the speed can be determined.
  • a runner of a prior art resolver includes a sleeve of non-magnetic material (aluminum, stainless steel, ...); this carries a structure made of electrical steel for mounting take the winding.
  • the bleached iron has a good ⁇ ⁇ to form the magnetic field.
  • This "ge ⁇ forked out iron” is relatively expensive to produce
  • the sheet stack to be packaged Back coating, welding, riveting or pressing plates;.. All of these methods are complicated, expensive, and have various disadvantages
  • a bore in the sleeve is used to hold whose rotational movement is to be detected of the shaft. at one end of the rotor, the cylinders winding is applied.
  • a central idea of the invention lies in the substitution of the cost-intensive windings of the laminated rotor and the sleeve carrying these windings by components made of a soft magnetic material, whereby the rotor can be designed without lamination and without windings.
  • the leadership of the magnetic field by a magnetic circuit is new.
  • the fixed part of the resolver according to the invention is constructed analogously to that of a resolver from the prior art, so that the stator and the associated evaluation unit can be adopted substantially unchanged.
  • a resolver for detecting a rotation angle of an axis, in particular the axis of an electrical machine, with a fixed part with at least two signal windings for detecting at least one by a rotation of the axis modulated magnetic field, and with a third winding for generating a force acting on at least two components of a rotating part Magneti ⁇ rule field.
  • a part of the magnetic field generated by the third winding is at least directly by a respective soft magnetic member of the rotating part, ie without an intermediate conversion of the energy of the alternating magnetic field into electrical energy and vice ⁇ versa, in the axial direction to each of the signal Guided windings.
  • a quadrature signal (orthogonal signal pair) comprises the rotating part while two match each other configured soft magnetic ⁇ mechanical components wherein each of the at least two soft magnetic ⁇ rule components of transferring a portion of the magnetic field to each of the two signal Windings of fixed ⁇ standing part is provided.
  • the resolver proposed here can be produced at lower cost than conventional resolvers. The complex and expensive windings on the rotor for the formation of the mutual magnetic south and north poles and energy transfer can be saved. In addition, such a resolver is more reliable than the known arrangement.
  • the stand of the resolver proposed here is not necessarily changed in comparison to the prior art, ie that for such a resolver the fixed part can be reused from a device according to the state of the art; this also applies to the electronics and data processing for signal evaluation.
  • the solution of the task further provides a method for field-oriented control of an electrical machine, wherein an inventive resolver is used to detect a required for the field or camp-oriented Regi ⁇ ment information about the rotation angle and / or the rotational speed of the electric machine.
  • the required information can thus be obtained by a cost-effective and reliable device.
  • the at least two soft magnetic compo ⁇ le in an axial portion which is arranged in the detection range of at least one of the signal windings, each rotationally asymmetric configured for rotation angle-dependent modulation of the at least one sensor winding conducting magnetic field; in particular, in that the components have a radial profile of the type or the like of a claw-pole rotor at least at this end.
  • a compact design is achieved by the at least two soft magnetic components are mounted at least partially inserted into each other in the axial direction.
  • a magnetic insulating layer is vorgese ⁇ hen between the at least two weichmag ⁇ netic components. If the soft-magnetic component is composed of a substantially non-magnetic material are embedded in said soft magnetic ⁇ cal particles, inexpensive, and vative in ⁇ manufacturing processes, such as can the injection molding are used, in particular, provided that the substantially non-magnetic material is a plastic or a Ceramics is.
  • a frequent application is supported by the resolver according to the invention, when the component is applied non-positively on the shaft of an electrical machine.
  • Figure 1 shows an inner cylinder of the rotating part of a
  • Figure 2 shows an outer cylinder of the rotating part of a
  • Resolvers with, for example, four axially projecting teeth
  • FIG. 3 shows a partially assembled state of the inner and outer cylinders (pushed into one another);
  • FIG. 4 shows a third cylinder for the rotating part of a resolver for aligning the outer circumference of the inner cylinder with the outer circumference of the outer cylinder
  • Figure 6 is a schematic representation of a resolver ge ⁇ Josess the prior art
  • Figure 7 is a schematic diagram of the resolver according to the
  • FIG. 6 schematically shows a prior art resolver.
  • a sinusoidal excitation voltage VE is induced by a field winding R1R2.
