logo

For the Inventor, By the Inventor

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 9300242 B1

PDFFull Text
Date of Patent:
Mar. 29, 2016

Filed:

Dec. 26, 2012

Nonvolatile thermal memory method and apparatus for electronic overload relay

Applicant:

Schneider Electric Usa, Inc., Palatine, IL (US);

Inventors:

Kevin M. Jefferies, Raleigh, NC (US);

Milton Hotard, Knightdale, NC (US);

Assignee:

SCHNEIDER ELECTRIC USA, INC., Schaumburg, IL (US);

Attorney:

Locke Lord LLP

Primary Examiner:

John H Le

Int. Cl.
CPC ...
H02H 7/09 (2006.01); G01K 1/08 (2006.01); H02P 29/00 (2006.01); H02P 29/02 (2006.01); H02H 6/00 (2006.01); H02H 7/08 (2006.01);
U.S. Cl.
CPC ...
H02P 29/0044 (2013.01); H02H 6/005 (2013.01); H02P 29/02 (2013.01); H02H 7/08 (2013.01);
Abstract

An electronic overload relay includes a microcontroller having an internal random-access memory (RAM) in which a motor thermal model is stored. The microcontroller is coupled to a power supply having a bulk storage capacitor. In response to a trip or stop condition of a protected motor, the thermal model is maintained in the RAM with no timing or decrementing. When the motor restarts, the microcontroller calculates a change in capacitor voltage to estimate the motor stop duration. The thermal model is decremented based on the estimated duration.

Find Patent Forward Citations

Jefferies, Kevin. (2016). Nonvolatile thermal memory method and apparatus for electronic overload relay (U.S. Patent No. 9300242). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9300242

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…