gefran TPD32-EV-500 series - Mains Harmonic Currents Generated by Converters; Engineering Notes; Potentials of the Regulator Section

—————— TPD32-EV ——————
104
4.10.3 Mains harmonic currents generated by converters
Information about mains harmonic currents generated by fully-controlled (six-pulse) three-phase SCR
bridge AC/DC converters.
Giventheirnon-linearload,SCAC/DCconvertersdrawnon-sinusoidalcurrentfromthemainsandthuscreate
harmoniccurrent.
Theexactcalculationoftheharmoniccurrentinasystemdependsonanumberoffactorsthatarelinkedtothe
actualsystemandthepointatwhichtheconverterisinstalled.FormoredetailsreferenceshouldbemadetoEN
61800-3,IEC146-1-2orEN61800-1(annexB).
Purelybywayofexample,some“typical”harmoniccurrentvaluesmeasuredinpracticeandreferringtothe
fundamentalvalue(I
1
)areprovidedbelow..
Harmonic order
h
Ih / I1
[%]
5 24 ... 28
7 5 ... 10
11 8 ... 9
13 4 ... 6
17 4.5 ... 5
19 3 ... 3.5
4.11 ENGINEERING NOTES
TBO
Analog outputs
12
1 234
Digital outputs
1234
5 6789 10
Supply
Digital inputs
15 11 12 13 14
1234
12 34 56
Analog inputs
12
13
14
15
16
Enables
11
XE 2
7
2
19
18
+ 24 V
0 V 24
9
0 V 10
+ 10 V
- 10 V
7
8
Reference Supply dig. I/O
R-TPD3
XE 1
7
9
+15V
+5V
±15V
Sinusencoder
Digitale encoder
0 V
0V
Figure 4.11.1: Potentials of the regulator section
Potentials of the regulator section
Thepotentialsoftheregulatorsectionaregalvanicdividedfromthepowersection.Figure4.11.1showstheir
connection.
- Theanaloginputsaredesignedasdifferential.
- Theenablesareisolatedfromtheregulationviaoptoisolators.Theterminals12to15haveterminal16asa
commonreferencepotential.