Rosenberg, Klein & Lee
Universal low-power ceiling fan controller
A universal low-power ceiling fan controller includes a brushless DC motor in a ceiling fan casing, a microprocessor connected to a power supply that operates with a remote-control device and has a transmitter and a receiver for transmitting data signals to the microprocessor by wireless transmissions, a driving device installed between the microcontroller and the motor for turning on or off a fan, and a feedback device having at least three Hall components for continuously sending feeding back a position change to the microcontroller for determining the motor speed, such that the microcontroller receives the signals of the remote-control device and the driving device drives the motor to rotate, and sample signals of the feedback device is fed back to the microcontroller to determine and conduct an automatic compensation, so as to maintain a constant speed of the vanes of the ceiling fan and lower the electric power consumption.
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inventional additional inventional additional
Ching-Tan Chin-Hsiung
Lee Chang