YASKAWA Varispeed F7 Instruction Manual

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Contents

Acceleration and Deceleration Characteristics6- 31Time ChartThe following figure shows the frequency characteristics when L3-01 is set to 1.Fig 6.25 Time Chart for Stall Prevention During AccelerationSetting Precautions• If the motor capacity is small compared to the Inverter capacity, or if the motor is operated using the fac-tory settings, resulting in the motor stalling, lower the set value of L3-02.• If using the motor in the constant output range, L3-02 will be automatically lowered to prevent stalling.L3-03 is the limit value to prevent the stall prevention level in the constant output range from beingreduced more than necessary.• Set the constants as a percent taking the Inverter rated voltage to be 100%.Fig 6.26 Stall Prevention Level and Limit During AccelerationOutput currentStall level duringaccelerationTimeTimeOutput frequencyOutput frequency is controlledto prevent the motor stalling.Stall prevention level duringaccelerationL3-02 (Stall Prevention Level during Accelera-tion)L3-02 x L3-03 (Stall Prevention Limit during Ac-celeration)Output frequencyE1-06Base Frequency (FA)