Patent ID: 7649753

Claim:
A high-voltage AC-DC or AC-AC converter converting alternating input current into high-voltage direct (DC) or alternating (AC) current to be provided to a load, said converter comprising: a first unit configured to convert the alternating (AC) input current into high frequency alternating (AC) current, a second unit configured to convert the alternating (AC) input current into high frequency alternating (AC) current, at least one transformer connected to the first unit and the second unit, the at least one transformer being configured to adapt the high frequency alternating (AC) current to requirements of the load, and including a primary winding and a secondary winding, a series loaded resonant tank coupled between the first and second units and the transformer such that the first and second units are coupled into the series loaded resonant tank, wherein the resonant tank includes at least one capacitor having a first end commonly connected to the first and second units, and a second end connected to the primary winding of the transformer, wherein the at least one capacitor is configured to determine the resonance frequencies of the coupling of the first and second units into the transformer.