On Tue, 25 Apr 2017 19:16:52 +0100, Chris J Dixon wrote:

Johnny B Good wrote:

Although the article mentions pretty well all aspects of DC motor
control as historically employed for railway locomotion, the use of a
journalistic style over a technical authoring one resulted in a
confusion of descriptive terms (eg currents instead of magnetic fields
and the impression that the [armature] windings on the rotor were wound
*around* the rotor shaft).

Although the author 'loses points' for the use of confusing terms, he
does gain points for his comprehensive coverage of the difficulties,
imposed by the limitations of the technology of the day, facing the
designers in their attempts to recover the braking energy for use by
other trains on the line.

OK, if you want a bit more reading, try these

Principles of Direct Current Electric Traction

https://archive.org/details/in.ernet.dli.2015.288435

Electric Traction

https://archive.org/details/in.ernet.dli.2015.19338


Thank you for those links, Chris.

I had a quick look at the linked pdfs and they look an interesting read
so I've downloaded them for future reference. :-)

--
Johnny B Good