Lenze 8200 Frequency inverters - Manual (Page 160)

Configuration
8200SHB0199 7-23
Function when C014 = -4- The V/f-rated frequency influences the internal parameters of the motor model when using the
control mode ”motor current control”.
Adjustment Setting of C015 Motor connection Motor voltage Rated motor
frequency
50 Hz Y 230/400 V 50 Hz
52.6 Hz Y 220/380 V 50 Hz
50 Hz Y 280/480 V 60 Hz
50 Hz D 400/690 V
400 V
D
50 Hz
50 Hz
87 Hz D 230/400 V
280/480 V 50 Hz
60 Hz
90.9 Hz D 220/380 V 50 Hz
Note!
-
4-pole asynchronous motors, which are designed fro a rated frequency of
50 Hz at 230 V in star connection, can be operated in delta connection
when being constantly excited up to 87 Hz at 400 V.
- The motor current and the motor power are then increased by the factor
»
3 = 1.73.
- The field weakening range begins above 87 Hz.
-
Advantages:
- Higher speed-setting range
- 73 % higher power efficiency with standard motors.
- Improved motor cooling in the lower speed range with self-ventilated
motors.
-
In principle, this method can also be used with higher-pole motors (6, 8, ...).
- Observe the mechanical speed limit when using 2-pole asynchronous
motors.
Show/Hide Bookmarks