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E6581179 ② TOSVERT VF-A7/P7 Instruction Manual for Parameters f480 and f481 Thank you for purchasing the Toshiba industrial inverter "TOSVERT VF-A7/P7". This manual describes the functions of the f480 and f481 parameters for the inverter TOSVERT VF- A7/P7. Minimum Communication...
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E6581179 ② 3. Reference excitation current characteristic f481 =0,2 f481 =1,3 f480 Reference excitation Reference excitation α × current [multiple] current [multiple] 1+0.5×α f480 Operation Operation frequency frequency Base Base [Hz] [Hz] 3Hz(fixed) 3Hz(fixed) frequency frequency (vl) (vl) *3 : α is a coefficient between 0 and 1. It is 1 at 3Hz, while it is 0 at the frequency at point *4 shown above. *4 : The operation frequency at this point varies depending on the vl setting and the motor characteristics.