General designs
© KEB, 2015-07 COMBIVERT R6-N Page6.1 - 5
6
6.1.3 Dimensioningpowersupplyandregenerativeunitsowchart
Dimensioning of the power supply and
regenerative unit
Only
regeneration ?
Decouple R6
Acquire:
PM, PMmax,t1,T,ηM, ηG, ηFU
Calculate:
ILG, ILGmax
IDCmax > ILGmax
select higher unit or parallel
connection of R6
(n • IDC, n • IDCmax)
t1 > 60 s
Regenerative unit capable
T < 300 s
IDC > ILG
yes
yes
no
yes
no
yes
no
yes
no
Acquire:
CZK_all
CZK_all > CZK_max
Acquire:
PM, PMmax,t1,T,ηM, ηG, ηFU
Calculate:ILM, ILMmax
IDCmax > ILMmax
select higher unit or parallel connection of R6
(n • IDC, n • IDCmax)
t1 > 60 s
T < 300 s
IDC > ILM
yes
no
yes
no
yes
no
yes
no
Calculate:ILG, ILGmax
IDCmax > ILGmax
IDC > ILG
yes
no
yes
no
select higher unit or parallel connection of R6
(n • IDC, n • IDCmax)
Power supply / regenerative unit capable
PM Mechanical power
ηM
Motorefciency IDC DC current R6
PMmax Max. mechanical power ηG Gearboxefciency IDCmax max. DC output current R6
t1 Overload time ηFU Inverterefciency ILG DC load regenerative current
T Last cycle ILM DC load motoric current ILGmax Max. DC load regenerative current
n Number of R6 ILMmax max. DC load motoric current CZK_all DC link capacity of all frequency
inverters
CZK_max max. connecting capacity R6
Bridge ext. load-shunt
with contactor (special
unit)
no yes
no