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Title: Multi-phase AC/AC step-down converter for distribution systems

A step-down AC/AC converter for use in an electric distribution system includes at least one chopper circuit for each one of a plurality of phases of the AC power, each chopper circuit including a four-quadrant switch coupled in series between primary and secondary sides of the chopper circuit and a current-bidirectional two-quadrant switch coupled between the secondary side of the chopper circuit and a common node. Each current-bidirectional two-quadrant switch is oriented in the same direction, with respect to the secondary side of the corresponding chopper circuit and the common node. The converter further includes a control circuit configured to pulse-width-modulate control inputs of the switches, to convert a first multiphase AC voltage at the primary sides of the chopper circuits to a second multiphase AC voltage at the secondary sides of the chopper circuits, the second multiphase AC voltage being lower in voltage than the first multiphase AC voltage.
Inventors:
;
Issue Date:
OSTI Identifier:
1404705
Assignee:
ABB Schweiz AG ARPA-E
Patent Number(s):
9,800,167
Application Number:
14/175,461
Contract Number:
AR0000141
Resource Relation:
Patent File Date: 2014 Feb 07
Research Org:
ABB Schweiz AG, Baden, CH (Switzerland)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION

Other works cited in this record:

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patent, October 1978

AC Variable voltage source utilizing pulse width modulation
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patent, October 1982

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journal, November 2011
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