5.9 n: Special Adjustments310 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical ManualSetting 1: High Frequency InjectionHigh frequency is injected in order to detect the rotor position. Some noise may be generated from the motor at start.Setting 2: Pulse injectionA pulse signal is injected into the motor in order to detect the rotor position. n8-36: High Frequency Injection LevelThere 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.Note: This parameter is not available in models CIMR-A4A0930 and 4A1200. n8-37: High Frequency Injection AmplitudeThere is normally no need to change this parameter from the default value.Sets the amplitude for High Frequency Injection as a percentage of the voltage when the voltage class base is 100%(200 V class is 200 V, 400 V class is 400 V). Enabled when n8-57 = 1.Note: This parameter is not available in models CIMR-A4A0930 and 4A1200. n8-39: Low Pass Filter Cutoff Frequency for High Frequency InjectionThere 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.Note: This parameter is not available in models CIMR-A4A0930 and 4A1200. 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, adjustmentmay 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. 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. Name Setting Range Defaultn8-36 High Frequency Injection Level 200 to 1000 Hz 500 HzNo. Name Setting Range Defaultn8-37 High Frequency Injection Amplitude 0.0 to 50.0% 20.0%No. Name Setting Range Defaultn8-39 Low Pass Filter Cutoff Frequency for High Frequency Injection 0 to 1000 Hz 50 HzNo. Name Setting Range Defaultn8-45 Speed Feedback Detection Control Gain (for PM Motors) 0.00 to 10.00 0.80No. Name Setting Range Defaultn8-47 Pull-In Current Compensation Time Constant (for PM Motors) 0.0 to 100.0 s 5.0 s
