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Bidirectional 3-level converter for use in energy storage system for welding generator

A technology of level converter and energy storage device, which is applied in the direction of output power conversion device, welding equipment, battery circuit device, etc., and can solve problems such as DC power bus imbalance

Active Publication Date: 2020-09-15
ILLINOIS TOOL WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, without a balancing mechanism, the DC power bus can become unbalanced when providing auxiliary power

Method used

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  • Bidirectional 3-level converter for use in energy storage system for welding generator
  • Bidirectional 3-level converter for use in energy storage system for welding generator
  • Bidirectional 3-level converter for use in energy storage system for welding generator

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Embodiment Construction

[0011] The present disclosure relates generally to welding systems and, more particularly, to systems and methods for converting power between a DC power bus that supplies power to an energy storage unit via a bidirectional 3-level converter. to welding type output and auxiliary output. The bi-directional 3-level converter can be configured to balance the DC power bus.

[0012] An example of a welding type power system is disclosed. The disclosed welding-type power system includes a power source that includes a DC power bus. The power source may be engine powered, and the DC power bus fed directly by, for example, a rectifier or a boost converter. Engine-powered welding systems may be used to turn a generator for powering multiple welding-type tools (eg, welding-type torches, wire feeders, plasma torches, etc.) and may be used for extended periods of time. In some examples, the DC power bus has discrete capacitors, allowing the user to connect plug-in devices (eg, lights, s...

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PUM

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Abstract

A welding-type power system than includes a power supply, a DC power bus, an energy storage device, and a bi-directional converter. The bi-directional converter configured to connect the DC power busto the energy storage device, and further configured to convert power from the DC power bus to the energy storage device to charge the energy storage device, and to convert power from the energy storage device to the DC power bus in response to a power demand on the DC power bus. The bi-directional converter further configured to balance the DC power bus. A controller is configured to control theduty cycle of the bi-directional converter in order to balance the DC power bus, and control the flow of power between the energy storage device and the DC power bus.

Description

[0001] priority statement [0002] This application claims priority to the following applications, each of which is incorporated herein by reference: [0003] 62 / 623,660 entitled "BIDIRECTIONAL 3-LEVEL CONVERTER FOR USE IN ENERGY STORAGE SYSTEM FORWELDING GENERATOR," filed January 30, 2018 U.S. Provisional Patent Application No. Background technique [0004] Conventional welding-type power systems provide power to welding-type tools. Some such power systems are coupled to power supplies and energy storage devices. In some systems, the DC power bus provides welding-type power to welding-type tools and auxiliary outputs. These configurations may require multiple converters to convert power between the DC power bus and the energy storage unit. Furthermore, without a balancing mechanism, the DC power bus can become unbalanced when providing auxiliary power. Contents of the invention [0005] An apparatus, system, and method of a welding-type power system including a bi-dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
CPCB23K9/1043B23K9/1062H02J3/28B23K9/0953H02J7/34H02J3/32H02M3/33584H02M7/487H02M7/4833
Inventor 詹姆斯·弗兰克·乌尔里奇
Owner ILLINOIS TOOL WORKS INC