Operations Manual Thyro Power Manager
Functional Description
Version 2007-12-05
Page 29 of 52
If load elements are deployed, whose resistance increases in the course of time (ageing),
even a converter with enhanced design performance must possibly be implemented (for this,
see chapter 7.2.3 on page 34).
All of these negative effects may be avoided and be reduced to minimum measure by use of
the Thyro Power Manager.
The following figure displays the worst case, in which all power controllers activate and de-
activate at the same time:
Figure 15: Current Distribution in a Worst Case
As one may notice, a 10-fold electrical current flow results simultaneously (in case of 10
power controllers having the same load), whereas no electrical current flows during the other
times.
If the elementary period duration T
0
= 1s or 50 network periods, respectively, the effective
electrical current computes as follows:
I
eff
=
To
Ts
Io
×
×
10
If one assumes the electrical current of an power controller to be I
0
= 1, the start-up time to
be Ts = 3, and the elementary period duration to be T
0
= 50, the following may be computed:
I
eff
=
50
3
10
×
= 2.45
If the Thyro Power Manager is deployed in replacement, each power controller is switched
into series operations. This is displayed in the following figure:
