Fan system and motor control circuit
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United States of America Patent
Stats
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Apr 23, 2013
Grant Date -
Nov 20, 2008
app pub date -
Apr 25, 2008
filing date -
May 18, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control circuit is electrically connected to at least one fan device. The fan device has a motor and generates a sensing signal. The control circuit receives a power-source signal and the sensing signal and includes a power converting unit, a control unit and a switch unit. The power converting unit receives the power-source signal and thus respectively outputs a first power-source signal and a second power-source signal according to the power-source signal. The control unit receives the first power-source signal and the sensing signal and thus generates a control signal according to the sensing signal. The switch unit receives the control signal and generates at least one switch signal according to the control signal. The fan device receives the second power-source signal and the switch signal and drives the motor according to the switch signal.
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