From: pallison49@gmail.com   
      
    Phil Allison wrote:   
   ================   
   > Bob Engelhardt wrote:   
   >   
   > ** DC motor speed *approximately* follows the average value of the input   
   voltage, not the RMS.   
   >   
   > For 20VAC, this is 0.637 times the peak or 18.0V minus diode losses, so   
   about 16.5V   
   >   
   > I suspect your test is flawed.   
   >   
   ** Update:   
      
   I did a test with a 12V, 5 pole motor with regulated DC and raw rectified AC.   
      
   For the same average DC value, there was no change in motor speed.   
      
   As Jason posted, the motor acts much like a filter electro  -   boosting the   
   *average* DC value to near the AC peak value.   
      
      
   .....   Phil   
      
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