Saturday, February 5, 2011

CrazyEngineers Forum - Electrical & Electronics Engineering

CrazyEngineers Forum - Electrical & Electronics Engineering

hydrogen-cooled generator

Posted: 04 Feb 2011 11:54 AM PST

Hi,
Can someone help me in this matter:

I would like to know if it is possible to use air instead of hydrogen in a hydrogen-cooled generator. If it is possible, what would be the conditions to do it. If not please justify your answer (e.g. safety reasons, efficiency, what can go wrong, etc.)

Thanks

Servo control with Sine cosine potentiometers.

Posted: 04 Feb 2011 10:22 AM PST

I have controller and motorized rotating device. The Controller is a knob the User can rotate. The rotating device is Propulsion Nozzle. Both the Controller and the Nozzle can be rotated over full 360 degrees – no limits. Both Controller and device are equipped with Sine Cosine Potentiometers.

I need the Nozzle to follow the Knob. In order to do that I need to compare output signals from the two sine cosine potentiometers and generate error signal. Error signal activate the motor and make the nozzle turn to follow the controller.

I am looking for simple (and preferably analog) way to compare outputs of the two Sine Cosine Potentiometers and generate error signal.

I expect there should be analog way to do it because the sine cosine pots were around before digital techniques came to being.
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