Parameter Description MD280/MD280N User Manual
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2) If the voltage is set too high at the time of low frequency, it may
cause overheating and even burning of the motor as well as stall over
current or over current protection of the inverter.
Frequency Hz
Voltage %
Points 1 to 3 Voltage Proportion of Multi-point V/F
Points 1 to 3 Frequency Point of Multi-point V/F
Rated Motor Frequency
Frequency Hz
Voltage %
Points 1 to 3 Voltage Proportion of Multi-point V/F
Points 1 to 3 Frequency Point of Multi-point V/F
Rated Motor Frequency
Fig6- 3 Schematic Diagram for Multi-point V/F Curve
Slip compensation coefficient
Factory
default
value
0.0%
F1-13
Setup value 0.0% to 200.0%
The V/F control slip caused by the load can be compensated by setting this
parameter, so that the motor rotary speed will decrease following the
decrease of the load change for V/F control. In general, 100% corresponds
to the rated slip of the motor with rated load.
The slip coefficient adjustment may be performed referring to the following
principle: When the load is rated load, and the slip compensation
coefficient is set to 100%, the rotary speed of the motor is close to the
reference speed.
Over excitation gain
Factory
default value
64
F1-14
Setup range 0 to 200
The role of over excitation gain function is to suppress the rise of bus
voltage during the inverter deceleration, thus avoiding occurrence of over
voltage fault due to bus voltage exceeding over voltage protection limitation
value. The higher the over excitation gain is, more powerfully the
suppression effect is. The setting is described as follows:
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