Lust CDA3000 - Page 24

1-14
Engineering Guide CDA3000
1 Analysis of task
Speed manipulating range
The speed manipulating range is the range in which the motor can always
deliver nominal torque.
Manipulating range =
f
N
Rated frequency in Hz
f
min
Minimum frequency in Hz
n
N
Nominal speed in rpm
n
min
Minimum speed in rpm
Figure 1.12 Speed manipulating range
f (n)
M
M
N
f
min
n
min
f
N
n
N
f
N
f
min
--------
n
N
n
min
----------=