User Manual of A90 Series Inverter The code parameters F05.01 to F05.06 are valid when the multi-point polyline VF is selected (F05.00=1). and the percentage of output voltage, linearized in sections within different input ranges. All V/F curves are dependent on the curve set by the percentage of input frequency 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 ＜ V2 ＜ V3, F1 ＜ F2 ＜ F3; If the slope of the V/F curve is too large, an “overcurrent” fault may occur. 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. Output voltage (%) Rated voltage of motor V3 V2 V1 Output frequency F1 F2 F3 Rated frequency of motor (%) Fig. 7-19 Schematic Diagram of Multi-point Polyline V/F Curve 170 Function Parameter Default Function code Unit Attribute code name description setting F05.07 Voltage source of VF separation mode 0:
digital setting of VF separation voltage 1: AI1 2: AI2 3-4: retention 0 ○