Gradient Induction Heating of a Workpiece
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United States of America Patent
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app pub date -
Aug 30, 2009
filing date -
Jun 1, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus and process are provided for gradient induction heating or melting of a workpiece with a plurality of induction coils, each of the plurality of induction coils is connected to a power supply that may have a tuning capacitor connected across the input of an inverter. The plurality of induction coils are sequentially disposed around the workpiece. The inverter has a pulse width modulated ac power output that may be in synchronous control with the pulse width modulated ac power outputs of the other power supplies via a control line between the controllers of all power supplies.
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