Linsheng company introduced that the emergency power supply adopts single inverter technology, which integrates charger, battery, inverter, and controller. The battery detection and shunt detection loops are designed in the system, and the backup operation mode is adopted.

1. When the mains power is normal, the mains power is supplied to the important load through the mutual input device, and the mains detection and battery charging management are performed at the same time, and then the battery pack provides DC energy to the inverter. Here, the charger is an It only needs to provide a low-power DC power supply with a charging current equivalent to 10% of the battery capacity (Ah) to the battery pack. It does not have the ability to directly provide DC power to the inverter. At this time, the city power passes through the AC side of the EPS The power supply system composed of the circuit and transfer switch supplies power to the user’s various emergency loads. At the same time, under the control of the EPS logic control board, the inverter stops working and is in an automatic shutdown state. Under this condition, the user load is actually The power source used is the city power from the grid. Therefore, the EPS emergency power source is usually said to be always working in a sleep state, which can effectively achieve the effect of energy-saving.

2. When the mains power supply is interrupted or the mains voltage exceeds the limit (±15% or ±20% of the rated input voltage), the mutual input device will immediately switch to the inverter for power supply, and the DC energy provided by the battery pack supports At this time, the power used by the user load is the AC power converted by the EPS inverter, not from the mains.

3. When the mains voltage returns to normal operation, the EPS control center sends a signal to automatically shut down the inverter, and at the same time, it also performs the switching operation from the inverter power supply to the AC bypass power supply through its transfer switch. After that, While EPS provides commercial power to the load through the AC bypass power supply path, it also charges the battery pack through the charger.

Through the above introduction, Spotlight Company hopes that you can simply refer to the content of this article in future use.