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Bosch Rexroth EFC 3600 Operating Instructions Manual page 80

Frequency converter
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Bosch Rexroth AG
Parameter Settings
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. This voltage boost is dependent on the corresponding param‐
eters.
● [S0.21]=0.1 % ~ 20.0 %: manual torque boost
This value demonstrates the voltage boost value at zero frequency. For other fre‐
quency range, the voltage boost value is linear / square decreasing with increasing
output frequency before a certain frequency.
For linear V/F curve, this function is only valid before half of base frequency, for ex‐
ample: if "Base frequency" [S2.00] is 50.00 Hz, then torque boost function is only
valid before 25.00 Hz.
Fig.8-16: Linear V/F curve manual torque increase
For square V/F curve, this function is valid before base frequency, for example: if
base frequency is 50.00 Hz, then torque boost function is only valid before 50.00 Hz.
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DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
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