Daily record of inverter and motor operating data, including inverter output frequency, output current, output voltage, inverter internal DC voltage, radiator temperature and other parameters, compared with reasonable data, in order to facilitate early detection of hidden faults. If the inverter trips in a fault, be sure to record the fault code and the operating condition of the inverter at the time of tripping so that the cause of the fault can be analyzed.
With the development of factory automation technology, inverters have increasingly become important drive and control devices. Therefore, ensuring the reliable operation of inverters has become an important issue for maintenance of equipment and reducing downtime. The key to ensuring reliable and continuous operation of the frequency converter is daily maintenance.
The specific content of daily maintenance can be divided into:
First, the operation data record, the fault record: Every day should record the frequency changer and the electrical machinery movement data, including the frequency changer output frequency, the output current, the output voltage, the frequency changer internal direct current voltage, the radiator temperature and other parameters, compared with the reasonable data comparison, To facilitate the early detection of hidden troubles. If the inverter trips in a fault, be sure to record the fault code and the operating condition of the inverter at the time of tripping so that the cause of the fault can be analyzed.
Second, the frequency converter daily inspection:
Once every two weeks, check and record the three-phase output voltage of the inverter during operation, and pay attention to the balance between them; check and record the three-phase output current of the inverter, and pay attention to compare the balance between them; check records Ambient temperature, radiator temperature; see if the inverter has abnormal vibration, sound, and whether the fan is operating normally.
Third, the frequency changer maintains: Each frequency changer must clean the gray maintenance once every quarter. Maintenance To remove dust and dirt from the inside of the frequency converter and the air duct, wipe the surface of the inverter clean; the surface of the inverter should be kept clean and bright; during the maintenance, the inverter must be carefully checked to see if there is any discoloration in the inverter. Parts, whether the cracking phenomenon of cement resistance, electrolytic capacitor with or without explosion and explosion proof holes, etc., whether the PCB board is abnormal, there is no fever and yellow burning parts. After the maintenance is over, it is necessary to restore the parameters and wiring of the inverter, and send the power, with the motor working at a low frequency of 3Hz for about 1 minute, to ensure that the inverter works normally.
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