Method for operating a multi-stage electrical heater comprised of several heating elements
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United States of America Patent
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Mar 29, 2005
Grant Date -
Mar 25, 2004
app pub date -
Sep 24, 2002
filing date -
Sep 25, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for operating a multi-stage electrical heater comprised of several heating elements. In conventional multi-stage electrical heaters, the resistance value of the individual heating elements scatters. In order that the individual heating elements emit the same power, specifically the required nominal power, despite the scattered resistance values, the voltage on the individual heating elements is separately regulated down to the required nominal power, proceeding from a maximum electrical resistance of the individual heating elements, at which the entire applied operating voltage yields the nominal power of the individual heating elements required for operation.
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