US3913045A - Linear moving field inductor for electromagnetic pumps, conveyor troughs or agitator reels for liquid metals - Google Patents

Linear moving field inductor for electromagnetic pumps, conveyor troughs or agitator reels for liquid metals Download PDF

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Publication number
US3913045A
US3913045A US495126A US49512674A US3913045A US 3913045 A US3913045 A US 3913045A US 495126 A US495126 A US 495126A US 49512674 A US49512674 A US 49512674A US 3913045 A US3913045 A US 3913045A
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United States
Prior art keywords
lamina
moving field
groove
field inductor
bundle
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Expired - Lifetime
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US495126A
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English (en)
Inventor
Starck Axel Von
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SMS Elotherm GmbH
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AEG Elotherm GmbH
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Filing date
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
    • H02K44/02—Electrodynamic pumps
    • H02K44/06—Induction pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
    • B22D39/006—Electromagnetic conveyors

Definitions

  • a linear moving field inductor for an electromagnetic conveyor trough or the like in which each of the teeth of the lamina bundle defining the grooves in which a multiphase induction coil is arranged is bounded by two grooves and encloses a single winding having a height less than the depth of the grooves.
  • a heat elimination device such as copper blocks, is inserted and connected at least on the side facing the groove opening with a groove cooling unit comprising one or more cooling pipes connected thermally with a groove closing plate closing off the groove opening.
  • the invention concerns a linear moving field inductor for electromagnetic pumps, conveyor troughs or agitator reels for liquid metals with a laminated grooved inductor plate packet, in the grooves of which a multiphase inductor coiling for producing an electromagnetic moving field is arranged.
  • a moving field inductor if this sort usually includes a two-layer bar winding made of copper hollow sections through which coolants have passed. This winding can as described in the German Pat. No. 1,908,457 be in the form of a wave winding, for example.
  • These moving field inductors are used especially in the case of electromagnetic conveyor troughts, which usually have a fireproof chute that riese obliquely from a melting or warming vessel.
  • the moving field inductor which when in operation, conveys liquid metal from the melting or warming vessel into the chute by means of its moving field that moves along the length of the chute and works contrary to the force of gravity and moves the metal upwards in an open flow.
  • Moving field inductors of this type have proved very useful in practice.
  • one disadvantage is the fact that their operating voltage generally cannot be voluntarily selected, but is rather essentially determined by the inductor or chute dimensions and the type of metal to be conveyed.
  • a transformer constitutes a relatively large part of the total system.
  • the task of the invention is to provide a linear moving field inductor for electromagnetic pumps, conveyor troughts or agitator reels, containing, in contrast to the known inductors with bar winding, a winding system in which, regardless of the chute arrangement and dimensions, the inductor voltage can be freely selected from a broad range; this inductor, in contrast to the known moving field inductors, is much more easily reparable, the number of required cooling cycles is greatly reduced, and the same conveying capacity is achieved at significantly less real power consumption.
  • the moving field inductor of the invention which is characterized by the fact that each tooth of the lamination bundle arranged on both sides of two grooves is enclosed in a single winding, the height of which is less than the depth of the grooves; that in each groove between the side surfaces of two adjacent single windings, a heat-conduction device connected thermally to these windings is inserted, and is connected at least on its side facing the groove opening with a groove-cooling unit that has one or more cooling pipes that are connected thermally to a grooveclosing plate that closes o-f the groove opening.
  • the single windings be wire coils and/or be cast in insulating material to form a frame-shaped block.
  • the heat-conduction devices are preferably made of copper blocks.
  • heat-conduction lamina are placed between the transformer lamina in the laminated stack of sheets in order to assist in the cooling of the inductor.
  • the heat sinks can preferably be copper pipes through which a coolant has passed.
  • cooling pipes of the cooling units of several grooves are connected by means of bridge-like or bowshaped pipe pieces to meander-shaped cooling coils, and to each other.
  • FIG. 1 shows a preferred model of the moving field inductor of the invention in schematic partial representation
