Patent ID: 8737097
Filing Date: 2014-05-27
Classification: H02M

Abstract:
1. An AC/DC converter system comprising: an input circuit for connection to a three phase AC source; an autotransformer coupled to the input circuit for developing first and second phase shifted AC supplies; a first AC/DC converter having a first rectifier connected to the first phase shifted AC supply converting AC power to DC power across a first DC bus having a first DC bus capacitor; a second AC/DC converter having a second rectifier connected to the second phase shifted AC supply converting AC power to DC power across a second DC bus having a second DC bus capacitor; and a first and second set of switches connected between the respective first and second DC busses and a main DC bus having a main DC bus capacitor, wherein the first and second sets of switches are controlled so that only one of the first and the second DC busses is connected to the main DC bus to charge the main DC bus capacitor.