From: curiousengineer2000@gmail.com   
      
   I am looking into powering a high voltage, high frequency output (up to 20kV,   
   20kHz) with a sine wave signal from a flywheel that can spin at any speed up   
   to 50,000 RPM.   
      
   The output voltage and frequency is user defined and should remain constant,   
   although the flywheel's speed may change. Power output is in the kW range. Of   
   course, a high efficiency converting mechanical energy to electrical energy is   
   desirable.   
      
   Any suggestions on where/how to start?   
      
   Would it be better to try to design some clever mechanical gearing system to   
   deliver a constant output RPM regardless of input RPM, and then use that to   
   run an alternator?   
      
   Or would it be better to harvest the mechanical energy to electrical energy at   
   any RPM, and re-convert it to the signal I want?   
      
   What kind of signal generator is suitable for powers in the kW range? Somehow   
   I don't think an Arduino would cut it.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)