Baumuller b maXX BM1000 - Capacity Formulas

Capacity formulas
Manual b maXX
®
BM1000
Document No. 5.07003.04 Baumüller Nürnberg GmbH
162
of 174
F.1
m When it is running continuously
n The requirement of load capacity should be less than the capacity of b maXX
®
drive
(kVA)
The requirement of load capacity =
n The motor capacity should be less than the capacity of b maXX
®
drive (kVA)
n The current should be less than the rated current of b maXX
®
drive (A)
Symbol explanation
P
M
Motor shaft output for load (kW)
η Motor efficiency (normally, approx. 0.85)
cosϕ Motor power factor (normally, approx. 0.75)
V
M
Motor rated voltage (V)
I
M
Motor rated current (A), for commercial power
k Correction factor calculated from current distortion factor (1.05-1.1, depending
on PWM method)
P
C1
Continuous motor capacity (kVA)
ks Starting current/rated current of motor
n
r
Number of motors in parallel
n
s
Number of simultaneously started motors
GD² Total inertia (GD2) calculated back to motor shaft (kg m2)
T
L
Load torque
t
A
Motor acceleration time
N Motor speed
kP
M
⋅
ηϕcos⋅
----------------------
capacity of the b maXX® drive [kVA]≤
k3V
M
I
M
10
3–
⋅⋅⋅⋅ capacity of the b maXX® drive [kVA]≤
kI
M
⋅ the rated current of the b maXX® drive [A]≤