Abstract: An induction heating apparatus for heating a traveling metal plate includes an induction coil for surrounding the metal plate. The induction coil includes an upper induction coil for being located above the metal plate and a lower induction coil for being located below the metal plate. The upper and lower induction coils are spaced from each other in a longitudinal direction of the metal plate a constant distance across a transverse direction of the metal plate. Each of the upper induction coil and the lower induction coil is arranged obliquely at an edge area of the metal plate so as to form an oblique angle with the transverse direction of the metal plate.

Abstract: An induction heating device and method are disclosed. The device may include a support plate and a coil assembly and a plurality of ferrite bars or the like interposed between the coil assembly and the support plate. Additionally, a central polymeric element may be directly in contact with and interposed between the coil assembly and the support plate. The central element may have a plurality of radial seats configured for engagement with at least one end of the ferrite bars, the seats are configured to locate the bars in a predetermined position.

Abstract: A method for heating surfaces includes heating the surface of a hole by inserting a magnet cylinder into the hole and rotating the magnet cylinder, heating the surface of a hole by inserting a magnet stack into the hole and reciprocating the magnet stack, or heating a selected area of a workpiece surface by positioning a magnet disc adjacent the selected area and rotating the magnet disc. In each case, eddy currents are produced, inducing heating of the surface.

Abstract: An improved melting furnace including a crucible and a plurality of parallel conductors of identical height surrounding the crucible having at least one descending portion (9) and one ascending portion (10). The benefit from this arrangement is that the conductors all have a portion located at each heating height which guarantees density uniformity of the currents flowing in the conductors even if the load of the crucible has superimposed regions for which the electrical resistivity is different.

Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.

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: An electromagnetic oven may include a housing and a food heating chamber carried by the housing. The food heating chamber may have a pair of opposing ends with an enlarged width medial portion therebetween. The electromagnetic oven may include a radio frequency (RF) source carried by the housing, and a spirally wound electrical conductor surrounding the food heating chamber and coupled to the RF source. The spirally wound electrical conductor may be configured to generate magnetic fields within the food heating chamber that are parallel with an axis thereof.

Abstract: A system and method of induction heat treating a gear includes a workstation. The workstation has a power source, an inductor coil, and a rotational mechanism. The gear is induction heat treated at a first portion of the gear and a second portion of the gear remains untreated by induction hardening. The gear has an inner surface. The inner surface includes the first portion and the second portion. The first portion has a first width. The second portion has a second width. The inductor coil includes at least one heating loop and at least one non-heating loop. The inductor coil is energized to a predetermined frequency to create an alternating magnetic field, where the alternating magnetic field developed in the heating loop induces an eddy current in the first portion of the gear.

Abstract: An inductive heater humidifier for heating fluids is provided by the present disclosure. The humidifier includes a reservoir having a ferromagnetic bottom plate. The reservoir is disposed on top of a non-metallic cover plate, which rests on a topless ferrite base. The ferrite base includes induction coil for generating heat. The induction coil is energized to produce eddy currents that generate heat, which is convectively transferred to the reservoir via the bottom plate to heat fluid in the reservoir.

Abstract: The succesful use of lithium vapor in an extreme ultraviolet (EUV) light source depends upon an intense localized heat source at the center of conical structures that evaporate, condense and re-supply liquid lithium. Induction heating of a hollow structure with toroidal topology via an internal helical field coil, can supply intense heat at its innermost radius. The resulting slim radio frequency heated structure has high optical transmission from a central EUV producing plasma to collection mirrors outside of the structure, improving EUV source efficiency and reliability.

Abstract: A magnetic induction heater uses a stationary target which is electrically conductive. A plurality of stationary magnets with fixed poles are positioned near the target to induce at least a first and a second magnetic field in the target, where the first and second magnetic fields are different. A shuttering device alternately blocks or allows the magnetic fields from the magnets to reach the target. The shuttering device is activated to alternately allow and block the first and second magnetic fields from the target, such that the target is exposed to varying magnetic fields to produce heat.

Abstract: An apparatus for heating a target comprises a radio frequency heating fork having two substantially parallel tines, the substantially parallel tines electrically connected at a loop end of the radio frequency heating fork, and the substantially parallel tines separated at an open end of the radio frequency heating fork, and a feed coupler connection, the feed coupler connection connecting a power source across the substantially parallel tines of the radio frequency heating fork. The application of power across the substantially parallel tines of the radio frequency heating fork results in induction heating near the loop end of the radio frequency heating fork, and dielectric heating near the open end of the radio frequency tuning fork. A target can be positioned relative to the heating fork to select the most efficient heating method. The heating fork can provide near fields at low frequencies for deep heat penetration.

