User Manual of A90 Series Inverter F06.17=0 : braking by the set current of F06.18 for zero servo operation; F06.17=1 : no processing; F06.17=2 : the inverter freely stop running with its output blocked. In the vector control mode, voltage feedforward adjustment is added to automatically increase the torque, i.e. the compensation for stator voltage drop. The synchronous motor is subject to flux weakening control. F06.21=0: invalid Flux weakening control is not performed. The maximum speed of the motor is related to the bus voltage of the inverter.
When the maximum speed of the motor does not meet user requirements, the flux weakening function of the synchronous motor should be enabled to increase the speed. A90 has two flux weakening modes: direct calculation and automatic adjustment. F06.21=1: direct calculation In the direct calculation mode, the flux weakening current is calculated according to the target speed and can be adjusted manually via the option 06.22. The lower the flux weakening current, the lower the total output current will be, but the desired effect of flux weakening may not be achieved.
178 Function Default t setting Function code name Parameter description Uni Attribute code F06.20 Voltage feedforward gain 0 - 100 % 0 ● Function Default Function code name Parameter description Unit Attribute code setting F06.21 Flux weakening control options 0: Invalid 1: direct calculation 2: automatic adjustment 1 ○ F06.22 Flux weakening voltage 70.00-100.00 % 100.00 ● F06.23 Maximum flux weakening current of synchronous motor 0.0-150.0 (100.0 is the rated current of the motor) % 100.0 ● F06.24 Proportional gain of flux weakening regulator 0.00 - 10.00 0.50 ● F06.25 Integral time of flux weakening regulator 0.01 - 60.00 s 2.00 ●