Just I was seeking the extra stable collector motor regulator without of optical loop, and in Russian websites found one unique circuit solution. Sad but it not pass to my case, but anyway probably someone may be happy with that.
http://forum.cxem.net/uploads/monthly_2016_11/3747_1.gif.b23fc75dd42405b82aafb092e1fb146a.gif
So, the PWM regulator of prost ATX PS here generates the ordinary output pulse what steers the on/off the main mosfet feeding the motor in pulsed mode. It may be done even in more simple way, as an example on basis of NE555, BUT, here is one very important difference. As soon as the leading pulse had been ended, the motor mecomes a alternator by definition, thus it generates the pulse on it ends what is proportional to the rpm. This `mesure` voltage is cached by lower mosfet and stored at electrolyte, and gives the negative loop for adapting the tau of TL494. So the rpm are very nicely stabilized, except that authors are saying both mosfets must be very identical and mwhat devastates all benefits - the maximum maximorum of 494 is 35-40 Volts while my need is for 65V. And I cannot see the good solution how to save it output from bang-out. The simplest would be by optocouple, but then the demand for supersymmetry is violated... So, I like it, but cannot use it. What ideas?
Oh sorry, I posted a wrong link, here will be correct: www.drive2.ru/c/1717059/
or with better explanations (however russian, but my Google is working well for that)
http://artradiolab.ru/3.6.htm
""Стабилизатор оборотов двигателя для полуавтомата, второй сезон. 12.11.2011""
http://forum.cxem.net/uploads/monthly_2016_11/3747_1.gif.b23fc75dd42405b82aafb092e1fb146a.gif
So, the PWM regulator of prost ATX PS here generates the ordinary output pulse what steers the on/off the main mosfet feeding the motor in pulsed mode. It may be done even in more simple way, as an example on basis of NE555, BUT, here is one very important difference. As soon as the leading pulse had been ended, the motor mecomes a alternator by definition, thus it generates the pulse on it ends what is proportional to the rpm. This `mesure` voltage is cached by lower mosfet and stored at electrolyte, and gives the negative loop for adapting the tau of TL494. So the rpm are very nicely stabilized, except that authors are saying both mosfets must be very identical and mwhat devastates all benefits - the maximum maximorum of 494 is 35-40 Volts while my need is for 65V. And I cannot see the good solution how to save it output from bang-out. The simplest would be by optocouple, but then the demand for supersymmetry is violated... So, I like it, but cannot use it. What ideas?
Oh sorry, I posted a wrong link, here will be correct: www.drive2.ru/c/1717059/
or with better explanations (however russian, but my Google is working well for that)
http://artradiolab.ru/3.6.htm
""Стабилизатор оборотов двигателя для полуавтомата, второй сезон. 12.11.2011""
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