US2790055A - Inductor - Google Patents

Inductor Download PDF

Info

Publication number
US2790055A
US2790055A US382170A US38217053A US2790055A US 2790055 A US2790055 A US 2790055A US 382170 A US382170 A US 382170A US 38217053 A US38217053 A US 38217053A US 2790055 A US2790055 A US 2790055A
Authority
US
United States
Prior art keywords
aperture
inductor
current
parts
field
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 - Lifetime
Application number
US382170A
Other languages
English (en)
Inventor
Dirk Christiaan Van Iperen
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2790055A publication Critical patent/US2790055A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H05B6/36—Coil arrangements
    • H05B6/362—Coil arrangements with flat coil conductors

Definitions

  • This invention relates to inductors and more particularly to plate-shaped inductors for inductive HF-heating.
  • parts of the inductor in the axial direction thereof and adjacent the inner edge of the working aperture are arranged with small spacing and in overlapping position at the area of the connections to the supply conductors, at least one part having a narrowed portion in planes at right angles to the axial direction of the inductor.
  • the narrowed part makes it possible for the current path and the current strength in at least one of the overlapping parts at the inner edge bounding the working aperture of the inductor to be matched to the requirements imposed upon the heating of the workpiece.
  • the narrowed part results from the presence of an aperture in one of the said parts.
  • said aperture extends into one side of the said part, but preferably into the outer edge thereof.
  • an aperture should be provided in each of the overlapping parts, in which case the apertures are preferably located symmetrically with respect to one another.
  • Fig. 1 shows a prior art inductor
  • Fig. 2 shows an improved form of inductor
  • Fig. 3 shows a plate shape inductor which is a further, more improved, plate-shaped inductor embodying the present invention
  • Fig. 4 is another embodiment of the present invention.
  • reference numeral 1 indicates an ordinary plate-shaped inductor having a Working aperture 2 in which the work-piece is arranged. Due to the presence of an air-gap 3, the work-piece in the vicinity of the air-gap is heated insufiiciently with respect to the other part thereof.
  • the larger proportion of the current follows the path indicated diagrammatically by a large arrow 8, a smaller proportion following the path indicated by a small arrow 9, since the resistance along the last-mentioned path is higher due to the presence of aperture 6.
  • a suitable distribution of current in connection with the desired heating of the work-piece may thus be obtained, even if in particular cases in the region of the overlapping parts 4 and 5 a temperature of the work-piece is locally desired which is higher than in the other part thereof.
  • a sawcut 10 instead of the aperture 6 of Figure 2 is provided. According to the position of this sawcut, which is more to the left or more to the right and/or shorter or longer, the current is forced more or less into a corner 11, so that the current 12 in the overlapping part 4 at the inner edge bounding the work-piece may be caused by the said means to have a smaller or greater influence.
  • a similar sawcut may be provided in the other part 5 at the area indicated by a dotted line in Fig. 3.
  • Such inductors are important more particularly for soldering tins or similar objects.
  • a plate-shaped inductor for high frequency heating having a working aperture therein comprising a pair of supply conductors, a pair of spaced parts on said inductor connected to said supply conductors and being laterally displaced to locations out of the plane of said inductor and arranged in superposed relationship to one another and forming an airgap therebetween, and at least one of said superposed parts having at least one slit-like aperture extending into one side of said one part Whereby the desired distribution of current in said inductor is furnished.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
US382170A 1952-10-16 1953-09-24 Inductor Expired - Lifetime US2790055A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL728805X 1952-10-16
NL1085161X 1952-10-16
NL316946X 1952-10-16
NL2790055X 1952-10-16

Publications (1)

Publication Number Publication Date
US2790055A true US2790055A (en) 1957-04-23

Family

ID=27483729

Family Applications (1)

Application Number Title Priority Date Filing Date
US382170A Expired - Lifetime US2790055A (en) 1952-10-16 1953-09-24 Inductor

Country Status (2)

