No the motor does NOT see it as straight DC, the diagram you copied says "average voltage on the motor, what the motor effectively sees". Mark makes this comparison to show what the motor will do and the "equivalent" voltage.But the big point is that the motor heats up and has other characteristics which makes it DIFFERENT from straight DC. Further, the volt meter ABSOLUTELY does not see pwm as straight DC, and non "true rms" voltmeters will have all kinds of different readings depending on how they handle the voltage presented. So while an "equivalent" voltage can be calculated, it is NOT the same to the motor as straight DC. This "averaging" occurs in the motor due to the electrical characteristics of inductors (which are what motor windings are). It's very important to give PWM all the "Respect" it deserves when it is applied to motors, light bulbs, leds, meters. Greg
