PatentsDB

Power supply system for a polyphase arc furnace with an indirect converter between a mains connection and a furnace transformer

US8933378B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8933378-B2
Application numberUS-200913121736-A
CountryUS
Kind codeB2
Filing dateSep 8, 2009
Priority dateSep 30, 2008
Publication dateJan 13, 2015
Grant dateJan 13, 2015

How to read this patent

A practical reading order for non-experts. Skip the full description unless you need deep technical detail.

  1. Title

    What the patent document calls the invention.

  2. Abstract

    A short plain-language summary of the technical disclosure.

  3. Assignees and inventors

    Who owns or filed the patent and who is credited as inventor.

  4. Key dates

    Filing, priority, publication, and grant dates set the timeline.

  5. First independent claim

    The legal scope of protection — read this for what is actually claimed.

  6. CPC / IPC classifications

    Technology tags used to group this patent with similar filings.

  7. Citations and related patents

    Prior art links and similar publications in this corpus.

Abstract

Official abstract text for this publication.

In a power supply system for a three-phase arc furnace ( 1 ), comprising at least one furnace transformer ( 4 ), the furnace transformer ( 4 ) is connected on the secondary side to the three-phase arc furnace ( 1 ). On the primary side, the furnace transformer ( 4 ) is connected to a three-phase supply mains ( 3 ) through an indirect converter ( 5 ). The indirect converter ( 5 ) comprises at least one rectifier ( 6 ) on the mains side, at least one inverter ( 7 ) on the transformer side, and an intermediate circuit ( 8 ) between the rectifier ( 6 ) and the inverter ( 7 ). Each phase of the three-phase supply mains ( 3 ) is connected to the intermediate circuit ( 8 ) through two converter elements ( 11 ) of the rectifier ( 6 ) in each case. Each primary-side phase of the furnace transformer ( 4 ) is connected to the intermediate circuit ( 8 ) through two converter elements ( 2 ) of the inverter ( 7 ) in each case.

First claim

Opening claim text (preview).

The invention claimed is: 1. A power supply system for a polyphase arc furnace, comprising: at least one furnace transformer whose primary is connected via an indirect converter to a polyphase mains system and whose secondary is connected to the polyphase arc furnace, wherein the indirect converter has at least one rectifier on the mains side, at least one inverter on the transformer side, and a link circuit between the rectifier and the inverter, wherein each phase of the pol…

Assignees

Inventors

Classifications

Patent family

Related publications grouped by family.

View patent family 41213156

External sources

Next steps

Free tools are coming soon. Tell us what you want to track and we'll notify you.

Get alerts for this patentView on Google Patents

Request deeper analysis

Frequently asked questions

Answers are generated from the same data shown on this page.

What does patent US8933378B2 cover?
In a power supply system for a three-phase arc furnace ( 1 ), comprising at least one furnace transformer ( 4 ), the furnace transformer ( 4 ) is connected on the secondary side to the three-phase arc furnace ( 1 ). On the primary side, the furnace transformer ( 4 ) is connected to a three-phase supply mains ( 3 ) through an indirect converter ( 5 ). The indirect converter ( 5 ) comprises at le…
Who is the assignee on this patent?
Hörger Wolfgang, Meusel Wolfgang, Siemens Ag
What technology area does this patent fall under?
Primary CPC classification H05B7/005. Mapped technology areas include Electricity.
When was this patent published?
Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).