YASKAWA A1000 HHP Programming Manual

Contents

2.2 Motor Performance Fine-TuningThis section offers helpful information for counteracting oscillation, hunting, and other problems that occur while performinga trial run. Refer to the section below that corresponds to the motor control method used.Note: This section describes commonly edited parameters that may be set incorrectly. Consult Yaskawa for more information on detailed settingsand for fine-tuning the drive.u Fine-Tuning V/f Control and V/f Control with PGTable 2.1 Parameters for Fine-Tuning Performance in V/f and V/f w/PGProblem Parameter No. Corrective Action Default SuggestedSettingMotor hunting andoscillation at speedsbetween 10 and 40 HzHunting Prevention Gain(n1-02)• Reduce the setting if insufficient motor torque relative to the sizeof the load causes hunting.• Increase the setting when motor hunting and oscillation occurwith a light load.• Reduce the setting if hunting occurs when using a motor with arelatively low inductance, such as a high-frequency motor or amotor with a larger frame size.1.00 0.10 to 2.00• Poor torque or speedresponse• Motor hunting andoscillationTorque CompensationPrimary Delay Time(C4-02)• Reduce the setting if motor torque and speed response are tooslow.• Increase the setting if motor hunting and oscillation occur.200 ms 100 to 1000 ms• Poor motor torque atspeeds below 10 Hz• Motor hunting andoscillationTorque CompensationGain (C4-01)• Increase the setting if motor torque is insufficient at speedsbelow 10 Hz.• Reduce the setting if motor hunting and oscillation with arelatively light load.1.00 0.50 to 1.50• Poor motor torque atlow speeds• Motor instability atmotor startMid Output Voltage A(E1-08)Minimum OutputVoltage (E1-10)• Increase the setting if motor torque is insufficient at speedsbelow 10 Hz.• Reduce the setting If motor instability occurs at motor start.Depends ono2-04, DriveModelSelectionDefault setting±5 VPoor speed precision(V/f control) Slip Compensation Gain(C3-01)Set the motor-rated current (E2-01), motor-rated slip (E2-02), andmotor no-load current (E2-03), then adjust the slip compensationgain (C3-01).0.0(no slipcompen-sation)0.5 to 1.5Poor speed precision(V/f control with PG)ASR Proportional Gain 1(C5-01)ASR Integral Time 1(C5-02)<1> <2>Adjust the ASR proportional gain 1 (C5-01) and the ASR integraltime 1 (C5-02). C5-01: 0.20C5-02: 0.200Proportionalgain =0.10 to 1.00Integral time =0.100 to 2.000<1> ASR in V/f Control with PG only controls the output frequency, and does not allow the same high gain settings as CLV control.<2> Refer to C5: Automatic Speed Regulator (ASR) on page 53 for details on ASR.u Fine-Tuning Open Loop Vector ControlTable 2.2 Parameters for Fine-Tuning Performance in OLVProblem Parameter No. Corrective Action Default SuggestedSetting• Poor motor torqueand speed response• Motor hunting andoscillation at speedsbetween 10 and 40 HzAFR Gain(n2-01)• Gradually reduce the setting in 0.05 increments if motor torqueand speed response are too slow.• Gradually increase the setting in 0.05 increments if motor huntingand oscillation occur.1.00 0.50 to 2.00• Poor motor torqueand speed response• Motor hunting andoscillation at speedsbetween 10 and 40 HzAFR Time Constant 1(n2-02)• Gradually reduce the setting in 10 ms increments and check theperformance to improve motor torque speed response.• Gradually increase the setting by 50 ms increments and check theperformance if motor hunting and oscillation occur as a result ofload inertia.Note: Ensure that n2-02 ≤ n2-03. When changing n2-02, setC4-02 (Torque Compensation Primary Delay TimeConstant 1) accordingly.50 ms 50 to 2000 ms2.2 Motor Performance Fine-Tuning176 YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual