Yaskawa CIMR-UU4A0034A [327/644] Fine tuning open loop vector control for pm motors

Yaskawa CIMR-UU4A0040A [327/644] Fine tuning open loop vector control for pm motors
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Fine-Tuning Open Loop Vector Control for PM Motors
Table 6.4 Parameters for Fine-Tuning Performance in OLV/PM
Problem Parameter No. Corrective Action Default
Suggested
Setting
Undesirable motor
performance
Motor parameters
(E1-oo, E5-oo)
Check the settings for base and maximum frequency in the
E1-oo parameters.
Check E5-oo parameters and set motor data correctly. Do
not
enter line-to-line
data where single-phase data is required,
and vice versa.
Perform Auto-Tuning.
- -
Poor motor torque and
speed response
Load Inertia (n8-55)
Adjust parameter n8-55 to meet the load inertia ratio of the
machine.
0
Close to the actual
load inertia ratio
Speed Feedback
Detection Control Gain
(for PM Motors) (n8-45)
Increase the speed feedback detection control gain (n8-45). 0.8
Increase in
increments of 0.05
Torque Compensation
Gain (C4-01)
Enable torque compensation.
Note: Setting this value too high can cause
overcompensation and motor oscillation.
0 1
Oscillation at start or the
motor stalls
Acceleration/
Deceleration Pull-In
Current (for PM Motors)
(n8-51)
Increase the pull-in current in n8-51 50%
Increase in steps
of 5%
DC Injection Braking
Current (b2-02), DC
Injection Time at Start
(b2-03)
Use DC Injection Braking at start to align the rotor. This may
cause a short reverse rotation at start.
b2-02 = 50%
b2-03 = 0.0 s
b2-03 = 0.5 s
Increase b2-02 if
needed
Load Inertia (n8-55)
Increase the load inertia ratio.
Note: Setting this value too high can cause
overcompensation and motor oscillation.
0
Close
to the actual
load inertia ratio
Stalling or oscillation
occur when load is
applied during constant
speed
Pull-In Current
Compensation Time
Constant (for PM
Motors) (n8-47)
Reduce n8-47 if hunting occurs during constant speed. 5.0 s
Reduce in
increments
of 0.2 s
Pull-In Current (for PM
Motors) (n8-48)
Increase the pull-in current in n8-48. 30%
Increase in
increments of 5%
Load Inertia (n8-55) Increase the load inertia ratio. 0
Close to the actual
load inertia ratio
Hunting or oscillation
occur
Speed Feedback
Detection Control Gain
(for PM Motors) (n8-47)
Reduce the speed feedback detection gain in n8-45. 0.8
Increase in
increments 0.05
STo fault trips when the
load is not excessively
high
Motor Induction Voltage
Constant 1/2 (Ke) (for
PM Motors) (E5-09 or
E5-24)
Check and adjust the induced voltage constant.
Check the motor nameplate and the data sheet or contact the
motor manufacturer.
Depends on
drive
capacity and
motor code
Refer to the motor
data sheet or the
nameplate.
Stalling or STo occurs at
high speed as the output
voltage becomes
saturated
Output Voltage Limit
(for PM Motors) (n8-62)
Set the value of the input voltage to parameter n8-62.
200 Vac
(200 V class)
400 Vac
(400 V class)
Set equal to input
voltage
6.2 Motor Performance Fine-Tuning
YASKAWA ELECTRIC SIEP C710636 04C U1000 Industrial MATRIX Drive Technical Manual
327
6
Troubleshooting

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