Abstract: An induction heating apparatus including an inverter comprising a switching element, the inverter configured to supply a power to a first node based on an operation of the switching element; a first heating coil around which a wire is wound in a first winding direction with respect to the first node and configured to be heated by the power supplied from the first node; a second heating coil around which a wire is wound in a second winding direction different from the first winding direction with respect to the first node and configured to be heated by the power supplied from the first node; and at least one processor configured to control a resonance frequency of a current flowing through the first heating coil and the second heating coil.

Abstract: An induction heating cooker includes a housing, an inner pot including a bottom part that includes a first area and a second area, and an inner pot storage part disposed in the housing. The inner pot storage stores the inner pot in a manner that the inner pot can be set or removed. Also, a first heating coil is below the inner pot storage part, arranged in a position facing the first area of the inner pot, that heats the inner pot by induction. Also, a second heating coil is below the inner pot storage part, arranged in a position facing the second area of the inner pot, that heats the inner pot by induction. A driving unit in the housing supplies high frequency currents to the first heating coil and the second heating coil, and a controller controls the driving unit.

Abstract: The invention provides a heater station (2) for heating fluids flowing in an undersea pipe network, the station comprising at least one heater duct (6) made of conductive material designed to be connected to an undersea pipe (4) for transporting fluids, and at least one solenoid (8) wound around a portion of the heater duct and electrically powered to heat the heater duct portion by electromagnetic induction.

Abstract: A method and apparatus for joining parts. A plurality of conformable induction coils embedded in a number of elastomeric sheets is positioned relative to a first composite part of the parts and a second composite part of the parts. A magnetic field is generated with the plurality of conformable induction coils. The magnetic field is configured to generate heat in a magnetically permeable material at a joint location. The heat joins the first composite part and the second composite part to each other.

Abstract: Disclosed herein is an independent power generator assembly comprising a driving magnetic member in which N pole and S pole are arranged alternately; a first power generation module including an induction coil, and plural power supply generating members having isolation spaces with the driving magnetic member as the center, and arranged and constructed along the circumference of the driving magnetic member, the power supply generating member having a magnet vibrator; and a second power generation module in which induction coils are arranged along the isolation spaces; wherein the first power generation module and the second power generation module are repeatedly arranged with an annular ring shape: another first power generation module is arranged at the circumference of the second power generation module and another second power generation module is arranged at the circumference of such an another first power generation module.

Abstract: [Object] An object is to provide an induction heating method having a high power factor in which when thermal processing is performed through a plurality of heating coils receiving the supply of the current to generate mutual induction, it is possible to easily and rapidly perform synchronization control on a coil current and in which when the current is varied, even if the speed of control on the current value is increased, this little affects an inverter phase angle. [Solving means] In an induction heating method using an induction heating device that heats an item to be heated and includes a plurality of self-resonant circuits to which a resonant high-frequency power supply feeding currents of equal frequency to a plurality of heating coils receiving the supply of the current to generate mutual induction is connected, the phases of impedances within a system are made to coincide with each other to minimize the phases.

Abstract: The present invention relates to an induction cooking hob (10) with a plurality of induction coils (16). The induction cooking hob (10) comprises a cooking surface (12) and a control unit. The cooking surface (12) includes a cover plate. The induction coils (16) are arranged side-by-side according to a predetermined scheme and below the cover plate. At least one induction coil (16) is marked by an identification symbol (18). The identification symbol (18) includes a first element (20) and a second element (22), wherein the first element (20) extends beyond the diameter of the corresponding induction coil (16) and the second element (22) marks the diameter of said induction coil (16).

Abstract: A method of fabricating a thermoplastic component using inductive heating is described. The method includes positioning a plurality of induction heating coils to define a process area for the thermoplastic component, wherein the plurality of induction heating coils comprises a first set of coils and a second set of coils. The method also includes controlling a supply of electricity provided to the plurality of inductive heating coils to intermittently activate the coils. The intermittent activation is configured to facilitate prevention of electromagnetic interference between adjacent coils.

