Confirmation of OU devices and claims

[Mannix]

Yes there are many very interesting devices .

Its probably time to examine the fan and it use in evaluating work done .
Most fans especially ducted types and more specifically dc types are of brushless design and are fixed speed devices which, when loaded by a long duct will load up and draw more current .
Using them in free air with an anemometer held by hand is fraught with issues as in an unloaded condition the speed will be the same as will the airflow .
When one captures the excess when unloaded they are effectively reducing the ability of the fan to do work as in a long duct rather than in free air.
It would be different if the fan was a free running dc motor which was supplied say 10v when 20v would have it running much faster in unloaded condition.
It is hard to imasgine a well versed, articulate, educated ,well equiped researcher would not be aware of the nature of brushless dc fans .


The same test with the fan attached to a 20ft duct would be more revealing provided the anenometer was fixed.

[hartiberlin]

HI Stefan. In my quote which you included in your reply, and which you were replying to, I made it clear that I never stated that the voltage across
the coil did not change polarity. Again, I never stated that anywhere. What I stated about inductive switching spikes versus
BEMF/CEMF is correct.

Void,

Have a look again at this circuit:
http://www.learnabout-electronics.org/ac_theory/images/Protection-Diode.gif


For sure the voltage at the coil  did change, otherwise the diode can not conduct and supress the BEMF voltage pulse !
I guess you mixed something up.
The current through the coil does not change direction, it is just flowing into the same direction, but now through the diode, when the transistoris switched off...

Regards, Stefan.

[AlienGrey]

Void,

Have a look again at this circuit:
http://www.learnabout-electronics.org/ac_theory/images/Protection-Diode.gif


For sure the voltage at the coil did change, otherwise, the diode can not conduct and suppress the BEMF voltage pulse!
I guess you mixed something up.
The current through the coil does not change direction, it is just flowing into the same direction, but now through the diode, when the transistoris switched off...

Regards, Stefan.

Stefan please don't be offended here but if that is true why is the flyback diode the other way round? 
t's a nice try but for it to be any use you need  to stop the BEMF going back into the coil winding as it would keep ringing until exhausted and is all you can do with that energy is pump it back into the supply where it came from but because of its polarity it was generated with will always be less than it's supply.
But if you wanted OU BEMF you wouldn't do it like that.

However as with a relay coil or motor usually that doesn't matter.

PS for what the been done to OU you might as well erase my log in as it's utterly useless value now. bye!

Regards AG

[popolibero]

Hi Rick,


is your new website already up?


Mario

[mrzlica]

Hi,


for all the sceptics, here is your chance:


http://www.r-charge.net/Oct-25-26-2019-Elkhart-Indiana-Resonance-Engineering-Convention-Workshop_p_333.html


br