Thermal therapy device and method of use
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United States of America Patent
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Nov 16, 2010
Grant Date -
Aug 2, 2007
app pub date -
Apr 22, 2005
filing date -
Apr 23, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The thermal therapy device comprises an inverter circuit connected to the primary side of a transformer, a series resonance circuit connected to the secondary side of the transformer and including a magnetic field generation coil and a resonance controller, and a controller for determining the resonance frequency based on the secondary current. The controller has a measurement mode and an operation mode which are alternately repeated. During the measurement mode the resonance frequency of the series resonance circuit is measured, while during the operation mode a drive signal of said measured resonance frequency is supplied from the controller to the inverter circuit.
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