Abstract: A method of fabricating a thermoplastic component using inductive heating is described. The method includes positioning a plurality of induction heating coils to define a process area for the thermoplastic component, wherein the plurality of induction heating coils comprises a first set of coils and a second set of coils. The method also includes controlling a supply of electricity provided to the plurality of inductive heating coils to intermittently activate the coils. The intermittent activation is configured to facilitate prevention of electromagnetic interference between adjacent coils.

Abstract: A system and method of restoring material properties is disclosed. A subject material may have one or more of its material properties restored by contacting a packed bed of a reactive material contained within a container with the subject material in which material properties are desired to be restored. The packed bed and the subject material may be heated to restore the material properties. The packed bed may be formed from boron, silicon or other appropriate materials. An inert atmosphere system may have an argon injection system or a helium injection system in communication with the container. A deoxidizing system may be in communication with the container for creating a vacuum within the container or injecting hydrogen into the container.

Abstract: An object of the invention is to accurately detect a state of an object to be heated in a cooking vessel and effectively avoid cooking failure. An induction heating section (13) inductively heats a cooking vessel (11). A vibration detecting section (14) detects a vibration of the cooking vessel (11) via a top plate (12). A vibration waveform extracting section (15) extracts a vibration waveform of a frequency component having a frequency equal to a predetermined multiplication product of an induction heating frequency, from a waveform of the vibration detected by the vibration detecting section (14). A determining section (16) determines a state of an object to be heated, based on the vibration waveform extracted by the vibration waveform extracting section (15).

Abstract: A high-frequency induction heating apparatus is provided with a high-frequency oscillation apparatus, a heating coil, a high-frequency transformer and the like, the heating coil has a first coil through which prescribed current outputted by the high-frequency oscillation apparatus is flown, a second coil through which current different from the predetermined current is flown by the high-frequency transformer, and the first coil heats a trunk part and a bottom side part of the can body, and the second coil heats the trim side part of the can body.

Abstract: A surface heating system is provided. The surface heating system includes a heatable surface element with a supporting structure on which a conductive layer is arranged that is completely covered by a cover layer. A first induction coil is configured separately of the heatable surface element and is connectable to an AC voltage source.

Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece, even a large workpiece, can be readily and approximately uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated H1, H2 are established on a workpiece W so as to extend in one direction and the areas to be heated H1, H2 are induction-heated, the deformation amount on one edge of the areas to be heated H1, H2 is different from that on the other. This induction heating device includes: heating coils 451 facing a portion of the areas to be heated H1, H2 when the workpiece W is induction-heated; and a relative transfer means for transferring the workpiece W and the heating coils 451 along one direction in a relative manner, and the heating coils 451 are disposed so as to correspond to the areas to be heated H1, H2 during the heating period.

Abstract: A current conducting melting vessel within which glass can be melted is provided. At least two induction heating coils are provided at selected locations proximate to the melting vessel. Power is selectively supplied to the coils to thereby selectively energize the coils so that the mutual induction of current in a non-energized heating coil adjacent to an energized heating coil is prevented via a switching element in power supply circuitry associated with the non-energized coil.

Abstract: An apparatus for heating by electromagnetic induction heating e.g., for heating silicon carbide, with a first power supply arrangement (1) having an output with two terminals (11, 12), with a second power supply arrangement (2) for providing an n-phase multi-phase AC voltage at n outputs, each output having two terminals (21, 22, 23). The phase shift between the chained voltages (U12, U21) of the n-phase multi-phase AC voltage provided at output side of second power supply arrangement is 360°/n. The n outputs of the second power supply arrangement (2) form a chain: two terminals are assigned to n-2 outputs, in two outputs of the n outputs have only one terminal (22), which is also associated with another output, whereas the other terminals (21, 23) of these two outputs are associated only with one output and wherein these terminals (21, 23) form the beginning and the end of the chain.

