Open Loop Vector (Olv) Motor Control Method Tuning - YASKAWA V1000 Technical Manual

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Open Loop Vector (OLV) Motor Control Method Tuning

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.
• Overvoltage trips when
accelerating, decelerating, or
during sudden speed or load
changes.
• Poor motor torque and speed
response
• Motor hunting and oscillation.
• Poor speed response and
stability
• Poor speed precision
• Motor noise
• Control motor hunting and
oscillation occur at speeds
below 10 Hz.
• Poor motor torque at low speeds
• Poor speed response
• Motor instability at motor start.
<1> Default setting is determined by drive model.
Models BA0001 to BA0012, 2A0001 to 2A0020, and 4A0001 to 4A0011: Setting 1.00.
Models BA0018, 2A0030 to 2A0069, and 4A0018 to 4A0038: Setting 1.50.
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Table 6.2 Parameters for Tuning the Drive in OLV Motor Control Method
Parameter No.
• If motor torque and speed response are too slow,
AFR Gain
(n2-01)
• If motor hunting and oscillation occur, gradually
• To improve motor torque speed response,
• If motor hunting and oscillation occur as a result
AFR Time Constant 1
(n2-02)
Note: Ensure that n2-02 ≤ n2-03. When making
adjustments to n2-02, set C4-02 (Torque
Compensation Primary Delay Time Constant 1)
accordingly.
• If overvoltage trips occur, gradually increase this
• If response is slow, gradually reduce this setting
AFR Time Constant 2
(n2-03)
Note: Ensure that n2-02 ≤ n2-03. When making
adjustments to n2-03, increase the value of C4-06
(Torque Compensation Primary Delay Time 2)
proportionally.
• If overvoltage trips occur, gradually increase this
• If response is slow, gradually reduce this setting
Torque Compensation
Primary Delay Time
Note: Ensure that C4-02 ≤ C4-06. When changing
Constant 2 (C4-06)
C4-06 (Torque Compensation Primary Delay Time
Constant 2), increase the value of n2-03
proportionally.
• To improve motor torque speed response,
Torque Compensation
Primary Delay Time • If motor hunting and oscillation occur, gradually
Constant 1
(C4-02)
Note: Ensure that C4-02 ≤ C4-06. When making
adjustments to C4-02, increase n2-02 (AFR Time
Constant) proportionally.
• If response is slow, gradually decrease the setting
Slip Compensation
Primary Delay Time
• If speed is unstable, gradually increase the setting
Constant (C3-02)
• If speed is too slow, gradually increase the setting
Slip Compensation
Gain (C3-01)
• If speed is too fast, gradually decrease the setting
• If there is too much motor noise, the carrier
• If motor hunting and oscillation occur at low
Carrier Frequency
Selection (C6-02)
• The default setting for the carrier frequency
• If motor torque and speed response are too slow,
• If the motor exhibits excessive instability at start-
Mid Output Voltage A
(E1-08)
Note: The default value is for 200 V class units.
Minimum Output
Double this value when using a 400 V class drive.
Voltage (E1-10)
When working with a relatively light load,
increasing this value too much can create an
excessively high of a torque reference.
Corrective Action
gradually decrease the setting by 0.05.
increase the setting by 0.05.
gradually reduce this setting by 10 ms and check
the performance.
of load inertia, gradually increase the setting by
50 ms and check the performance.
setting by 50 ms.
by 10 ms.
setting by 10 ms and check the performance.
by 2 ms and check the performance.
gradually reduce this setting by 2 ms and check
the performance.
increase this setting by 10 ms.
by 10 ms.
by 10 ms.
by 0.1 ms.
by 0.1 ms.
frequency is too high.
speeds, reduce the carrier frequency.
depends on the drive capacity (o2-04) and Drive
Duty Selection (C6-01).
increase the setting.
up, reduce the setting.
6.2 Motor Performance Fine Tuning
Default
Value
<1>
50 ms
750 ms
150 ms
<2>
20 ms
<2>
200 ms
<2>
1.0
7 (Swing PWM
1)
E1-08: 12.0 V
<2>
E1-10: 2.5 V
<2>
Suggested
Setting
0.50 to 2.00
50 to 2000 ms
750 to 2000 ms
150 to 750 ms
20 to 100 ms
100 to 500 ms
0.5 to 1.5
6
0 to the default
setting
Initial ±2 V
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