Q2 Q2A, Technical Manual

Page: 822 / 866

12.9 n: SPECIAL
822 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
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n8-49 Heavy Load Id Current
No.
(Hex.)
Name Description
Default
(Range)
n8-49
(053C)
Expert
Heavy Load Id Current
Sets the d-axis current to that the drive will supply to the motor to run it at a constant speed with a
heavy load. This parameter is a percentage where
E5-03 [PM Mot Rated Current (FLA)] = 100% .
Usually it is not necessary to change this setting.
Determined by E5-01
(-200.0 - 0.0%)
When you use an IPM motor, you can use the reluctance torque of the motor to make the motor more efficient and
help conserve energy.
When you operate an SPN motor, set this parameter to 0.
Adjust this parameter in these conditions:
•
If the load is large and motor rotation is not stable, decrease the setting value.
•
If you change the parameters E5: PM MOTOR SETTINGS , set n8-49 = 0 , then adjust this parameter.
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n8-51 Ac/Dec Pull-In Current
No.
(Hex.)
Name Description
Default
(Range)
n8-51
(053E)
Ac/Dec Pull-In Current
Sets the pull-in current that can flow during acceleration/deceleration as a percentage where E5-
03 [PM Mot Rated Current (FLA)] = 100%.
Determined by A1-02
(0 - 200%)
Adjust this parameter in these conditions:
• When the motor does not smoothly because of large loads, increase the setting value in 5% increments.
• If too much current flows during acceleration, decrease the setting value.
Note:
When A1-02 = 8 [Control Method = EZ Vector] , this parameter will always be in effect for speed ranges less than n7-10 [Pull-in
SwitchSpeed] .
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n8-54 Volt-Err Compensation Time
No.
(Hex.)
Name Description
Default
(Range)
n8-54
(056D)
Expert
Volt-Err Compensation
Time
Sets the time constant that the drive uses when adjusting for voltage errors.
1.00 s
(0.00 - 10.00 s)
Adjust this parameter in these conditions:
• If oscillation occurs at the time of start up, increase the setting value.
• If hunting occurs when operating at low speed, increase the setting value.
• If fast changes in the load cause hunting, increase the setting value in 0.1-unit increments. If you cannot stop
hunting, set
n8-51 [Ac/Dec Pull-In Current] to 0% and set n8-54 to 0.00 s, and disable compensation for voltage
errors.
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n8-55 Load Inertia
No.
(Hex.)
Name Description
Default
(Range)
n8-55
(056E)
Load Inertia
Sets the ratio between motor inertia and machine inertia.
1
(1 - 4)
Adjust this parameter in the these conditions:
• If torque and speed response is unsatisfactory, gradually increase the setting.
• If motors do not start smoothly, gradually increase the setting.
• If the motor stalls during run at constant speed, gradually increase the setting.
• If there is vibration or hunting, decrease the setting.
Note:
•
If the value 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.
1 : <1:10
Use this setting in these conditions:
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV