KEB COMBIVERT F5-A Applications Manual page 222

Motor data and controller adjustments of the synchronous motor
HF supply
The rotor position can be determined continuously with a test signal for operation at standstill and low speed.
HF supply is only possible with a switching frequency of 8 or 16 kHz. The power unit must supply the required
current also at 0 Hz and 8 or 16 kHz.
The internal FoH filter is used for HF supply. The default values of parameters fh.01... fh.09 are preset to 1 kHz
with quality factor 5. If the HF injection is used the speed controller must be adjusted a little softer.
Since the HF supply has only advantages in the lower speed range, it is switched off above nn.03. When falling
below nn.02 the HF supply is switched on again. The HF supply is advantageous only in lower speed range if
there are problems with the motor model.
nn.14 HF supply amplitude
The signal amplitude of the HF supply can be modified here. A higher value means more information, but also
higher losses and a higher noise level.
The default value is selected by way that 1/8 of the rated motor current is used. But maximally 25% of the ma-
ximum output voltage.
nn.15 HF supply optimization
The Pi-controller for speed determination at HF injection can be modified here. This Pi-controller is paramete-
rized by dr.31, dr.64, nn.14 and nn.15.
nn.17 speed limit open-loop operation
The speed limit for the speed limit open-loop operation is now separately adjustable from the additional ramp via nn.17. In
order that all remains downward compatible, nn.08 is still active for the speed limit open-loop operation, if nn.17 is set to 0.
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