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In V/F mode, please adjust P04.09 = 0, P08.41 = 00; check under-voltage point of factory parameter.
In vector mode, please adjust P03.04 = 2.5, P08.41 = 00. check under-voltage point of factory parameter.

In V/F mode, please adjust P04.09 = 0, P08.41 = 00;
In vector mode, please adjust P03.04 = 2.5, P08.41 = 00.

First check proportional, then integral, and finally add differential
The curve oscillates frequently, and the scale dial should be enlarged
The curve floats around the big bay, and the scale dial pulls to the small
The curve deviates and recovers slowly, and the integration time decreases
The curve has a long fluctuation period and the integration time is longer
The oscillation frequency of the curve is fast. First reduce the differential
It fluctuates slowly when the dynamic difference is large, the differential time should be longer.

When the VFD is not used, the leakage current is generally small. When using the VFD, because the power module of the inverter switches at high speed, there are high-order harmonics in the output current. Because of the inductance between the cable and the ground and between the cables, a large leakage current (up to 10 times when the VFD is not used) is generated.

When the motor is started, the starting current corresponding to the capacity will flow, and the transformer on the stator side of the motor will produce a voltage drop. When the motor capacity is large, the voltage drop will also have a great impact. The VFD connected to the same transformer will make a judgment of undervoltage or instantaneous stop, so sometimes the protection function acts, resulting in stop.

Ordinary motor can realize variable frequency speed regulation. However, it is not recommended to use it under low frequency (below 30Hz) for a long time to avoid the rise of motor temperature.

If the voltage is reduced completely in proportion when the frequency decreases, the ground torque at low speed tends to decrease because the AC impedance becomes smaller and the DC resistance remains unchanged. Therefore, given V / F at low frequency, the output voltage should be increased to obtain a certain starting torque. This compensation is called enhanced starting.

3% to 4%

The electrolytic capacitor needs to be replaced after 30,000-40,000 hours of use.