Ceiling fan, method for controlling ceiling fan motor and control device for ceiling fan motor

A control device for a ceiling fan motor, comprising:

• a power supplying circuit configured to acquire an external power so as to output a working voltage;
• a processor electrically connected to the power supplying circuit, with the processor operating based on the working voltage, the processor configured to obtain a target value of rotational speed and a limited value of rotational torque related to the ceiling fan motor and generate a control command;
• a motor driving circuit electrically connected to the power supplying circuit and the processor, with the motor driving circuit operating based on the working voltage, and the motor driving circuit configured to drive the ceiling fan motor according to the control command;
• and
• a motor-current sampling circuit electrically connected to the processor and operating based on the working voltage, with the motor-current sampling circuit configured to obtain operation information related to the ceiling fan motor, the operation information adapted for the processor to obtain a current rotational speed and a current rotational torque, the processor determining whether to perform a constant rotational torque operation according to the current rotational torque and the limited value of rotational torque, and the processor selectively determining whether to increase torque current of the ceiling fan motor according to the current rotational speed and the target value of rotational speed.