AC-DC power converter

• US 7,852,644 B2
• Filed: 11/17/2008
• Issued: 12/14/2010
• Est. Priority Date: 10/31/2005
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Larson, John D. III
• Primary Examiner(s): Laxton; Gary L
• Application Number:
  US12/272,742
• Publication Number:
  US 20090073730A1
• Time in Patent Office: 757 Days
• Field of Search: 363/65, 363/67, 363/68, 363/69, 363/70, 363/125, 363/126, 363/1, 363/2, 363/3, 363/4
• US Class Current: 363/69
• CPC Class Codes: H02M 7/08 arranged for operation in parallel
• CPC Class Codes: H02M 7/103 Containing passive elements (capacitively coupled) which are ordered in cascade on one source
• CPC Class Codes: H10N 30/40 with electrical input and electrical output, e.g. functioning as transformers

Abstract

An AC-DC power converter is composed of AC input, a first rectifying circuit, a second rectifying circuit, a DC-DC converter and a DC output. The DC-DC converter has a DC input. The first rectifying circuit and the second rectifying circuit are connected in parallel between the AC input and the DC input of the DC-DC converter. At least one of the rectifying circuits comprises a phase shifting element that provides a phase shift at the AC line frequency.

Claims

1. An AC-DC power conversion method, comprising:

performing a first rectification of AC power to provide first raw DC power;

performing a second rectification of AC power to provide second raw DC power differing in phase from the first raw DC power; and

superposing the first raw DC power and the second raw DC power;

providing an electrical isolator;

converting the superposed first raw DC power and the second raw DC power to non-electrical power;

coupling the non-electrical power through the electrical isolator;

converting the non-electrical power coupled through the electrical isolator to DC electrical power having a DC voltage; and

performing the converting the superposed first raw DC power and the second raw DC power to non-electrical power in a manner that maintains the DC voltage constant.