Abstract: A heat generator comprises a rotatable magnetic field and a heat exchanger (26) including a fluid path (45) for water set into an electrically conducting disc. An entry to and exit from the fluid path is provided for the water. Heat generated by rotating the magnetic field is transferred to water passing though the fluid path in the electrically conducting disc.

Abstract: An induction heating unit enabling to attaching coil on coil attaching surface of bobbin with a high degree of accuracy, and a fixing device capable of maintaining the distance between the coil and the member to be heated at a high degree of accuracy, ensuring uniformity of temperature distribution of the member to be heated, rising temperature at a high speed, and enhancing quality of fixation. In an induction heating unit 30 including a magnetizing coil 39 attached on a coil bobbin 38 which is disposed outside of annular body 19 to be heated, the unit including: a layer of elastic adhesive 44a provided on the outer surface of the coil bobbin 38; a magnetizing coil 39 provided on the layer of elastic adhesive 44a, the magnetizing coil 39 being wound beforehand following an attaching surface; and a layer of elastic adhesive 44b provided on the magnetizing coil 39.

Abstract: An induction cookware comprising: a cooking body containing an inner pot inside, an insulation material disposed between the cooking body and the inner pot for maintaining the temperature of the inner pot. An induction coil is disposed in the bottom of the cooking body and with an extra magnetic field, the induction coil can generate AC current. The current flows through an electric heating tube connected to the bottom of the inner pot so as to heat the heating tube. Thereby, the heating tube directly transfer the heat to the inner pot for reducing the heat from transpiration. The structure of a cooking body with an inner pot inside can heat and slow cook the food inside the inner pot simultaneously, thus can add the delicious taste of the food and save the energy.

Abstract: A method and apparatus for the fabrication and/or repair of an integrally bladed rotor, specifically of an integrally bladed gas turbine rotor, is disclosed. At least one rotor blade is joined to a main rotor body for fabrication and/or repair. The joining is carried out by diffusion welding.

Abstract: An apparatus for heating and impelling air comprises a housing, an air heating impeller assembly, and a magnetic assembly. The impeller assembly may impel air through the housing and heat the air, and may include a support shaft, a plurality of annular disks positioned along the support shaft and each having a central aperture through which the support shaft extends. The impeller assembly includes paddles radiating outwardly from the shaft, and each of the paddles is positioned between the shaft and the disks to space at least one disk from the support shaft to form an air path therebetween. The paddles space the disks in an axial direction to form gaps therebetween to form an air path between the disks. The magnetic assembly applies a magnetic field of adjustable intensity to the disks to cause heating of the disks.

Abstract: The present application in particular is directed to an induction coil assembly 2 adapted for an electric induction hob of a household or industrial type appliance. The induction coil assembly 2 comprises at least one induction coil 5 which has at least one of ovoid and coiled ovoid windings 6.

Abstract: A high frequency electromagnetic induction heating device includes a power supply, a high frequency electromagnetic induction coil and an electromagnetic guide sleeve. The high frequency electromagnetic induction coil has two electrodes which are electrically connected with the power supply. The electromagnetic guide sleeve is disposed around the high frequency electromagnetic induction coil, and has an opening exposing the high frequency electromagnetic induction coil, wherein the opening faces towards a surface to be heated.

Abstract: The invention relates to a device for curing a plastic material, in particular a sealing compound and/or a filling compound for tolerance adjustment or gap filling, respectively, wherein the plastic material is at least partly inserted in a gap area between two components, and wherein at least one of the components is made of a fiber reinforced plastic material, in particular of a carbon fiber reinforced epoxy resin. According to the invention the device is provided with at least one electromagnetic inductor for a locally defined heating of the gap area and for curing the plastic material arranged in the gap area. Due to the electromagnetic inductor which might be a linear inductor or a circular inductor a contact-less and fast curing of the plastic material is possible.

Abstract: In a method of heating a stator, a first induction coil is disposed near one of the coil ends of the stator, and a second induction coil is disposed near the other, and the first induction coil and the second induction coil are electrically energized, whereby the induction-heating of the stator is performed as a pre-heating step prior to the resin molding step of the coil ends. According to this method, a first movement unit for moving the first induction coil and a second movement unit for moving the second induction coil are provided, the first induction coil is moved by the first movement unit and the second induction coil is moved by the second movement unit for induction-heating of the stator.