  • An applied on the axis of rotation RA of the resolver second winding (in Fig. 6 arranged on the left) is thus on the rotating transformer RTR with a frequency and in phase equal to exciter voltage VE voltage formed VR and a resulting excitation current supplied, whereby in two stator side angeord ⁇ Neten sensor windings S1S3 and S2S4, which are mutually orthogonal, the signal voltages VI, V2 are induced.
  • FIG. 7 shows a schematic equivalent circuit diagram of this arrangement.
  • FIG. 5 completely and in the Figures 1, 2 and 4 rotor LAD ⁇ pelt, the magnetic field of the cylindrical stator winding R1R2 such into two magnetically highly conductive components IZ, AZ, the inner cylinder IZ and the outer cylinder AZ, that results in a magnetic north and south pole; North and South ⁇ pole change in each case according to the frequency of the excitation voltage Ve.
  • the field or the resulting magnetic flux (flooding) is then passed through the components in each axia- 1er direction.
  • the components IZ, AZ are kon ⁇ ted in that the crenellations / teeth located at the other end serving as magnetic poles;
  • FIG. 1 shows the claw-shaped teeth KIZ of the inner cylinder.
  • FIG 2 is shown as a second soft-magnetic component of the outer cylinder AZ with the likewise claw-shaped teeth KAZ.
  • the components IZ, AZ for example, consist of injection-molded plastic, in the soft magnetic particles (eg iron filings) with Kitlas ⁇ sen are.
  • These SMC components Soft Magnetic Composite
  • SMC are electrically non-conductive (to suppress eddy currents) and easy to produce on injection molding machines.
  • ferrite material or ceramic-bonded iron could also be used.
  • a magnetic insulating layer ensures that the field lines penetrating into the rotor in the area of the field winding R1R2 essentially run within the components IZ, AZ and only emerge at the teeth KIZ, KAZ.
  • the insulating layer is formed either by a further component imple- mented, or directly during the molding process with injection-molded, for example, a layer of plastics are applied without iron ⁇ particle during spraying of the parts.
  • the resolver is designed so that the components IZ, AZ can be inserted into each other after the injection process;
  • FIG. 4 In order to achieve uniform flooding in the resolver according to the invention, either a third cylinder H shown in FIG. 4 is used, or the cylindrical winding in the stator is wound with a tapered inner diameter. This results in a mounted complete component, which is in the figure 5 Darge ⁇ is.
  • the parts are essentially of cylindrical form, each with an internal bore.
  • Cylinder except for the region of the teeth KIC so- ⁇ selected such that it fits AZ in the bore of the outer cylinder.
  • the inner diameter of the inner cylinder IZ is selected so that it forms, for example, a slight interference fit with the shaft of a motor or of another component whose rotational movement is to be detected.
  • the components IZ, AZ, H must be firmly connected. This can be done by a suitable choice of fit or the use of adhesive.
  • the width of the teeth KIZ, KAZ and the intervening recesses is chosen so that always one tooth of the outer and a tooth of the inner ring alternately juxtaposed; possibly with the intervening magnetic insulating layer. So that the teeth KIZ of the inner cylinder extend radially as far outward as those of the outer cylinder, the teeth KIZ of the inner cylinder extend radially as far outward. that they span the same outer diameter as the outer cylinder AZ.
  • the inner cylinder IZ is slightly longer (in this case by half of the excitation device) than the outer cylinder AZ, so that the half of the end facing the exciting coil has only the outer diameter of the inner cylinder. This can be seen in the right part of FIG. When excited by a homogeneous field of a ring coil of the stator, this would lead to the inner cylinder IZ being flooded by fewer field lines than the outer cylinder AZ. Therefore, after the assembly of the two cylinders IZ, AZ on the inner cylinder IZ nor the annular sleeve H, in Figure 4 represents, for example, sprayed or plugged SMC material. The thus mounted rotor has a constant diameter over the entire length.
  • This third cylinder H can alternatively be saved by the use of plastic with higher iron filling in the inner cylinder IZ.
  • the magnetically insulating layer between the Zy ⁇ lindern IZ, AZ should prevent a magnetic closure in the field of excitement, no insulation may take place between the sleeve H and the inner cylinder IZ. On the contrary, it is important here to ensure good magnetic conductivity.
  • the inner cylinder IZ and the sleeve H of magnetically conductive material better than the outer cylinder AZ. This can also compensate for the disadvantage of the radial extension of the teeth KIZ. Is the shaft on which the components IZ, AZ, H are mounted, made of ferromagnetic material, must Zvi ⁇ rule the shaft and the inner cylinder IZ also a magnetic insulation are introduced. If a current is impressed into the cylindrical winding R1R2 in the stator, depending on the polarity of the current, a magnetic north pole forms on one side and a south pole on the other side.

