We have a very strong demand from schools worldwide for an educational set,so we have developed this very easy to use kit.

We encourage you to forward this page link to any school that you know so that our children can at an early age get renewable energy understanding
Motorwind educational kit 4.



Composed of 4 plastic turbines connected to a 20 watts generator and installed on a stainless steel frame.

this set can be use in classrooms as well as outdoor to demonstrate the conversion of wind energy into electricity  

to use in classroom the wind power is provided by an electric fan.with very little wind the generator will start generating electricity.


the different teaching aspects

A)by using only one turbine and using a voltmeter a measurement can be made for a measured wind speed

B)by adding a second turbine the measurement will show that the voltage increases

C) with a third turbine the voltage increases again

D)with the fourth turbine the voltage increases again.

by tracing a chart the correlation between the number of turbine and generator output can be established.


By putting the electrical fan closer to the turbines the same experiment can be made demonstrating that with higher wind speedthe output value has increased because the turbines are spinning at higher speed.By making at least 4 to 5 measurement at different wind speed,the relationship between wind energy and generator output can be calculated and the formula regulating wind energy verified

P power in watt = 1/2 x D air density x Area in square meter x V^3 wind speed at power 3 in m/s x E efficiency of the system.


second part : by using a variable resistor (10 to 50 Ohms)as a load a current can be measured for different wind speed and number of turbines.

by using P in watt = R in ohm x I^2 current in ampere at power 2 the output power can be calculated and demonstrate

the first formula and can allow calculation of the system efficiency.

by moving the fan's wind direction ,measurement will allow to verify the changes in efficiency.

The generator is a 3 phase AC using a 6 diodes bridge as rectifier so the demonstration can be made on how the rectifier works

(need to use an oscilloscope).

by using an oscilloscope the frequency of the electric output allow to calculate the turbines RPM because there is a fixed ratio

between the teeth of the turbine and the generator gear (62/16) and the generator being a 4 poles permanent magnet

the ratio is : 7.75 so if there is a 20hz frequency it means that the turbines are spinning at 154 RPM


Battery charging

by connecting the generator to a rechargeable battery: voltage and charging current can be measured allowing

to verify the calculations made earlier.

the charging current/voltage allow to explain what is going on in the battery and explain the chemical transformation.

(use if possible an acid lead battery for security reasons because acid lead battery can take any overcharge and do not blow )



the kit version 1 does not have a generator waterproof casing so turbines can be tested outdoor but not left outdoor

the kit version 2 does have a generator waterproof casing and can be used outdoor .

for class room demonstration it is better without the casing so the generator is fully exposed.

the stainless steel frame comes with two holes that allow an easy attachment to a stand or by using concrete screws can be firmly attached outdoor on a wall or any support.

stainless steel and plastic material allow to clean and disinfect the material from one class to an other.

with very low rotation speed,turbines can be stopped by touch of hand and do not represent any physical danger.

replacement parts are available at low cost so the material can last for many years.

we can provide in the future single turbines so the students can develop their science projects at a low cost.

we will released in the coming months/years some additional accessories such as counter to register the number of rotation

a simple torque meter to measure torque effect on a turbine.

these accessories will be adaptable to existing material.

Reference Description
Item P
4 turbines teaching kit (for schools /college/universities only)



4 micro turbines with generator rated 20W for 10m/s wind. .output 12 to 40 DC volts non regulated

Recommended for very low Wind Speeds - best application between 1ms and 4ms wind speeds.

Frame 1.5 meter long x 0.26 m height x 0.15 m wide .stainless steel main

Volume : 0.03 CBM Measurement : 100 cm x 28 cm x 12 cm .Weight :4 Kgs

(for shipment by container :20'container = approx 900 pcs -----------40' container = approx 1800 pcs)

Prices ---- HK$ --- US$ ---


          version 1 without waterproof casing for the generator
Prices --- HK$ --- US$ --- Euro
          version 2 with waterproof casing for the generator


This special offer is for Schools -College - Universities only and a proof will be required.

(a letter or an email from the principal or the school purchase department).


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