The Theoretical And Simulation Research Of The Power Factor Correction On High Power Capacitor Chargingn Power Supply

Lower power factor and power grids' pollution caused by the substantial harmonic in the rectifier devices that have attracted great attention around the world. Power Factor Correction technology is an effective way to the suppression of harmonic current and improve power factor. Thus it has attracted more and more attention in recent years. So far, for the following high-power 15kW power charge, some use of active power factor correction technology, but taking into the reliability and simple application, more higher-power rechargeable power supply use the passive power factor correction technology.This paper presents the purpose and significance of power factor correction in the high-power charging power supply, as well as its domestic and international research status, and does a simple introduction on the active power factor correction technology. Then combined with the operating characteristics of large-capacity capacitor charging power supply, analyzed the uncorrected power factor and harmonic of capacitor-filtered three-phase-bridge rectifier circuitsAnd then based on 'the past investigation of the power factor correction techniques, systematic analyzed the traditional front and rear-correction circuit design method, given the specific design methods and parameters, and the power factor could corrected up to 0.96;Also given the relationship between the passive power factor correction inductance and power factor and harmonic content, and establish the simulation measurement model of power factor at the same time in the MATLAB/SMULINK.Finally, combination the power parameters we have to design, completed the design of a suitable 30kW large-capacity capacitor charging power supply of the passive power factor correction circuit. Under the premise of the correct size inductor, power factor will be increased to 0.9. And a 5kW power for passive power factor correction and preliminary design of active power factor correction, ensure the inductance volume and temperature rise conditions, after the passive power factor correction , the power factor improved to more than 0.85. Finally, do simulation and experimental verification.