Abstract: A heating device for heating a hollow component may include at least one inner induction coil and at least one outer induction coil, each configured to be heated. At least one element may be configured to influence a magnetic field formed between the inner and the outer induction coil during the operation of the heating device. The element may be arranged between the inner and the outer induction coils. Regions of the hollow component may be thinner and the thinner regions may be configured to heat more quickly than the remaining thicker regions. The thinner and thicker regions of the component may allow even heating of the component to be achieved.

Abstract: An induction heating apparatus for controlling the temperature distribution for heating a metal plate irrespective if it has a small thickness, is magnetic or nonmagnetic, and capable of coping with a change in the width of the plate, or meandering of the plate.

Abstract: The invention provides an induction heating system and method of using it for heating a metal plate. The induction coil of the induction heating system includes sections each having conductors at front and back surfaces of the metal plate, which are arranged such that at least a one of the front or back surface conductor has a part slanted in the width direction of the metal plate, and vertical projections of the conductors onto the metal plate do not overlap at the center of the metal plate but overlap outside the edges of the metal plate. In addition, front conductors from adjacent sections are spaced differently as back conductors. The induction heating system allows for better control of the heating temperature distribution regardless of the metal plates thickness and magnetic properties, especially temperature distributions at the edges of the metal plate.

Abstract: A semiconductor substrate thermal treatment apparatus enables excellent heating control in suppressing influence of mutual induction between induction heating coils even when the induction heating coils are arranged in the vertical direction while providing horizontal magnetic flux to susceptors. The apparatus indirectly heats wafers mounted on horizontally-arranged susceptors including induction heating coils to form alternate-current magnetic flux in a direction parallel to a mount face of the susceptor. The wafer are arranged at an outer circumferential side of the susceptor. The induction heating coils are structured with at least one main heating coil and subordinate heating coils electromagnetically coupled with the main heating coil.

Abstract: A surface heating system is provided. The surface heating system includes a heatable surface element with a supporting structure on which a conductive layer is arranged that is completely covered by a cover layer. A first induction coil is configured separately of the heatable surface element and is connectable to an AC voltage source.

Abstract: An induction heating apparatus according to the present invention includes: an inverter circuit which outputs an AC signal through ON and OFF operations of a plurality of switching devices; a control portion which drives and controls the plurality of switching devices; and a plurality of resonant circuits which includes respective resonant capacitors and respective heating coils for inductively heating an object to be heated; wherein the switching devices are driven and controlled, by using, as an operating range, a frequency range higher than a highest resonance frequency, or a frequency range lower than lowest resonance frequency, out of respective resonance frequencies of the plurality of resonant circuits, and the respective heating coils in the plurality of resonant circuits are combined to form at least a single induction heating source.

Abstract: A method and device for soldering plural electrical connections, in which contact elements have to be soldered to soldered-connection faces positioned on a non-metallic glazing. In the method a soldering tool is used to emit a magnetic field towards the solder spots to heat these by induction. The magnitude and shape of the soldering tool is sized according to the surface area over which plural solder spots that have to be heated simultaneously in a soldering operation are situated. At the same time, the frequency of an AC voltage applied to the loop or to the coil is tailored to the connection geometry and set to 150 kHz at most. Thus, for a high work rate, markedly better heating of the components that need to be soldered is obtained because the low-frequency field lines have a greater depth of penetration into the bodies.

Abstract: A heating fuser includes: a rotating member configured to heat a toner transferred onto a sheet; a first coil body configured to generate a first magnetic field for inducing eddy-current in a first area including the center in a rotation axis direction of the rotating member; second coil bodies configured to generate second magnetic fields for inducing eddy-current in second areas of the rotating member adjacent to the first area in the rotation axis direction; third coil bodies located to extend over the first and second coil bodies when viewed in a direction orthogonal to the rotation axis direction; and a driving circuit configured to drive the third coil bodies between a first state in which the third coil bodies generate magnetic fields for weakening the first magnetic field and a second state in which the third coil bodies generate magnetic fields for strengthening the second magnetic fields.

