YASKAWA U1000 Series Technical Manual page 329

Setting 3: Beyond 1:50
The inertia ratio between the motor and the load is higher than 1:50. Set n8-55 to 3 if an STo fault occurs as a result of
impact load or sudden acceleration/deceleration when n8-55 = 2.
n8-57: High Frequency Injection
■
Detects motor speed by injecting a high frequency into the motor.
Note: This parameter is available in AOLV/PM.
No.
n8-57
Setting 0: Disabled
Disable n8-57 with SPM motors. The speed control range will be limited to approximately 1:20.
Setting 1: Enabled
Enabling n8-57 with IPM motors allows precise speed detection in a speed control range of approximately 1:100.
Note: 1. Be aware that using this function will generate some audible noise in the motor up to a certain speed.
2. Set E1-09 to 0.0 when using zero speed control.
n8-62: Output Voltage Limit (for PM Motors)
■
Sets the output voltage limit to prevent voltage saturation. This parameter rarely requires adjustment. Never set this value
higher than the actual input voltage.
Note: This parameter is available in OLV/PM, AOLV/PM, or CLV/PM.
No.
n8-62
<1>
<1> Values shown here are for 200 V class drives. Double values when using a 400 V class drive.
■ n8-63: Output Voltage Limit Proportional Gain (for PM Motors)
There is normally no need to change this parameter from the default value.
Stabilizes constant output.
Note: 1. This parameter is available in OLV/PM, AOLV/PM, or CLV/PM.
2. This parameter is available in the drive software versions S1017 and later.
No.
n8-63
■ n8-64: Output Voltage Limit Integral Time (for PM Motors)
There is normally no need to change this parameter from the default value.
Note: 1. This parameter is available in OLV/PM, AOLV/PM, or CLV/PM.
2. This parameter is available in the drive software versions S1017 and later.
No.
n8-64
n8-66: Output Voltage Limit Output Filter Time Constant (for PM Motors)
■
There is normally no need to change this parameter from the default value.
Note: 1. This parameter is available in OLV/PM, AOLV/PM, or CLV/PM.
2. This parameter is available in the drive software versions S1017 and later.
No.
n8-66 Output Voltage Limit Output Filter Time Constant (for PM Motors)
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Name
High Frequency Injection
Name
Output Voltage Limit (for PM Motors)
Name
Output Voltage Limit Proportional Gain (for PM Motors)
Name
Output Voltage Limit Integral Time (for PM Motors)
Name
5.9 n: Special Adjustments
Setting Range Default
0 or 1
Setting Range Default
0.0 to 250.0 Vac 200 Vac
Setting Range Default
0.00 to 100.00
Setting Range Default
0.000 to 5.000 s
Setting Range Default
0.000 to 5.000 s
0
1.00
5
0.040 s
0.001 s
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