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

Claim 7:
8. 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 switching stage having n half bridge modules, where n is a positive integer greater than 1, the half bridge modules connected in series between the positive and negative node, and having the neutral node connected to a series connection between the j-th and (j+1)-th half bridge modules in the series (where 1≤j≤n−1), wherein each half bridge module comprises a capacitor and two switches connected in series, and wherein the capacitor and the two switches are connected to form a loop;
an output stage connected to the positive node and configured to provide DC voltage to 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,
wherein the half bridge modules have (2w+2x) modules, where w and x are positive integers,
for each half bridge module the plurality of switches comprise 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.