VD300 Series Inverter User Manual
Parameter Description
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Fig 6.5-2 Schematic diagram for MS V/F curve
P04.08
V/F Slip Compensation
Gain of Motor 1
0.0%~200.0%
0.0%
○
Slip compensation gain: used in V/F control mode compensation when loading changes caused
motor RPM changes, to improve motor mechanic feature hardness.
The parameter is used in calculating slip frequency, set value 100% stand for rate torque current
corresponding with rate slip frequency, so reasonable slip compensation gain system can precisely
adjust speed control offset. The parameter set principle: when motor with heavy loading and speed
getting lower, it needs to increase the coefficient, otherwise to reduce the parameter.
P04.09
V/F Torque Boost
0.0%: Automatic torque boost
0.1%~10.0%
0.0%
○
P04.10
Cutoff Frequency of
Torque Boost
0.0%~50.0%
(Relative to rated motor 1 frequency)
20.0%
◎
When motor is run under V/F control mode, in order to make up motor stator resistance voltage loss, it
needs to compensate certain voltage value, can be set by P04.09, referring to below diagram.
Compensation 100.0% is equal to motor rate voltage, generally could not exceeding 10.0%.
The heavy the load, the bigger the boosting, but if the set value is too big can result in burning the
motor.
Manual torque boost parameter is effective with linear V/F, parabola V/F, MS V/F.
Fig 6.5-3 Schematic diagram for torque boost
Summary of Contents for VD300 Series
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