Lenze i550 Series - Page 28

Calculate range of adjustment and determine rated point
Calculaon
Seng range
=
L,max
L,min
n
V
n
Seng range Rated point
Motor with integral fan
≤ 2.50 (20 - 50 Hz)
≤ 4.35 (20 - 87Hz)
≤ 6 (20 - 120Hz)
50 Hz
87 Hz
120 Hz
Motor with blower
≤ 10.0 (5 - 50 Hz)
≤ 17.4 (5 - 87Hz)
≤ 24 (5 - 120Hz)
50 Hz
87 Hz
120 Hz
Motor with integral fan
(reduced torque)
Determine motor based on the rated data
Check
Rated torque
Operang mode S1 M
rated
Nm
³
´
L,max
N
H,Mot U,Mot
M
M
T T
Operang mode S6 M
rated
Nm
³
´ ´
L,max
N
H,Mot U,Mot
M
M
2 T T
Rated speed n
rated
rpm n
rated
≥ n
L,max
£
n
L,min
n
n
V
Note
Rated torque M
rated
Nm
→ Rated motor data
Rated speed n
rated
rpm
Rated point at Hz → seng range
Power factor cos ϕ
→ Rated motor data
Rated current I
N,MOT
A
Rated power P
rated
kW
Correcon factor - site altude T
H,MOT
→ Technical motor data
Correcon factor - ambient temperature T
U,MOT
Select motor
Correcon factors for the inverter
Site altude Amsl H
[m] ≤ 1000 ≤ 2000 ≤ 3000 ≤ 4000
k
H,INV
1.00 0.95 0.90 0.85
Temperature in the control cabinet T
U
[°C] ≤ 40 ≤ 45 ≤ 50 ≤ 55
Switching frequency
2 or 4 kHz
k
TU,INV
1.00 1.00 0.875 0.750
8 or 16 kHz 1.00 0.875 0.750 0.625
Switching frequency with the "Light Duty" load characterisc
2 or 4 kHz k
TU,INV
1.00 0.875 0.750 -
8 or 16 kHz - - - -
Determine inverter based on the rated data
Check
Output current
Connuous operaon I
out
A I
out
≥ I
N,Mot
/ (k
H,INV
x k
TU,INV
)
Overcurrent operaon cycle 15 s I
out
A I
out
≥ I
N,Mot
x 2 / (k
H,INV
x k
TU,INV
)
Overcurrent operaon cycle 180 s I
out
A I
out
≥ I
N,Mot
x 1.5 / (k
H,INV
x k
TU,INV
)
Informaon on project planning
Project planning process
Dimensioning
28