26 Jul
2018
26 Jul
'18
8:26 a.m.
On Thu, Jul 26, 2018 at 4:14 PM, Chuck Guzis via cctalk
<cctalk at classiccmp.org> wrote:
Such MG setups were very common in industry before
modern
semiconductors. When I had a summer job showing movies at a drive-in
theater (a long time ago), the supply for the carbon-arc lamps was a
40hp motor powered by 3-phase 60Hz, driving a DC generator. In WWII
radio equipment, MGs in a unitzed form called "dynamotors" were used to
supply the high-voltage anode voltage for the tubes. Electroplating
shops similarly used large DC generator setups to supply plating current.
I believe if you want to be pedantic that a motor-generator set is a motor
(with an armature/rotor and a field/stator) mechanically coupled to a
generator (with its own armature/rotor and field/stator) whereas a
dynamotor has a common field/stator (and possibly both armature
windings have to be wound on the same core).
-tony