Working principle of electric fans
Electric fans are commonly used in our daily lives nowadays. The use of electric fans allows us to spend the scorching summer and cool off during the summer. So, what is the working principle of the electric fan schematic? Follow the editor to learn more.
The main component of an electric fan is an AC motor. Its working principle is that the energized coil rotates under force in a magnetic field. Electrical energy is converted into mechanical energy, and due to coil resistance, it is inevitable that a portion of electrical energy needs to be converted into thermal energy. In addition, the application of small power motors such as DC motors and brushless DC motors in small electric fans is becoming increasingly widespread.
When the electric fan is working (assuming there is no heat transfer between the room and the outside), the indoor temperature not only does not decrease, but also increases. Let's analyze the reason for the temperature increase: When the electric fan is working, due to the current passing through the coil of the fan and the resistance of the wires, it is inevitable to generate heat and release it, resulting in a natural increase in temperature. But why do people feel cool? Because there is a large amount of sweat on the surface of the human body, when the electric fan is working, the indoor air will flow, which can promote the rapid evaporation of sweat. Combined with the "evaporation needs to absorb a large amount of heat", people will feel cool.