GD350A series high-performance multifunction VFD
-154-
Function
code
Name
Description
Default Modify
P03.00
Speed-loop
proportional gain 1
The parameters P03.00–P03.05
are
applicable only to vector control mode. Below
the switching frequency 1 (P03.02), the
speed-loop PI parameters are: P03.00 and
P03.01. Above the switching frequency 2
(P03.05), the speed-loop PI parameters are:
P03.03 and P03.04. PI parameters are
obtained according to the linear change of two
groups of parameters. See the following
figure:
Output frequency f
PI parameter
P03.02 P03.05
P03.03
，
P03.04
P03.00
，
P03.01
The speed loop dynamic response
characteristics of vector control can be
adjusted by setting the proportional coefficient
and integral time of speed regulator.
Increasing proportional gain or reducing
integral time can accelerate dynamic
response of speed loop; however, if the
proportional gain is too large or integral time is
too small, system oscillation and overshoot
may occur; if proportional gain is too small,
stable oscillation or speed offset may occur.
PI parameters have a close relationship with
the inertia of the system. Adjust PI parameters
depending on different loads to meet various
demands.
Setting range of P03.00: 0.0–200.0
Setting range of P03.01: 0.000–10.000s
Setting range of P03.02: 0.00Hz–P03.05
Setting range of P03.03: 0.0–200.0
Setting range of P03.04: 0.000–10.000s
Setting range of P03.05: P03.02–P00.03
20.0
○
P03.01
Speed-loop integral
time 1
0.200s
○
P03.02
Low-point
frequency for
switching
5.00Hz
○
P03.03
Speed-loop
proportional gain 2
20.0
○
P03.04
Speed-loop integral
time 2
0.200s
○
P03.05
High-point
frequency for
switching
10.00Hz
○
