On 15/08/2016 20:17, The Natural Philosopher wrote:
On 15/08/16 19:22, Fredxxx wrote:
On 15/08/2016 17:58, harry wrote:
On Monday, 15 August 2016 14:01:41 UTC+1, Dave Plowman (News) wrote:
In article ,
tony sayer wrote:
The current is reversed as it passes under a brush turning it into
AC.

No Harry .. thats switched reversed polarity DC...

Well, yes. AC is generally a sine wave. Be good to see how you achieve
that with a switch. Many inverters make a pretty poor job of
producing a
sine wave. ;-)

AC can be any wave form.

Ah, so we are now saying DC is a special case of AC.

No. the current and voltage have to reverse to be alternating.

I see your command of English is as poor as your understanding of motor
theory.

My motor theory is fine, thanks for your concern.

Your understanding is more worrying where you claim your DC motors
should not be supplied with DC.

Similarly if you don't know the difference between a unipolar motor and
a ball bearing motor then you really ought to stop here.