GB1391669A - Position-measuring transformer - Google Patents
Position-measuring transformerInfo
- Publication number
- GB1391669A GB1391669A GB3038172A GB3038172A GB1391669A GB 1391669 A GB1391669 A GB 1391669A GB 3038172 A GB3038172 A GB 3038172A GB 3038172 A GB3038172 A GB 3038172A GB 1391669 A GB1391669 A GB 1391669A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- coupling
- windings
- sections
- sine
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
- H01F29/12—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable coil, winding, or part thereof; having movable shield
-
- 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
- G01D5/2073—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 movement of a single coil with respect to two or more coils
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Coils Of Transformers For General Uses (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
1391669 Displacement transducers INDUCTOSYN CORP 29 June 1972 [15 March 1972] 30381/72 Heading G1N [Also in Division H 1] A position-measuring transformer has first, 2, and second, 6, relatively movable windings, the second winding being formed of two seriesconnected winding sections comprising continuous printed conductors inductively coupling to the first winding and arranged so that an unwanted coupling component in the first winding section cancels out an unwanted coupling component in the second winding section. Constant Coupling Cancellation. As shown in Fig. 1, member 6 has a first winding section having active conductor portions 18-1 to 18-6 and end portions 16-1 to 16-6. The second winding section has active portions 19-1 to 19-6 and end portions 17-1 to 17-6. The portions 18-and 19- conduct in the same direction, but the end portions 16- and 17- conduct in opposite directions so that their coupling to the reference winding 2 is zero. Quadrature Compensation. Fig.7 shows series connected winding sections C and B forming a sine winding, and series-connected winding sections A and D forming a cosine winding. Each pair of windings exhibits cancellation of constant coupling, and it is shown that if the angles α 1 and α 2 between the windings are the same then the use of two windings for each phase member ensures that the coupling signals are exactly in quadrature even when α 1 and α 2 are not exactly 90 degrees. The winding sections may be placed in four separate layers, or the sine windings may be in one layer, with the cosine windings in another. Further accuracy can be obtained by placing resistors across one or more of the winding sections. For example, a resistor across winding section A reduces the coupling of that section and reduces the angle between the sine and cosine windings; a resistor across winding section D increases the angle. Coupling Equalization and Harmonic Cancellation. It is stated that if the active conductor portions have a width twice that of the width of the spaces between them, then errors due to coupling of the third harmonic of the fundamental frequency are obviated. Alternatively, since the magnitude of coupling is dependent on the conductor to space width ratio, this ratio can be made smaller for the winding sections furthest from the reference member so that the magnitude of coupling is the same for all winding sections. As described the ratios for the winding sections C and A, and for the winding sections B and D are made the same, and are arranged so that the average ratios for the sine winding C and B and for the cosine winding A and D are both 2 to 1, allowing cancellation of third harmonic errors. Further coupling equalization or line balancing may be achieved by placing a resistor across the sine or cosine winding and thereby reducing that winding's coupling to the reference member. Construction and Arrangements. A four layer linear transformer may be made by printing the sections B and D on either side of a metal, glass or plastics base and sticking this on to a base by means of an adhesive insulating layer. A similar laminate with sections C and A is stuck on top with another adhesive, insulating layer. An electrostatic shield is placed on top. A multi-cycle, twophase rotary transducer, Fig.20 (not shown) is described in