Patent ID: 11923767
Assignee: DELTA ELECTRONICS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 16:
17. An AC/DC converter, comprising:
input terminals for connecting to a three-phase input voltage source;
an input filter stage coupled to the input terminals and connected to a positive node, a negative node and a neutral node;
a first switching stage having n half bridge modules (n being a positive integer greater than 1) connected in series between the positive and negative nodes, and having the neutral node connected to a series connection between an i-th and (i+1)-th half bridge modules in said series (where 1≤i≤n−1);
a second switching stage having m half bridge modules (m being a positive integer greater than 1) connected in series between the positive and negative node;
an output stage connected to the neutral node and to a series connection node between a j-th and (j+1)-th series connected half bridge modules of the second stage (where 1≤j≤n 1), the output stage further having output terminals for connecting to a load; and
a controller configured to generate control signals on control signal outputs electrically connected to the half bridge modules of the first and second switching stages,
wherein each half bridge module of the first and second switching stages comprises a capacitor and two switches connected in series in a loop,
wherein the half bridge modules have 2w half bridge modules, the m half bridge modules have 2x half bridge modules, where w and x are positive integers,
for each half bridge module the plurality of switches comprises two switches, and the two switches and the capacitor of each half bridge module are connected serially in a loop,
the half bridge module connected to the positive node is connected to the positive node by a node in the loop containing the two switches of said half bridge module,
the half bridge module connected to the negative node is connected to the negative node by a node in the loop containing the two switches of said half bridge module,
a first of the at least two half bridge modules connected to the neutral node is connected to the neutral node by a node in the loop connecting the two switches of said half bridge module, and
a second of the at least two half bridge modules connected to the neutral node is connected to the neutral node by a node in the loop connecting the two switches of said half bridge module.