1, whether the power supply voltage is normal, too high or too low will cause shutdown.

2. Whether the parameter setting is correct, it is normal that in some occasions, such as constant pressure water supply, it will automatically stop after reaching the target pressure, and then restart when it is less than the target pressure.

3. Whether there are a large number of harmonics in the power supply requires a power quality analyzer or a hand-held oscilloscope to detect.

4, inverter hardware failure. Such as hardware failures such as contactors, and so on.

The motor driven by the extended data converter is out of order. You should know the frequency conversion drive:

In VVC, when the motor load changes, the control circuit uses mathematical model to calculate the optimal motor excitation and compensate the load.

In addition, the synchronous 60 PWM method integrated in ASIC circuit determines the optimal switching time of inverter semiconductor devices (IGBTS).

The switching time should be determined according to the following principles: the phase with the largest value keeps its positive or negative potential 1/6 period unchanged (60).

The other two phases change in proportion to keep the output line voltage sinusoidal and reach the required amplitude. Unlike sine-controlled PWM, VVC works according to the digital quantity of required output voltage. This can ensure that the output of the inverter reaches the rated voltage, the motor current is sine wave, and the operation of the motor is the same as that when the motor is directly connected to the mains.

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