  • FIG. 2 is the corresponding design cross-section.
  • each tooth 3 of the lamina bundle l which is bounded by two grooves 4, is enclosed by a single winding 5, the height of which is less than the depth of the groove and which in this model consist of wire coils cast in insulating material to form a frame-shaped block.
  • a heat-conduction device preferably consisting of a copper block 6 is inserted; this heat-conduction device is connected thermally with the side surfaces of these two single windings 5.
  • a groove cooling unit Connected to these heat-conduction devices 5 is a groove cooling unit, that consists of a copper square pipe 7 and a groove-closing plate 8 connected with that pipe.
  • These groove-closing plates 8 extend over the width of the lamina bundle (see FIG. 2) and at these ends are braced against the lamina bundle 1 in a manner not explained in greater detail, for instance by means of clamp bolts.
  • the cooling pipes 7 of the grooves 4 shown in the diagrams are connected by means of bow-shaped pipe pieces 9 to a meander-shaped cooling coil, one connection 10 of which can be seen in FIG. 2, on the right.
  • a meander-shaped cooling coil one connection 10 of which can be seen in FIG. 2, on the right.
  • For cooling the lamina bundle 1 several heat conduction lamina 11 are placed between the transformer sheets; these heat conduction sheets are connected on the side of the lamina bundle 1 facing the grooved side to copper pipes 12 through which a coolant flows, which act as heat sinks.
  • the electromagnetic moving field in the active inductor surface 13 of such a moving field inductor supplied with these distinct single coils has a high harmonic content in contrast to normal rotary current bar winding inductors.
  • Such an inductor could not, for example, be used as a stator for electric rotary current machines, as these harmonic waves would disrupt the effective ground wave of the moving field considerably in the generally relatively narrow air gap.
  • the air gap is determined by the required separation of liquid metal and the inductor by fireproof material, insofar that the harmonic waves that, with increasing distance from the active inductor surface are far more weakened than the ground waves, no longer significantly disrupt the moving field.
  • the moving field inductor is intended to eliminate quantities of heat that come from three sources.
  • the heat given off by the liquid metal in the directection of the arrow 14 to the inductor is emitted through the groove-closing plates 8 to the cooling pipe 7 and from there eliminated with the help of the flowing coolant.
  • the major portion of the heat due to energy losses that arises in the single windings is emitted through the copper blocks 6 to the cooling pipe 7 and the coolant flowing through it.
  • the heat due to energy losses that forms in the lamina bundle is eliminated through the lamina bundle cooling, which contributes thereby to a small part of the cooling of the single windings.
  • the electromagnetic groove transverse field produces eddy currents in the copper blocks 6 serving as heat-elimination devices, so that the blocks act in an advantageous manner also as amortisseur windings.
  • the effect of the copper blocks 6 in this respect can be regulated advantageously by cutting slits of various depths in them; their heat elimination capacity is not significantly affected by this.
  • linear moving field inductor for apparatus for moving molten metal having a laminated grooved inductor lamina bundle of magnetic material, in the grooves of which a multiphase induction coil is arranged, the improvement wherein each of the teeth of the lamina bundle is bounded on both sides by two grooves and enclosed in a single winding, the height of which is less than the depth of the grooves; and in each groove between the side surfaces of two adjacent single windings a heat-elimination device is inserted and connected thermally with the windings and connected at least on its side facing the groove opening with a groove cooling unit with one or more cooling pipes that are connected thermally with a groove-closing plate that closes off the groove opening.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Linear Motors (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Motor Or Generator Cooling System (AREA)
  • General Induction Heating (AREA)
US495126A 1973-08-03 1974-08-05 Linear moving field inductor for electromagnetic pumps, conveyor troughs or agitator reels for liquid metals Expired - Lifetime US3913045A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2339318A DE2339318C3 (de) 1973-08-03 1973-08-03 Linearer Wanderfeldinduktor für den Transport geschmolzener Metalle

Publications (1)

Publication Number Publication Date
US3913045A true US3913045A (en) 1975-10-14

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ID=5888768

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Application Number Title Priority Date Filing Date
US495126A Expired - Lifetime US3913045A (en) 1973-08-03 1974-08-05 Linear moving field inductor for electromagnetic pumps, conveyor troughs or agitator reels for liquid metals

