Yaskawa CIMR-UU4A0034A [324/644] Motor performance fine tuning

Yaskawa CIMR-UU4A0021A [324/644] Motor performance fine tuning
6.2 Motor Performance Fine-Tuning
This section offers
helpful information for counteracting oscillation, hunting, and other problems that occur while performing
a trial run. Refer to the section below that corresponds to the motor control method used.
Note: This section describes commonly edited parameters that may be set incorrectly. Consult Yaskawa for more information on detailed settings
and for fine-tuning the drive.
u
Fine-Tuning V/f Control and V/f Control with PG
Table 6.1 Parameters for Fine-Tuning Performance in V/f and V/f w/PG
Problem Parameter No. Corrective Action Default
Suggested
Setting
Motor hunting and
oscillation at speeds
between 10 and 40 Hz
Hunting Prevention
Gain Setting (n1-02)
Reduce the setting if insufficient motor torque relative to the
size of the load causes hunting.
Increase the setting
when motor hunting and oscillation occur
with a light load.
Reduce the setting if hunting occurs when using a motor with
a relatively low inductance, such as a high-frequency motor or
a motor with a larger frame size.
1.00 0.10 to 2.00
Motor noise
Motor hunting and
oscillation at speeds
up to 40 Hz
Carrier Frequency
Selection (C6-02)
Increase the carrier frequency If the motor noise is too loud.
Lower the carrier frequency when motor hunting and
oscillation occur at speeds up to 40 Hz.
The default setting for the carrier frequency depends on the
drive model selection (o2-04) and the drive duty mode
selection (C6-01).
1 (4 kHz) 1 to max. setting
Poor torque or speed
response
Motor hunting and
oscillation
Torque Compensation
Primary Delay Time
(C4-02)
Reduce the setting if motor torque and speed response are too
slow.
Increase the setting if motor hunting and oscillation occur.
200 ms 100 to 1000 ms
Poor motor torque at
speeds below 10 Hz
Motor hunting and
oscillation
Torque Compensation
Gain (C4-01)
Increase the setting if motor torque is insufficient at speeds
below 10 Hz.
Reduce the setting if motor hunting and oscillation with a
relatively light load.
1.00 0.50 to 1.50
Poor motor torque at
low speeds
Motor instability at
motor start
Middle Output
Frequency Voltage
(E1-08)
Minimum Output
Frequency Voltage
(E1-10)
Increase the setting if motor torque is insufficient at speeds
below 10 Hz.
Reduce the setting If motor instability occurs at motor start.
Depends on
o2-04, Drive
Model
Selection
Default setting
±5 V
Poor speed precision
(V/f control)
Slip Compensation Gain
(C3-01)
Set the motor-rated current (E2-01), motor-rated slip (E2-02),
and motor no-load current (E2-03), then adjust the slip
compensation gain (C3-01).
0.0
(no slip
compen-
sation)
0.5 to 1.5
Poor speed precision
(V/f control with PG)
ASR Proportional Gain
1 (C5-01)
ASR Integral Time 1
(C5-02)
<1>
<2>
Adjust the ASR proportional gain 1 (C5-01) and the ASR integral
time 1 (C5-02).
C5-01: 0.20
C5-02: 0.200 s
Proportional gain
= 0.10 to 1.00
Integral time =
0.100 to 2.000 s
<1> ASR in V/f Control with PG only controls the output frequency, and does not allow the same high gain settings as CLV control.
<2> Refer to C5: Automatic Speed Regulator (ASR) on page 197 for details on ASR.
6.2 Motor Performance Fine-Tuning
324
YASKAWA ELECTRIC SIEP C710636 04C U1000 Industrial MATRIX Drive Technical Manual

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