which the active conductors are wedged-shaped, but the spaces are made rectangular. A four-layer, single cycle rotary transducer, Figs.24-29 (not shown) has each winding section in the form of a spiral. Two laminates are placed face to face, and identical spirals are printed on their exposed faces. The laminates then swop positions and are rotated through 90 degrees, and identical spirals printed on their newly exposed faces. The four spirals are then correctly orientated to provide single-cycle sine and cosine windings. Space-phase compensation in 3 or N- phase systems may also be provided. For an N- phase system the transducer includes N windings each having N winding sections arranged in N pattern which are shifted relative to each other by approximately 360/N degrees.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23479272A | 1972-03-15 | 1972-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1391669A true GB1391669A (en) | 1975-04-23 |
Family
ID=22882847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3038172A Expired GB1391669A (en) | 1972-03-15 | 1972-06-29 | Position-measuring transformer |
Country Status (11)
Country | Link |
---|---|
US (1) | US3772587A (en) |
JP (1) | JPS5147544B2 (en) |
AU (1) | AU469223B2 (en) |
CA (1) | CA987751A (en) |
CH (1) | CH564761A5 (en) |
DE (1) | DE2365519C2 (en) |
FR (1) | FR2176326A5 (en) |
GB (1) | GB1391669A (en) |
IT (1) | IT959283B (en) |
NO (1) | NO136061C (en) |
SE (1) | SE391613B (en) |
Families Citing this family (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2202624A5 (en) * | 1972-10-10 | 1974-05-03 | Honeywell Bull Soc Ind | |
NL7305172A (en) * | 1973-04-13 | 1974-10-15 | ||
US3882437A (en) * | 1973-07-13 | 1975-05-06 | Inductosyn Corp | Harmonic cancellation in a variable coupling transformer |
US4096463A (en) * | 1976-12-02 | 1978-06-20 | Xerox Corporation | Inductive transducer |
US4167808A (en) * | 1977-08-15 | 1979-09-18 | Giddings & Lewis, Inc. | Harness for electromagnetic transducer |
US4416056A (en) * | 1977-12-13 | 1983-11-22 | Fujitsu Limited | Process for preparation of film coils |
CA1177127A (en) * | 1980-11-14 | 1984-10-30 | William H. Morong, Iii | Miniaturized transformer construction |
JPS58144107U (en) * | 1982-03-24 | 1983-09-28 | 渡辺パイプ株式会社 | Connecting device for aggregate assembly |
US4590426A (en) * | 1983-12-08 | 1986-05-20 | Sperry Corporation | Bzz and Byz sense loop geometries for cylindrical tensor gradiometer loop structures |
US4985691A (en) * | 1986-02-26 | 1991-01-15 | University Of Pittsburgh | Contactless motion sensor |
EP0295609A3 (en) * | 1987-06-15 | 1991-01-09 | Kollmorgen Corporation | Printed circuit windings for screened inductance sensors, especially sensors for level measurement |
US4918418A (en) * | 1988-08-04 | 1990-04-17 | Caterpillar Inc. | Inductive coil structure with electrical return path |
DE4003902A1 (en) * | 1990-02-09 | 1991-08-14 | Bosch Gmbh Robert | POSITIONER |
US5239288A (en) * | 1990-03-09 | 1993-08-24 | Transicoil Inc. | Resolver having planar windings |
US6249234B1 (en) | 1994-05-14 | 2001-06-19 | Absolute Sensors Limited | Position detector |
US20030062889A1 (en) * | 1996-12-12 | 2003-04-03 | Synaptics (Uk) Limited | Position detector |
US5939966A (en) * | 1994-06-02 | 1999-08-17 | Ricoh Company, Ltd. | Inductor, transformer, and manufacturing method thereof |
GB9523991D0 (en) * | 1995-11-23 | 1996-01-24 | Scient Generics Ltd | Position encoder |
US6788221B1 (en) | 1996-06-28 | 2004-09-07 | Synaptics (Uk) Limited | Signal processing apparatus and method |
US6705511B1 (en) | 1997-05-28 | 2004-03-16 | Synaptics (Uk) Limited | Transducer and method of manufacture |
GB9720954D0 (en) | 1997-10-02 | 1997-12-03 | Scient Generics Ltd | Commutators for motors |
GB9721891D0 (en) | 1997-10-15 | 1997-12-17 | Scient Generics Ltd | Symmetrically connected spiral transducer |
FI103919B (en) * | 1998-02-26 | 1999-10-15 | Metso Paper Automation Oy | Device for measuring the characteristics of a moving paper or cardboard web |
GB9811151D0 (en) * | 1998-05-22 | 1998-07-22 | Scient Generics Ltd | Rotary encoder |
MXPA01005267A (en) | 1998-11-27 | 2002-04-24 | Synaptics Uk Ltd | Position sensor. |
US7019672B2 (en) * | 1998-12-24 | 2006-03-28 | Synaptics (Uk) Limited | Position sensor |
