B
DTRen-2008/SPA-5/LVA
Rev.:
a
Page 28
Bombardier Transportation (ZWUS) Polska Sp. z o.o.
4.4.2 EMF-6 stabilized DC/DC power converter module
EMF-6 stabilised power DC/DC voltage converter lowers non-stabilised input
voltage to the stabilised and adjustable in a certain range output voltage.
In SPA-5/LVA EMF-65 module is used to charge batteries
- Uout=25÷29V
- Maximal output current Iout max=10A.
EMF-65 - block diagram.
Figure 15
There are two separated control circuits of the output current of the EMF-6
module. They are galvanically separated from the EMF-6 output current. Each of
the control circuits is supplied from the independent DC voltage and generates two
logic output signals Ip1_A(B) and Ip2_A(B) which are interpreted by the PLC
program. Logical value of Ip1_A(B) and Ip2_A(B) depends on the value of the
output current of EMF-6 in comparison to two threshold values (Ip1 and Ip2; Ip2 >
Ip1). Ip1_A(B) and Ip2_A(B) are in low state (L) if EMF-6 output current does not
exceed Ip1 threshold value. Ip1_A(B) is in high state (H) and Ip2_A(B) is in low
state if EMF-6 output current value (I) is in the range Ip1 < I < Ip2. Ip1_A(B) and
Ip2_A(B) are in high state when I > Ip2.
This
training
material
has
been
prepared
only
for
educational
purposes
and
it
isn't
technical
documentation.
