Abstract: An induction heating cooking apparatus according to an embodiment of the present disclosure includes: a plurality of heating coils each including an inner circumferential coil provided on an innermost circumferential side and an outer circumferential coil provided on an outermost circumferential side; and a supporting base that is provided below the plurality of heating coils, and support the plurality of heating coils. The supporting base is formed in the shape of a flat plate and made of a nonmagnetic body, and has a plurality of openings under the outer circumferential coil.

Abstract: A table type cooking apparatus includes: a heating coil that inductively heats an object; a power transmission coil that transmits power to a power receiving device; a housing that houses the heating coil and the power transmission coil; a top plate provided on an upper surface of the housing; and a leg portion provided on a floor surface to support the housing on a floor surface. The top plate includes: a heating area provided as an area in which the object is inductively heated by the heating coil, a power transmission area provided as an area in which power is transmitted from the power transmission coil to the power receiving device, and a work area including at least an area in which when at least one of the heating coil and the power transmission coil is in a conductive state, a surface potential of a metal object is constant.

Abstract: An induction heating cooking apparatus includes a plurality of heating coils aligned in at least one row on a flat surface, a plurality of inverter circuits each configured to supply a high-frequency current to the corresponding one of the plurality of heating coils, and a controller configured to control driving of the plurality of inverter circuits. The plurality of heating coils include a first heating coil and a second heating coil that are adjacent to each other. The controller is configured to, when a material forming a heating target loaded on an upper part of the first heating coil is a magnetic material, and a material forming the heating target loaded on an upper part of the second heating coil at least includes a nonmagnetic material, set a frequency of the high-frequency current supplied to the second heating coil higher than a frequency of the high-frequency current supplied to the first heating coil.

Abstract: An induction cooker includes a first coil, a second coil, a third coil, and a controller. Responsive to determining that a heating target placed above a first coil is formed of a magnetic material, a heating target placed above a second coil is formed of a magnetic material or a composite containing a magnetic material and a non-magnetic material, and a heating target placed above a third coil is formed of a non-magnetic material, the controller stops an operation of a first inverter circuit, causes a second inverter circuit and a third inverter circuit to operate, and sets a frequency of a third high-frequency current to be higher than a frequency of a second high-frequency current.

Abstract: A noise propagating to outside of a power conversion device is reduced. A power conversion device includes at least one external electrode, a switching element, a noise filter connected between at least one external electrode and switching element, at least one first wire to connect at least one external electrode and noise filter, a second wire to connect noise filter and switching element, and a magnetic filter attached to second wire. An attenuation characteristic A [dB] and an attenuation characteristic B [dB] satisfy a relationship of B<A, where A is an attenuation characteristic of noise filter, and B is an attenuation characteristic due to spatial coupling between at least one first wire and second wire that is located between switching element and magnetic filter.

Abstract: An induction cooker according to the present invention includes: a plurality of heating coils aligned in one row on a same plane; and a controller. The controller is configured to, when a heating target is placed over adjacent two or more of the plurality of heating coils, supply electric power to at least one, but not all, of the two or more adjacent ones of the plurality of heating coils and change, over time, the heating coils to which the power is supplied.

Abstract: An induction cooker according to the present disclosure includes a body including a top plate on which a heating target is placed, a frame formed to surround an outer periphery of the top plate, and having a discontinuous portion being electrically discontinuous from other parts of the frame, a heating coil disposed below the top plate, and configured to inductively heat the heating target, a driver circuit configured to supply electric power to the heating coil, a power transfer coil configured to transfer electric power by magnetic resonance, and a power transfer circuit configured to supply electric power to the power transfer coil, and a power receiving device including a power receiving coil configured to receive electric power from the power transfer coil by magnetic resonance, and a load circuit configured to operate by the electric power received by the power receiving coil.

Abstract: A power converter is connected between a power supply source of a first direct current power and a power supply destination of a second direct current power obtained by performing power conversion on the first direct current power. The power converter includes: a switching element; a reactor; a first diode; a first capacitor; a second diode. The reactor is connected to a first end of the switching element. The first end of the switching element and a first end of the reactor are connected to a first connection point. A cathode of the first diode is connected to a second end of the reactor. The cathode of the first diode and the second end of the reactor are connected to a second connection point. The second diode includes an anode connected to the first connection point and a cathode connected to the power supply destination.

Abstract: An induction heating cooker according to the present invention has a top plate on which a heater area indication indicating a mount position of to-be-heated object is formed, and a first coil and a second coil that are formed of an annular coil arranged below the heater area indication of the top plate, the second coil includes a first winding portion extending in a circumferential direction of the first coil, and a second winding portion spaced apart from the first winding portion and extending in the circumferential direction of the first coil, and the distance between the first winding portion and the top plate is different from the distance between the second winding portion and the top plate.

Abstract: A cooling device includes a cooling unit configured to be driven by electric power and to receive heat, a power supply unit configured to supply the electric power to the cooling unit, and a housing that accommodates the cooling unit and is attachable to a cooking container and removable from the cooking container.