Abstract: An induction heating coil for stably heating a steel tube which is being fed in its axial direction without rotating, the heating being uniform in the circumferential direction and in a narrow range in the axial direction has at least two 1-turn coils in the form of a first turn coil body and a second turn coil body. The inner peripheral length Ln (the non-effective coil length) where the effective number of coil turns is less than the total number of coil turns when the coil is projected in the axial direction and the inner peripheral length L0 of the projected coil bodies (the inner coil length) satisfy Ln/L0<0.05. First and second coil bodies have insulating portions on their connecting portions, and the insulating portions are present in locations separated by a central angle of 5-45° measured from the center of the coil bodies.

Abstract: An inductor for induction hardening of a metallic rod-shaped toothed rack, wherein a first outer surface of the toothed rack provided with the teeth is substantially planar and a remaining second outer surface of the toothed rack in cross-section is profiled, wherein the inductor has a substantially rod-shaped first inductor element that extends parallel to a longitudinal axis of the toothed rack. The first inductor element extends across an entire length of the toothed rack to be hardened along the first outer surface provided with the teeth and hardens the first outer surface of the toothed rack. The toothed rack and the inductor during the hardening process are arranged stationarily.

Abstract: An image heating apparatus for heating an image on a recording material, includes a rotatable heat generation member capable of induction heat generation by a magnetic flux; a coil, provided outside the heat generation member, for generating the magnetic flux for the induction heat generation; a movable magnetic core provided at a position opposed to the coil; a moving device for moving the magnetic core between a first position opposed to the coil and a second position which is more away from the coil than the first position; and an electroconductive member mounted at a position where a magnetic circuit is capable of being formed with the coil when the magnetic core is in the second position.

Abstract: Apparatuses useful for printing and methods of fixing marking materials onto media are disclosed. An exemplary embodiment of the apparatuses useful in printing includes a first member including a first surface; a second member comprising at least one ferromagnetic material having a relative magnetic permeability greater than 1, a susceptor over the at least one ferromagnetic material, the susceptor comprising at least one electrically resistive metal, and a second surface over the at least one ferromagnetic material and the susceptor, the second surface forming a nip with the first surface at which media are received; and a magnetic field generator for generating a magnetic field to inductively heat the second member.

Abstract: In an induction heating body 1 in which heat is generated by eddy current induced by a high-frequency magnetic field, when forming a radially-directed separation section 31 separated from the center to the outer periphery, one of end brim parts 31a1 is superimposed on the other end brim parts 31a2 or they are close to each other with the end surfaces thereof 31b1 and 31b2 being abutted.

Abstract: Provided is an induction heating method implemented in a device for heating a metal part, the device including magnetically coupled inductors. Oscillating circuits of the device have at least approximately the same resonance frequency, each inverter is controlled by a control unit to vary amplitude and phase of current passing through the corresponding inductor, the device also including a means for determining said current and an actual temperature profile of said part. The method includes: a) comparing said actual temperature profile with a reference temperature profile and calculating a reference power density profile; b) calculating target currents which the inverters must produce in order for the currents of the inductors to reach suitable target values; c) determining the currents passing through the inductors to compare said currents with said target values and determine correction current deviations, and sending correction instructions to said control units in accordance with said current deviations.

Abstract: Improved induction heating methods are presented for induction hardening undercut fillets of crankshafts or other workpiece recesses or undercuts in which an active turn is energized to induce current in a passive turn translated toward a workpiece undercut for heating the undercut.

Abstract: Improved induction coil apparatus and methods are presented for induction hardening undercut fillets of crankshafts or other workpiece recesses in which an active turn is energized for heating a journal area in the workpiece recess and one or more passive turns are translated toward undercut fillets once the coil assembly is moved toward the recess with coupling portions of the passive and active turns coupling energy from the active turn to the passive turn(s) for heating the undercut fillets.

Abstract: A die casting system includes a die, a shot tube, a shot tube plunger and a melting unit. The die includes a plurality of die components that define a die cavity. The shot tube is in fluid communication with the die cavity. A shot tube plunger is moveable within the shot tube to communicate a charge of material into the die cavity. The melting unit is positioned relative to the die and includes a bottom portion having an opening for selectively releasing a charge of material through the bottom portion.

Abstract: A tool for local heat treatment of a metallic structural part includes a first inductor arranged above a first side of a region of the structural part undergoing local heat treatment at a first distance to the first side, and a second inductor arranged at a second side of the region in opposition to the first side. At least one of the first and second inductors has induction loops arranged in the shape of a meander.

