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BrianG · 04.08.2007, 11:36 PM

The whole switching thing is a double edged sword. Too low and the motor speed suffers (not to mention erratic behavior). Too high and you have more losses due to having more switching pulses. By the sounds of it, they are actually decreasing the slew rate, which should cause things to heat up more. I'd be very interested to see how they do that! The only way I can see it working is if they use a tracking power supply, which I don't think is feasible/practical at anything close to the frequencies they are talking about.

I have no idea what kind of motor they have in mind. Personally, I think the motors we have now are pretty darn good since they approach 90% efficiency.

Just to clear things up; I'm not an electrical engineer, just someone with perhaps a less-than-healthy interest in this stuff. :)

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	04.08.2007, 11:36 PM The whole switching thing is a double edged sword. Too low and the motor speed suffers (not to mention erratic behavior). Too high and you have more losses due to having more switching pulses. By the sounds of it, they are actually decreasing the slew rate, which should cause things to heat up more. I'd be very interested to see how they do that! The only way I can see it working is if they use a tracking power supply, which I don't think is feasible/practical at anything close to the frequencies they are talking about. I have no idea what kind of motor they have in mind. Personally, I think the motors we have now are pretty darn good since they approach 90% efficiency. Just to clear things up; I'm not an electrical engineer, just someone with perhaps a less-than-healthy interest in this stuff. :)