Digitalized double-excitation uninterrupted switching power supply

Abstract

The invention discloses a digitalized double-excitation uninterrupted switching power supply. The power supply comprises a main transformer provided with a primary coil and a secondary coil, also comprises a main loop, a synchronous rectification output loop, a synchronous DC converter and a digital control unit; the main loop comprises a high voltage switching network, a resonant inductor, the primary coil and a resonant capacitor; the synchronous rectification output loop comprises a current-double rectifier and filter circuits connected to the two output ends of the current-double rectifier, and the current-double rectifier is constructed by connecting two synchronous rectifier tubes and the secondary coil in parallel, and the synchronous rectifier tubes are connected in series oppositely; the synchronous DC converter comprises two low voltage switching tubes, an isolation diode and a low voltage DC source; the digital control unit automatically selects either the main loop or the synchronous DC conversion circuit according to the voltage change of a high voltage DC bus, and stable DC output is supplied.

Description

technical field [0001] The invention relates to a voltage conversion device, in particular to a digital double-excitation uninterrupted switching power supply. Background technique [0002] Under the general trend of energy saving and emission reduction, the efficiency of voltage conversion devices is also constantly improving. There are many line topologies. In the application field represented by the IT industry, there is a huge market demand for power-off parts. However, these requirements are still occupied by traditional "atypical series" power-off protection devices (such as UPS and chargers). Users and the market turn a blind eye to the fact that the function utilization rate of "atypical series" UPS is lower than the probability of AC power failure, which actually causes great waste without knowing it. Its typical application form is the IDC computer room, which often uses hundreds of KVA UPS redundant power supply protection systems. The construction cost ranges...

AI Technical Summary

Problems solved by technology

[0003] At present, digital equipment such as computers, security monitoring systems, etc. often also need to choose a dual-input voltage conversion device to maintain uninterrupted operation of the equipment and avoid data loss caused by power outages.

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