Fan motor
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United States of America Patent
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Mar 1, 2016
Grant Date -
Mar 6, 2014
app pub date -
Mar 16, 2013
filing date -
Aug 31, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A fan motor, including: a variable speed motor and a motor controller. The motor controller includes: a microprocessor, an inverter unit, a gear detection unit, and a power supply unit. The power supply unit supplies power for each circuit. The gear detection unit is connected to a plurality of power input lines. Each power input line receives AC power from an AC power supply. The gear detection unit includes: a plurality of voltage detection circuits, and a plurality of thermal resistors. Each power input line is connected to a thermal resistor in series and matches up with a voltage detection circuit. Each voltage detection circuit includes a thermo-sensitive resistor that is bound to the corresponding thermal resistor via a thermal conductive element. The thermo-sensitive resistor detects a temperature signal of the thermal resistor and adjusts the voltage of the output end of the voltage detection circuit.
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