Dalan oil pump motor tells you how to judge the fault of the inverter motor

The failure of the inverter motor is mainly manifested in the following seven aspects, the Dalan oil pump motor to tell you.
The failure of the inverter motor is mainly manifested in the following seven aspects, the Dalan oil pump motor to tell you.

1, the rectifier module is damaged

1 Usually caused by grid voltage or internal short circuit.

2 Replace the rectifier bridge with the internal short circuit removed.

3 When dealing with faults on site, it is important to check the user's power grid conditions, such as grid voltage, and whether there are equipment such as welding machines that are polluting the power grid.

2, the inverter module is damaged

1 Usually caused by motor or cable damage and drive circuit failure.

2 After repairing the drive circuit, replace the module with the drive waveform in good condition.

3 After replacing the engine board in the field service, pay attention to check the motor and connecting cables.

4 The inverter can be operated without any faults.

3, no display after power-on

This is usually caused by damage to the switching power supply or damage to the soft charging circuit, so that the DC circuit is not DC-powered. If the starting resistor is damaged, the operation panel is damaged.

4, display over voltage or under voltage

1 Usually due to input phase loss, circuit aging and board damage caused by moisture.

2 The solution is to find out its voltage detection circuit and detection point, and replace the damaged device.

5, showing over current or ground short

Usually due to damage to the current sensing circuit. Such as Hall elements, op amp circuits, and so on.


6, the power supply and the driver board start to show over current

Usually caused by damage to the drive circuit or inverter module.

7. The no-load output voltage is normal, and the overload or over current is displayed after loading.


Usually caused by improper parameter settings or aging of the drive circuit.








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