Abstract: A wireless power transfer system includes an induction heating cooking apparatus including a heating coil that produces a high-frequency magnetic field, a power reception device including a power reception coil that receives power from the heating coil, a first communication device provided on the power reception device to transmit a communication signal, a second communication device provided above the induction heating cooking apparatus to receive the communication signal from the first communication device, and a notification unit that indicates whether the power reception coil is located within a predetermined region that is set in advance with respect to the heating coil, when the second communication device receives the communication signal from the first communication device.

Abstract: An induction heating cooker includes a first coil, a second coil, a third coil, a first inverter circuit configured to supply a first high-frequency current to the first coil, a second inverter circuit configured to supply a second high-frequency current to the second coil, a third inverter circuit configured to supply a third high-frequency current to the third coil, a controller, and a load determining unit configured to determine a material of a heating object, wherein when a material of the heating object placed above the first coil is a magnetic material and a material of the heating object placed above the second coil includes a non-magnetic material, the controller operates the first inverter circuit and the second inverter circuit, and stops an operation of the third inverter circuit, and controls such that a frequency of the second high-frequency current is higher than a frequency of the first high-frequency current.

Abstract: An inductive heating cooker includes a main body and a power-receiver device. The main body includes a top plate on which a heating target is placed, a heating coil provided under the top plate and configured to inductively heat the heating target, a drive circuit configured to supply electric power to the heating coil, a power transmission coil configured to transmit the electric power by magnetic resonance, and a power transmission circuit configured to supply the electric power to the power transmission coil. The power-receiver device includes a power reception coil configured to receive the electric power from the power transmission coil by the magnetic resonance, and a load circuit configured to operate by the electric power received by the power reception coil.

Abstract: A heating cooker system according to the present invention includes: an induction cooker including a first coil configured to produce a first high-frequency magnetic field for induction heating, a first inverter circuit configured to supply a first high-frequency current to the first coil, a second coil configured to produce a second high-frequency magnetic field, and a second inverter circuit provided independently of the first inverter circuit and configured to supply a second high-frequency current to the second coil; and a cooking device including a power receiving coil configured to wirelessly receive supply of electric power from the second high-frequency magnetic field when the power receiving coil is positioned in the second high-frequency magnetic field, and a cooking unit configured to be driven by the electric power received by the power receiving coil.

Abstract: A noise filter includes a first capacitor and a second capacitor which are two line-to-line capacitors. Currents flowing through the first capacitor and the second capacitor are in directions opposite to each other, and meanwhile, currents flowing through a first connection wire and a second connection wire are in the same direction and parallel to each other. Accordingly, magnetic coupling is caused between the connection wires and the line-to-line capacitors. Thus, the residual inductance of a line-to-line capacitor itself is reduced, whereby an attenuation characteristic for normal mode noise is further improved.

Abstract: An induction cooker according to the present invention includes: a plurality of heating coils aligned in one row on a same plane; and a controller. The controller is configured to, when a heating target is placed over adjacent two or more of the plurality of heating coils, supply electric power to at least one, but not all, of the two or more adjacent ones of the plurality of heating coils and change, over time, the heating coils to which the power is supplied.

Abstract: An induction heating cooking apparatus according to an embodiment of the present disclosure includes: a plurality of heating coils each including an inner circumferential coil provided on an innermost circumferential side and an outer circumferential coil provided on an outermost circumferential side; and a supporting base that is provided below the plurality of heating coils, and support the plurality of heating coils. The supporting base is formed in the shape of a flat plate and made of a nonmagnetic body, and has a plurality of openings under the outer circumferential coil.

Abstract: An induction heating cooking apparatus includes a plurality of heating coils aligned in at least one row on a flat surface, a plurality of inverter circuits each configured to supply a high-frequency current to the corresponding one of the plurality of heating coils, and a controller configured to control driving of the plurality of inverter circuits. The plurality of heating coils include a first heating coil and a second heating coil that are adjacent to each other. The controller is configured to, when a material forming a heating target loaded on an upper part of the first heating coil is a magnetic material, and a material forming the heating target loaded on an upper part of the second heating coil at least includes a nonmagnetic material, set a frequency of the high-frequency current supplied to the second heating coil higher than a frequency of the high-frequency current supplied to the first heating coil.

Abstract: In an induction cooker according to the present invention, when a heating target placed above a first coil is formed of a magnetic material, a heating target placed above a second coil is formed of a magnetic material or a composite containing a magnetic material and a non-magnetic material, and a heating target placed above a third coil is formed of a non-magnetic material, an operation of a first inverter circuit is stopped, a second inverter circuit and a third inverter circuit are caused to operate, and a frequency of a third high-frequency current is set to be higher than a frequency of a second high-frequency current.

Abstract: A table type cooking apparatus includes: a heating coil that inductively heats an object; a power transmission coil that transmits power to a power receiving device; a housing that houses the heating coil and the power transmission coil; a top plate provided on an upper surface of the housing; and a leg portion provided on a floor surface to support the housing on a floor surface. The top plate includes: a heating area provided as an area in which the object is inductively heated by the heating coil, a power transmission area provided as an area in which power is transmitted from the power transmission coil to the power receiving device, and a work area including at least an area in which when at least one of the heating coil and the power transmission coil is in a conductive state, a surface potential of a metal object is constant.