AC-DC Power Converter

• US 20090073730A1
• Filed: 11/17/2008
• Published: 03/19/2009
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies Wireless IP Singapore Pte Limited (Broadcom, Inc.)
• Inventors: Larson, John D. III
• Granted Patent: US 7,852,644 B2
• Time in Patent Office: Days
• 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

1-20. -20. (canceled)

21. 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.

22. The method of claim 21, additionally comprising:

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;

and converting the non-electrical power coupled through the electrical isolator to DC electrical power.

23. The method of claim 22, in which:

the DC electrical power has a DC voltage; and

the method additionally comprises 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.