KEB COMBIVERT F5-A, Applications Manual, Page: 169 / 552

Motor data and controller adjustments of the asynchronous motor
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.5 - 7
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7.5.1.5 Switching frequency (uF.11)
Information on the carrier frequencies can be found in chapter 7.10.3 "Carrier frequencies and Derating".
7.5.1.6 Energy saving function (uF.06...08)
The energy saving function allows the lowering or raising of the current output voltage. Corresponding to the
activation conditions defined in uF.06, the voltage
corresponding to the V/f characteristic is scaled by the energy
saving factor (uF.07).
If torque compensation is active (s. chapter 7.5.1.7), the energy saving function is used for control optimization.
The V/f characteristic will then not be affected.
The maximum output voltage cannot be higher than the input voltage, even for a factor > 100 %.
The function is used for example in cyclic executed load/no-load applications. During the no-load phase the
speed is maintained, but energy is saved as a result of the voltage reduction.
uF.07 Energy saving factor
0.0…130.0 % (default 70 %)
uF.08 Energy saving input selection
0...4095 (Default 0)
For the assignment of the inputs to the parameter values, refer to chapter 7.3.1 "digital inputs".
uF.06 Energy saving mode
Bit Description Value Function
0...3 Activation
0 generally off
1 generally active
2 at actual value = setpoint
3 via digital input
4 at clockwise rotation
5 at counter clockwise rotation
6 at constant run clockwise
7 at constant run counter-clockwise
8...15 generally off
4...7 Voltage ramp
0 Standard time *
16 time / 2
32 time / 4
48 time / 8
64 time / 16
* default setting 1.6s
7.5.1.7 SMM (sensorless motor management)
The SMM-function (sensorless motor management) includes the torque and slip compensation. These two
functions can be activated separately. For an optimal control characteristic, the combination of both functions
is required.
Setting the correct motor data is required, since they are used in calculations needed by the inverter to achieve
the best possible results in the control of boost and slip.