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Method and Apparatus For Providing Welding Type Power Using Double Forward Converter

A forward converter and forward conversion technology, which is applied in welding equipment, conversion equipment with intermediate conversion to AC, arc welding equipment, etc., can solve problems such as overshoot or undershoot, increased current ripple, and inconsistent behavior

Pending Publication Date: 2021-02-09
ILLINOIS TOOL WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This control may result in increased current ripple, overshoot or undershoot, or inconsistent behavior when operating at low current and low voltage

Method used

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  • Method and Apparatus For Providing Welding Type Power Using Double Forward Converter
  • Method and Apparatus For Providing Welding Type Power Using Double Forward Converter
  • Method and Apparatus For Providing Welding Type Power Using Double Forward Converter

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Embodiment Construction

[0047] Although the present disclosure will be described with reference to particular topologies and particular control schemes for generating welding-type output, it should be understood at the outset that other circuitry and other control schemes may be used with welding-type power supplies and methods for generating welding-type power. to implement.

[0048] The present invention is best understood by reference to the prior art. The power circuitry used herein may be the power circuitry found in prior art patent US 8,952,293 and prior art US patent publication US 2018-0304393. The prior art describes how the circuitry operates in PSDF mode of operation. In general, the present invention provides a pulse width modulated dual forward converter with three modes of operation, also referred to as three phase relationships. The present invention provides a PSDF mode of operation (or variable phase shift mode) and two additional modes: in-phase locked mode (LIP) and fixed phase ...

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PUM

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Abstract

A method and apparatus for providing welding type power includes receiving input power and pulse width modulating a first forward converter and a second forward converter so that they operate as a pulse width modulated double forward converter to provide a welding type output. A phase relationship between the first forward converter and a second forward converter is selected from at least two available phase relationships using a controller. The controller includes a pwm module, and the pwm module includes a phase relationship module. The at least two available phase relationships are at leasttwo of variable phase shifting, fixed phase staggering and locked in phase. The selected phase relationship is maintained over a predetermined range of outputs.

Description

technical field [0001] The present disclosure generally relates to the field of welding-type power supplies. More specifically, the present invention relates to welding-type power supplies having two forward converters. Background technique [0002] This disclosure is an improvement over the welding-type power supplies shown in US Patent 8,952,293, US Patent 8,455,794, and US Patent Publication US2018-0304393, each of which is incorporated herein by reference and will Used as the basis for the background and description of the PSDF (Phase Shifted Double Forward Converter) in welding type applications. This improvement can also be applied to PSDFs used in battery chargers, as described in US Patent 8,179,100, which is also incorporated herein by reference. As used herein, a welding-type power supply refers to a power supply that can provide welding-type power. As used herein, welding-type power refers to power suitable for welding, plasma cutting, induction heating, and / or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/335
CPCH02M3/285H02M1/0067H02M3/33573B23K9/1075B23K9/091B23K9/1012
Inventor 伯纳德·J·沃格尔
Owner ILLINOIS TOOL WORKS INC