Bill,
Thanks for posting this. Listening to that 60's documentary voice brought back a lot of memories. I agree that both the DC and AC segments do a great job of explaining motors. Of course, a lot has changed since 1961. The basic concepts are identical, but modern electronics have changed what is practical. Cars used to need DC generators to charge their batteries. Then low cost diodes came along and made AC generators with diodes to convert the output to DC (ie, alternators) the better choice. On the motor side, it took longer for the changes to get here. But, now we can make AC from DC via electronic switching making a number of multiphase AC designs suitable where no AC is readily available. The basic physics still rules, though. All that changes are impractical designs becoming not only practical, but inexpensive. I wonder what the next 50 years will bring?
Pat
--- In electricboats@yahoogroups.com, "Galstaf" <richard@...> wrote:
>
> Hey folks,
>
> I am rusty at best with my high school level physics, so I found these videos really helpful, and will help you talk a little more intelligently with vendors when discussing motor choices for your boat.
>
> There are a few of them from the 50s and 60s that explain a number of electrical concepts very well. They are a bit camp at this point, but at least they don't feel like they have to play rock music or techno and have flashy graphics to keep your attention.
>
> Check them out!
>
> DC Motors
> http://www.youtube.com/watch?v=OpL0joqJmqY&feature=relmfu
>
> AC Motors
> http://www.youtube.com/watch?v=07uXnc1C5CA&feature=relmfu
>
> Starter Motor explains DC motors a little better I feel
> http://www.youtube.com/watch?v=a_nsgzlrZGU&feature=relmfu
>
> Enjoy!
> Bill
>
No comments:
Post a Comment