Good idea, but knowing the Chinese, they could not afford the electricity.SirenMadness wrote:So the motor must be always on, at one polarization, right?
They only test once a year.
We went into a little ma/pop store. Depressing and lit only by outside light.
Seeing that I was a rich American (gothat WAY wrong!), they expectantly turned on their single compact fluorescent light for the occasion.
(I felt bad that we did not buy something.)
In a small town at dusk, it got quite dark before they turned on their street lights. At leasthey HAD street lights!
There must be a permanent magnet, I presume in the outside circumference in the stator housing so it need not be as powerful, which pulls on any rotor blade.
In my hurry to get out of there, I could not find the magnet nor did I count the number of ports.
(But, could their rotor and stator be made of aluminum?)
I bet a screen does make some very slight difference.
Add up the area of all the screen material and subtract it from the port opening.