Induction heating device and process for controlling...

H - Electricity – 05 – B

Patent

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Details

H05B 6/04 (2006.01) H05B 6/06 (2006.01)

Patent

CA 2317649

An induction heating device (10) for controlling the temperature distribution in an electrically conductive material, or susceptor (60), when heated by induced eddy currents in the material. A non-electrically conductive material can be heated in a controlled manner by placing the material near to the susceptor. Variable power is applied to multiple induction coil sections (40) wound around the length of the susceptor from a power source by one or more switching circuits (30). The coil sections can be overlapped (80) or counter-wound (121) between adjacent coil sections, or provided power in a cascaded manner, to achieve desired temperature distributions in the susceptor. A control circuit (50) is used to control the power applied to each coil section and the output of the power source. By placing a non-electrically conduction material near to the susceptor the material can be heated in a controlled manner.

Dispositif (10) de chauffage par induction conçu pour réguler la distribution thermique dans un matériau électroconducteur, ou un suscepteur (60), lorsqu'il est chauffé par des courants de Foucault. Un matériau non électroconducteur peut être chauffé de manière régulée en plaçant le matériau près du suscepteur. Une énergie variable est fournie par ou un plusieurs circuit(s) (30) de commutation à de multiples sections d'une bobine d'induction (40) enroulées sur la longueur du suscepteur, à partir d'une source d'énergie. Les sections de la bobine peuvent être superposées (80), enroulées en sens inverse (121) entre deux sections de la bobine adjacentes ou alimentées en cascade, afin d'obtenir la distribution thermique voulue dans le suscepteur. Un circuit (50) de commande est utilisé pour réguler l'énergie fournie à chaque section de la bobine et la sortie de la source d'énergie. Si un matériau non électroconducteur est placé près du suscepteur, ledit matériau peut être chauffé de manière régulée.

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