Abstract: A method of fabricating a thermoplastic component using inductive heating is described. The method includes positioning a plurality of induction heating coils to define a process area for the thermoplastic component, wherein the plurality of induction heating coils comprises a first set of coils and a second set of coils. The method also includes controlling a supply of electricity provided to the plurality of inductive heating coils to intermittently activate the coils. The intermittent activation is configured to facilitate prevention of electromagnetic interference between adjacent coils.

Abstract: A system for inductively heating a workpiece including a heating coil that surrounds the sides and ends of the workpiece, wherein the heating coil comprises a first coil assembly that encloses a first portion of the workpiece and a second coil assembly that encloses a second portion of the workpiece. A power supply is operatively connected to the first coil assembly and the second coil assembly.

Abstract: A variable width transverse flux electric inductor has a fixed powered coil section and associated box-like moveable passive coil sections that electromagnetically couple with magnetic flux generated by current flowing through the fixed powered section. The passive coil sections can be transversely moved across the workpiece to accommodate induction heating of workpieces having different widths or track movement of the workpiece. Alternatively the fixed powered coil section and associated moveable coil sections may be connected to each other through flexible connections, sliding contacts or other means, such as clamps, so that an electrical connection can be maintained between both in any relative position.

Abstract: An apparatus and process are provided for gradient induction heating or melting of a workpiece with a plurality of induction coils, each of the plurality of induction coils is connected to a power supply that may have a tuning capacitor connected across the input of an inverter. The plurality of induction coils are sequentially disposed around the workpiece. The inverter has a pulse width modulated ac power output that may be in synchronous control with the pulse width modulated ac power outputs of the other power supplies via a control line between the controllers of all power supplies.

Abstract: An induction heating cooker and a control method thereof. The induction heating cooker includes a plurality of heating coil groups, each of the heating coil groups including a plurality of heating coils connected in series, a plurality of inverters to individually supply high-frequency voltages to the heating coil groups, respectively, and a controller to control operations of the inverters such that the high-frequency voltages are supplied to the heating coil groups, respectively, based on the numbers of heating coils upon which at least one cooking container is placed within the respective heating coil groups. Therefore, it is possible to effectively heat the cooking container even though the container is put on any position of a cooking plate irrespective of a specific position of the cooking plate. Also, it is possible to effectively heat the container regardless of the size of the container.

Abstract: An induction module and an arrangement of several such induction modules is provided, typically having several power electronics modules for controlling in each case at least one induction coil in a housing. A control unit is also provided in the housing. The control unit and the overall arrangement are configured for operation with a synchronization bus system, which is used for connecting to other induction modules in an arrangement.

Abstract: A variable-size induction heating plate includes a plurality of windings (10a, 10b, 10c, 10?a, 10?b, 10?c) arranged in a cooking surface. The heating plate includes two sets (10, 10?) of a plurality of windings arranged side-by-side, each set (10, 10?) of windings being adapted in such a way as to form a heating plate, and control elements (12, 12?, 13) which are adapted in such a way as to control the operation of the sets (10, 10?) both in an independent manner and a synchronous manner. Each set of windings is fed by a single current generator (11, 11). The inventive heating plate can be used in an induction cooking surface.

Abstract: A coated member includes a substrate and a coating layer over the substrate where the coating layer includes at least one of ferromagnetic and magnetic particles dispersed in a binder. The member, which is suitable for use in an electrostatographic printing process, can be in the form of a fuser member, a fixing member, a pressure roller, or a release agent donor member.

Abstract: The present invention relates to a device including a body to be heated to which a magnetic field is supplied to generate heat and which heats a developer on a material to be recorded, a plurality of coil bodies which generate an induced heat in the body to be heated from the outside of the body to be heated and which include litz wires having cross sections formed in rectangular shapes and which are disposed in a longitudinal direction of the body to be heated, and a pressure applying member which contacts the body to be heated in a predetermined position and which fixes the developer on the material to be recorded passing between the pressure applying member and the body to be heated.

