Water flow generator ore feeder
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does not move
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according to P = FV, 6KVA generator, the output current is only 24a, a 7.5kW water pump and 5.5kW mining machine, the total power is 13kw, the normal current has 26a, overload. Moreover, the starting current of the motor is larger, that is, the starting current of 7.5kW is about 30A. If the 7.5kW is started first, the working current is already 15a, and then the 5.5kW is started, the starting current is 20a, and the total current is 35A
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it's mainly about the selection of contactors. It's better to use contactors with larger capacity, because the water pump motor starts with load, and the current at the moment of starting is too large, which will cause great damage to the contacts of contactors. If the selection is small, it will affect the service life of contactors
The output voltage of the generator should be increased correspondingly ring the motor starting process to protect the voltage drop ring the motor starting. There should be no problem with 3KW motor with 1.5KW. It is enough to adjust the speed of the generator ring the start-up< br />
This is wrong. There is no small hydro generator because there is no unified definition of small hydro generator. There is no consistent definition and capacity range of small hydropower in the world. Even in the same country and in different periods, the standards are not the same
Generally, according to the installed capacity, small hydropower can be divided into micro, small and small. Some countries have only one grade, while others are divided into two grades, which are quite different. According to China's current regulations, small hydropower stations with installed capacity less than 25000 kW are called small hydropower stations; Medium sized hydropower stations are not less than 25000 kW and less than 250000 kW; More than 250000 kW is a large hydropower station 
extended data
for small hydropower stations, it has its own characteristics, including the following aspects:
(1) the construction scale of the power station is small, the project is simple, and it has local characteristics
(2) small hydropower equipment is relatively simple, and many of them can be ordered nearby(3) in general, small hydropower should not be transmitted from long distance, but from local to local
(4) the capacity of small hydropower grid is small, the generating capacity is small, and the load is small and scattered
(5) small hydropower buildings and equipment are small and simple (6) e to the small scale of small hydropower generation, there are few problems of submergence and submergenceWhen you talk about a small generator, you mean a large power generator. The power range of the generator is relatively large. It depends on your actual power demand< br />
Install 1.5KW hydraulic generator. The nozzle area is 0.004416 m2, the flow rate is assumed to be 3 M / s, the head is 30 / 1.414 = 21.2 m, considering the loss of water authorities, take 20 m, the comprehensive efficiency of small units is 60%, then the output power is 1.56 kW, so install it as 1.5 kW< br />
The principle of hydraulic generator (turbine) is that when the water flows through the turbine, the water energy is converted into mechanical energy, and the rotating shaft of the turbine drives the rotor of the generator to convert the mechanical energy into electrical energy for output
the world's first hydropower station was built in France in 1878. The first hydropower station in America was built in 1882 in Wisconsin, USA. After 1889, three-phase alternator was used. Since then, the single unit capacity has grown rapidly, only 15000 kW in 1890, and 105000 kW generators have been proced by 1955. Before 1949, the unit capacity of self-made Hydrogenerator in China was no more than 200kW. After 1949, the motor instry has developed vigorously. In 1958, it has been able to proce 72500 kW unit, and in 1972, it has proced 300000 kW double water internal cooling wheel generator. The world's leading large capacity hydro generators are 718000 KVA stator water-cooled semi umbrella hydro generator of daguli hydropower station, 737000 KVA stator water-cooled semi umbrella hydro generator of yitaipu hydropower station, 700000 KVA air-cooled umbrella hydro generator of Guli hydropower station and 800000 kW hydro generator of Xiangjiaba Hydropower Station
If the flow velocity is 5 meters per second (equivalent to 1.275 meters of water head), if the cross-sectional area is 1 square meter, then the energy per second is 62475 J, and the primary electricity is 1000 J per second. That's 62.4 kwh per hour. According to 50% of power generation efficiency, 31KW generator is more suitable. But in fact, the power of the generator is designed according to the water head (speed) of 13 meters. If the water head is 10 times lower, the power generation will be 10 times less, so the 31KW generator can only generate 3.1kw of electricity, and you must have 310Kw generator to generate 31KW of electricity. Just like ten thousand revolution motor 1kW only weighs 1kg, thousand revolution motor 1kW weighs 10kg. This is also the reason why the 24000 RPM (400Hz) generator is used in the aircraft. Under the same power, it is 8 times lighter than the 3000 rpm (50Hz) generator