User Manual of EM730/EM730E Series Inverter V/F=2*X* (rated voltage of the motor)/(rated frequency of the motor) The code parameters F05.01 to F05.06 are valid when the multi-point polyline VF is selected (F05.00=1). All V/F curves are dependent on the curve set by the percentage of input frequency and the percentage of output voltage, linearized in sections within different input ranges. The rated frequency of the motor is the final frequency of the V/F curve, and also the frequency corresponding to the highest output voltage. Percentage of the input frequency: rated frequency of the motor = 100.0%; percentage of the output voltage: rated voltage U e of the motor = 100.0%.
The relationships of the three voltage points and frequency points must meet the following requirements: V1 If the slope of the V/F curve is too large, the “overcurrent” protection may be enabled. Particularly, if the low-frequency voltage is too high, the motor may be overheated and even burnt, and the inverter may be subject to overcurrent stall or overcurrent protection.
187 Function Function code Default Parameter description Unit Attribute code name setting F05.01 Frequency point F1 of multi-point VF 0.00 - F05.03 Hz 0.50 ● F05.02 Voltage point V1 of multi-point VF 0.0～100.0 (100.0 = Rated voltage) % 1.0 ● F05.03 Frequency point F2 of multi-point VF F05.01～F05.05 Hz 2.00 ● F05.04 Voltage point V2 of multi-point VF 0.0-100.0 % 4.0 ● F05.05 Frequency point F3 of multi-point VF F05.03 to rated frequency of motor (reference frequency) Hz 5.00 ● F05.06 Voltage point V3 of multi-point VF 0.0-100.0 % 10.0 ●