That is, the motor drives the blade to produce air flow.
The working principle of the motor is the principle of electromagnetic induction.
Ac motors do not use permanent magnets, using the principle of electromagnetic induction. It is the use of alternating current changes with time to generate a rotating magnetic field, and then make the rotor made of silicon steel sheet rotation, thereby driving the blade rotation. Or an electrified coil is rotated by force in a magnetic field. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and because the coil has resistance, it is inevitable that part of the electric energy will be converted into internal energy.
This is similar to the principle of a fan. Because the blades tilt, air is squeezed as they rotate, causing air to flow. The direction of flow is related to the rotation direction of the fan and the tilt direction of the blade. For example, if the fan rotates clockwise, the left side of the blade moves forward and the right side moves backward, then the wind wants to blow forward. Change one of these factors and the wind will change, change both of them and the wind will remain the same.
At present, the ordinary electric fans, that is, those in your home, put on the bed or ground fans, the speed regulation principle is to change the winding turns to achieve
The winding has a plurality of taps, and a end, the end is connected to the power side, and each tap is a gear
As for the diagram, the circuit diagram of the electric fan is that it has three wires connected to the switch and one power access switch,
Another wire from the power supply to the motor, a wire from the capacitor (auxiliary winding),
That's about it.
As for ceiling fans, most of them now use electronic speed regulation, through the combination of pwm and mos tube, to achieve speed regulation, the former governor also used a similar transformer, change the voltage to achieve speed regulation, but it will lose some energy, for shaking head fan, also useful capacitor speed regulation
In short, tap mode, if the line can be pulled to (relatively short, long word will waste the line) its efficiency is the highest, should be the most possible application, but mainly in this way, the cost of winding, motor cost will be increased, and the power will not be very large.
As for the electronic speed is estimated to be the most ideal at present, can be unlimited any speed, size like how fast, what fan can also.
One more point, please note that the fan will not and cannot use the series of resistance speed regulation, do not be fooled, even if the use of series resistance, it is definitely not produced within the past 20 years, it is probably an antique.
