Veikong VFD500 Series User Manual page 91

Chapter 5 Function code
Function
Parameter name
code
Carrier frequency
P22.04 switching point 1
Carrier frequency
P22.05
switching point2
PWM modulation
P22.06
method
P22.07 DPWM switching point
P22.08 Modulating limit
P22.10 AVR function
VFD500 high performance vector control frequency inverter user manual
Description
0.00Hz～600.00HzWhen the carrier
frequency is adjusted according to the
output frequency, the carrier frequency
set by P22.02 is used when the output
frequency is lower than this set value.
0.00Hz～600.00Hz When the carrier
frequency is adjusted according to the
output frequency, the carrier frequency
set by P22.03 is used when the output
frequency is higher than this set value.
0：SVPWM
It is normally used
1：SVPWM+DPWM
Using this modulation method can reduce
the switching loss of the inverter and
reduce the probability of overheating
alarm of the inverter; however, the
electromagnetic noise of the motor in the
medium speed section will be too large.
2：PWM at random
The electromagnetic noise generated by
the motor is white noise, not a sharp
squeak.
3：SPWM
It is only used in special situation
10%～100%(modulation percentage)
When P22.06 is set to 1, increasing this
setting value can reduce the
electromagnetic noise in the middle
speed section.
100%-110%
It is used to define the duty cycle of the
inverter side IGBT. Overmodulation is
allowed when it is set to 100% or more,
and the allowable overmodulation is
deepened when the set value is
increased from 101 to 110.
0:diabled
1:enabled
When the AVR function is enabled, the
effect of the DC bus voltage change on
the output voltage can be eliminated.
- 89-
Default Property
10.00Hz
☆
50.00Hz
☆
0
★
30%
★
105%
★
1
★