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:
Dec. 01, 2020
Filed:
Sep. 11, 2014
Maxim Integrated Products, Inc., San Jose, CA (US);
Jiangang Liu, San Jose, CA (US);
Jason Allen Wortham, San Jose, CA (US);
MAXIM INTEGRATED PRODUCTS, INC., San Jose, CA (US);
Abstract
Embodiments of the present invention disclose methods and systems in a vehicle having high voltage (HV) for measuring isolation impedance in an EV or HEV utilizing an AC impedance measurement system. The method utilizes an extraction algorithm based on a Fourier transform to calculate phase and amplitude and then utilizes the calculated phase and amplitude to determine the isolation impedance. The isolation impedance comprises leakage resistance and total capacitance that are coupled in parallel between the high voltage system and the chassis. Embodiments of the present invention also provide a method and systems for component value self-calibration.