How does the overload protection function of the power inverter work

As an important part of power conversion equipment, power inverter is mainly used to convert DC power into AC power. It is widely used in solar power generation systems, automobiles and other occasions that require AC power. However, during use, it faces the risk of overload, which may cause equipment damage, fire or even safety accidents. Therefore, overload protection is particularly important as one of the key safety functions of power inverter.

The core of the overload protection function is to monitor the output load current. Once it exceeds the rated power range of the inverter, the protection function will be automatically triggered to cut off the output circuit to protect the safety of the equipment.

The implementation of overload protection is mainly through the following steps:

1. Overload detection: The power inverter monitors the output load current through a built-in current sensor or current detection circuit. Under normal circumstances, the output current should be within the rated power range of the inverter. Once it exceeds the rated power range, the inverter will be judged as an overload state.

2. Overload protection trigger: Once the overload state is detected, the inverter will immediately trigger the overload protection function. Usually an overload protection threshold is set, and the protection function is triggered when the threshold is exceeded.

3. Output circuit cut-off: The overload protection function will quickly cut off the output circuit and prevent the overload current from continuing to flow to the load end, thereby avoiding equipment damage and fire and ensuring user safety.

4. Overload recovery: Once the overload protection function is triggered, the inverter will enter the protection state until the overload condition is relieved. After the load returns to normal, the inverter will automatically restore the output circuit and continue to work normally.

5. Alarm prompt: When the overload protection is triggered, some power inverters will remind the user that the device is in an overload state through sound or light prompts, prompting the user to deal with it in time.