What is the working principle of EPS fire emergency power supply DC to AC? Ask for a high finger to

The working principle of EPS is like this, when the mains is normal, the bypass of EPS, that is, the mains power supplies power to the load, and when the mains power is off or the voltage is unstable, it will switch to the battery inverter power supply. At present, the EPS products of mainstream manufacturers in the industry are divided into normal switching and fast switching, with normal switching (100-200) ms and fast switching (3-5) ms. DC transformer AC is mainly when the mains power is off, the direct current of the battery is supplied to the load through the inverter inverter.

This is because the bypass, that is, the mains port, has a mains detection device and a transfer switch are linked, and the inverter starts the DC-AC to supply power to the load. This DC current is the electricity of the battery, and the DC voltage is related to the number of batteries, and the number of batteries and the DC mother voltage are determined according to the power of the load. If you have any specific questions, please contact me.

EPS power supply is also a type of uninterruptible power supply, which is similar to UPS power supply, but there are differences. When the EPS power supply has the mains power to work normally, the mains power goes in and out, and the inverter does not work, and only when the mains power is out of power, the battery will invert to work to ensure that the output is normal.

Differences between EPS and UPS.

Both have mains bypass and inverter circuits, and their functional differences are:

EPS only has the function of continuous power supply, generally does not have high requirements for the inverter switching time (the application of special occasions has certain requirements), can have multiple outputs and has the function of monitoring and detection for each output and a single battery, and focuses on bypass power supply in daily life, and only switches to inverter power supply when the mains power fails, and the power utilization rate is high.

The UPS (** type) only has a total output, generally emphasizing its three major functions: (a) voltage and frequency stabilization (b) uninterrupted power supply with extremely high requirements for switching time (c) purification of mains, daily emphasis on rectifier inverter double conversion circuit power supply, inverter failure or overload before switching to bypass power supply, power utilization rate is not high (generally 80%-90%).

However, in Europe and the United States, where power grids and power supply are relatively perfect, in order to save energy, some UPS use sites have been replaced by EPS with extremely short inverter switching time (less than 10 milliseconds).

So professional. No, no. It is recommended that you go to some large companies to have a look, there will be a lot of technical articles on it, which may help you. Zhongzuan Kechuang Electronics, it's not bad, you can go to them to have a look.

EPS is a kind of backup emergency working mode of power supply, when the mains power grid is normal, the mains power is directly output to supply power, and the battery is in a floating charge state, when the input grid is abnormal, it is converted to battery inverter emergency power supply.

1) Total output linkage design method;

2) Inverter output linkage design mode;

3) The linkage design method of cold start, but there is only one purpose, that is, to achieve the purpose of controlling the EPS emergency output operation through the linkage console in the fire control room in an emergency.