Electronically programmable universal brushless DC fan with integral tracking and locked rotor protection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 7, 1987
Grant Date -
N/A
app pub date -
Jan 21, 1986
filing date -
Jan 21, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brushless DC fan with a winding supply circuit having an internal voltage regulator can afford current limiting and thermal protection and provide various desired fan speeds without alteration of the basic fan circuit, the windings, or other manufacturing items. A voltage setting circuit element can set fan speed externally and can be used to establish various fan speeds. An internal voltage establishing circuit element sets the maximum speed. The regulator replaces the fan's protective thermistor to shut down the voltage to the windings when locked rotor occurs. Bringing out a lead for the purpose of connecting a speed controlling resistor, thermistor, or active programming means to the internal circuitry enables the fan's end user to alter operation as needed.
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Family
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Cited Art Landscape
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