There has never been a 5 kW hydroelectric generator. In the past, there were 10 kW, 20 kW and 50 kW hydroelectric generators. Today, they are all large capacity, and there are very few around 200 kW.
No matter in the past or today, small capacity motors use asynchronous motors to generate electricity, which is simple, convenient and inexpensive.
Structurally speaking, generators and motors are exactly the same, usually consisting of a stator, rotor, end cover, brush, base and of bearings.
The stator consists of a machine base, a stator core, a wire winding and other structural parts that secure these parts.
The rotor consists of the rotor core, rotor magnetic poles (with magnetic yoke and magnetic pole windings), slip rings (also called copper rings and ringscollectors), fans and rotating shafts.
Generators and motors are completely reversible. When the rated voltage is applied to the stator windings of generators and motors, the external force rotates to rotate the rotor of the generator or motor to achieve the rated value; Synchronous speed, the stator will generate voltage and emit electricity.
Simply because the design is focused, the efficiency of using a generator instead of a motor or a motor instead of a generator is less than 70% of the nominal value, so it is generally not replaced, and only those with small capacity will be chosen.
Flow [second]m=12000[kg]/3600=3.333[kg], height [drop]h=35m, g=9.81
Hydraulic energy per second: mgh = 3.333x9.81x35=1144.5 watts=1.14 kilowatts.
The efficiency of small hydroelectric generators is not high. Calculated at 70%, the powerThis generator rating is: 0.801 kilowatts.
Let's take one from 0.9 kilowatt to 1.2 kilowatt.
The larger the size, the less likely it is to overheat. A medium-sized horse-drawn cart is reasonable.