
094
Notice
◇
In common V/F mode, auto torque boost
mode is invalid.
◇
Auto torque boost mode is only valid in
advanced V/F mode.
The speed of asynchronous motor will
decrease after loading, but can approach
synchronous speed by slip compensation, so
as to improve the control precision of motor
speed; the default rated slip in vector V/F
control mode is 100.0%.
F5.09
V/F control slip frequency
compensation
0.0 ~ 200.0% *rated slip
0.0%
0: VF half separated mode, open loop voltage
output
In this control mode, VFD starts in normal V/
F curve, and adjusts voltage to value of set
target voltage after reaching set frequency
point. No feedback for voltage in this mode,
and the target voltage value is open loop
setting.
F5.12
Separated type V/F control selection
0 ~ 3
0
This parameter is used to adjust the response
speed of slip frequency compensation. The
greater of this set value, the slower of the
response speed, and the steadier the motor
speed.
F5.10
V/F control slip frequency filtering
coefficient
1 ~ 10
3
In auto torque boost mode, this parameter
is used to adjust response speed of torque
compensation. The greater of this set value,
the slower of the response speed, and the
steadier the motor speed.
F5.11
V/F control torque frequency
compensation filtering coefficient
0 ~ 10
0
Fig. F5-4 Voltage Control Mode 0
F0——set frequency, V0——corresponding
rated voltage of set frequency, U*/U1*—F5. 13
setting value of given channel.
As showed in the above figure, the voltage
is adjusted after stabilization of point a
frequency. According to value of target voltage
and input voltage, the voltage point may
move towards point b (increase) or point c
(decrease), until reaching target value.
1: VF half separated mode, voltage closed-
loop output
The only difference of this mode from
mode 0 is that it introduced voltage closed-
loop. Through PI adjustment of deviation
of feedback voltage compared with set
voltage, a steadier voltage can be acquired.
This method can compensate target voltage
deviation caused by load change, so as to
acquire a higher precision of voltage control
and a faster response.
0VUQVU
7PMUBHF
0VUQVU
'SFR
6
C
B
D
6
G
6
4.2 Detailed Function Description
Содержание SKI600
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