High voltage bus-to-chassis isolation resistance and Y-capacitance measurement

US9696384B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Fang Wang · Troy, US
• Wei Liu · Warren, US
• Jochen Lenz · Hattersheim, DE
• Peter Andres · Ginsheim-Gustavsburg, DE

Key dates

• Filing date: Aug 22, 2013
• Grant date: Jul 4, 2017
• Expiry date: Sep 6, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system and method of simultaneously calculating an isolation resistance and a y-capacitance of a RESS may include the steps of: injecting a first signal into a RESS; recording an output signal from the RESS in response to the injection of the first signal; multiplying the first signal with the output signal to determine a first product; multiplying a second signal with the output signal to determine a second product wherein the second signal is orthogonal to the first signal; filtering the first product to determine a first constant; filtering the second product to determine a second constant; processing the first constant to determine a y-capacitance value; and processing the second constant to determine an isolation resistance value.