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

Abstract

L'invention concerne un résolveur permettant de détecter un angle de rotation (V) d'un axe (RA), notamment de l'axe (RA) d'un moteur électrique, comprenant une partie fixe pourvue d'au moins deux bobines de signal (S1S3, S2S4) pour détecter au moins un champ magnétique modulé par une rotation de l'axe (RA), et une troisième bobine (R1R2) pour générer un champ magnétique agissant sur au moins un élément (IZ, AZ) d'une partie tournante, au moins une partie du champ magnétique généré par la troisième bobine (R1R2) étant guidé par au moins deux éléments magnétiques doux (IZ, AZ) de la partie tournante directement vers une de ces deux bobines de signal (S1S3, S2S4) de la partie fixe. Un tel résolveur se présente sans bobines du côté rotor et est par conséquent robuste et facile à fabriquer.
PCT/EP2009/062224 2009-09-22 2009-09-22 Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique WO2011035802A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2009/062224 WO2011035802A1 (fr) 2009-09-22 2009-09-22 Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique
EP09783253A EP2480864A1 (fr) 2009-09-22 2009-09-22 Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/062224 WO2011035802A1 (fr) 2009-09-22 2009-09-22 Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique

Publications (1)

Publication Number Publication Date
WO2011035802A1 true WO2011035802A1 (fr) 2011-03-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/062224 WO2011035802A1 (fr) 2009-09-22 2009-09-22 Résolveur permettant de détecter un angle de rotation d'un axe et procédé de réglage à orientation de champ d'un moteur électrique

Country Status (2)

Country Link
EP (1) EP2480864A1 (fr)
WO (1) WO2011035802A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866312A1 (fr) * 1997-03-18 1998-09-23 Mecagis Capteur de position angulaire et ses applications
EP1351372A1 (fr) * 2002-03-14 2003-10-08 Precilec Capteur angulaire inductif de type synchro resolver
DE10309722A1 (de) * 2003-03-06 2004-10-14 Robert Bosch Gmbh Einrichtung zur Transformationswinkelermittlung bei elektrischen Maschinen
FR2854456A1 (fr) * 2003-05-02 2004-11-05 Precilec Capteur inductif de position angulaire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0866312A1 (fr) * 1997-03-18 1998-09-23 Mecagis Capteur de position angulaire et ses applications
EP1351372A1 (fr) * 2002-03-14 2003-10-08 Precilec Capteur angulaire inductif de type synchro resolver
DE10309722A1 (de) * 2003-03-06 2004-10-14 Robert Bosch Gmbh Einrichtung zur Transformationswinkelermittlung bei elektrischen Maschinen
FR2854456A1 (fr) * 2003-05-02 2004-11-05 Precilec Capteur inductif de position angulaire

Also Published As

Publication number Publication date
EP2480864A1 (fr) 2012-08-01

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