Other Loads - Siemens Midimaster Eco Reference Manual

SC

OTHER LOADS

Many other loads have non linear or varying
torque relationships. The torque requirement of
the load should be understood before the inverter
and motor is selected.
By comparing the load/speed requirement with
the motor capability, the correct motor can be
selected. Remember a different pole pair
Torque
150%
100%
8-10
Short term (e.g. starting) operation possible
0 0.5
arrangement (nameplate rated speed) may give a
better match to the load needs.
Starting torque may need special consideration. If
a high starting torque is required this must be
considered during rating.
This type of starting duty is generally not
characteristic of fan and pump applications.
Load characteristics
Continuous operation possible
1.0 1.2 1.5
ECO REFERENCE MANUAL
Speed (X 50/60)