Do commercial motors/generators produce eddies, why do builders build their own?

[Cadman]

But at least tell me this. How do you measure
".. electrical energy going through a DC motor.."?

Thanks,
bi

With a Hewlett-Packard model Five-Seven-One-Oh-A dual-column gas chro-mato-graph with flame analyzing de-tectors, of course.

[bistander]

With a Hewlett-Packard model Five-Seven-One-Oh-A dual-column gas chro-mato-graph with flame analyzing de-tectors, of course.

You won't even give me a serious answer to a simple sincere civil question so I might understand what it is you're talking about. Why is that? Can anyone tell or give me a hint? Maybe refer to an example of electrical energy going through a DC motor?
Regards,
bi

[bistander]

This may be useful.
https://www.nidec.com/en-EU/technology/motor/basic/00001/

POWER FLOW IN MOTOR & IN GENERATOR

[AllanV]

You won't even give me a serious answer to a simple sincere civil question so I might understand what it is you're talking about. Why is that? Can anyone tell or give me a hint? Maybe refer to an example of electrical energy going through a DC motor?
Regards,
bi

When my children were young we had an electric train. There were the usual problems so a variable pulse width power supply was built and it had a frequency of 2.2Khz. A good improvement, but after some thought small capacitors were soldered onto the commutator segments to suppress the contact arcing. It is much like the ignition points on the older cars where a capacitor is absolutely necessary.

The lift in the motor speed with reduced current was apparent and the brush plate was then adjusted slightly as well.

The DC train motor was working in a sweet spot.

[AlienGrey]

It's not a capacitor on a car it's a combination with a resister and a capacitor, do you know why a resister is added as well  ?