YASKAWA U1000 Series Technical Manual page 327

Setting 2: Pulse injection
A pulse signal is injected into the motor in order to detect the rotor position.
■ n8-36: High Frequency Injection Level
There is normally no need to change this parameter from the default value.
Sets the frequency level used for High Frequency Injection. Enabled when n8-57 = 1.
No.
n8-36
■ n8-37: High Frequency Injection Amplitude
There is normally no need to change this parameter from the default value.
Sets the amplitude of high-frequency injection as a percentage of the voltage class standard (200 V Class: 200 V, 400 V
Class: 400 V). Enabled when n8-57 = 1.
No.
n8-37
n8-39: Low Pass Filter Cutoff Frequency for High Frequency Injection
■
There is normally no need to change this parameter from the default value.
Sets a cutoff frequency of a low pass filter for high frequency injection. Enabled when n8-57 = 1.
No.
n8-39 Low Pass Filter Cutoff Frequency for High Frequency Injection
n8-45: Speed Feedback Detection Control Gain (for PM Motors)
■
Sets the gain for internal speed feedback detection control. Although this setting rarely needs to be changed, adjustment
may be necessary under the following conditions:
• Increase this setting if motor oscillation or hunting occurs.
• Decrease this setting in increments of 0.05 to decrease drive responsiveness.
Note: This parameter is available in OLV/PM.
No.
n8-45
n8-47: Pull-In Current Compensation Time Constant (for PM Motors)
■
Sets the time constant for the actual current and the pull-in current to match one another.
Although this setting rarely needs to be changed, adjustment may be necessary under the following conditions:
• Increase this setting when it takes too long for the reference value of the pull-in current to match the target value.
• Decrease this setting if motor oscillation occurs.
Note: This parameter is available in OLV/PM.
No.
n8-47
n8-48: Pull-In Current (for PM Motors)
■
Sets the d-axis current during no-load operation at a constant speed. Set as a percentage of the motor rated current (for
PM Motors).
• Increase this setting when hunting occurs or the motor speed is unstable while running at a constant speed.
• If there is too much current when driving a light load at a constant speed, then reduce this value slightly.
Note: This parameter is available in OLV/PM.
No.
n8-48
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Name
High Frequency Injection Level
Name
High Frequency Injection Amplitude
Name
Name
Speed Feedback Detection Control Gain (for PM Motors)
Name
Pull-In Current Compensation Time Constant (for PM Motors)
Name
Pull-In Current (for PM Motors)
5.9 n: Special Adjustments
Setting Range Default
200 to 1000 Hz 500 Hz
Setting Range Default
0.0 to 50.0%
Setting Range Default
0 to 1000 Hz
Setting Range Default
0.00 to 10.00
Setting Range Default
0.0 to 100.0 s
Setting Range Default
20 to 200%
20.0%
50 Hz
0.80
5
5.0 s
30%
327