DE2931382A1 - SHORT RING SENSOR - Google Patents

SHORT RING SENSOR

Info

Publication number
DE2931382A1
DE2931382A1 DE19792931382 DE2931382A DE2931382A1 DE 2931382 A1 DE2931382 A1 DE 2931382A1 DE 19792931382 DE19792931382 DE 19792931382 DE 2931382 A DE2931382 A DE 2931382A DE 2931382 A1 DE2931382 A1 DE 2931382A1
Authority
DE
Germany
Prior art keywords
sheet
iron
lamellas
encoder according
iron core
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.)
Ceased
Application number
DE19792931382
Other languages
German (de)
Inventor
Guenter Ing Grad Gerlach
Guenter Kiefer
Karl-Otto Dipl Ing Dr Linn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19792931382 priority Critical patent/DE2931382A1/en
Priority to FR8016734A priority patent/FR2462762A1/en
Priority to IT23886/80A priority patent/IT1132295B/en
Publication of DE2931382A1 publication Critical patent/DE2931382A1/en
Ceased legal-status Critical Current

Links

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
    • G01D5/2006—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 self-induction of one or more coils
    • G01D5/202—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 self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • G01D5/2026—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 self-induction of one or more coils by movable a non-ferromagnetic conductive element constituting a short-circuiting element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B17/00—Screening
    • G12B17/02—Screening from electric or magnetic fields, e.g. radio waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Description

56085608

1-9.7.1979 Lr/Sm1-9.7.1979 Lr / Sm

ROBERT BOSCH GMBH3 7OOQ Stuttgart 1ROBERT BOSCH GMBH 3 7OOQ Stuttgart 1 Kurzschlußring-GeberShort-circuit ring encoder

Die Erfindung betrifft einen Kurzschlußring-Geber mit einem aus Blechlamellen zu einem Paket geschichteten Eisenkern.The invention relates to a short-circuit ring transmitter with an iron core layered from sheet metal lamellas to form a package.

Derartige Geber sind beispielsweise aus der DE-AS 23 52 851 (G Ol D 5/20) bekannt. Bei diesen Gebern wird die Induktivität einer auf dem Eisenkern sitzenden Wicklung in Abhängigkeit von dem Verstellweg eines den Eisenkern umgreifenden Ringes verändert. Diese Induktivitätsänderungen können durch frequenzanaloge, taktanaloge oder amplitudenanaloge Auswerteschaltungen ermittelt werden. Die Auswertung kann jedoch davon beeinflußt werden, daß störende Magnetfelder den Eisenkern bzw. dessen Wicklung durchsetzen.Such donors are for example from DE-AS 23 52 851 (G Ol D 5/20) known. With these encoders, the inductance of a winding on the iron core is dependent changed by the adjustment path of a ring encompassing the iron core. These changes in inductance can be achieved by frequency-analog, clock-analog or amplitude-analog evaluation circuits are determined. The evaluation can, however, be influenced by this that disturbing magnetic fields penetrate the iron core or its winding.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Kurzschlußring-Geber der eingangs beschriebenen Art dafür zu sorgen, daß derartige Störfelder die Auswertung nicht beeinträchtigen können. Erfindungsgemäß ist vorgesehen, daß der Eisenkern mindestens auf einem Teil seiner Außenflächen eine Abschirmung aus elektrisch gut leitendem Werkstoff, insbesondere aus Kupfer, Aluminium, Messing oder Eisen trägt.The invention is based on the object of a short-circuit ring encoder of the type described above to ensure that such interference fields do not impair the evaluation can. According to the invention it is provided that the iron core At least on part of its outer surfaces a shield made of a material with good electrical conductivity, in particular made of Carries copper, aluminum, brass or iron.

..12..12

1.30009/00841.30009 / 0084

R. 5608 Lr/SmR. 5608 Lr / Sm

Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen in Verbindung mit den nachstehend beschriebenen und in der Zeichnung dargestellten Ausführungsbeispielen. Further refinements of the invention emerge from the subclaims in connection with those described below and the exemplary embodiments shown in the drawing.

Der in Figur 1 in seiner Ansicht und in Figur 2 in einem nach der Linie II-II in Figur 1 geführten Querschnitt dargestellte, U-förmige Eisenkern ist aus mehreren gestanzten Blechlamellen 1 aufgebaut, die zu einem Paket übereinandergeschichtet sind. Auf die jeweils äußersten, in der Zeichnung nicht näher bezeichneten Eisenblechlamellen 1 ist jeweils ein Abschirmblech 2 bzw. 3 aufgelegt, das mit der gleichen Kontur wie die Eisenblechlamellen 1 aus einem Kupfer- oder Aluminiumblech oder einem anderen, gut leitenden Werkstoff gestanzt ist. Um die äußeren Kanten des so erzeugten Pakets ist eine durchgehendeTQammer 5 geschlagen, die mit ihren Randzonen 6 und auf den Abschirmblechen 2 bzw. 3 aufliegt.The one shown in Figure 1 in its view and in Figure 2 in a cross section along the line II-II in Figure 1, The U-shaped iron core is made up of several stamped sheet metal lamellas 1, which are layered on top of one another to form a package are. On each of the outermost sheet iron lamellas 1, not shown in detail in the drawing, there is a shielding plate 2 or 3 placed, with the same contour as the sheet iron lamellas 1 made of a copper or aluminum sheet or another, highly conductive material is punched. There is a continuous TQammer around the outer edges of the package created in this way 5 beaten, which rests with its edge zones 6 and on the shielding plates 2 and 3, respectively.

