1. On the premise of satisfying the production equipment and process requirements, the acceleration or deceleration time should be increased as much as possible, and then the overcurrent generation in the process of acceleration or deceleration can be avoided.
2. Check whether the inverter, motor, and production equipment are well matched, whether the transmission part is sensitive, and whether the material is stuck.
3. Whether the inverter itself is defective. Whether the three-phase voltage balance meets the requirements, if not, check whether the driving waveform of the inverter is normal. In other inverters, such as Danfoss products, the current detection link is faulty, and overcurrent will also appear. However, some brands of inverters, even if there is a problem with the current detection link, do not show overcurrent, which should be paid attention to in use. If there is a problem with the inverter main circuit device of the inverter, it will also present an overcurrent phenomenon.
4. When the output cable of the inverter is lengthened, the high-frequency loss is increased, so that the output of the inverter is not good, and the following two methods should be used to deal with this problem.
(1) Make some modifications to the parameters of the inverter. In the case of agreeing conditions, the output carrier frequency of the inverter can be modified, the output frequency can be reduced, and the high-frequency loss can be reduced. In addition, the output torque can be increased to reduce the effect of high-frequency losses.
(2) An AC reactor can be added at the output end of the inverter to suppress the sudden change of current and prevent overcurrent. For the selection of reactors, you can contact the inverter manufacturer to select the reactor with the power. Others can also be consulted for the relevant materials to design by themselves.
In short, there are many reasons for the overcurrent of the inverter, which should be analyzed and dealt with according to the specific situation. If the inverter often generates overcurrent, and it is confirmed that it is caused by overload, a higher-grade inverter can be used to overcome the overcurrent caused by overload.
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