The fan (electric fan to be precise) relies on converting electrical energy into kinetic energy to obtain power for rotation. At this time, part of the electrical energy will be converted into thermal energy and dissipated as heat. heat generated by the motor (assuming 20% loss of energy). This is the first loss of energy (or 80% of the remaining energy if using fan rotation to generate electricity for the fan), and at this point only 80% of the energy is lost. The energy remains in the entire system, the kinetic energy is converted again via the motor. If the fan is converted to electrical energy to power the electric fan, some of the energy will be lost in the form of. thermal energy (assuming it represents 20% of the remaining energy, or 16% of the total energy). After two energy losses, the total energy is only 1 to20% to 16% = 64%. That is, before the start of the second rotation cycle of the electric fan, the total energy has disappeared since the first start. previous 64%, that is, the total energy is constantly decreasing.
In addition, the above only deals with the loss of thermal energy, as well as the friction between the fan blades and the air, and other factors, resulting in a continuous decrease of total energy. There are also differences in the operation of electric motors, different power levels, technical problems, etc.
In addition, this also involves the problem of perpetual motion machines. Historically, the first and second generations of perpetual motion machines were unsuccessful. From the point of view of the law of conservation of energy, "perpetual motion machines" will be. does not exist.
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I have a household electric fan motor. It is new. I want to turn it into a generator.
The answer is theoretically possible When it turns. , By cutting off the magnetic field, the kinetic energy is converted into electrical energy.
Actually, we won't do that. We just need to use a special generator to produce electricity.
Cooling fans, English name: Cooling fans. The technology and performance of cooling fans have reached a complete maturity stage, and new technologies are constantly emerging. Fan specifications range from 8mm to 280mm, voltages include 5V, 12V, 24V, 48V, 110V, 220V, 380V and shapes include square, round, olive, etc.
How to turn a household electric fan into a generator. Description of the process Happy progress in physics! THANKS!
1. The transformation of a wind engineHome electric ilator into generator requires no modification (the running capacitor cannot be removed as long as the driving force is used to turn the rotor). 1500 rpm, the output will be delivered to both ends of the 220 V main winding.
2. The rotor has been replaced with a permanent magnet, so there is no need to use a running capacitor. The original stator winding does not need to be modified. The two terminals of the main winding are used as. exits ; If the rotor is replaced with a 2-pole permanent magnet, magnetic, the driving force must be used to rotate the rotor at 3000 rpm.
Extended information
Notes:
1. View random file
The motor fan is installed. random Instructions for use, product certificates, electrical circuit diagrams and packing lists must bet be checked and verified.the parts.
2. Look at the appearance of the motor fan
Check carefully to see if the motor fan grille and fan blades are visibly deformed. Fan blades should rotate quickly and smoothly and should not always stop in the same position.
3. Look at the starting performance
Starting performance is an important quality indicator of the motor fan. Upon inspection, at slow speed and 85% of the rated voltage of the power supply, the motor fan should be able to start from stop and operate normally. The shorter the time it takes for the motor fan to return to normal operation. improve engine fan starting performance.
4. Check the speed regulation performance
After power on, there should be no abnormal noise inthe mechanical transmission part of the fan. When the electric fan operates at high, medium or low speed, the motor and fan blades should be stable, with low vibration and low noise. The motor fan should shudder and stop quickly without interruption, stagnation or instability.
5. Check for electrical leakage
After the motor fan is turned on, if you feel numbness and electricity when you touch it with your hand, use a test pen to test. The test pen also has a light display, which can determine whether the case is leaking or not.
Reference materials:
The electric fan rotor coil is modified and connected end to end with two slip rings. Batteries are used to replace the power supplyCC. Then the positive and negative ends of the DC power are sent to both. slip rings respectively through carbon brushes. Regardless of the method you use to turn the rotor (hydraulic power, wind power, or manpower can be used), an alternating electrical potential is generated at both ends of the stator coil of the rotor. fan.