Patent ID: 9042142
Filing Date: 2015-05-26
Classification: G05F,H02M

Abstract:
1. A voltage source converter, comprising: a multi-level voltage source converter that outputs multiple levels of a first voltage at one of two first output terminals through a multiple of first conducting paths; a first energy store; and a first switching element, directly connected with the one of the two first output terminals, that switches the first energy store in or out of the multiple of the first conducting paths so as to combine a level of a voltage of the first energy store with a level of the first voltage as a second voltage output at a second output terminal; wherein the multi-level voltage source converter comprises: a second energy store; a third energy store connected with the second energy store in series; a first, a second, a third and a fourth power semiconductor connected in series, wherein the first power semiconductor is connected to the second energy store, the fourth power semiconductor is connected to the third energy store, a junction point between the second and the third energy stores is connected to a junction point between the second and the third power semiconductors; a fifth power semiconductor connected between a junction point between the first and second power semiconductors and one of the first output terminals and in series with the first power semiconductor; a sixth power semiconductor connected between a junction point between the third and fourth power semiconductors and the other of the first output terminals and in series with the fourth power semiconductor; and wherein each of the first, the second, the third, the fourth, the fifth and the sixth power semiconductor is a drivable unidirectional power semiconductor switch with an anti-paralleled uncontrolled unidirectional current-carrying semiconductor.