Motor Performance Fine Tuning; Motor Performance Fine Tuning; V/F Motor Control Method Tuning; Open Loop Vector (Olv) Motor Control Method Tuning - Omron V1000 User 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 OYMC for more information on detailed settings and fine-tuning
the drive.
u

V/f Motor Control Method Tuning

Table 6.1 Parameters for Tuning the Drive in V/f Motor Control Method
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 torque or speed response
• Motor hunting and oscillation
• 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
<1> Default settings change when the Control Method is changed (A1-02) or a different V/f pattern is selected using parameter E1-03. The default
setting shown is for V/f Control.
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.
u

Open Loop Vector (OLV) Motor Control Method Tuning

Table 6.2 Parameters for Tuning the Drive in OLV Motor Control Method
Problem
• Poor motor torque and speed
response
• Control motor hunting and
oscillation at speeds between 10
and 40 Hz.
• Poor motor torque and speed
response
• Control motor hunting and
oscillation at speeds between 10
and 40 Hz.
224
Parameter No.
• 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
Hunting Prevention
load, increase the setting.
Gain (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.
• When motor hunting and oscillation occur at speeds up to
Carrier Frequency
40 Hz, lower the carrier frequency.
Selection (C6-02)
• The default setting for the carrier frequency depends on
the drive capacity (o2-04) and the Drive Duty Selection
(C6-01).
Torque • If motor torque and speed response are too slow, decrease
Compensation the setting.
Primary Delay Time • If motor hunting and oscillation occur, increase the
(C4-02) setting.
• If motor torque is insufficient at speeds below 10 Hz,
Torque
increase the setting.
Compensation Gain
• If motor hunting and oscillation with a relatively light
(C4-01)
load, decrease the setting.
• If torque is insufficient at speeds below 10 Hz, increase
Mid Output Voltage the setting.
A (E1-08) • If motor instability occurs at motor start, decrease the
Minimum Output setting.
Voltage (E1-10) Note: The recommended setting value is for 200 V class
drives. Double this value when using a 400 V class drive.
• After setting the motor-rated current (E2-01), motor-rated
Slip Compensation
slip (E2-02) and motor no-load current (E2-03), adjust the
Gain (C3-01)
slip compensation gain (C3-01).
Parameter No.
• If motor torque and speed response are too slow,
AFR Gain gradually decrease the setting by 0.05.
(n2-01) • If motor hunting and oscillation occur, gradually
increase the setting by 0.05.
• To improve motor torque speed response,
gradually reduce this setting by 10 ms and check
the performance.
• If motor hunting and oscillation occur as a result
AFR Time Constant 1 of load inertia, gradually increase the setting by
(n2-02) 50 ms and check the performance.
Note: Ensure that n2-02 ≤ n2-03. When making
adjustments to n2-02, set C4-02 (Torque
Compensation Primary Delay Time Constant 1)
accordingly.
Corrective Action
Corrective Action
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
Default Suggested
Value Setting
1.00 0.10 to 2.00
7 (Swing
1 to A
PWM 1)
<1>
100 to 1000 ms
200 ms
1.00 0.50 to 1.50
E1-08:
16.0 V
E1-10:
Initial value ±5 V
12.0 V
<1>
- 0.5 to 1.5
Suggested
Default Value
Setting
1.00 0.50 to 2.00
50 ms 50 to 2000 ms