Beim zweiten Ausführungsbeispiel, welches in Figur 3 in einem gemäß der Linie III-III in Figur 1 geführten Querschnitt dargestellt ist, sind anstelle der aus Figur 2 erkennbaren Abschirmbleche 2 und 3 die Randzonen 8 und 9 einer Kupfer- oder Aluminiumklammer 10 so breit gehalten, daß diese Randbereiche die äußersten Eisenblechlamellen 1 vollständig abdecken.In the second exemplary embodiment, which is shown in FIG. 3 in a cross section along the line III-III in FIG is shown, instead of the shielding plates 2 and 3 which can be seen from FIG. 2, the edge zones 8 and 9 are one Copper or aluminum clip 10 held so wide that these edge areas completely cover the outermost sheet iron lamellas 1 cover.

Durch die erfindungsgemäße Abschirmung aus elektrisch gut leitendem Werkstoff wird folgendes erreicht:Due to the shielding according to the invention from electrically good conductive material, the following is achieved:

a) Die Umwelteinflüsse, insbesondere durch metallische Gehäuse und Befestigungen werden auf ein nicht störendes Minimum reduziert;a) The environmental influences, in particular due to metallic housings and fastenings, are not disruptive Minimum reduced;

b) das Paketieren der Eisenbleche wird vereinfacht, wobei das seither übliche, aufwendige Verkleben der einzelnen Eisenbleche entfallen kann;b) the packaging of the iron sheets is simplified, with the complex gluing of the individual iron sheets that has been customary since then can be omitted;

130009/0084 ../3130009/0084 ../3

- y - R. 5608- y - R. 5608

Lr/SmLr / Sm

c) bei Kurzschlußring-Gebern mit U-förmigen Eisenkernen der in der Zeichnung dargestellten Art wird - wegen der Reduzierung des Streuflusses infolge der Abschirmung - die Linearität des Zusammenhangs zwischen dem Verstellweg des Kurzschlußringes und der Änderung der Induktivität wesentlich verbessert.c) in the case of short-circuit ring encoders with U-shaped iron cores of the type shown in the drawing - because of the reduction of the leakage flux as a result of the shielding - the linearity of the relationship between the adjustment path of the Short-circuit ring and the change in inductance significantly improved.

In Abwandlung des Ausführungsbeispieles nach Figur 3 kann statt einer Klammer 5 und zweier Deckbleche 2 und 3 - wie sie in Figur 2 vorgesehen sind - die klammerförmige Abschirmung 10 durch Flammspritzen aus einem metallischen Auftrag hergestellt werden.In a modification of the embodiment of Figure 3 can instead of a clamp 5 and two cover plates 2 and 3 - as provided in FIG. 2 - the clamp-shaped shield 10 can be produced by flame spraying from a metallic order.

130009/0084130009/0084

LeerseiteBlank page

Claims (5)

R.56O8
19.7.-1979 Lr/SmR.56O8
19.7.-1979 Lr / Sm ROBERT 30SCH GMBH, 7OOO Stuttgart 1ROBERT 30SCH GMBH, 7OOO Stuttgart 1 AnsDrücheTo push I., Kurzschlußring-Geber mit einem aus Blechlamellen zu einem Paket geschichteten Eisenkern, dadurch gekennzeichnet, daß der Eisenkern an mindestens einem Teil seiner Außenflächen eine Abschirmung (2 bis 7 bzw. 8 bis 10) aus elektrisch gut leitendem Werkstoff trägt. I., short-circuit ring encoder with an iron core layered from sheet metal lamellas to form a package, characterized in that the iron core has a shield (2 to 7 or 8 to 10) made of a highly electrically conductive material on at least part of its outer surfaces. 2. Geber nach Anspruch 1, dadurch gekennzeichnet, daß die Abschirmung aus Cu, Al, Messing oder Fe besteht.2. Encoder according to claim 1, characterized in that the Shielding consists of Cu, Al, brass or Fe. 3. Geber nach Anspruch 2, dadurch gekennzeichnet, daß auf wenigstens eine der beiden äußersten Eisenblechlamellen ein Cu- oder Al-Blech (2, 3) aufgelegt ist.3. Encoder according to claim 2, characterized in that on At least one of the two outermost sheet iron lamellas has a Cu or Al sheet (2, 3) placed on it. ..12..12 130009/0084130009/0084 - 2 - R. 5608- 2 - R. 5608 Lr /SmLr / Sm 4. Geber nach Anspruch 3j dadurch gekennzeichnet, daß das Cu- oder Al-Blech (2, 3) die gleiche Kontur wie die Eisenblechlamellen (1) hat.4. Encoder according to claim 3j, characterized in that the Cu or Al sheet (2, 3) have the same contour as the sheet iron lamellas (1) has. 5. Geber nach einem der Ansprüche 2 bis H, dadurch gekennzeichnet, daß das Blechpaket durch eine Klammer (5 bzw. 10) aus Cu oder Al zusammengehalten ist.5. Encoder according to one of claims 2 to H, characterized in that the laminated core is held together by a clamp (5 or 10) made of Cu or Al. 130009/0084130009/0084
DE19792931382 1979-08-02 1979-08-02 SHORT RING SENSOR Ceased DE2931382A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19792931382 DE2931382A1 (en) 1979-08-02 1979-08-02 SHORT RING SENSOR
FR8016734A FR2462762A1 (en) 1979-08-02 1980-07-29 Short circuit ring transducer with laminated iron core - has plate end electrically conducting screening to suppress stray field effects
IT23886/80A IT1132295B (en) 1979-08-02 1980-08-01 SHORT CIRCUIT RING TRANSDUCER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792931382 DE2931382A1 (en) 1979-08-02 1979-08-02 SHORT RING SENSOR

