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A capacitor charging power supply utilizing a Ward converter

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2 Author(s)
Nelms, R.M. ; Dept. of Electr. Eng., Auburn Univ., AL, USA ; Schatz, J.E.

A prototype capacitor-charging power supply (CCPS) that utilizes a Ward converter is presented. This converter is a member of the family of resonant converters and is capable of zero-current switching. It is applicable to capacitor charging because of its inherent short-circuit protection and its insensitivity to the value of the load capacitance. The converter is controlled using a constant on-time constant frequency scheme that allows the utilization of zero-current switching techniques. The prototype CCPS is capable of charging various values of load capacitors up to 1000 V DC. Waveforms that show single- and repetitive-charge operation of the CCPS are presented

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Industrial Electronics, IEEE Transactions on  (Volume:39 ,  Issue: 5 )