Loco-1 / Loco-2
V1.1 - English
page 11 of 36
Motor control
The detection of the connected motor type is automatic. The auto-
matic detection can be switched off and the motor type can be set
manually.
Note: If the loco does not run in analogue mode or only approach at
high driving voltages, switch off the automatic motor recognition and
set the appropriate motor type correctly.
The decoder controls a DC motor with a PWM frequency of 32 kHz or
16 kHz (adjustable). The decoder is thus also suitable for coreless
(Faulhaber) motors.
A universal (Märklin®) motor is controlled with a PWM frequency of
120 Hz (not adjustable).
Load regulation
When controlling a DC motor load control is possible. The load regu-
lation affects the motor voltage so that the speed of the locomotive
operating at a given speed level remains constant, regardless of
additional loads (e.g. running a gradient, coupled wagons).
The load control can be turned on or off, and can be set so that it is
effective only up to a certain speed level. The load control parame-
ters can also be adjusted via CV variables or registers to adjust the
decoder to individual characteristics of the motor.
For load control, a PID controller is implemented. Not only the P-, I-
and D-values can be set, but also the length of the off time for the
back electromotive force measurement (EMF) and the length of the
PWM pulse width, so that an optimum adaptation to the various types
of motor is possible.
Note: Please make sure that when operating with load control the
drive mechanism, gears and the motor of the locomotive are cleaned
well and are perfectly functional.
Remove any attached capacitors
leading from the motor terminals to the loco chassis or ground.