Abstract: The image heating apparatus includes a heating member, a first coil unit having a first holder in which a first excitation coil is sealed, the first excitation coil being provided for generating a magnetic field to induce an eddy current in the heating member, and a second coil unit having a second holder in which a second excitation coil is sealed, the second excitation coil being provided for generating a magnetic field to induce an eddy current in the heating member. The image heating apparatus having such structure enables easy assembly work while being capable of conducting nonuniform heating.

Abstract: A method of manufacturing a coil unit includes the first step of disposing a coil between a first frame and a second frame, the second step of pouring liquid resin into between the first frame and the second frame with the coil disposed therebetween, and the third step of curing the liquid resin to thereby fix the first frame, the second frame and the coil to one another.

Abstract: An apparatus and process are provided for controlling the cross sectional temperature profile of a continuously moving workpiece with an induction coil assembly that provides for a combination of longitudinal and transverse magnetic flux field heating of the workpiece. The induction coil assembly includes means for laterally moving the workpiece in and out of the coil assembly without movement of the coil assembly.

Abstract: An apparatus and process are provided for reducing the electromagnetic field intensity in selected regions for a field produced when ac current flows through one or more induction coils through which a workpiece moves for induction heating of the workpiece. The electromagnetic shield has transverse screen elements through which the workpiece moves at opposing ends of the one or more induction coils. One or two longitudinal screen elements connect the transverse screen elements.

Abstract: A rectifier/inverter power supply for use with induction heating or melting apparatus includes a tuning capacitor connected across the output of the rectifier and input of the inverter. The tuning capacitor forms a resonant circuit with an inductive load coil at the operating frequency of the inverter. Additionally, the load coil may be formed from an active load coil connected to the output of the inverter and a passive load coil, in parallel with a resonant tuning capacitor.

Abstract: The invention relates to an antenna radiation heating (2) to heat a matter by means of resonance with several surface antenna elements (3), each consisting of a carrier surface material (11) and a radiation coating (10) applied thereon which is delimited by two spaced electrical conductors (14, 15) in parallel, with electrical contact as antenna limiter and with which high-frequency electromagnetic radiation can be emitted. Furthermore, this antenna radiation heating (2) comprises a harmonic generator which is coupled to the two electrical conductors (14, 15) of a surface antenna element (3) for an excitation of the radiation coating (10) for emitting an oscillation spectrum within the range of molecular natural frequencies of the matter to be heated. In accordance with the invention, the radiation coating (10) is unilaterally applied to the carrier surface material (11) and forms an element front facing a matter to be heated.

Abstract: The invention provides an improved induction heating coil, an induction heating device including the induction heating coil and a method for heating a workpiece with the induction heating device. The induction heating coil for heating a workpiece includes an elongated solenoid-type induction heating coil and at least one pancake-type coil positioned within a portion of the elongated solenoid-type induction heating coil, where the solenoid-type coil and the pancake-type coil are in electrical connection with each other.

Abstract: An induction heating apparatus used as a fixing apparatus of a copying machine, a printer, and the like includes a first coil for generating a magnetic field to induce an eddy current in a heating member, a second coil for cancelling the magnetic field generated by the first coil, and a third coil connected to the second coil and wound in a direction opposite from the winding direction of the second coil. The induction heating apparatus permits an efficient use of power.

Abstract: The present invention relates to an image heating apparatus in which a driving member drives a film at a first speed when driving is started and then drives film at a second speed, and the first speed is lower than the second speed.

Abstract: A process for heat treating steel wires in which the wires are passed through an induction furnace with induction coils connected in series to a common power supply. No more than one wire passes through any one of the induction coils. The wires are heated to their Curie temperature, where the wires become non-magnetic. This makes the process substantially self-regulating. If one or more wires are heated more rapidly than others, little if any heating of the more rapidly heated wires will occur after they reach their Curie temperature, and all wires will leave the inductive heating furnace at or near their Curie temperature. The system will operate satisfactorily with one or more wires missing. When this happens, for loading purposes or other reasons, the efficiency of the unit degrades but sufficient excess power remains such that heating of the wires that are passing through the system will be relatively unaffected at the design mass flow rate.

