An anti-ice arrangement for a gas turbine engine may comprise an engine static structure, a fan blade housed for rotation within the engine static structure, and a magnetic field source mounted in close proximity to the fan blade and configured for inducing eddy currents in the fan blade to increase a surface temperature of the fan blade.

A rotary heating apparatus to heat evenly symmetrical and/or non-symmetrical workpieces. A rotatable shaft holds directly or indirectly one or more workpieces. The shaft has a first major central elongated axis. An induction coil providing a magnetic field and has a second major central elongated axis. The coil is fabricated with an open space in a side of the coil. The open space is configured and dimensioned to accommodate the passage of the shaft while avoiding contact between the shaft and any portion of the coil. The shaft is arranged so that said first major axis is positioned perpendicular to the second major central elongated axis. The shaft rotates workpieces within the coil in a plane which includes the second axis or in a plane which is parallel to the axis so that the rotating workpiece crosses through multiple lines of flux of the magnetic field to ensure even exposure of the workpiece to the magnetic field provided by the coil for consistent uniform heating of the workpiece regardless of different thicknesses of the workpiece.

A method for joining a carburized steel workpiece to a cast iron workpiece is provided that includes tempering a localized area of the carburized steel workpiece, machining the localized area to reduce carbon content, and welding the carburized steel workpiece to the cast iron workpiece at the localized area. The tempering may be performed by induction heating and results in a hardness profile of the localized area of less than 50 HRC.

The invention relates to a method and a heating device (1c) for inductively heating a stator (2) or armature (3) of an electric machine, in particular before and during trickle impregnation thereof. In addition, the invention relates to an impregnating device (50) in which this heating device (1c) is integrated. According to the invention, it is provided that the heating takes place inductively by means of electromagnetic fields of different frequencies. For this purpose, it is provided in the case of the heating device (1c) that it has at least one electromagnetic inductor (18, 21, 24) which is disposed coaxially or axially parallel with respect to the longitudinal axis (7) of the stator (2) or armature (3) and which inductively heats said stator or armature, and that the at least one inductor (18, 21, 24) is designed to generate at least two electromagnetic fields of different frequencies.

An induction heating device having a control box, a magnetic core provided with at least one inductor fed with a current by a power electronics that is controlled by a control circuit, the power electronics and the control circuit being disposed in the control box, a removeable closing yoke for completing the magnetic circuit of the magnetic core, and a plurality of temperature sensors. A plurality of metal articles are simultaneously heated so as to each reach a target temperature and according to a heating cycle during which the temperatures sensors monitor the temperatures of the plurality of the metal articles so that each metal article is connected to a temperature sensor that is not connected to any other metal article.

An apparatus for heating and impelling a fluid may comprise a housing, and an air heating impeller assembly positioned in the housing and configured to impel and heat the fluid moving through the housing. The air heating impeller assembly may comprise a support shaft, and a plurality of disks on the support shaft and spaced from each other to form fluid flow gaps therebetween. A disk may comprise a hub portion, an annular portion located radially outward from the hub portion, and a plurality of spoke portions connecting the annular and hub portions. The hub, annular and spoke portions of a disk may be formed of an integral part. A magnetic assembly may be configured to apply a magnetic field of adjustable intensity to the disks.

According to an embodiment, an induction heating coil includes a heating conductor portion which is formed of a conductor member and has a zigzag shape in which a bent portion opened to one side in a first direction and a bent portion opened to the other side in the first direction are alternately continuously arranged in opposite directions along a second direction crossing the first direction.

Provided is a heat treatment method for a cam piece, and the cam piece has an insertion hole into which a cam shaft is inserted, a base portion configuring a base circle of a cam, and a nose portion configuring a cam ridge. The heat treatment method for the cam piece includes: a first step of using a jig formed into a shape having a cavity, the jig being inserted into the insertion hole such that the cavity is located between an inner circumferential surface of the nose portion of the cam piece and a central axis of the jig; and a second step of heating the cam piece from an outer circumferential surface side by high-frequency induction heating in a state in which the jig is inserted in the insertion hole of the cam piece.

A laundry treating apparatus includes a cabinet, a drum provided inside the cabinet and formed of a metal material for accommodating a treatment target, and an induction module spaced apart from an outer circumferential surface of the drum at a predetermined interval, inducing and heating the drum, where the induction module includes a base housing for accommodating a coil, a permanent magnet housing coupled with the base housing and provided with a holder in which a permanent magnet is accommodated, and a cover housing coupled with the permanent magnet housing, and the cover housing is coupled to the permanent magnet housing and therefore the permanent magnet is located between the permanent magnet housing and the cover housing. A joint force of the induction module may be enhanced to improve durability, and noise caused by vibration of a tub may be avoided.

Apparatus to heat and transfer mainly metal materials to a melting furnace (12), the apparatus comprising a transporter device (13) configured to move the materials continuously to the melting furnace (12), and at least an induction heating unit (28) associated with the transporter device (13) and configured to heat by electromagnetic induction the materials moved in the transporter device (13), keeping them in a solid state.