Temperature limited heaters with high power factors
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United States of America Patent
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Jan 15, 2013
Grant Date -
Dec 8, 2005
app pub date -
Apr 22, 2005
filing date -
Apr 23, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
Certain embodiments provide a heater. The heater includes a ferromagnetic member. The heater also includes an electrical conductor electrically coupled to the ferromagnetic member. The electrical conductor is configured to conduct a majority of time-varying electrical current passing through the heater at about 25° C. The heater is configured to provide a first heat output below the Curie temperature of the ferromagnetic member. The heater is configured to automatically provide a second heat output approximately at and above the Curie temperature of the ferromagnetic member. The second heat output is reduced compared to the first heat output.
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