Wind turbine AC generator's reluctance

[Akmalidin]

Hi,

I am designing small power wind turbine with output power 3kW. I would like to ask about the rotational speed dependence on the load connected. I know when generator is open circuit it rotates freely. But what about when the load is connected? Does it slow down the rotation? Because, when generator is shorted about 1 or less ohm, it shows reluctance in rotation. Therefore, Please let me know your opinion, experience and feedback.

Thank you,
Akmalidin Alimov

 

[Baarken]

Look at this equation, Newton's 2nd law for rotation, and let's forget about friction etc.

$T_{mech}-T_{em}=J\frac{d\omega}{dt}$​

As you increase your load, i.e. increasing $T_{em}$, your generator slows down. To speed up you need to increase the torque input, $T_{mech}$.

 

[Akmalidin]

Hi,
By load I mean electric load ( Resistance, etc.) electric circuit which would be connected to the turbine.

 

[Baarken]

The torque $T_{em}$ depends on the electric load. I.e. if you increase your electric load, $T_{em}$ will also increase.