KEB COMBIVERT R6-S Applications Manual page 155

6.1.2 Dimensioning power supply and regenerative units
Dimensioning of the power supply and
regenerative unit
Only
regeneration ?
yes
Decouple R6-S
Acquire:
P , P , t1, T, η η
M Mmax M,
Calculate:
I , I
LG LGmax
I > I
DCmax LGmax
yes
T < 300 s
no
t1 > 60 s
no
I > I
DC LG
yes
Regenerative unit capable
PM Mechanical power
PMmax Max. mechanical power
t1 Overload time
t Last cycle
n Number of R6-S
© KEB, 2008-02 COMBIVERT R6-S
no
Acquire:
C
ZK_all
η
G, FU
Choose bigger unit or parallel
processing of R6-S
(n • IDC, n • IDCmax)
no
yes
yes
no
η
Motor efficiency
M
ηG Gearbox efficiency
ηFU Inverter efficiency
ILM DC load motoric current
ILMmax Max. DC load motoric current
Project design
C C
ZK_all > ZK_max
no
Acquire:
P , P , t1, T, η η η
M Mmax M, G,
I , I
Calculate: LM LMmax
Choose bigger unit or parallel processing of
I > I
DCmax LMmax
yes
yes
T < 300 s
no
t1 > 60 s
no
I > I
DC LM
yes
I , I
Calculate: LG LGmax
Choose bigger unit or parallel processing of
I > I
DCmax LGmax
yes
I > I
DC LG
yes
Power supply / regenerative unit
capable
IDC
IDCmax
ILG
ILGmax
CZK_all
CZK_max Max. connecting capacity R6-S
yes
Bridgeover ext. load-
shunt with contactor
(special unit)
FU
R6-S
(n • IDC, n • IDCmax)
no
yes
no
R6-S
(n • IDC, n • IDCmax)
no
no
DC output current R6-S
Max. DC output current R6-S
DC load regenerative current
Max. DC load regenerative current
DC link capacity of all frequency
inverters
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