Multi layer protection design of sine wave inverter

With the rapid development of energy storage power supply market, sine wave inverter is widely used in outdoor activities, mobile office, field camping, medical rescue, vehicle tool power supply, etc., to meet various power shortage needs.

Sine wave inverter needs these protection designs to be safer

The short-circuit protection function refers to the protection that can ensure the power supply to be cut off quickly and reliably after the short-circuit fault occurs in the electrical circuit, so as to avoid the damage caused by the impact of short-circuit current on the electrical equipment.

The over-current protection function means that the equipment is a current protection module. When the current exceeds the set current, the device will automatically power off to protect the device. For example, USB interface of CPU on motherboard generally has USB over-current protection to protect motherboard from being burnt out.

The over power protection function, when the load in the power supply over-voltage, or after the load has short-circuit over-current and other super actual power fault occurs, the overload protection circuit in the circuit cuts off the main power supply through the feedback circuit action to protect the circuit and load. So that the fault does not expand.

Undervoltage protection function when the line voltage is reduced to the critical voltage, the action of protective appliances is called undervoltage protection. Its main task is to prevent the equipment from burning due to overload.

The over temperature protection function means that when the temperature exceeds the turnover threshold, the potential at the negative end of the comparator will drop to lower than the potential VREF2 at the positive end, and the comparator will output a high level, so as to turn off the power switch device and avoid the chip being burned.

2、 Overcharge protection function. When not in use, we also need to charge the car emergency starting power supply. When the power supply is fully charged and the circuit has not been cut off, the power supply will automatically start the overcharge protection function and no longer charge. It can protect the battery and prolong the service life of the product.