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

Claim 0:
1. An AC/DC converter, comprising:
a plurality of internal terminals including positive, negative, and neutral internal terminals;
an input stage connected to the positive, negative, and neutral internal terminals and having at least three input terminals for connecting to a three-phase AC power source;
a switching stage having a plurality of modules connected in series between the positive internal terminal and the negative internal terminal, each module having two switches and a capacitor connected serially in a loop, at least one of the modules connected to the positive internal terminal, at least one of the modules connected to the negative internal terminal, and at least two of the modules connected to the neutral internal terminal;
an output stage connected to the positive internal terminal and configured to provide DC voltage to output terminals for connecting to a load; and
a controller having a plurality of control signal outputs connected to the plurality of switches and configured to generate control signals for said switches,
wherein the switch stage has (2N+2M) modules, where n and M are positive integers,
for each module the plurality of switches comprise two switches, and the two switches and the capacitor of each module are connected serially in a loop,
the module connected to the positive terminal is connected to the positive terminal by a node in the loop containing the two switches of said module,
the module connected to the negative terminal is connected to the negative terminal by a node in the loop containing the two switches of said module,
a first of the at least two modules connected to the neutral internal terminal is connected to the neutral internal terminal by a node in the loop connecting the two switches of said module, and
a second of the at least two modules connected to the neutral internal terminal is connected to the neutral internal terminal by a node in the loop connecting the two switches of said module.