[vamfun]

In response to Eric:

Nice App! I'll take you to Strange Brew - much better beer than Milly's.

Thanks... I've done a little rewrite to add the motor voltage so we can see what a scope on the motors might look like(see attached vi). You can see Vemf in the Victor motor voltage but it is absent from the JAG motor voltage as expected since during the JAG "pwm off" phase the diode is always conducting and so the diode voltage is all that you see.

Strange Brew is ok by me.... I'll fit right in.

You can clearly see ramp up, ramp down, and dwell. As you dither around that frequency, the ratio between those three sections does not remain constant. This means that the effective duty cycle is chop-frequency dependent.

I think you got it... however, I would rather just say that the average of these three sections is frequency dependent . Duty cycle implies to me a constant amplitude signal so you would have to map the input duty cycle to the new effective duty cycle as a function of frequency but then apply it to a system that was not frequency dependent such as a low pass filter without the diode. This would be another way of looking at it.

I still think it would be a great topic for a white paper.

When is your first draft coming out...