AU2195101A (en) * | 1999-12-10 | 2001-06-18 | Gentech Investment Group Ag | Man-machine interface |
WO2002103622A2 (en) | 2001-05-21 | 2002-12-27 | Synaptics (Uk) Limited | Position sensor |
US7196604B2 (en) * | 2001-05-30 | 2007-03-27 | Tt Electronics Technology Limited | Sensing apparatus and method |
GB0126014D0 (en) | 2001-10-30 | 2001-12-19 | Sensopad Technologies Ltd | Modulated field position sensor |
GB2403017A (en) | 2002-03-05 | 2004-12-22 | Synaptics | Position sensor |
AU2003232360A1 (en) | 2002-06-05 | 2003-12-22 | Synaptics (Uk) Limited | Signal transfer method and apparatus |
GB2394293A (en) * | 2002-10-16 | 2004-04-21 | Gentech Invest Group Ag | Inductive sensing apparatus and method |
US7298137B2 (en) * | 2002-10-16 | 2007-11-20 | Tt Electronics Technology Limited | Position sensing apparatus and method |
GB0303627D0 (en) * | 2003-02-17 | 2003-03-19 | Sensopad Technologies Ltd | Sensing method and apparatus |
GB0317370D0 (en) | 2003-07-24 | 2003-08-27 | Synaptics Uk Ltd | Magnetic calibration array |
GB0319945D0 (en) | 2003-08-26 | 2003-09-24 | Synaptics Uk Ltd | Inductive sensing system |
US20080204116A1 (en) * | 2004-08-09 | 2008-08-28 | Sensopad Limited | Sensing Apparatus And Method |
EP2145158B1 (en) | 2007-05-10 | 2018-03-07 | Cambridge Integrated Circuits Limited | Transducer |
GB2488389C (en) | 2010-12-24 | 2018-08-22 | Cambridge Integrated Circuits Ltd | Position sensing transducer |
JP5802429B2 (en) * | 2011-05-02 | 2015-10-28 | オークマ株式会社 | Stator and resolver |
GB2503006B (en) | 2012-06-13 | 2017-08-09 | Cambridge Integrated Circuits Ltd | Position sensing transducer |
US20220205815A1 (en) * | 2020-12-31 | 2022-06-30 | Mitutoyo Corporation | Sensing winding configuration for inductive position encoder |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2685070A (en) * | 1948-10-27 | 1954-07-27 | Edward G Martin | Variable inductance measuring apparatus |
US2867783A (en) * | 1948-11-06 | 1959-01-06 | Edward G Martin | Measuring device |
US2915721A (en) * | 1957-06-13 | 1959-12-01 | Inductosyn Corp | Reduction of single-turn loop coupling in position-measuring transformers |
US3148347A (en) * | 1961-01-27 | 1964-09-08 | Westinghouse Electric Corp | Transducer having relatively angular movable bifilar printed-circuit-type coils |
GB1157805A (en) * | 1965-07-30 | 1969-07-09 | Emi Ltd | Improvements in or relating to Circuit Elements especially for use as Scanning Coils |
GB1233546A (en) * | 1965-07-30 | 1971-05-26 | ||
US3441888A (en) * | 1966-10-03 | 1969-04-29 | Inductosyn Corp | Multi-layer windings for position measuring transformers |
US3668587A (en) * | 1970-05-13 | 1972-06-06 | Inductosyn Corp | Multi-layer polyphase winding member and transformer |
US3673584A (en) * | 1971-03-08 | 1972-06-27 | Inductosyn Corp | Position-measuring transformer having end-detecting windings useful for positioning a magnetic head of a disc drive system |
-
1972
- 1972-03-15 US US00234792A patent/US3772587A/en not_active Expired - Lifetime
- 1972-05-29 NO NO1895/72A patent/NO136061C/en unknown
- 1972-06-19 AU AU43606/72A patent/AU469223B2/en not_active Expired
- 1972-06-29 GB GB3038172A patent/GB1391669A/en not_active Expired
- 1972-06-30 IT IT69109/72A patent/IT959283B/en active
- 1972-07-07 SE SE7209990A patent/SE391613B/en unknown
- 1972-07-10 JP JP47068259A patent/JPS5147544B2/ja not_active Expired
- 1972-07-17 FR FR7226503A patent/FR2176326A5/fr not_active Expired
- 1972-10-11 CA CA154,110A patent/CA987751A/en not_active Expired
-
1973
- 1973-01-26 DE DE19732365519 patent/DE2365519C2/en not_active Expired
- 1973-02-15 CH CH215973A patent/CH564761A5/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE2365519B1 (en) | 1976-04-01 |
DE2303763B2 (en) | 1976-01-02 |
DE2365519C2 (en) | 1976-11-18 |
AU469223B2 (en) | 1976-02-05 |
CH564761A5 (en) | 1975-07-31 |
NO136061B (en) | 1977-04-04 |
FR2176326A5 (en) | 1973-10-26 |
DE2303763A1 (en) | 1973-09-27 |
SE391613B (en) | 1977-02-21 |
IT959283B (en) | 1973-11-10 |
CA987751A (en) | 1976-04-20 |
NO136061C (en) | 1977-07-13 |
AU4360672A (en) | 1974-01-03 |
JPS5147544B2 (en) | 1976-12-15 |
JPS493655A (en) | 1974-01-12 |
US3772587A (en) | 1973-11-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |