HV350 Mini Frequency Inverter User Manual
65
P4.09 AVR function
Setting range: 0, 1
0: Disabled;
1: Enabled
AVR is auto voltage regulation. When the inverter's input voltage differs with the rated input
voltage, the inverter's output voltage can be stablized by adjusting the width of PWM wave.
This function is disabled when the output voltage is higher than input voltage.
P5 Vector control funtion
P5.00 ASR proportional gain 1
Setting range:0.00
～
10.00
P5.01 ASR integration time 1
Setting range:0.00
～
10.00
P5.02 ASR proportional gain 2
Setting range:0.00
～
10.00
P5.03 ASR integration time 2
Setting range:0.00
～
10.00
P5.04 ASR switching frequency
Setting range:0.0
～
99.99Hz
Through P5.00~P5.04, user can set the proportional gain P and integration time I of speed
regulator, so as to change the speed response characteristic.
a.
Speed regulator (ASR)'s structure is shown in Fig.6-14, where K
P
is proportional gain P,
and K
I
is integration time I.
Speed error
Frequency
instruction
Actual speed
+
-
Torque limit
（
P5.07
，
P5.08
）
Given torque current
Fig. 6-14 Simplified block diagram of ASR
If the integral time is set to 0 (P5.01=0, P5.03=0), which means integral function is disabled,
and the speed loop is simply a proportion regulator.
a.
Adjustment of proportion gain P and integration time I for speed regulator
Increasing P will fasten system transient response, but system oscillation may occur
given too big P. Decreasing I will fasten transient response, but system oscillation and
overshoot may occur given too small.
Normally, user may tune P first, increase its value as long as no system oscillation
occurs; then adjust I, ensuring fast response without overshoot. Figure 6-15 shows
better speed step response if P, I are set properly. Speed response can be monitored
through analog terminals AO1 and AO2. Refer to P8 parameter group for detail
information.
)
KiS
1
+
(1
K
P
