1. Wind turbines
Wind turbines can be divided into DC generators and AC generators.
1. DC generator: A DC generator is mainly composed of a generator shell, a magnetic pole core, a magnetic field coil, an armature and a carbon brush (as shown in Figure 1 ). Working principle of power generation: When the wind rotates the armature of the generator, due to the residual magnetism in the core of the magnetic pole of the generator, the armature coil cuts off the magnetic lines of force in the magnetic field according to the principle. Electromagnetic induction, the current is generated by magnetic induction and the current is output through the carbon brush.
2. Alternator: The alternator is mainly made of magnetic materials with several permanent magnets (called rotors) arranged alternately between the north and south poles and an armature coil made of cast silicon and enroulated with several series games. coils (called stators). Working principle of power generation: The rotor is driven by the wind to axially intersect the magnetic lines of force. The alternating magnetic poles in the stator form an alternating magnetic field in the coil core. When the rotor rotates once, the direction and size are changed. of the magnetic flux changes several times. Due to the transformation of the magnetic field, an induced current varying in magnitude and direction will be generated in the coil and delivered through the stator coil. ?
2. Solar power generation
Solar power generation methods There are two solar power generation methods, one is light-heat-electricity conversion method and the other is light . -Direct electricity conversion method. ?
1. The light-heat-electricity conversion method uses thermal energy generated by solar radiation to produce electricity. Generally, a solar collector converts the absorbed thermal energy into steam as the working fluid and then drives it away. a steam turbine to produce electricity. At present, it can only be used on a small scale on special occasions, and large-scale use is not economically profitable and cannot compete with ordinary thermal or nuclear power plants. ?
2. Direct light-to-electricity conversion method This method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the solar cell. Sunlight shines on the p-n junction of the semiconductor, forming new hole-electron pairs. Under the action of the electric field of the p-n junction, the holes flow from the n region towards the p region and theelectrons flow from region p to region n. region. After the circuit is turned on, a current is formed. This is how photovoltaic solar cells work. Solar cells are a promising new energy source with three major advantages: permanence, cleanliness and flexibility.
I want to make a solar powered fan using a 3V motor ordinary. I wonder if I can. use a battery in the middle to charge it before using it. I can use 2 batteries.
A 150 watt solar panel can produce 1.5 kilowatt hours of electricity per day, and a fan consumes 0.75 kilowatt hours of electricity per day, allowing it to power two fans. A fan is an electrical device that generates air flow and can play a cooling role.
Which is better, solar charged fan cap or fan caprechargeable ator?
The design is quite reasonable. Go to Taobao to buy solar cells that can power your fan motor. per day (the bigger the better.), plug according to your fan voltage, then pass a diode with a fairly large current (not used by some solar panels) and connect it to a use only a battery with the same voltage as your fan (the bigger the better, at least enough to last the night) and connect it to the fan, OK!
The solar charging fan cap is good.
1. The solar charged fan cap is environmentally friendly. The solar charging fan cap uses solar energy to generate electricity, has durable use and is environmentally friendly.
2. Environmental protection of the charging fan cap. The hood ofA rechargeable fan uses lithium batteries to generate electricity, which has a limited use time and is not environmentally friendly.