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.:
Date of Patent:
Mar. 11, 2025
Filed:
Dec. 12, 2022
Eaton Intelligent Power Limited, Dublin, IE;
Deepak Balaji Somayajula, Maharashtra, IN;
Swati Narula, New Delhi, IN;
Sravanthi Srikantam, Andhra Pradesh, IN;
Satish Mohanty, Pune, IN;
Chaitanya Pradeep Bhalwankar, Pune, IN;
Stuart John Moody, Portchester, GB;
Daniel Peck, Southampton, GB;
Ranjith Kumar Sreenilayam Raveendran, Maharashtra, IN;
EATON INTELLIGENT POWER LIMITED, Dublin, IE;
Abstract
A health signature of each switching device in a control system is estimated using system parameters such as a DC-link voltage, three-phase voltages, three-phase currents, and temperature. The switching devices can be implemented as transistors, and a health signature for each transistor may be an on-state resistance or an on-state voltage of the transistors. For example, the on-state resistance for a metal-oxide-semiconductor field-effect transistor (MOSFET) functions as a health signature. Alternatively, the on-state voltage is used as a health signature for an insulated-gate bipolar transistor (IGBT). Additionally, a junction temperature is estimated for each transistor. Using the estimated health signatures and the junction temperatures, the remaining useful life of each transistor is estimated.