Abstract: It is disclosed and induction furnace (1) comprising: a box-like housing structure (2, 6), which defines an internal chamber (3) of the induction furnace (1); an infiltration crucible (7) housed in the internal chamber (3) and comprising a first (10) and second (11) essentially mutually parallel and spaced away radiation plates, made of susceptor material, and an infiltration chamber (13), which is interposed between the radiation plates (10, 11) in order to be heated by the plates, the infiltration chamber being provided for housing a semifinished workpiece (14), to be subjected to infiltration, and infiltration material (15); at least an induction coil (L1, L2) housed in the internal chamber (3) to be supplied with at least an electrical current (i1, i2) for induction heating of the radiation plates (10, 11).

Abstract: A fixing device according to an embodiment of the invention is provided with a center coil and a side coil to induction heat a metal roller which supports a belt. An auxiliary pressurizing member which is adjacent to an opposing roller which supports the belt and presses the belt against a heat roller is provided. The distance from the center position of induction heating of a heat roller to an entrance of a nip is equalized to the distance from the center position of induction heating of the metal roller to the entrance of the nip. The distance from the temperature reading position of the heat roller to the center position of induction heating of the heat roller is equalized to the distance from the temperature reading position of the belt to the center position of induction heating of the metal roller.

Abstract: Multiple longitudinally-oriented continuous workpieces move through separate longitudinally-oriented through-gaps in an open-box rectangular ferromagnetic material that has multiple longitudinally-oriented through-gaps. A transverse magnetic flux established in each through-gap inductively heats the workpiece moving through each through-gap. Alternatively a single longitudinally-oriented workpiece moving through a single adjustable-width longitudinally-oriented through-gap in an open-box rectangular ferromagnetic material is inductively heated by a transverse flux established in the adjustable-width longitudinally-oriented through-gap.

Abstract: An induction heating system includes an induction heating coil operable to inductively heat a load with a magnetic field, a detector for detecting a current feedback signal corresponding to a current flowing through the induction heating coil, and a controller for detecting a switching transient in the current feedback signal and determining a resonant frequency of the system based on a characteristic of the switching transient.

Abstract: An inductive heater humidifier for heating fluids is provided by the present disclosure. The humidifier includes a reservoir having a ferromagnetic bottom plate. The reservoir is disposed on top of a non-metallic cover plate, which rests on a topless ferrite base. The ferrite base includes induction coil for generating heat. The induction coil is energized to produce eddy currents that generate heat, which is convectively transferred to the reservoir via the bottom plate to heat fluid in the reservoir.

Abstract: An antenna device has an inductive transmitting antenna having a main radiation direction, a plurality of spaced apart, adjacent conductors and a reference potential terminal. The plurality of spaced apart, adjacent conductors is connected to the reference potential terminal and arranged in a predetermined distance from the transmitting antenna along the main radiation direction in a plane antiparallel to the main radiation direction.

Abstract: A permanent magnet thermal generator having a rotating chamber with an attached optionally rotational heat element in close proximity to one or more permanent magnets. The relative motion of the heat element to the magnetic flux from the magnets results in heat generation and in some cases in levitation. Clothe driers, air furnaces, water heaters and other systems incorporating a permanent magnet thermal generator are also set forth.

Abstract: A permanent magnet thermal generator having a rotating chamber with an attached heat element in close proximity to one or more permanent magnets. The relative motion of the heat element to the magnetic flux from the magnets results in heat generation and in some cases in levitation. Clothe driers, air furnaces, water heaters and other systems incorporating a permanent magnet thermal generator are also set forth.

Abstract: A device (20) for inductively heating at least one region (12, 14) of a component (10) includes a coil device (30) for generating a magnetic field in at least the region (12, 14) of the component (10) and includes an auxiliary member (40) to be configured adjacently to the component (10) in the magnetic field of the coil device (30) in such a way that the auxiliary member (40) faces the component (10) in a direction that is orthogonal or substantially orthogonal to the direction of a magnetic field that the coil device (30) can generate in the region between the component (10) and the auxiliary member (40).

Abstract: A heating coil includes at least one winding having a plurality of approach portions. Each of the approach portions is close to a workpiece surrounded by the winding. The winding defines two electrodes at two ends thereof for electric connection with a high-frequency power source. Accordingly, the workpiece can be heated more equably than that of the prior art.

