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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12728735 B1

PDFFull Text
Date of Patent:
Sep. 08, 2026

Filed:

Sep. 27, 2024

Ac/dc substation configurable between charging and powering modes

Applicant:

Caterpillar Inc., Peoria, IL (US);

Inventors:

Igor Strashny, Tucson, AZ (US);

Zeljko Jankovic, Mequon, WI (US);

Bharadwaj Kaka, Bengaluru, IN;

Qing Ye, Katy, TX (US);

Assignee:

Caterpillar Inc., Peoria, IL (US);

Attorney:

Lee & Hayes, PLLC

Primary Examiner:

Fred E Finch, III

Int. Cl.
CPC ...
B60L 50/53 (2019.01); B60L 9/04 (2006.01); B60L 50/60 (2019.01); B60L 53/10 (2019.01); H02J 1/04 (2006.01); H02J 1/082 (2026.01); H02J 4/25 (2026.01); H02J 7/02 (2016.01); H02M 1/00 (2007.01); H02M 7/155 (2006.01); B60L 53/30 (2019.01); H02J 7/00 (2006.01); H02J 105/10 (2026.01); H02M 7/162 (2006.01); H02M 7/17 (2006.01); H02M 7/19 (2006.01);
U.S. Cl.
CPC ...
B60L 50/53 (2019.02); B60L 9/04 (2013.01); B60L 50/60 (2019.02); B60L 53/11 (2019.02); H02J 1/04 (2013.01); H02J 1/082 (2020.01); H02J 4/25 (2026.01); H02J 7/02 (2013.01); H02M 1/0077 (2021.05); H02M 1/0083 (2021.05); B60L 53/30 (2019.02); B60L 2200/36 (2013.01); B60L 2200/40 (2013.01); B60L 2210/10 (2013.01); B60L 2210/30 (2013.01); H02J 7/865 (2026.01); H02J 2105/10 (2026.01); H02M 7/1552 (2013.01); H02M 7/162 (2013.01); H02M 7/17 (2013.01); H02M 7/19 (2013.01);
Abstract

An electrical substation that transforms AC voltage to DC voltage is configurable between a current-source mode for charging batteries of a stationary work machine and a voltage-source mode for powering motors of a moving work machine. The substation receives medium-voltage AC power from a grid and includes a pair of DC power converters each formed from three-phase transformers and a single stage of silicon-controlled rectifier units. Adjustable connectors enable combining the power converters in parallel or keeping them separate to operate in the current-source mode for charging the machine batteries with up to 4800 ADC at 6 MW or for providing up to 1500 VDC in powering voltage. The connectors further enable combining the power converters in series to operate in the voltage-source mode for powering the machine motors with up to 3000 VDC at 6 MW. Sized to fit within a standard high-cube ISO shipping container with minimal components, the portable substation provides versatility with high power density and low cost per kilowatt.

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