Suppliers of frequency converter energy feedback devices remind you that in daily production, industrial control equipment motors are often damaged due to improper operation, which not only results in financial losses but also has a significant impact on production progress. The correct use of frequency converters can have a positive effect on protecting motors.
1. The protection of the inverter for itself:
Instantaneous overcurrent, overvoltage, undervoltage, overload, short circuit to ground, and abnormal control circuit are all protected by the inverter itself. Limits are set for overcurrent, overvoltage, undervoltage, etc. When the inverter is running, if it exceeds the limit, even for a short period of time, it will play a protective role. Its protective function is to stop the output, which means that the output terminal of the inverter has no voltage. This is the protective function of the inverter. Its protective function is relatively sensitive and very sensitive. In order to protect the inverter circuit and rectifier circuit inside the inverter, it is very sensitive, which can easily cause frequent tripping. As we all know, frequent tripping is important for our production. It's very bad, so we must take some measures to protect the inverter itself, Being able to avoid tripping in a certain situation is what we will discuss below.
2. Protection of electric motors:
The main protection for electric motors is electronic thermal protection. The biggest problem with our electric motors is heat generation. Once the motor heats up, it is easy to burn out its insulation layer, causing a short circuit in its winding and resulting in a short circuit in the entire current. Therefore, the main protection for electric motors is electronic thermal protection. So, let's introduce electronic thermal protection in detail.
3. Protection of the system:
The protection of this system is related to the protection of the inverter itself, which is very sensitive. A slight overcurrent or overvoltage can cause what we call a trip. In response to this situation, we have adopted stall prevention, automatic restart, and parameter protection functions, all of which are protective functions for the system. This stall prevention and automatic restart is aimed at situations where the frequency converter is very sensitive, so that in some cases, although it exceeds its limit value, it can not trip, or in the event of a power outage, it can restart without causing the entire production line to stop. This is the protection of the frequency converter itself. There is also a parameter protection function: the main function of the frequency converter is achieved through parameter setting and port voltage circuit. Therefore, once we have set the parameters, how to prevent them from being tampered with or lost by others is also the protection of the entire system.