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Old 12th Sep 2019, 9:31 pm   #5
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,482
Default Re: Model Railway Controller HM 4000

Feedback control: Measures the back-emf being generated by the locomotive motor so that it can tell how hard the motor is working, the aim being to keep the motor running at a constant speed even if the loco is going up and down gradients, otherwise it would slow down going up a hill and gallop unrealistically down the other side.

DCC is something completely different, here an constant-amplitude alternating serial digital signal is fed to the track all the time whether the trains are moving or not. In DCC all locomotives receive a common feed from the controller but there is a digital decoder in each locomotive, controlling a local PWM speed controller regulating the speed of the individual locomotive. Confusingly, the loco's internal digital decoder / speed controller may also employ feedback measurement for the same purpose as described earlier.

While more complex, DCC means that you can drive any locomotive anywhere on any track, even where there are several other locomotives resting on the same rails.

I don't expect this to be a DCC controller but it may be a traditional pure analogue controller or it might be a PWM based speed controller.
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