Closed Loop Vector Control Method; Advanced Open Loop Vector Control Method - Omron Q2A Series Technical Manual

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Closed Loop Vector Control Method

Table 4.19 Parameters for Fine Tuning the Drive (Closed Loop Vector Control Method)
Issue
• Torque or speed response are slow.
• Hunting or oscillation
The drive cannot find ASR proportional
gain or integral time for low speed or
high speed.
Hunting or oscillation
• The volume of the motor excitation
sound is too high.
• Hunting or oscillation at low speeds
(3 Hz or lower)
*1 Refer to the section on C5: ASR - SPEED REGULATION parameters for more information about speed control (ASR).
*2 Default value changes when o2-04 [Drive KVA Selection] and C6-01 [ND/HD Duty Selection] values change.
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Advanced Open Loop Vector Control Method

Table 4.20 Parameters for Fine Tuning the Drive (Advanced Open Loop Vector Control Method)
Issue
• oS [Overspeed] occurs.
• Hunting or oscillation.
The volume of the motor excitation
sound is too high.
Speed precision is unsatisfactory
• Torque or speed response are
slow.
• Hunting or oscillation
The drive cannot find speed response
for low speed or high speed.
Hunting or oscillation
*1 Default value changes when o2-04 [Drive KVA Selection] and C6-01 [ND/HD Duty Selection] values change.
*2 Default value changes when o2-04 [Drive KVA Selection] value changes.
*3 Refer to the section on C5: ASR - SPEED REGULATION parameters for more information about speed control (ASR).
*4 The best values for a no-load operation are different than the best values for actual loading operation.
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
4.8 Fine Tuning during Test Runs (Adjust the Control Function)
Parameter
Number
• High speed
• If torque or speed response are slow, increase the setting
C5-01 [ASR
PGain 1] value in increments of 5.00.
• Low speed • If hunting or oscillation occur, decrease the setting
C5-03 [ASR value.
*1
PGain 2]
• High speed
• If torque or speed response are slow, decrease the
C5-02 [ASR
ITime 1] setting value.
• Low speed • If hunting or oscillation occur, increase the setting
C5-04 [ASR value.
*1
ITime 2]
C5-07 [ASR Gain
Change the ASR proportional gain and ASR integral time
Switch Frequency]
to conform to the output frequency.
*1
• If torque or speed response are slow, decrease the
setting value in increments of 10 ms.
C5-06 [ASR Delay
*1
Time]
• If the rigidity of the machine is unsatisfactory and
vibration is possible, increase the setting value.
• If the volume of the motor excitation sound is too high,
increase the carrier frequency.
C6-02 [Carrier
Frequency Selection]
• If hunting or oscillation occur at low speeds, decrease
the carrier frequency.
Parameter Number
• Make sure that the output of the drive and the motor
are connected correctly.
T1-01 [Auto-tuning Mode
Selection]
• Decouple the motor and machine and do Rotational
Auto-Tuning.
C6-02 [Carrier Frequency If the volume of the motor excitation sound is too high,
Selection] increase the carrier frequency.
• Decouple the motor and machine and do Rotational
Auto-Tuning.
• If the motor speed is slow, increase the value of E2-
02 in small increments (approximately 0.1% of the
E2-02 [Mot Rated Slip]
default setting value).
• If the motor speed is fast, decrease the value of E2-
02 in small increments (approximately 0.1% of the
default setting value).
• High speed • If torque or speed response are slow, increase the
C5-01 [ASR PGain 1] setting value in increments of 5.00.
• Low speed • If hunting or oscillation occur, decrease the setting
*3
C5-03 [ASR PGain 2] value.
• High speed • If torque or speed response are slow, decrease the
C5-02 [ASR ITime 1] setting value.
• Low speed • If hunting or oscillation occur, increase the setting
*3
C5-04 [ASR ITime 2] value.
• C5-07 [ASR Gain Switch
*4
Frequency]
• High speed
C5-01 [ASR PGain 1] Change the ASR proportional gain and ASR integral
C5-02 [ASR ITime 1] time to conform to the output frequency.
• Low speed
*3
C5-03 [ASR PGain 2]
C5-04 [ASR ITime 2]
• If torque or speed response are slow, decrease the
setting value in increments of 10 ms.
*4
C5-06 [ASR Delay Time]
• If the rigidity of the machine is unsatisfactory and
vibration is possible, increase the setting value.
Solution
20.00
0.500 s
0.0 Hz
4 ms
1 (2.0 kHz)
Solution
1 (2 kHz)
*2
20.00
0.500 s
0.0 Hz
4 ms
Default Recommended Setting
Setting
10.00 - 50.00
0.300 to 1.000 s
0.0 Hz to maximum output
frequency
4 to 20 ms
*2
2.0 kHz to upper limit value
Default Recommended Setting
Setting
- 0
*1
1 to upper limit value
Set to a value that is ±5% of
the current value.
10.00 - 50.00
0.300 to 1.000 s
0.0 to maximum output
frequency
4 to 20 ms
4
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