EP0294913A3 - Polyphase power supply for continuous levitation casting - Google Patents

Polyphase power supply for continuous levitation casting Download PDF

Info

Publication number
EP0294913A3
EP0294913A3 EP88301503A EP88301503A EP0294913A3 EP 0294913 A3 EP0294913 A3 EP 0294913A3 EP 88301503 A EP88301503 A EP 88301503A EP 88301503 A EP88301503 A EP 88301503A EP 0294913 A3 EP0294913 A3 EP 0294913A3
Authority
EP
European Patent Office
Prior art keywords
power
polyphase
induction coil
controller
rectifier
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.)
Withdrawn
Application number
EP88301503A
Other languages
German (de)
French (fr)
Other versions
EP0294913A2 (en
Inventor
Paul C. Boehm
Richard A. Ranlof
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.)
Inductotherm Corp
Original Assignee
Inductotherm Corp
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 Inductotherm Corp filed Critical Inductotherm Corp
Publication of EP0294913A2 publication Critical patent/EP0294913A2/en
Publication of EP0294913A3 publication Critical patent/EP0294913A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/22—Furnaces without an endless core
    • H05B6/32—Arrangements for simultaneous levitation and heating

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)
  • Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
  • General Induction Heating (AREA)

Abstract

An apparatus (50) for supplying polyphase power to an induction coil (62) for magnetically levitating metal to be cast comprises an input (52) for connecting the apparatus to a source of polyphase AC power and a polyphase rectifier (54) for rectifying the AC power. A first controller (56) selectably varies the magnitude of RMS current supplied to the induction coil by controlling the electrical phasing of the rectifier. A polyphase inverter (58) operatively associated with the rectifier converts the rectified AC power to polyphase AC power and supplies the polyphase AC power to the induction coil at a pre­ selected frequency. A second controller (60), independent of the first controller, controls the frequency of the AC power supplied to the induction coil by controlling the electrical phasing of the inverter. The induction coil has a plurality of sections (⊘1 to-Ø3), each section being wound to provide a phase rotation of a magnetic force vector over substantially the entire length of the coil to produce a continuous magnetic levitation force.
EP88301503A 1987-06-12 1988-02-23 Polyphase power supply for continuous levitation casting Withdrawn EP0294913A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6090087A 1987-06-12 1987-06-12
US60900 1987-06-12

Publications (2)

Publication Number Publication Date
EP0294913A2 EP0294913A2 (en) 1988-12-14
EP0294913A3 true EP0294913A3 (en) 1989-08-09

Family

ID=22032445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88301503A Withdrawn EP0294913A3 (en) 1987-06-12 1988-02-23 Polyphase power supply for continuous levitation casting

Country Status (2)

Country Link
EP (1) EP0294913A3 (en)
JP (1) JPS63317238A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2799335B1 (en) * 1999-10-04 2001-12-14 Centre Nat Rech Scient METHOD OF NON-CONTACT MELTING AND SOLIDIFICATION OF AN ELECTRICALLY CONDUCTIVE SAMPLE
GB0213848D0 (en) * 2002-06-15 2002-07-24 Stein Atkinson Strody Ltd Furnace

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414285A (en) * 1982-09-30 1983-11-08 General Electric Company Continuous metal casting method, apparatus and product
US4578552A (en) * 1985-08-01 1986-03-25 Inductotherm Corporation Levitation heating using single variable frequency power supply

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414285A (en) * 1982-09-30 1983-11-08 General Electric Company Continuous metal casting method, apparatus and product
US4578552A (en) * 1985-08-01 1986-03-25 Inductotherm Corporation Levitation heating using single variable frequency power supply

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CGEE ALSTHOM: "VARIAL C" September 1986, LEVALLOIS-PERRET *
ELEKTROWARME INTERNATIONAL vol. 34, no. B4, August 1976, ESSEN page 198 - 202; KENTNER: "BETRIEBSERFAHRUNGEN MIT SCHWINGKREISUMRICHTERN FUR MF-INDUKTIONSSCHMELZANLAGEN" *

Also Published As

Publication number Publication date
JPS63317238A (en) 1988-12-26
EP0294913A2 (en) 1988-12-14

Similar Documents

Publication Publication Date Title
EP0218729A4 (en) Method of controlling a three-phase induction motor.
CA2312876A1 (en) Electromagnetic braking device for a smelting metal in a continuous casting installation
AU9362998A (en) Method and device for controlling the magnetic flux with an auxiliary winding ina rotating high voltage electric alternating current machine
EP0450744A3 (en) Apparatus and method for controlling power supply to an inductive load, such as a furnace
JP2002508257A5 (en)
EP0294913A3 (en) Polyphase power supply for continuous levitation casting
AU4635496A (en) Ac/dc converter
TW285786B (en)
CA2180397A1 (en) Method and apparatus for controlling the output of an engine driven power supply
US4531037A (en) Process and means to control the average heating power induced in a flat conducting product maintained electromagnetically in position without contact
FR2829312B1 (en) DC POWER SUPPLY DEVICE FOR ARC OVEN
JPS57132792A (en) Control system for induction motor
JPS5714468A (en) Controlling method of welding
CN212990853U (en) Transformer base easy to assemble and dismantle
JPS6439270A (en) Power source equipment
EP0766374A3 (en) DC power supply device
CZ201898A3 (en) Switching gear for electromagnetically controlled structural units
SU1257024A1 (en) Magnetofriction electric drive for belt conveyor
JPS628155Y2 (en)
JPH05158563A (en) Ac power adjusting device
DE69914573D1 (en) Magnetic heating system
JPS56106169A (en) Information transmission device
JPH03205780A (en) Transformer control system for ac/dc microwave oven
EP0227872A1 (en) A method and system for compensating the electromotive forces of self-induction and mutual induction in a conventional asymmetric high current line
JPS61240855A (en) Super-low-frequency high-voltage generating set

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900129

17Q First examination report despatched

Effective date: 19920609

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19921020