Hitachi Vector Control with the SJ300 Inverter Application Note page 7

Table 2 shows suggestions for adjusting the SLV and other related parameters to correct various phenomena.
# Phenomena
Actual speed is faster than the target speed.
1
(Speed deviation is +)
Actual speed is slower than the target speed.
2
(Speed deviation is - )
Insufficient torque at low speed (~ few Hz)
3
4 Shock at start
5 Unstable motor rotation
Insufficient torque at low speed due to torque
6
limit action
7 Response is slow
Speed overshoot due to too quick
8
response
*Refer to Table 3 for a standard (default) motor parameter settings for SJ300 series inverter.
© 2002 Hitachi America, Ltd. © 2002 Hitachi America, Ltd. © 2002 Hitachi America, Ltd.
Table 2. Suggestions for tuning
Parameter
H021
H021
H020
H023
H024
H005
H024
H006
A045
A081
b083
b021,
b041
~b044
H005
H050
H051
H005
H050
H051
7
How to adjust
Decrease R2 value
(Minimum target is 80% of the preset value)
Increase R2 value
(Maximum target is 120% of the preset value)
Increase R1 value
(Maximum target is 120% of the preset value)
Increase Io value
(Maximum target is 120% of the preset value)
Decrease J
Decrease speed response factor
Decrease J
Increase / decrease stability control factor
(Increase or decrease depends on the situation.)
Decrease output gain
Set AVR function to OFF
Decrease carrier frequency
Set;
Torque limit level > Overload restriction level
Increase speed response factor
Increase P-gain of speed response factor
Decrease I-gain of speed response factor
Decrease speed response factor
Decrease P-gain of speed response factor
Increase I-gain of speed response factor