Hitachi Vector Control with the SJ300 Inverter

Vector control technical information
(2-5) Example of tuning effects (SLV mode)
This section shows examples of actual effects when changing each parameter by showing motor current
waveforms. Please note that these are just examples. Actual motor performance will depend on the application.
This data is reference only! It is only intended as a guide for obtaining optimal performance.
<Summary of examples>
Common condition
Ø INV : SJ300-007HFE (rated output current = 2.5A)
Ø Motor : Hitachi standard induction motor (380V 50Hz 0.75kW 1.9A 4p 1420rpm) No load (shaft free)
s Set frequency [F001] = 3.00Hz
s Acceleration time [F002] = 0.01s, Deceleration time [F003] = 0.01s
s Control mode [A044] = 03 ; SLV mode (open loop)
s All others are default settings
Parameter
Default parameter
Data00
comparison Data number Remarks
b083 : Carrier frequency 5.0 kHz 0.5 kHz
15 kHz
Data01
H003 : Motor kW 0.75 kW 75kW Data02
H004 : Motor poles
4 8 Data03 OC trip
H005 : Speed response factor K
1.590 0.100
10.00
Data04
H020 : Motor R1
11.93 Ω
3.000
30.00
Data05
H021 : Motor R2
6.392 Ω
3.000
30.00
Data06
H022 : Motor L 51.88 mH 10.00
200.0
Data07
Shock at start
H023 : Motor Io 1.26 A 0.3
3.0
Data08
OC trip
H024 : Total J
0.009 kgm
2
0.001
0.100
Data09
OC trip
H050 : P-gain of K
100 % 1
500
Data10
Shock at start
H051 : I-gain of K
100% 1
200
Data11
Note - the graphs show steady state operation for comparison purposes only. Response characteristics cannot
be determined from this data.
T
1 >
1) Ref A: 1 A 200 ms
Data00. Default parameter
Actual frequency (average) f(ave) = 2.88Hz
I
M
= 1.38Arms
T
T
T
T
T
1 >
2 >
3 >
1) Ref A: 2 A 200 ms
2) Ref A: 2 A 200 ms
3) Ref A: 2 A 200 ms
Data01. Carrier frequency 5kHz
à
0.5kHz / 15kHz
f (ave) = 2.92 Hz / 2.88Hz
I
M
= 1.42 Arms / 1.38
Default parameter
fc = 0.5kHz
fc = 15kHz