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5.2 b: Application
214
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
Note:
This default value changes if the motor rated capacity set to E2-11 is changed. The Energy Saving coefficient is set automatically
when Auto-Tuning for Energy Saving is performed (
Refer to Auto-Tuning on page 154
).
■
b8-05: Power Detection Filter Time (V/f, V/f w/PG)
The Energy Saving function continuously searches out the lowest output voltage in order to achieve minimum output
power. Parameter b8-05 determines how often the output power is measured in ms.
Reducing this setting will increase the response time. If the filter time is too short, the motor may become unstable with a
lighter load.
■
b8-06: Search Operation Voltage Limit (V/f, V/f w/PG)
Sets the voltage limit for the optimal output voltage detection of Speed Search as a percentage of the maximum output
voltage. During the search operation, the drive will keep the output voltage above this level to prevent motor stalling.
Note:
If set too low, the motor may stall with a sudden increase to the load. Disabled when b8-06 = 0. Setting this value to 0 does not
disable Energy Saving.
■
b8-16: Energy Saving Parameter (Ki) for PM Motors
Coefficient to adjust torque linearity.
There is normally no need to change this parameter from the default value.
When E5-01 (Motor Code Selection (for PM Motors)) is set to 1
or 2
, the automatically calculated value
will be set. This set value cannot be changed. If oscillation occurs when Energy Saving is enabled (b8-01 = 1), then check
the value displayed in monitor U5-21. If the value displayed differs from the Ki value written on the motor nameplate,
then set b8-16 accordingly.
■
b8-17: Energy Saving Parameter (Kt) for PM Motors
Coefficient to adjust torque linearity.
There is normally no need to change this parameter from the default value.
When E5-01 (Motor Code Selection (for PM Motors)) is set to 1
or 2
, the automatically calculated value
will be set. This set value cannot be changed. If oscillation occurs when Energy Saving is enabled (b8-01 = 1), then check
the value displayed in monitor U5-22. If the value displayed differs from the Kt value written on the motor nameplate,
then set b8-17 accordingly.
■
b8-27: q-Axis Current Compensation Method when Output Voltage is Limited
There is normally no need to change this parameter from the default value. Sets a compensation method for the q-axis
current when output voltage is limited.
Setting 0: Output Voltage Limit Priority
Setting 1: q-Axis Current Priority
No.
Name
Setting Range
Default
b8-05
Power Detection Filter Time
0 to 2000 ms
20 ms
No.
Name
Setting Range
Default
b8-06
Search Operation Voltage Limit
0 to 100%
0%
No.
Name
Setting Range
Default
b8-16
Energy Saving Parameter (Ki) for PM Motors
0.00 to 3.00
1.00
No.
Name
Setting Range
Default
b8-17
Energy Saving Parameter (Kt) for PM Motors
0.00 to 3.00
1.00
No.
Name
Setting Range
Default
b8-27
q-Axis Current Compensation Method when Output Voltage is Limited
0, 1
0
SIEP_C710636_02B_1_0.book 214 ページ 2015年11月25日 水曜日 午後4時56分