tams elektronik
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LD-G-32.2 and LD-W-32.2
4.2. Driving of the motor
Pulse width modulation
The different decoder types are designed to optimally control their
particular fitting motor types.
Decoder
type
PWM
Suitable for coreless
(Faulhaber) motors
LD-G-32.2
32 kHz (fixed)
yes
LD-W-32.2
480 or 60 Hz (to be set)
no
Load control
The LD-
G
-32.2 for DC motors has a load control, the LD-
W
-32.2 for AC
motors do not have this function.
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.
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