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Research On Series Resonant Soft-switching Capacitor Charging Power Supply

Posted on:2010-02-17Degree:MasterType:Thesis
Country:ChinaCandidate:X L ZhangFull Text:PDF
GTID:2132330338985065Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
With the development of science and technology, the range of pulsed power application gets increasingly wide, expanding from the initial military and scientific research field to the medical, biological, industrial, civil and other fields. Because the high-voltage capacitor is one of the main energy storage equipments in primary stage of the pulsed power system, high-performance high-voltage capacitor charging power supply are more urgently required, along with the development of pulsed power technology.As the series resonant circuit, which uses high switching frequency and soft-switching technology, has many advantages, such as less switching losses, the characteristics of constant current source, strong anti-short-circuit capability, high reliability and easy to control, etc, it has been widely used for high-voltage capacitor charging power supply topology. On the one hand, increasing the switching frequency reduces the volume of high-frequency transformer, on the other hand, it increases the influence of the distributed parameters, making the main circuit no longer work in an ideal series-resonant mode, which results in that the performance of the capacitor charging power supply is widely different from the expected one.To solve this problem, the transformer distribution parameters must be considered in the design process. In the past, this can be done usually by simulation or searching curves and the design results are often unsatisfactory.Through the study of the transformer's distributed parameters, we know that the series resonant circuit actually works in the series-parallel model due to the influence of the distribution parameters. Based on theoretical analysis of the series resonant circuit, this paper analyzes series-parallel model and gets the precise mathematical expressions of all the parameters needed for a design .And also it designs a capacitor charging power supply according to the theoretical analysis. Simulation and test results are consistent with theoretical calculations, which shows the theory can effectively guide our practice.
Keywords/Search Tags:Capacitor charging, series resonant, high frequency transformer, LCC resonant
PDF Full Text Request
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