Abstract: An inductor module for disposition below a cooking area plate of an inductor cooking area is disclosed. The inductor module includes a plate-shaped substrate and at least two inductor coils including a first inductor coil and a second inductor coil formed as flat conductor tracks mounted on opposed sides of the plate-shaped substrate. The inductor coils are further disposed spaced apart from and one above the other.

Abstract: A fixing device of the present invention includes a first roller that is made of a conductive material, and is rotated and driven; a second roller that is in contact with the first roller in the pressed state; and an induction heating unit that is arranged at the first roller side and concentrates the induction heating to the nip portion of the first roller and change a developer image formed on a fixing medium to a fixed imaged. This induction heating unit of the fixing device is made of a high permeable material, has a core that is open at the surface opposite to the first roller and a coil wound round the core and generates magnetic flux on the core when high frequency current is supplied to the core and has a high projecting portion so that a part of the core closes the first roller.

Abstract: An image heating apparatus has a heat generating element with an electroconductive portion; a magnetic flux generating unit for generating a magnetic flux, wherein the magnetic flux generated by the magnetic flux generating unit produces eddy current in the heat generating element to heat the heat generating element; a back-up member cooperating with the heat generating element to form a nip therebetween, wherein the nip feeds a recording material carrying an image; a pressing member for applying pressure to the nip; a holding member of metal for holding a pressure by the pressing member; and a shield member provided between the magnetic flux generating unit and the holding member, for shielding magnetic.

Abstract: A godet for heating an advancing synthetic filament yarn is provided, the godet comprising a plurality of stationary primary windings and, with respect thereto, a magnetically conductive, rotatably supported godet jacket. The godet jacket is coupled with the primary windings via a defined radial clearance extending between same and the side walls of the primary winding carrier for generating induced currents. The carriers are constructed such that their transformer sheets radially overlie each other in the region of their channel bottom, thereby shielding the magnetic flux outward, in particular toward the coil support.

Abstract: According to the invention, the rear end of a preceding metal piece and a front end of a succeeding metal piece are heated, pressed and joined prior to the finishing hot rolling. An alternating magnetic field running through the metal pieces in the thickness direction thereof is generated in an end region on opposed faces of the respective metal pieces to perform heating. Another alternating magnetic field whose direction is reverse with respect to that of the former alternating magnetic field is partially generated in the end region on the opposed faces of the metal pieces and in either a region where the metal pieces exist or a region outside width ends of the metal pieces. This assures a uniform heating of the end region on the opposed faces of the metal pieces over their full width to reliably join the both metal pieces to each other.

Abstract: The present invention provides a circuit for heating a heating element to a desired temperature and generating an output from a single common AC power source. First, the AC power is rectified. An inductor and a capacitor form an L section type filter for the DC from the rectifier. The inductor and the capacitor have a resonate frequency that is greater than the AC power frequency. A switch is connected to the heating element. Next, a controller receives a signal that indicates the actual temperature of the heating element along with an indication of the desired temperature. The controller generates an error signal that PWMs the switch thereby controlling the heating element. Another switch is connected to a transformer. A separate controller PWMs the second switch generating the output at the secondary side of the transformer. The two controllers use a pulse width modulating frequency that is greater than the resonate frequency of the inductor and capacitor.

Abstract: An induction heating apparatus for heating continuous strip material. In a first embodiment, two coil sections each having a gap at one end for the strip material to pass edgewise into and out of the apparatus for heating wherein the coil sections are adapted for connection to two power supplies such that the first power supply connects through one half-turn of each of the coil sections, and thence to the second power supply, which is connected through the second half-turns of the respective coil sections and back to the first power supply, all in series. In a second embodiment, the coil sections are adapted for connection to four power supplies in series; each power supply connected to a respective half-turn of the coil sections, such that one half-turn is connected between each of the four power supplies. The series connection ensures uniform amplitude and phase of the electrical current applied to the induction heating coil apparatus.