User Manual of EM730/EM730E Series Inverter
196
In the vector control mode, voltage feedforward adjustment is added to automatically
increase the torque, i.e. the compensation for stator voltage drop.
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
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
●
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.
EM730/EM730E has two flux weakening modes: direct calculation and automatic
adjustment.
F06.21 Ones place=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.
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.
The speed of flux weakening current adjustment can be changed by setting the
proportional gain (F06.24) and integral time (F06.25). However, fast adjustment of the flux
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
F06.20
Voltage feedforward
gain
0 - 100
%
0
●
