A cooking appliance, as provided herein, may include a cabinet, a magnetron, an induction heating coil, and a one-way field filter. The cabinet may define a cooking chamber. The magnetron may be mounted within the cabinet in communication with the cooking chamber to direct a microwave thereto. The induction heating coil may be mounted within the cabinet to direct a magnetic field thereto. The one-way field filter may be disposed within the cabinet between the induction heating coil and the cooking chamber to restrict passage of the microwave therethrough while permitting the magnetic field. The one-way filter may include a lower layer and an upper layer. The lower layer may include a plurality of parallel conductive bands extending in a first direction. The upper layer may be disposed above the lower layer. The upper layer may include a plurality of parallel conductive bands extending in the second direction.

An inductive heating device heats an aerosol-forming substrate including a susceptor. The device includes a device housing, a DC power source for providing a DC supply voltage and a DC current, power supply electronics including a DC/AC converter, the DC/AC converter including an LC load network including a series connection of a capacitor and an inductor having an ohmic resistance, a cavity in the device housing for accommodating a portion of the aerosol-forming substrate to inductively couple the inductor of the LC load network to the susceptor. The inductor is embedded in the device housing at a proximal end of the device housing to surround the cavity which is also arranged at the proximal end of the device housing. A microcontroller determines from the DC supply voltage and the DC current an apparent ohmic resistance, and from the apparent ohmic resistance the temperature of the susceptor.

Disclosed herein is a cooking apparatus including a cooking plate, induction heating coils installed under the cooking plate, a vessel sensor configured to detect a cooking vessel while the cooking vessel is placed on the cooking plate, a driving assembly including a driving circuit configured to generate a driving current and distribute the driving current to each of the induction heating coils, and a sub assembly including a vessel sensing circuit configured to determine one or more of the induction heating coils overlapping the cooking vessel based on an output of the vessel sensor. The sub assembly may be separated from the driving assembly.

The present invention relates to a method for controlling a cooking zone (16) of an induction cooking hob, wherein said cooking zone (16) comprises at least one induction coil (16) and is supplied by a generator (14) including a power switch. The method is performed by controlling the power switch by a gate driving signal (18) including a deactivation pulse length (Toff) and an activation pulse length (Ton). A switching period (T) of the gate driving signal (18) is given by the sum of the activation pulse length (Ton) and deactivation pulse length (Toff). A driving frequency (f) of the power switch is the reciprocal value of said switching period (T). The deactivation pulse length (Toff) depends on the resistance (28) and the inductance (30) of the induction coil (16). The activation pulse length (Ton) is varied according to a requested power for the cooking zone (16). A series of constant activation pulse length (Ton) is activated in order to determine the optimal deactivation pulse length (Toff).

An induction heating device includes a working coil, an inverter, an inverter driving unit configured to apply a switching signal to the inverter to enable the inverter to perform a switching operation, a control unit configured to generate and apply a control signal to the inverter driving unit to cause the inverter driving unit to generate the switching signal based on the control signal, and a determination unit configured to determine a type of an object disposed on the induction heating device based on (i) a first resonant current value measured from the working coil in response to operation of the inverter by the switching signal having a first operation frequency and (ii) a second resonant current value measured from the working coil in response to operation of the inverter by the switching signal having a second operation frequency.

A method for operating an induction cooking hob including a plurality of inductors in association with induction resonant inverters operating in load-dependent frequency ranges includes a simultaneous activation of inductors, in at least one phase of the control period, independently from their association to one or more overlying cooking utensils but only according to at least partial overlapping of associated operating frequency ranges.

Cookware, and an induction cooking system including the cookware, can include a container, a base layer, and a susceptor layer. The container and the base layer can be non-magnetic at room temperature, while the susceptor layer is magnetic at room temperature and has a Curie temperature at which the susceptor layer becomes non-magnetic. During heating of a material within the container, the base layer functions as a passive heat exchange to transfer heat across the susceptor layer, thereby decreasing a range of temperatures across the susceptor layer. Further, during the heating, the base layer conducts an electric current when the susceptor layer approaches a leveling temperature and/or the Curie temperature of the susceptor layer, thereby decreasing an amount of heat produced and resulting in a more even heating of the material.

An induction cooking apparatus including a coil beam assembly, an inverter assembly, and a heatsink. The coil beam assembly includes one or more induction coils. The inverter assembly includes a first circuit board that is electrically connected to the induction coil(s) such that the inverter assembly is configured to supply electricity to the induction coil(s). The heatsink has a beam-like structure and is attached to both the coil beam assembly and the inverter assembly. The heatsink is positioned above the inverter assembly and below the coil beam assembly such that the heatsink is the sole support structure for the inverter assembly. A method for assembling the induction cooking apparatus is also described.

An induction heating device includes a case, working coils, a cover plate, an input interface, a first control module configured to detect one or more of the working coils at a position of an object seated on the cover plate, a second control module configured to receive information on the position of the object and control the input interface to display an image of a heating zone, and light emitting elements disposed below a periphery of each of the plurality of working coils. The second control module is configured to analyze an arrangement form of the one or more of the working coils based on the information on the position of the object, and control driving of at least one of the light emitting elements based on a result of analyzing the arrangement form.

An induction heating device for a shrink-clamping and/or unshrink-unclamping of tools into and/or from tool holders, in particular an induction heating unit of a shrink-clamping and/or unshrink-unclamping station for tools, comprises an induction heating unit comprising at least one induction coil which is configured to expand, by heating, at least a portion of the tool holder during a shrink-clamping and/or unshrink-unclamping process, and includes at least one shielding unit which is at least configured for a shielding of an induction magnetic field generated by the induction heating unit at least substantially at least in an axial direction of the induction coil, wherein the induction heating unit and the shielding unit form structural units which can be operatively decoupled from each other and can thus be moved relative to each other at least in the axial direction.