Sinee EM500 - Multi-Dot Polyline V;F Curve

EM500 Open-Loop Vector Control Inverter User Manual
217
A user-defined V/F curve is determined by the curve set with the input frequency
percentage and output voltage percentage, and it is linearized at different segments in
different input ranges.
Motor rated frequency is the ultimate frequency reached by the V/F curve and also
the frequency at maximum voltage output. The input frequency percentage: if motor rated
frequency is the input frequency, the percentage is 100.0%; output voltage percentage: if
motor rated voltage is output voltage (U
e
), the percentage is 100.0%.
The
relationship between the three voltage points and the frequency point
must meet the following requirements: V1<V2<V3, F1<F2<F3.
An excessive slope of the V/F curve may result in an “overcurrent” fault.
Especially, an excessively high voltage at low frequency may cause motor to be
overheated or burn motor and inverter may get in overcurrent stall or overcurrent
protection.
Figure 7-20 Multi-Dot Polyline V/F Curve
No.
Function
Range
Unit
Default
Type
F05.07
Voltage Source of VF
Separation Mode
0: Numeric Setting of VF
Separation Voltage
1: AI1
2: AI2
3: AI3
4: High-Frequency Pulse
(X7)
5: PID
6: Communication
Percentage Setting
Note: Motor Rated Voltage
is 100%
0
〇
F05.08
Numeric Setting of
0.0 - 100.0 (100.0=Motor
%
0.0
●