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A capacitor-charging power supply using a series-resonant topology, constant on-time/variable frequency control, and zero-current switching

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2 Author(s)
A. C. Lippincott ; Hewlett-Packard Corp., Colorado Springs, CO, USA ; R. M. Nelms

A power supply specifically designed for capacitor-charging applications that uses a series-resonant circuit topology, a constant on-time/variable frequency control scheme, and zero-current switching techniques has been developed. The performance of this capacitor-charging power supply (CCPS) has been evaluated in the laboratory by charging several values of load capacitance at various repetition rates. The CCPS has charged a 1 μF capacitor from 0 to 1500 V DC in 750 μs, exhibiting a charging power of 1500 J/s. This operation has been repeated at a rate of 800 charges per second, which corresponds to an average power output of 900 W. A 10 μF capacitor has been charged from 0-1500 V DC in 8 ms. These results indicate that this design is feasible for use in capacitor-charging applications

Published in:

IEEE Transactions on Industrial Electronics  (Volume:38 ,  Issue: 6 )