YASKAWA T1000V, Техническое руководство

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236 YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
6.2 Motor Performance Fine Tuning
6.2 Motor Performance Fine Tuning
This section offers helpful information for counteracting oscillation, hunting, or other faults that occur while performing
a trial run. Refer to the section below that corresponds to the motor control method used.
Note: This section describes parameters that are commonly edited. Consult Yaskawa for more information on detailed settings and
fine-tuning the drive.
◆ V/f Motor Control Method Tuning
Table 6.1 Parameters for Tuning the Drive in V/f Motor Control Method
Note: Use slip compensation to improve speed precision in V/f Control. 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.
◆
Open Loop Vector (OLV) Motor Control Method Tuning
Table 6.2 Parameters for Tuning the Drive in OLV Motor Control Method
Problem Parameter No. Corrective Action
Default
Value
Suggested
Setting
• Motor hunting and oscillation
at speeds between 10 and 40 Hz
Hunting Prevention
Gain (n1-02)
• If insufficient motor torque relative to the size of the load
causes hunting, reduce the setting.
• When motor hunting and oscillation occur with a light
load, increase the setting.
• 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.
1.00 0.10 to 2.00
• Motor noise
• Motor hunting and oscillation
at speeds up to 40 Hz
Carrier Frequency
Selection (C6-02)
• If the motor noise is too loud, increase the carrier
frequency.
• When motor hunting and oscillation occur at speeds up to
40 Hz, lower the carrier frequency.
• The default setting for the carrier frequency depends on
the drive capacity (o2-04) and the Drive Duty Selection
(C6-01).
Determined
by o2-04
and C6-01
1 to 6
• Poor torque or speed response
• Motor hunting and oscillation
Torque
Compensation
Primary Delay Time
(C4-02)
• If motor torque and speed response are too slow, decrease
the setting.
• If motor hunting and oscillation occur, increase the
setting.
200 ms
<1>
<1> The default value is determined by the control mode (A1-02). The value shown here is the default when using V/f Control.
100 to 1000 ms
• Poor motor torque at speeds
below 10 Hz
• Motor hunting and oscillation
Torque
Compensation Gain
(C4-01)
• If motor torque is insufficient at speeds below 10 Hz,
increase the setting.
• If motor hunting and oscillation with a relatively light
load, decrease the setting.
1.00 0.50 to 1.50
• Poor motor torque at low
speeds
• Motor instability at motor start
Mid Output Voltage
A (E1-08)
Minimum Output
Voltage (E1-10)
• If torque is insufficient at speeds below 10 Hz, increase
the setting.
• If motor instability occurs at motor start, decrease the
setting.
Note: The recommended setting value is for 200 V class
drives. Double this value when using a 400 V class drive.
E1-08:
16.0 V
E1-10:
12.0 V
<1>
Initial value ±5 V
• Poor speed precision
Slip Compensation
Gain (C3-01)
• After setting the motor-rated current (E2-01), motor-
rated slip (E2-02) and motor no-load current (E2-03),
adjust the slip compensation gain (C3-01). - 0.5 to 1.5
Problem Parameter No. Corrective Action Default Value
Suggested
Setting
• Poor motor torque and speed
response
• Control motor hunting and
oscillation at speeds between 10
and 40 Hz.
AFR Gain
(n2-01)
• If motor torque and speed response are too slow,
gradually decrease the setting by 0.05.
• If motor hunting and oscillation occur, gradually
increase the setting by 0.05.
1.00 0.50 to 2.00