Motor Performance Fine Tuning; Motor Performance Fine Tuning; Parameters For Tuning The Drive - YASKAWA CIMR-JC4A0002BAA Quick Start Manual

5.2

Motor Performance Fine Tuning

This section offers helpful information for counteracting oscillation, hunting, or other faults
that occur while performing a trial run.
Note: This section describes parameters that are commonly edited. Consult Yaskawa for more information on
detailed settings and fine-tuning the drive.
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Parameters for Tuning the Drive

Problem
• Motor hunting and
oscillation at speeds
between 10 and 40
Hz
• Motor noise
• Motor hunting and
oscillation at speeds
up to 40 Hz
• Poor motor torque at
speeds below 10 Hz
• Motor hunting and
oscillation
• Poor motor torque at
low speeds
• Motor instability at
motor start
• Poor speed
precision
Note: Use slip compensation to improve speed precision. First make sure that the proper values have been set
for the motor rated current to E2-01, motor rated slip (E2-02), and motor no-load current (E2-03). Next,
adjust the slip compensation gain set to C3-01 so that it is between 0.5 to 1.5.
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
Table 5.1 Parameters for Tuning the Drive
Parameter
• If insufficient motor torque relative to the
size of the load causes hunting, reduce the
setting.
Hunting • When motor hunting and oscillation occur
Prevention Gain with a light load, increase the setting.
(n1-02)
• Lower this 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.
• If the motor noise is too loud, increase the
carrier frequency.
Carrier • When motor hunting and oscillation occur
Frequency at speeds up to 40 Hz, lower the carrier
Selection frequency.
(C6-02)
• The default setting for the carrier frequency
depends on the drive capacity (o2-04) and
the Drive Duty Selection (C6-01).
• If motor torque is insufficient at speeds
Torque
below 10 Hz, increase the setting.
Compensation
• If motor hunting and oscillation with a
Gain (C4-01)
relatively light load, decrease the setting.
• If torque is insufficient at speeds below 10
Mid Output
Hz, increase the setting.
Voltage A
• If motor instability occurs at motor start,
(E1-08)
decrease the setting.
Minimum
Note: The recommended setting value is for
Output Voltage
200 V class drives. Double this value when
(E1-10)
using a 400 V class drive.
• After setting the motor-rated current
Slip
(E2-01), motor-rated slip (E2-02) and motor
Compensation
no-load current (E2-03), adjust the slip
Gain (C3-01)
compensation gain (C3-01).
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5.2 Motor Performance Fine Tuning

Corrective Action
Default Suggested
Value Setting
1.00 0.00 to 2.00
7 (Swing
1 to 7
PWM)
1.00 0.50 to 1.50
E1-08:
18.4 V Initial value
E1-10: ±5 V
13.8 V
- 0.5 to 1.5
125
5