NE200/300 Series Drive User Manual
130 Chapter 6 Parameter description
This is to set the synchronous motor’s carrier frequency at low speed.
When the motor is running at low speed, the lower carrier frequency will
help to reduce the motor rotation pulsation, but it will come with some noise
from changing carrier frequency. When this parameter setting is higher than
preset carrier frequency (F0.15), this parameter will become invalid.
F3.42 Synchronous motor Min
excitation current
Range：-100～100.0%【8.0%】
Set the Min. excitation current of synchronous motor.
F3.43
②
V/F Start switching
Frequency
Range：0～50.00Hz【0】
When the operating frequency is lower than F3.43, the converter runs
constant current VF, and the current value is subject to F3.40. When the
running frequency is higher than F3.43, the converter runs vector. This
parameter is only available for NE200, but not for NE300
F3.44 Synchronous motor position
evaluating low speed filter
Range：2～100【40】
F3.45 Synchronous motor position
evaluating high speed filter
Range：2～100【15】
The above 2 parameters are to set the motor’s position evaluating
filtering coefficient. Normally take the default value.
6.5 V/F Control Parameters (F4)
F4.00 V/F curve setting Range: 0～4【0】
0: Linear V/F. It is suitable for common constant torque load.
1~3: Multi-power decreasing torque. It is suitable for the centrifugal loads
such as fan and pump, as shown Fig.6-8.
4: Multiple-points V/F. It can be defined by setting F4.01~F4.06
parameters. as shown Fig.6-9
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