Fan motor with digital controller for applying substantially constant driving current
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 28, 2008
Grant Date -
May 18, 2006
app pub date -
Oct 19, 2005
filing date -
Aug 30, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved fan arrangement features a radial or diagonal fan (370) with which a direct current motor (32) is associated as its drive motor, further comprising a digital control element (23, 24) which executes a program, for controlling the current flowing through the direct current motor (32), which program is so configured that it applies a substantially constant current in the motor (32) in the working rotation speed range of the fan.
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