User Manual of EM730/EM730E Series Inverter increase the torque, i.e. the compensation for stator voltage drop. In the vector control mode, voltage feedforward adjustment is added to automatically The synchronous motor is subject to flux weakening control. F06.21 Ones place=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. adjustment. EM730/EM730E has two flux weakening modes:
direct calculation and automatic F06.21 Ones place=1, direct calculation target speed and can be adjusted manually via the option 06.22. The lower the flux weakening In the direct calculation mode, the flux weakening current is calculated according to the current, the lower the total output current will be, but the desired effect of flux weakening may not be achieved. F06.21 Ones place=2, automatic adjustment In the automatic adjustment, the optimal flux weakening current will be selected automatically, but it may affect the dynamic performance of the system or become unstable. proportional gain (F06.24) and integral time (F06.25).
However, fast adjustment of the flux The speed of flux weakening current adjustment can be changed by setting the 196 Function Default Function code name Parameter description Unit Attribute code setting 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 2 〇 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 ●