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Appendix 2 : Inverter capacity calculation formula
Inverter capacity requirment for multidriving
D
e
s
i r c
S
a t
t r
n i
g
e r
q
i u
e r
i w
h t
n i
h t
e
n i
e v
t r
C
r u
e r
t n
i w
h t
n i
h t
a r
e t
d
c
r u
e r
t n
Inverter capacity requirment for continuous performance
D
e
s
i r c
R
e
q
i u
e r
o
u
p t
t u
i w
h t
n i
h t
e
a
o l l
w
M
t o
r o
c
a
p
a
c
y t i
i
v n
r e
e t
r r
t a
n i
g
s
C
r u
e r
t n
i w
h t
n i
n i
c
a
p
a
c
y t i
Inverter capacity requirement for starting
D
e
s
i r c
o T
a t
s l
a t
t r
n i
g
c
a
h t
e
n i
e v
t r
r e
a r
e t
t p
o i
n
m
e
n
s t
a
e r
r e
c
a
p
a
c
y t i
e
n i
e v
t r
r e
t p
o i
n
o l
a
d
n i
g
K Pm /
a
b
e l
a r
n
g
e
i w
h t
n i
h t
e
√
e v
t r
r e
a r
e t
d
t p
o i
n
p
a
c
y t i
i w
h t
n i
d
c
a
p
a
c
y t i
973 COS
C
a
c l
u
a l
e t
M
t o
r o
a
c c
l e
r e
t a
o i
K Pm
[
nT + nS ( kS - 1 )
η
ψ
COS
[
= Pc1
1 + ( nS / nT )( ks - 1 )
≦
1.5 Inverter capacity [KVA]
[
nT lm 1 + ( nS / nT )( kS - 1)
≦
1.5 Inverter capacity [A]
C
a
c l
u
t a l
η
ψ
COS
≦
-3
≦
3K Vm lm
10
≦
K lm
Inverter capacity [A]
C
a
c l
u
t a l
o i
n
f
K N
+
tL
η
ψ
87
d
i w
h t
o
v
r e
o l
a
d
n
f o
1
m
n i
u
e t
r o
]
o i
n
m
e
h t
o
d
Inverter capacity [KVA]
Inverter capacity [KVA]
r o
m
u
a l
(
A t
<
6
0
GD N
2
×
≦
1.5
capacity
375 tA
e l
s s
]
]
) s
Inverter
(KVA)
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