Motor data and controller adjustments of the synchronous motor
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.6 - 9
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1. Calculate: Ec.07 * pole-pair number / 65536
2. Take the decimal places of this result
3. Ec.02 or Ec.12 = decimal places * 65536
Example.: Ec.07 = 49000
ppz = 3
49000 x 3
—————
65536
Intermediate value = = 2.24304
Use only decimal places:
Ec.02 = 0.24304 x 65536 = 15928
Additionally, one has to be aware that the resolver cables for the S4-systems are incompatible with the corre-
sponding F5-cables.
7.6.2.3 Speed measurement
Adjustments shall be made in the Ec parameters in order to operate the servo system (depending on the used
encoder system).
See chapter 7.11 „speed measurement“.
7.6.3 Speed-controlled operation without encoder feedback (SCL)
7.6.3.1 General
With this software the speed of the motor can be calculated by the measured currents and the motor data (by
means of a model). This calculated speed can be used as feedback for the speed controller. The necessary
motor data for the model can be identied by the KEB COMBIVERT itselfs. Static operation with small frequen-
cies must be avoided, because the model can become unstable. The usable frequency range is approx. 1:100.
At setpoint speed 0, the speed control is deactivated and the motor is aligned using a predened DC current.
The software version 2.x is only ready to run on the new control hardware xA.F5.230-0018 or -0019.
No compatibility exists between the previous versions 1.x and the versions 2.x; Parameter
lists of the old versions must be adjusted accordingly!
7.6.3.2 Initial settings for sensorless operation
The following adjustments are default values and must not be adjusted:
- The controller conguration cS.00 must set to value „4: speed control“.
- The actual source cS.01 must set to value „2: calculated actual value“.
- The break handling Pn.34 must be activated (default value = 2: without display)
- The motor model nn.00 must be set to value "191".
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