The Design And Implementation Of Digital Emergency Control EPS Emergency Power Supply Based On DSP

With the development of the society,people pay more and more attention to the fire safety of public areas and their own property.In order to deal with the Power failure in an Emergency,EPS(Emergency Power Supply)is derived from the UPS Power Supply imported from abroad,and is widely used in the fields of fire fighting and Emergency lighting.At present,most EPS on the market are the inversion circuits using one topology structure and the charging circuits using another topology structure.Although this structure will make the design relatively simple,the number of components used will increase,thus increasing the production cost of products and making the product volume become huge.Based on this,this article designs an EPS emergency power supply with shared power main topology,which can realize the same power topology structure between the inversion circuit and the charging circuit,and realize the interchange of the inversion and charging functions by switching the working mode through the master control chip.The main work of this project is to design and study a fully digital control EPS emergency power supply based on TMS320F28335 as the core controller.In view of the fact that the service time of EPS battery is far from the expected service life when it is delivered,the failure causes of the battery are analyzed.The vulcanization principle of battery failure is discussed.The common battery repair methods such as chemical repair,large current charging,resonance technology and pulse repair technology are introduced.Combined with the application scenario of the project,the positive and negative pulse repair algorithm combined is put forward,and the design of the pulse repair algorithm is mainly calculated,and the pulse repair circuit is built according to the theoretical derivation,and the pulse repair parameters are designed according to the actual conditions of the project.Then,cut all the system into different modules,and give the solution of each module.This article mainly studied the inversion system and the charging system,analyzed the working principle of the inversion circuit,set up the mathematical model of it,and proposed the closed-loop control scheme by using the small signal modeling and analysis.Secondly,I have designed the hardware circuit of the system,including:inversion power topology,voltage and current signal acquisition unit,charging power topology,IGBT drive unit,etc.The parameter selection method of the relevant main components is introduced,and the hardware architecture of the system is built.Finally,according to the characteristics of the lead-acid battery selected and the needs of the actual application scenario of the project,this article applies three charging methods of trickle charging,constant charging and floating charging to different voltage charging stages,and designs a four-stage charging method to achieve the purpose of safe and rational use of the battery.In this article,an experimental prototype of emergency power supply with full digital control EPS based on DSP was developed,and its functions and indexes were tested.From the test results,the machine generally meets the requirements of various indicators,basically meeting the actual use.