Abstract: A high-frequency coil pulling holes arrangement for producing multiple silicon cores in the technical field of high-frequency coil is provided. The running electric current can be made to spread generally uniformly around each pulling hole by the diversion effect of diffluent trough or diffluent trough and subsidiary electric current guiding holes by means of changing the positions of diffluent trough and assisted by C-shaped diffluent trough and subsidiary electric current guiding holes, and alternatively by means of providing interconnected diffluent trough between two pulling holes to form barbell-like part between pulling holes at the outer end of radial diffluent troughs. Because the electric current can more uniformly spread around each pulling hole assisted by diffluent trough, it is accomplished that the current is uniformly spread around pulling holes and consequently the appearance of low quality products can be diminished.

Abstract: A method and device for heating or hardening at least an axial segment of a rotationally-symmetric surface of a work piece includes rotating the work piece about its rotational axis and moving a peripheral portion of an inductor along a longitudinal profile of the axial segment of the rotating work piece with a constant spacing between the peripheral portion and the axial segment. At least a portion of the movement of the peripheral portion is composed of a first vector component in the direction of the rotational axis and a second component extending perpendicularly to the first vector component. The peripheral portion has a length in the rotational axis direction that is less the length of the axial segment in the rotational axis direction.

Abstract: An induction heating type fusing device to reduce the size of an induction coil and an image forming apparatus having the same, and a control method thereof. The image forming apparatus includes a printing device to form an image on a recording medium, and a fusing device to fix the image to the recording medium. The fusing device includes a heating member arranged to transfer heat to the recording medium and having a main heater and a sub heater, and an induction coil having a width equal to or less than a width of the recording medium and arranged in an axial direction of the heating member to generate a magnetic field acting on the main heater. The sub heater is arranged inside the heating member to heat both ends of the main heater.

Abstract: Apparatuses useful for printing and methods of fixing marking materials onto media are disclosed. An exemplary embodiment of the apparatuses useful in printing includes a first member including a first surface; a second member comprising at least one ferromagnetic material having a relative magnetic permeability greater than 1, a susceptor over the at least one ferromagnetic material, the susceptor comprising at least one electrically resistive metal, and a second surface over the at least one ferromagnetic material and the susceptor, the second surface forming a nip with the first surface at which media are received; and a magnetic field generator for generating a magnetic field to inductively heat the second member.

Abstract: A coil fixing module is provided for fixing a coil of an electromagnetic device. The coil fixing module includes a supporting member and a fastening member. The supporting member is used for supporting the coil. The fastening member is disposed on the supporting member for clamping the coil between the supporting member and the fastening member, so that the coil is fixed with respect to the supporting member.

Abstract: The disclosure relates to cooking apparatus by induction including: at least two combustion points, each combustion point comprising at least two inductors; and a generator, connected on one side to an electric power source delivering at least two electric phases and on the other side to the inductors of the combustion points for controlling the electric power supplied to the inductors; wherein the inductors of the same combustion point are each fed by a different phase.

Abstract: To provide an arrangement structure of guide chips for high frequency induction heating coil, which structure is capable of correctly positioning the center of a journal portion or a pin portion of a crankshaft, and thereby capable of uniformly applying high frequency induction heating to the journal portion or the pin portion so as to make a hardened case uniform, and which structure is capable of performing the high frequency induction heating and hardening comparatively simply and inexpensively. An upper side guide chip 21a for high frequency induction heating coil is attached to a side plate 7 in a fixed state, and at least one of left and right side guide chips 21b and 21c for high frequency induction heating coil is arranged in the side plate 7 so as to be movable along the radial direction of a journal portion 2 or a pin portion 4.

Abstract: To provide a structure of guide chips for high frequency induction heating coil which makes it possible to correctly position the guide chips for high frequency induction heating coil in the width direction of a journal portion or a pin portion of a crankshaft and which thus makes it possible to correctly position a semi-open saddle type high frequency induction heating coil in the width direction of the journal portion or the pin portion. Each of guide chips 21a to 21c includes: respective pairs of flexible bodies 24a to 24c, which pair are respectively provided in side plates 7 and 7, and have a spring function; a pair of chips 29a and 29a which are arranged and fixed in the inside of the pair of flexible bodies facing each other; and a pair of chip fixing plates 30a and 30a which are respectively arranged and fixed in the inside the pair of chips.

Abstract: An arrangement for controlling induction coils of an induction cooking hob so as to minimize noise production resulting from intermodulation of certain frequencies of operation. The induction coils are operated in two modes, with a first mode at the same frequency fg so to produce a low intermodulation or differential frequency, or at a second mode having a high differential frequency of about 18 kHz. Alternating back and forth between said modes of operation makes it possible to reach predefined average values for the power of the induction coils for a given time period, while at the same time minimizing development of disturbing noise.