System Manual V2 – MOVITRAC® B
115
6
Speed-torque characteristic curve
Project Planning
•
S1 (100 % cdf): Select the motor power of the next higher motor type than the
selected inverter power, e.g. for lengthy upwards travel or continuous elevators.
•
S3 (40 % cdf): Select the motor power according to the selected inverter power.
Activate the hoisting function by selecting operating mode P700 = VFC & hoist regard-
less of the above guidelines.
6.4
Speed-torque characteristic curve
The speed-torque characteristic curve looks as follows:
To characteristic curve 1:
Below 20 Hz, the drive cannot be loaded with the rated mtoor torque. The reduced
speed decreases the self-cooling of the motor. As a result, the motor would heat up
excessively.
This limit is not caused by the inverter. Motors with sufficient forced cooling can even be
loaded with a rated torque below 20 Hz.
[1] M in S1 100 % cdf
[2] P in S1 100 % cdf
1
P
P
N
M
M
N
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
100 %
200 %
M
max
2
n
n
N
50 %
150 %
25 %
75 %
125 %
175 %
Содержание MOVITRAC MC07B0037-2A3-4-00
Страница 250: ......