High power density capacitor charging power supply

To meet the miniaturization requirement, a high-voltage capacitor charging power supply(CCPS) has been developed, which is capable of charging the load capacitor at 20 kJ/s at 10 kV output voltage (40 kW peak power output at 10 kV rated output voltage). This power supply adopts series resonant, soft-switching technology and thermal design technology and its switching frequency is 50 kHz. The effect of distributed parameters on its operating characteristic was analyzed, and solutions were introduced according to different distributed parameters. The thermal design technology of high power density CCPS at interval working condition was experimentally studied. On the basis of the interval operating and thermal characteristics of sub-units in the CCPS, cooling measures were designed and experimental results of temperature rise were provided. The performance test of the CCPS has been carried out, and it demonstrates that, with above designs the power density of the CCPS reaches 2.15 MW/m3.