S0.21 Voltage boost
Setting range 0.0 % ~ 20.0 % (of rated motor voltage)
Minimum unit 0.1 %
Factory default 5.0 %
To obtain higher output torque and better stabilization, especially in low speed
range, the voltage generated at the motor resistor must be taken into account.
So, a voltage boost must be provided by setting corresponding parameters.
● [S0.21]=0.1 % ~ 20.0 %: manual voltage boost
This value demonstrates the voltage boost value at zero frequency. For other
frequency range, the voltage boost value is linear / square decreasing with in-
creasing output frequency before a certain frequency.
For linear V/F curve, this function is only valid before half of base frequency, for
example: if "Base frequency" [S2.00] is 50.00 Hz, then voltage boost function is
only valid before 25.00 Hz.
Fig. 8-19: Linear V/F curve manual voltage boost
For square V/F curve, this function is valid before base frequency, for example:
if base frequency is 50.00 Hz, then voltage boost function is only valid before
50.00 Hz.
EFC 3600
Bosch Rexroth AG
Parameter Settings
DOK-RCON03-EFC-3600***-IT03-EN-P
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