Common Faults and Countermeasures for Frequency Converter Maintenance Download

Common inverter faults and maintenance:

1. No display, this kind of situation is relatively common, generally the normal state of the external three-phase power supply, the inverter switching power supply has burned out. You can measure the 24 volt supply at the inverter terminal output board. , you can easily replace it, if not, find a professional repair company to help you fix it.

2. The three-phase output is unbalanced. If the imbalance is greater than plus or minus 15%, it should not be used. You can measure the voltage through the voltage range of the multimeter Whether it is balanced or not, use the clamp meter to measure the current conditionally.

In case of unbalanced three-phase output, it is necessary to disconnect the connection line between the inverter and the motor and simply check the three-phase motor with a multimeter Orthe resistance value of the resistors between them is close, if there is a problem with the motor, the motor must be repaired. If the motor is normal, this situation is generally that the IGBT is broken, and the drive circuit is also generally defective.

3. The speed is unstable, try to avoid the inverter running at low frequency. In general, the inverter should be set above 8HZ. If the high frequency is still unstable, you can lower the V/F ratio. If it is in vector control mode, the motor parameters may change and cause parameter mismatch after long time use. You can re-do the parameter matching between the drive and motor and then save it.

4. The sound of the motor is too loud and the temperature of the motor is high. You can increase the carrier frequency correctly. At this time, the output waveform of the inverterwill be more ideal. If the inverter interferes with other equipment during operation, the carrier frequency can be reduced accordingly.

5. The newly installed inverter cannot start working. key to set the frequency, so if you use the inverter external terminal control, of course, it can not be used directly. You can find the frequency source and the given signal source in the parameters, and set it to the corresponding external control mode.

6. The inverter has been used for a long time and the current is too large. You can check the fan at the outlet of the inverter to see if it has a lot of dust, etc. There is a lot of dirty things on the fan blades or in the main circuit of the inverter Now remove them, clean them completely and blow them several times with dry compressed air, which can usually solve the problem.

Prev: The fully automatic medicine packing machine can be customized upon request