| According to DB AG research efficiency of transversal flux machine
couplings is 97 %, compared to 90 % of asynchronous motor gears couplings.
That is a relative improvement of ~ 8 %. According to the following elasticity
table, this yields traction energy savings of 8 – 12 %.
|
|
Traction |
Brake energy
recovery |
Effect on
efficiency of power train |
Elasticity
with regard to efficiency of power train |
Effect on
total energy consumption for traction |
|
High speed
train |
electric |
no |
8
% |
-1,00 |
-
8 % |
|
|
|
yes |
-1,11 |
-
9 % |
|
Intercity
train |
electric |
no |
-1,00 |
-
8 % |
|
|
|
yes |
-1,12 |
-
9 % |
|
Regional
train |
electric |
no |
-1,00 |
-
8 % |
|
|
|
yes |
-1,33 |
-
11 % |
|
Suburban
train |
electric |
no |
-1,00 |
-
8 % |
|
|
|
yes |
-1,42 |
-
11 % |
|
Freight |
electric |
no |
-1,00 |
-
8 % |
There is an
additional effect through mass reduction. The transversal flux machine is
roughly 50% lighter than asynchronous machines. Counting gears as well,
transversal flux direct drives are 2/3 lighter than conventional asynchronous
motor drives, an absolute mass reduction of 1000 kg for a 500 kW motor. The
corresponding energy savings will be small compared to the efficiency gains
described above.
|
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date created: 2002-10-03
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