Abstract: In a DC brushless ceiling fan speed control device and method, the control device includes a switch module having a switch body, a power supply connected to a side of the switch body, and first, second, and third wire connecting members connected to the other side of the switch body. The second and third wire connecting members have a forward diode and a reverse diode respectively, and the switch body is provided for controlling the input of a power supply to directly and electrically supply power to the first wire connecting member, or supply power to the second and third wire connecting members through the forward and reverse diodes. When current is inputted, the waveform signal will be different, and this phenomenon is used for controlling the rotating speed of a ceiling fan to achieve the effects of good safety and convenience.

Abstract: An electric protection mechanism for a light controller includes an overload protection device. The overload protection device includes a lamplight controller, a power controller, and a load detector. A current sensor is provided between the power controller and a light. An overload detector is provided to detect the state of the electric current anytime. Once abnormal current is outputted to the light, the power controller immediately shuts its output and informs the lamplight controller of the abnormal current. The lamplight controller will reset its process, such as to shut down the power source or to press the button so as to return to normal. Thus, the lamplight controller, a light adjuster or a remote controller can be protected. The present invention provides an overload protection function, and it is safe to use the present invention.

Abstract: An electric protection mechanism for a light controller includes an overload protection device. The overload protection device includes a lamplight controller, a power controller, and a load detector. A current sensor is provided between the power controller and a light. An overload detector is provided to detect the state of the electric current anytime. Once abnormal current is outputted to the light, the power controller immediately shuts its output and informs the lamplight controller of the abnormal current. The lamplight controller will reset its process, such as to shut down the power source or to press the button so as to return to normal. Thus, the lamplight controller, a light adjuster or a remote controller can be protected. The present invention provides an overload protection function, and it is safe to use the present invention.

Abstract: A signal transmission apparatus of a DC brushless motor for a ceiling fan is provided. The signal transmission apparatus comprises a transmitting line. The transmitting line is configured to transmit processed output signals of a plurality of electromagnetic sensors, in which usage of transmission lines is reduced. The output signals of the electromagnetic sensors represent the operation of the magnetic poles of the DC brushless motor.

Abstract: A driving apparatus for a DC brushless motor of a ceiling fan is provided. By setting at least one coder and one sensor outside the DC brushless motor, the driving apparatus can sense the position of magnetic poles of the motor for driving the motor. Meanwhile, a controller set with the motor stores the rotation speed of the motor before being turned off by detecting the turn-off time of a turn-on/off signal.

Abstract: A driving apparatus for a DC brushless motor of a ceiling fan is provided. By setting at least one coder and one sensor outside the DC brushless motor, the driving apparatus can sense the position of magnetic poles of the motor for driving the motor. Meanwhile, a controller set with the motor stores the rotation speed of the motor before being turned off by detecting the turn-off time of a turn-on/off signal.

Abstract: A signal transmission apparatus of a DC brushless motor for a ceiling fan is provided. The signal transmission apparatus comprises a transmitting line. The transmitting line is configured to transmit processed output signals of a plurality of electromagnetic sensors, in which usage of transmission lines is reduced. The output signals of the electromagnetic sensors represent the operation of the magnetic poles of the DC brushless motor.

Abstract: A direction control device for a ceiling fan has a direction control circuit arranged in a switch box of the ceiling fan and a remote receiver placed in a place exterior of the ceiling fan. Conducting wires are electrically connected between the direction control circuit and a set of connectors retained inside the switch box. With the aforementioned arrangement, control signals received by the remote control are sent to the direction control circuit through said wires and connectors to determine the rotation direction of the ceiling fan. Further, since the direction control circuit is placed inside the switch box of the ceiling fan, the installing process of the direction control device is simple.

Abstract: A direction control device for a ceiling fan is disclosed, which has a remote receiver arranged inside a canopy of the ceiling fan and a direction control circuit unit arranged in a switch box of the ceiling fan. The conducting wires of the remote receiver and the connection lines of the fan motor are both electrically connected to the direction control circuit unit via a hanger rod of the ceiling fan without being redirected and the rotation direction of the ceiling fan can be remotely controlled.

Abstract: The present invention provides a speed control device for a ceiling fan which comprises a MOSFET, a signal generator and an overload protector. The MOSFET is connected to the ceiling fan and power source via a bridge rectifier for controlling power supplied to said ceiling fan. The signal generator provides a control signal to the MOSFET, wherein the control signal is a cyclic signal whose voltage level is progressively increased and then decreased when it reaches a predetermined level whereby the MOSFET is cyclically and progressively turned on and turned off. The overload protector is connected between the drain and gate of said MOSFET for detecting an abnormally large current flow through said MOSFET to cut off said MOSFET thereby preventing the ceiling fan from possible damage.