YASKAWA CIPR-GA50C series Technical Manual page 724

12.10 n: Special Adjustment
• If the motor does not run smoothly, gradually increase the setting from 0.
• If the motor stalls during run at constant speed, gradually increase the setting from 0.
• If there is vibration or hunting, decrease the setting.
Note:
• If the value is set too low, the drive will detect STPo [Motor Step-Out Detected].
• If you use one motor or more than motor at low inertia and the value is too high, there can be vibration in the motor.
0 : Below 1:10
Use this setting in these conditions:
• The ratio between the motor inertia and machine inertia is less than 1:10
• There are large current ripples
1 : Between 1:10 and 1:30
Use this setting in these conditions:
• The ratio between the motor inertia and machine inertia is approximately 1:10 to 1:30
• Parameter n8-55 = 0 and the drive detects STPo because of an impact load or sudden acceleration/deceleration.
2 : Between 1:30 and 1:50
Use this setting in these conditions:
• The ratio between the motor inertia and machine inertia is approximately 1:30 to 1:50
• Parameter n8-55 = 1 and the drive detects STPo because of an impact load or sudden acceleration/deceleration.
3 : Beyond 1:50
Adjust in the following situations.
• The ratio between the motor inertia and machine inertia is more than 1:50
• Parameter n8-55 = 2 and the drive detects STPo because of an impact load or sudden acceleration/deceleration.
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n8-57: HFI Overlap Selection
No.
Name
(Hex.)
n8-57 HFI Overlap Selection
(0574)
Note:
• When you set n8-57 = 1, doHigh Frequency Injection Auto-Tuning.
• When there is high frequency injection, the motor will make an excitation sound.
• When you use Zero Speed Control, set E1-09 [Minimum Output Frequency] = 0.0.
0 : Disabled
Use this setting with SPM motors. The speed control range is approximately 1:20.
When n8-57 = 0, you cannot set E1-09 [Minimum Output Frequency] ≤ 1/20 of the value of E1-06 [Base
Frequency].
1 : Enabled
The speed control range changes to 1:100 to give sufficient speed detection at low speeds.
Note:
It is not available with an SPM motor.
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n8-62: Output Voltage Limit Level
No.
Name
(Hex.)
n8-62 Output Voltage Limit Level
(057D)
Expert
Set this parameter lower than the input power supply voltage.
724
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the function that detects motor speed with high frequency injection.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the output voltage limit to prevent saturation of the output voltage. Usually it is not necessary
to change this parameter.
Description
Description
YASKAWA SIEPC71061753A GA500 Technical Manual
Default
(Range)
0
(0, 1)
Default
(Range)
200 V Class: 200.0 V, 400
V: 400.0 V
(200 V Class: 0.0 to 230.0
V, 400 V Class: 0.0 to 460.0
V)