Modularized control circuit with signal-capturing function for fan motor and controlling method

摘要

A modularized control circuit with a signal-capturing function for a fan motor is disclosed. The modularized control circuit includes a driven circuit and a microcontroller integrated circuit. The driven circuit is electrically connected to the fan motor to produce at least one analog driven voltage signal, thus driving the fan motor. The microcontroller integrated circuit is electrically connected to the driven circuit and includes a signal-capturing module, a control unit, and a driven signal generator. The signal-capturing module receives an external pulse signal to produce a cycle-capturing signal. The control unit is connected to the signal-capturing module and receives the cycle-capturing signal to produce a control signal. The driven signal generator is connected to the control unit to receive the control signal, thus producing a plurality of switch driven signals for controlling the driven circuit.

主权项

1. A modularized control circuit with a signal-capturing function, the modularized control circuit operating a duty cycle of an external pulse signal for a fan motor and comprising:
a driven circuit electrically connected to the fan motor to produce at least one analog driven voltage signal for driving the fan motor; and a microcontroller integrated circuit electrically connected to the driven circuit, the microcontroller integrated circuit comprising:
a signal-capturing module comprising:
a trigger control circuit configured to receive the external pulse signal;a count unit connected to the trigger control circuit and configured to produce a first count value and a second count value; anda divider unit configured to receive the first count value and the second count value, and provide a division operation on the first count value and the second count value to produce a cycle-capturing signal with the duty cycle of the external pulse signal;a control unit connected to the signal-capturing module and configured for receiving the cycle-capturing signal to produce a control signal; anda driven signal generator connected to the control unit and configured for receiving the control signal to produce a plurality of switch driven signals for controlling the driven circuit.