User Manual
EM303B General Purpose Inverter
119
In torque control mode, the inverter controls the torque current of motor, so the motor speed
is beyond control. If the input torque command does not match the load, the motor may
accelerate or accelerate in opposite direction continuously. F5-14 is to limit the motor speed
threshold in torque control mode. When the motor reaches the speed threshold, torque
current is determined by the load torque, but beyond control of the torque current setting
value, i.e. the speed will not rise and remain the threshold. If motor speed drops, the torque
current will be controlled by setting value again.
F5-14=0
Defined by upper limit frequency (F0-17).
F5-14=1
Defined by VS* upper limit frequency.
F5-14=2
Defined by IS *upper limit frequency.
F5-14=3
Defined by VF*upper limit frequency.
F5-14=4
Defined by IF*upper limit frequency.
The analog signal here means gain.
Gain value= Voltage/10*100% or current/20* 100%.
No.
Function
Range
Unit
Default
Type
F5-15
Static friction compensation coefficient 0.00
~
150.00
%
0
●
F5-17
Static friction acting cut-off frequency
0.00
~
50.00
Hz
2.00
〇
In torque mode, the system with large inertia or static friction coefficient generally requires
sufficient torque to get a start. The torque compensation against static friction can be
acquired by F5-15 and F5-17 together.
Static friction coefficient refers to the additional torque value in normal torque setting.
Starting torque can be regulated by this code.
After estimated frequency reaches at static friction acting cut-off frequency, static friction
compensation is out of effect, and the motor runs as per normal torque setting.
No.
Function
Range
Unit Default Type
F5-20
Gain of VVF Excitation Current
Regulation
0
~
60000
0
●
F5-21
Integral Time of VVF Excitation
Current Regulation
0.00
~
600.00
mS
0.00
●
F5-20 and F5-21 are the parameters of vector control excitation current regulator, and will
affect system performance and stability directly. User does not need to change the defaults on
general conditions.
No.
Function
Range
Unit Default Type
F5-22
Positive/Negative Torque
Control
0: Positive/Negative Torque
Permitted
1: Negative Torque Prohibited
0
〇
F5-23
Positive/Negative Torque
Deadband Time
0.00
~
600.00
S
0.00
〇