Driving Of The Motor - tams elektronik 30 plus Series Manual

English Locomotive decoders of the series 30 plus

4.2. Driving of the motor

Pulse width modulation
The pulse width modulation (PWM) of the locomotive decoder can be
set to a value between 60 Hz and 30 kHz. This enables you to adjust
the decoder individually to the different motor types, including coreless
motors.
Load control
The decoder has a load control. The load control influences the motor
voltage to keep the locomotive with a set speed level at constant
velocity, independent of additional loads (e.g. running up a gradient,
coupled carriages).
It is possible to switch on and off the load control by varying a CV-
variable of the decoder. The parameters of the load control may be
altered, in order to adapt the decoder to the motor´s individual
characteristics.
Parameters of the load control: The load control is determined by
three parameters which have to be coordinated in order to achieve
optimal driving characteristics. Each of the load control parameters is
assigned to a configuration variable. The parameters are:
KP: The proportional component of the load control ensures the
difference between the set and the present value being as small as
possible. It cannot have the value "0" at any time. This component
affects the basic speed. In case the set value is too small the
locomotive runs too slowly. In case the set value is too high the
locomotive stutters while moving.
KI: The integral component of the load control ensures the remaining
difference between the set and the present value is reduced to 0 and so
for the correction of very small divergences. If the set value is too high
the locomotive stutters massively while moving.
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