A radio frequency inductive heating apparatus includes a control device, a plurality of radio frequency devices, a plurality of transformers, a resonant tank circuit, a heating element, and a first power supply. The radio frequency devices are selectively activated by the control device, and each of the plurality of radio frequency devices is operatively coupled to of the plurality of transformers. At least one of the plurality of radio frequency devices are selectively activated by the control device based on a power set signal and a feedback signal, the power set signal representing a desired output current associated with the resonant tank circuit, the feedback signal representing an electrical control parameter associated with the resonant tank circuit. A corresponding method is also disclosed.
An induction coil assembly associated with controlling the flow of molten material used in casting or deposition of precious and/or non-precious metals on a substrate is disclosed. The assembly comprises one or more induction coils associated with induction melting of electrically conductive material by applying a predetermined current value. The assembly further comprises a crucible comprising the electrically conductive material in which an electromagnetic field is generated therein by the predetermined current value applied to the induction coils. The electromagnetic field associated with the electrically conductive material is modulated; and is used to generate smaller units of the electrically conductive material by interrupting velocity of a flow of the material in order to produce grains or apply layers on the substrate. Corresponding methods are also disclosed.
An induction coil assembly associated with controlling the flow of molten material used in casting or deposition of precious and/or non-precious metals on a substrate is disclosed. The assembly comprises one or more induction coils associated with induction melting of electrically conductive material by applying a predetermined current value. The assembly further comprises a crucible comprising the electrically conductive material in which an electromagnetic field is generated therein by the predetermined current value applied to the induction coils. The electromagnetic field associated with the electrically conductive material is modulated; and is used to generate smaller units of the electrically conductive material by interrupting velocity of a flow of the material in order to produce grains or apply layers on the substrate. Corresponding methods are also disclosed.
B22D 39/00 - Équipement pour l'alimentation en métal liquide en quantités bien définies
B22F 3/115 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet par pulvérisation de métal fondu, c.-à-d. frittage par pulvérisation, moulage par pulvérisation
F27D 11/06 - Chauffage par induction, c.-à-d. dans lequel le matériau à chauffer ou son contenant, ou bien les éléments incorporés dans celui-ci, constitue le secondaire d'un transformateur
H05B 6/30 - Dispositions pour la refonte ou pour la fusion d'une zone
4.
Radio frequency heating apparatus using direct-digital radio frequency power control and fine-tune power control
A radio frequency inductive heating apparatus includes a control device, a plurality of radio frequency devices, a plurality of transformers, a resonant tank circuit, a heating element, and a first power supply. The radio frequency devices are selectively activated by the control device, and each of the plurality of radio frequency devices is operatively coupled to of the plurality of transformers. At least one of the plurality of radio frequency devices are selectively activated by the control device based on a power set signal and a feedback signal, the power set signal representing a desired output current associated with the resonant tank circuit, the feedback signal representing an electrical control parameter associated with the resonant tank circuit. A corresponding method is also disclosed.
A radio frequency inductive heating apparatus includes a control device, a plurality of radio frequency devices, a plurality of transformers, a resonant tank circuit, a heating element, a first power supply, and a second power supply. The radio frequency devices are selectively activated by the control device, and each of the plurality of radio frequency devices is coupled to the primary winding of one of the plurality of transformers. The secondary winding of each of the plurality of transformers is coupled to the resonant tank circuit, and the heating element is coupled to the resonant tank circuit. The plurality of radio frequency devices includes a first radio frequency device and a second radio frequency device. The first radio frequency device is coupled to the first power supply, and the second radio frequency device is operatively coupled to the second power supply. A corresponding method is also disclosed.
A radio frequency inductive heating apparatus includes a control device, a plurality of radio frequency devices, a plurality of transformers, a resonant tank circuit, a heating element, a first power supply, and a second power supply. The radio frequency devices are selectively activated by the control device, and each of the plurality of radio frequency devices is coupled to the primary winding of one of the plurality of transformers. The secondary winding of each of the plurality of transformers is coupled to the resonant tank circuit, and the heating element is coupled to the resonant tank circuit. The plurality of radio frequency devices includes a first radio frequency device and a second radio frequency device. The first radio frequency device is coupled to the first power supply, and the second radio frequency device is operatively coupled to the second power supply. A corresponding method is also disclosed.
The present invention is an inductive sealing unit, which includes a conductive coil assembly that has at least two sections. At least one of the sections is adjustable with respect to the other. Each section has a magnetic flux concentrator, such as a ferrite core. A flexible conductive coil, such as litz wire, is disposed with respect to the magnetic flux concentrator to provide an electromagnetic field which induces heat sufficient to seal an object. The assembly can be adjusted to accommodate different size objects to be sealed.
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