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:
Sep. 09, 2025
Filed:
May. 19, 2023
Nsk Ltd., Tokyo, JP;
Masahiko Fujita, Tokyo, JP;
NSK LTD., Tokyo, JP;
Abstract
A power source device including: a DC power source; an inverter to which power is supplied from the DC power source; a capacitor connected between the DC power source and the inverter in parallel with the inverter; a reverse connection protection circuit connected between the DC power source and the capacitor and configured to block current flowing through a positive electrode-side power source line of the DC power source from the capacitor to the DC power source; and an overvoltage protection circuit configured to control both-end voltage across the capacitor to a voltage less than or equal to a predetermined voltage when the both-end voltage becomes greater than or equal to the predetermined voltage.