Patent ID: 9166491
Filing Date: 2015-10-20
Classification: H02M

Abstract:
1. A converter system, comprising: a first converter; a second converter electrically connected to the first converter in parallel between a first input side parallel terminal and a first output side parallel terminal; and a first inter-phase transformer disposed at the first input side parallel terminal or the first output side parallel terminal for limiting a circulating current generated by the first converter and the second converter; wherein the first and second converters each comprise an input side and an output side, the input sides of the first and second converters comprise a first bridge arm, a second bridge arm and a third bridge arm respectively, the output sides of the first and second converters comprise a first bridge arm, a second bridge arm and a third bridge arm respectively, and the first inter-phase transformer comprises a first inter-phase transformer unit, a second inter-phase transformer unit and a third inter-phase transformer unit, wherein: when the first inter-phase transformer is disposed at the first input side parallel terminal, the first, second and third bridge arms of the input side of the first converter are electrically connected to the first, second and third inter-phase transformer units of the first inter-phase transformer respectively, wherein the first, second and third bridge arms of the input side of the second converter are electrically connected to the first, second and third inter-phase transformer units of the first inter-phase transformer respectively; and when the first inter-phase transformer is disposed at the first output side parallel terminal, the first, second and third bridge arms of the output side of the first converter are electrically connected to the first, second and third inter-phase transformer units of the first inter-phase transformer respectively, wherein the first, second and third bridge arms of the output side of the second converter are electrically connected to the first, second and third inter-phase transformer units of the first inter-phase transformer respectively.