Publications (1)

Publication Number Publication Date
DE2931382A1 true DE2931382A1 (en) 1981-02-26

Family

ID=6077467

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792931382 Ceased DE2931382A1 (en) 1979-08-02 1979-08-02 SHORT RING SENSOR

Country Status (3)

Country Link
DE (1) DE2931382A1 (en)
FR (1) FR2462762A1 (en)
IT (1) IT1132295B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179298A1 (en) * 1984-10-09 1986-04-30 Viggo Berthelsen A method of eliminating the influence on one or more persons or animals from a magnetic field generating source and a device for eliminating such influence

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009625A1 (en) * 1980-03-13 1981-09-24 Robert Bosch Gmbh, 7000 Stuttgart SHORT RING ENCODER
FR2655475B1 (en) * 1989-12-01 1992-02-21 Orega Electro Mecanique SHIELDING DEVICE FOR A CUT-OUT POWER TRANSFORMER.
JP3311391B2 (en) * 1991-09-13 2002-08-05 ヴィエルティー コーポレーション Leakage inductance reducing transformer, high frequency circuit and power converter using the same, and method of reducing leakage inductance in transformer
DE9310119U1 (en) * 1993-07-07 1993-09-09 Werner Turck Gmbh & Co Kg, 58553 Halver Mounting base for an inductive proximity switch
DE69631462D1 (en) * 1995-11-27 2004-03-11 Vlt Corp Plating permeable cores

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1765443A (en) * 1928-02-25 1930-06-24 Rca Corp Shielding
DE1724585U (en) * 1956-04-26 1956-06-21 Max Grundig MAGNETIZING HEAD.
DE1779492A1 (en) * 1968-08-19 1971-11-04 Manfred Roser Device for lining up and transferring hangers carrying curtains onto curtain rails
DE1489968B2 (en) * 1965-04-23 1972-06-22 Haufe, Dipl Ing Hellmut, 6390Usingen MAGNETIC SHIELDING FOR ELECTRICAL COMPONENTS, IN PARTICULAR TRANSFORMERS, TRANSFORMERS OR DGL.
DE2352851B2 (en) * 1973-10-22 1978-02-16 Robert Bosch Gmbh, 7000 Stuttgart INDUCTIVE ENCODER OR ROTARY ANGLE ENCODER

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1765443A (en) * 1928-02-25 1930-06-24 Rca Corp Shielding
DE1724585U (en) * 1956-04-26 1956-06-21 Max Grundig MAGNETIZING HEAD.
DE1489968B2 (en) * 1965-04-23 1972-06-22 Haufe, Dipl Ing Hellmut, 6390Usingen MAGNETIC SHIELDING FOR ELECTRICAL COMPONENTS, IN PARTICULAR TRANSFORMERS, TRANSFORMERS OR DGL.
DE1779492A1 (en) * 1968-08-19 1971-11-04 Manfred Roser Device for lining up and transferring hangers carrying curtains onto curtain rails
DE2352851B2 (en) * 1973-10-22 1978-02-16 Robert Bosch Gmbh, 7000 Stuttgart INDUCTIVE ENCODER OR ROTARY ANGLE ENCODER

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Ältere Anmeldung, veröffentlicht als DE-AS 29 14 195 *
Richter, O., v.Voss, R.: Bauelemente der Feinmechanik, 4. Aufl., Berlin NW7 1949, Verlag Technik GmbH, S. 109, 110 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179298A1 (en) * 1984-10-09 1986-04-30 Viggo Berthelsen A method of eliminating the influence on one or more persons or animals from a magnetic field generating source and a device for eliminating such influence

Also Published As

Publication number Publication date
FR2462762B3 (en) 1982-07-02
FR2462762A1 (en) 1981-02-13
IT1132295B (en) 1986-07-02
IT8023886A0 (en) 1980-08-01

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8131 Rejection