Country Link
US (1) US2790055A (fr)
FR (1) FR1085161A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001162A (en) * 1959-11-24 1961-09-19 Taylor Winfield Corp Welding transformer
US4186729A (en) * 1977-11-25 1980-02-05 Donald L. Morton & Associates Deep heating electrode
US4325361A (en) * 1977-11-25 1982-04-20 Donald L. Morton & Associates Deep heating electrode
US4402309A (en) * 1981-10-22 1983-09-06 Donald L. Morton & Associates Therapeutic magnetic electrode
US5001319A (en) * 1989-03-13 1991-03-19 Tetra Pak Holdings & Finance S.A. Arrangement for continuous induction welding
US20090127254A1 (en) * 2007-11-16 2009-05-21 Mtu Aero Engines Gmbh Induction coil, method and device for inductive heating of metallic components

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477118A (en) * 1945-09-28 1949-07-26 Western Electric Co High-frequency induction heating apparatus
US2481071A (en) * 1945-07-25 1949-09-06 Chrysler Corp High-frequency induction heating device
US2528714A (en) * 1949-10-22 1950-11-07 Ohio Crankshaft Co High-frequency inductor block
US2647200A (en) * 1949-05-14 1953-07-28 Westinghouse Electric Corp Controlled induction heating with scanning
US2655590A (en) * 1950-01-04 1953-10-13 Ohio Crankshaft Co Induction heating apparatus
US2689296A (en) * 1949-06-09 1954-09-14 Ohio Crankshaft Co Means and method of high-frequency induction heating

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481071A (en) * 1945-07-25 1949-09-06 Chrysler Corp High-frequency induction heating device
US2477118A (en) * 1945-09-28 1949-07-26 Western Electric Co High-frequency induction heating apparatus
US2647200A (en) * 1949-05-14 1953-07-28 Westinghouse Electric Corp Controlled induction heating with scanning
US2689296A (en) * 1949-06-09 1954-09-14 Ohio Crankshaft Co Means and method of high-frequency induction heating
US2528714A (en) * 1949-10-22 1950-11-07 Ohio Crankshaft Co High-frequency inductor block
US2655590A (en) * 1950-01-04 1953-10-13 Ohio Crankshaft Co Induction heating apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001162A (en) * 1959-11-24 1961-09-19 Taylor Winfield Corp Welding transformer
US4186729A (en) * 1977-11-25 1980-02-05 Donald L. Morton & Associates Deep heating electrode
US4325361A (en) * 1977-11-25 1982-04-20 Donald L. Morton & Associates Deep heating electrode
US4402309A (en) * 1981-10-22 1983-09-06 Donald L. Morton & Associates Therapeutic magnetic electrode
US5001319A (en) * 1989-03-13 1991-03-19 Tetra Pak Holdings & Finance S.A. Arrangement for continuous induction welding
US20090127254A1 (en) * 2007-11-16 2009-05-21 Mtu Aero Engines Gmbh Induction coil, method and device for inductive heating of metallic components

Also Published As

Publication number Publication date
FR1085161A (fr) 1955-01-28

Similar Documents

Publication Publication Date Title
US3431379A (en) Method for induction heating
US2493950A (en) High-frequency inductive welding apparatus
US2314865A (en) Heating device
US2790055A (en) Inductor
US7368689B2 (en) Device for heating by induction of metal strip
US2785263A (en) Method for the local heating of metallic work-pieces by inductive hf-heating and hf-inductor
US4163884A (en) Induction heating core for adhesive fastening systems
US2897328A (en) Method of progressively heating sheet metal and an induction coil for performing the method
US2708704A (en) Electric heating coil structure
US3510619A (en) Apparatus for induction heating
US2474703A (en) Induction heating coil providing distribution of heating effect
US2809264A (en) Plate-shaped inductor for inductive high-frequency heating
US2715171A (en) High-frequency inductor arrangement
US2632840A (en) Means for inductively heating narrow elongated portions of cylindrical bodies
JP6161479B2 (ja) 誘導加熱装置
US2763756A (en) Induction welding
US3121780A (en) Inductor for heating a channel member
US2477118A (en) High-frequency induction heating apparatus
US2655589A (en) High-frequency inductor
US2692934A (en) High-frequency inductor arrangement for controlling the induced heat pattern
US2652474A (en) Method of heating opposed edges of elongated members
US2359285A (en) Induction furnace
US4499369A (en) Heating element arrangement for a vacuum furnace
US2765389A (en) Inductor for inductive h. f. heating
JP5139136B2 (ja) 誘導加熱装置