Country Status (8)

Country Link
US (1) US3913045A (de)
JP (1) JPS5044406A (de)
CH (1) CH576722A5 (de)
DE (1) DE2339318C3 (de)
FR (1) FR2239798B1 (de)
GB (1) GB1434151A (de)
IT (1) IT1018798B (de)
SE (1) SE7409865L (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092086A (en) * 1976-05-14 1978-05-30 Aeg-Elotherm, G.M.B.H. Electromagnetic conveyer trough for the conveyance of molten metals
US4510421A (en) * 1982-07-10 1985-04-09 Krauss-Maffei Aktiengesellschaft Linear magnet
US4749921A (en) * 1986-07-21 1988-06-07 Anwar Chitayat Linear motor with non-magnetic armature
US4818184A (en) * 1986-03-31 1989-04-04 Agency Of Industrial Science & Technology Device for generating jet with electric field
US4839545A (en) * 1987-10-16 1989-06-13 Anwar Chitayat Cooling system for linear motor
US4906960A (en) * 1984-04-03 1990-03-06 Hydro-Quebec Distribution transformer with coiled magnetic circuit
US4906878A (en) * 1986-10-08 1990-03-06 Fanamation, Inc. Fluid circulated linear motor for robotic systems
US4928138A (en) * 1989-06-30 1990-05-22 Sundstrand Corporation Power supply with integral filter and cooling device
US5072146A (en) * 1989-08-04 1991-12-10 The Glacier Metal Company Limited Magnetic bearings coil heat removal
US5703420A (en) * 1994-10-11 1997-12-30 Canon Kabushiki Kaisha Moving magnet type multi-phase linear motor with vibration suppression and coil cooling means
WO1998007228A1 (en) * 1996-08-13 1998-02-19 Sedgewick Richard D Linear motor with improved coil design and heat removal
US5783877A (en) * 1996-04-12 1998-07-21 Anorad Corporation Linear motor with improved cooling
WO2001031768A1 (fr) * 1999-10-28 2001-05-03 Sodick Co., Ltd. Ensemble bobine pour moteur lineaire et procede de fabrication
US20030011254A1 (en) * 2001-07-10 2003-01-16 Canon Kabushiki Kaisha Electromagnetic actuator and exposure apparatus including the same
US6608407B2 (en) 2000-03-29 2003-08-19 Sodick Co., Ltd. Linear motor armature
US20060250205A1 (en) * 2005-05-04 2006-11-09 Honeywell International Inc. Thermally conductive element for cooling an air gap inductor, air gap inductor including same and method of cooling an air gap inductor
US20070096566A1 (en) * 2005-11-01 2007-05-03 Asml Netherlands B.V. Electromagnetic actuator, method of manufacturing a part of an electromagnetic actuator, and lithographic apparatus comprising an electromagnetic actuator
US20080144283A1 (en) * 2006-09-11 2008-06-19 International Business Machines Corporation Heat Sinks For Dissipating A Thermal Load
WO2008032080A3 (en) * 2006-09-13 2009-03-19 Wireless Motor Developments Lt Improvements in electromagnetic machines
US20090146513A1 (en) * 2007-12-05 2009-06-11 Ronald Dean Bremner Rotary electric machine stator assembly design and manufacturing method
US8368258B2 (en) 2009-03-05 2013-02-05 Sanyo Denki Co., Ltd. Armature for linear motor
US20150180322A1 (en) * 2013-12-19 2015-06-25 Delta Electronics, Inc. Linear motor and motor set using same
EP2352221A4 (de) * 2008-10-23 2016-03-02 Sodick Co Ltd Lineare motorspulenanordnung mit kühlelement
US20170010544A1 (en) * 2014-01-22 2017-01-12 Asml Netherlands B.V. Coil assembly, electromagnetic actuator, stage positioning device, lithographic apparatus and device manufacturing method
EP2701292A3 (de) * 2012-08-23 2017-07-26 Sanyo Denki Co., Ltd. Linearmotor
CN114105529A (zh) * 2021-11-17 2022-03-01 深圳市鸿富诚屏蔽材料有限公司 一种高导热吸波复合材料及其制备方法及吸波导热垫片

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2621632B2 (de) * 1976-05-14 1978-08-24 Aeg-Elotherm Gmbh, 5630 Remscheid Elektromagnetische Transportrinne zum Transport schmelzflüssiger Metalle
JPS59110364A (ja) * 1982-12-16 1984-06-26 Amada Co Ltd リニア誘導モ−タの熱歪除去方法及びその装置
FR2726948B1 (fr) † 1994-11-16 1996-12-20 Wavre Nicolas Moteur synchrone a aimants permanents
GB2352094B (en) * 1996-04-12 2001-02-21 Anorad Corp A linear motor with improved cooling
JP4111672B2 (ja) * 2000-09-29 2008-07-02 山洋電気株式会社 リニアモータ用電機子
DE102006005316B4 (de) * 2006-02-06 2020-03-26 Siemens Aktiengesellschaft Kühleinrichtung für eine elektrische Maschine, elektrische Maschinen mit einer solchen Kühleinrichtung, Dynamoblech sowie Herstellungsverfahren für solche elektrischen Maschinen
DE102006058910A1 (de) 2006-12-13 2008-07-03 Siemens Ag Primärteil einer elektrischen Maschine mit Wärmeleitblech

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645646A (en) * 1969-02-12 1972-02-29 Aeg Elotherm Gmbh Electromagnetic pump or conveyor trough

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645646A (en) * 1969-02-12 1972-02-29 Aeg Elotherm Gmbh Electromagnetic pump or conveyor trough

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4092086A (en) * 1976-05-14 1978-05-30 Aeg-Elotherm, G.M.B.H. Electromagnetic conveyer trough for the conveyance of molten metals
US4510421A (en) * 1982-07-10 1985-04-09 Krauss-Maffei Aktiengesellschaft Linear magnet
US4906960A (en) * 1984-04-03 1990-03-06 Hydro-Quebec Distribution transformer with coiled magnetic circuit
US4818184A (en) * 1986-03-31 1989-04-04 Agency Of Industrial Science & Technology Device for generating jet with electric field
US4749921A (en) * 1986-07-21 1988-06-07 Anwar Chitayat Linear motor with non-magnetic armature
US4906878A (en) * 1986-10-08 1990-03-06 Fanamation, Inc. Fluid circulated linear motor for robotic systems
US4839545A (en) * 1987-10-16 1989-06-13 Anwar Chitayat Cooling system for linear motor
US4928138A (en) * 1989-06-30 1990-05-22 Sundstrand Corporation Power supply with integral filter and cooling device
US5072146A (en) * 1989-08-04 1991-12-10 The Glacier Metal Company Limited Magnetic bearings coil heat removal
US5703420A (en) * 1994-10-11 1997-12-30 Canon Kabushiki Kaisha Moving magnet type multi-phase linear motor with vibration suppression and coil cooling means
US5783877A (en) * 1996-04-12 1998-07-21 Anorad Corporation Linear motor with improved cooling
WO1998007228A1 (en) * 1996-08-13 1998-02-19 Sedgewick Richard D Linear motor with improved coil design and heat removal
US5959415A (en) * 1996-08-13 1999-09-28 Richard D. Sedgewick Linear motor with improved coil design and heat removal
US5998890A (en) * 1996-08-13 1999-12-07 Airex Corporation Linear motor with improved coil design and heat removal
US20040070288A1 (en) * 1999-10-28 2004-04-15 Sodick Co., Ltd. Linear motor coils assembly and manufacturing method thereof
CN100488006C (zh) * 1999-10-28 2009-05-13 沙迪克株式会社 直线电动机的线圈组合体及其制造方法
US6661124B1 (en) * 1999-10-28 2003-12-09 Sodick Co., Ltd. Linear motor coils assembly and method for manufacturing the same
WO2001031768A1 (fr) * 1999-10-28 2001-05-03 Sodick Co., Ltd. Ensemble bobine pour moteur lineaire et procede de fabrication
US6789305B2 (en) * 1999-10-28 2004-09-14 Sodick Co., Ltd. Linear motor coils assembly and manufacturing method thereof
US6608407B2 (en) 2000-03-29 2003-08-19 Sodick Co., Ltd. Linear motor armature
US6847132B2 (en) * 2001-07-10 2005-01-25 Canon Kabushiki Kaisha Electromagnetic actuator having an armature coil surrounded by heat-conducting anisotropy material and exposure apparatus
US20030011254A1 (en) * 2001-07-10 2003-01-16 Canon Kabushiki Kaisha Electromagnetic actuator and exposure apparatus including the same
US20060250205A1 (en) * 2005-05-04 2006-11-09 Honeywell International Inc. Thermally conductive element for cooling an air gap inductor, air gap inductor including same and method of cooling an air gap inductor
US20070096566A1 (en) * 2005-11-01 2007-05-03 Asml Netherlands B.V. Electromagnetic actuator, method of manufacturing a part of an electromagnetic actuator, and lithographic apparatus comprising an electromagnetic actuator
US7696652B2 (en) * 2005-11-01 2010-04-13 Asml Netherlands B.V. Electromagnetic actuator, method of manufacturing a part of an electromagnetic actuator, and lithographic apparatus comprising and electromagnetic actuator
US20080144283A1 (en) * 2006-09-11 2008-06-19 International Business Machines Corporation Heat Sinks For Dissipating A Thermal Load
US7505272B2 (en) * 2006-09-11 2009-03-17 International Business Machines Corporation Heat sinks for dissipating a thermal load
WO2008032080A3 (en) * 2006-09-13 2009-03-19 Wireless Motor Developments Lt Improvements in electromagnetic machines
US8232689B2 (en) 2006-09-13 2012-07-31 Guilden Limited Electromagnetic machines
US20100007223A1 (en) * 2006-09-13 2010-01-14 Wireless Motor Developments Limited Improvements in electromagnetic machines
US20090146513A1 (en) * 2007-12-05 2009-06-11 Ronald Dean Bremner Rotary electric machine stator assembly design and manufacturing method
EP2352221A4 (de) * 2008-10-23 2016-03-02 Sodick Co Ltd Lineare motorspulenanordnung mit kühlelement
US8368258B2 (en) 2009-03-05 2013-02-05 Sanyo Denki Co., Ltd. Armature for linear motor
EP2701292A3 (de) * 2012-08-23 2017-07-26 Sanyo Denki Co., Ltd. Linearmotor
US20150180322A1 (en) * 2013-12-19 2015-06-25 Delta Electronics, Inc. Linear motor and motor set using same
US9641058B2 (en) * 2013-12-19 2017-05-02 Delta Electronics, Inc. Linear motor and motor set having multiple magnetic yoke portions supporting magnets
US20170010544A1 (en) * 2014-01-22 2017-01-12 Asml Netherlands B.V. Coil assembly, electromagnetic actuator, stage positioning device, lithographic apparatus and device manufacturing method
CN114105529A (zh) * 2021-11-17 2022-03-01 深圳市鸿富诚屏蔽材料有限公司 一种高导热吸波复合材料及其制备方法及吸波导热垫片
CN114105529B (zh) * 2021-11-17 2023-08-29 深圳市鸿富诚新材料股份有限公司 一种高导热吸波复合材料及其制备方法及吸波导热垫片

Also Published As

Publication number Publication date
FR2239798A1 (de) 1975-02-28
CH576722A5 (de) 1976-06-15
IT1018798B (it) 1977-10-20
JPS5044406A (de) 1975-04-21
GB1434151A (en) 1976-05-05
DE2339318C3 (de) 1978-09-28
FR2239798B1 (de) 1978-07-13
SE7409865L (de) 1975-02-04
DE2339318A1 (de) 1975-02-20
DE2339318B2 (de) 1978-01-26

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