Patent · US Active

Testing inverter driven electric motor shut-off path

US7545111B2 · kind B2 · utility

8Cited by

10References

20Claims

0Family size

Assignees

Chrysler Group LLC · US
GM GLOBAL TECHNOLOGY OPERATIONS LLC · US
Daimler AG · DE
Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Zhenxing Fu · Ann Arbor, US
Marcus Heller · Farmington Hills, US

Key dates

Filing date	Dec 22, 2006
Grant date	Jun 9, 2009
Priority date	—
Expiry date	Aug 15, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/24
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for testing electric motor shut-off including injecting current into an electric motor, applying at least one of a short or an open to the electric motor for a predetermined length of time, calculating the rate of decay of the current and comparing rate of the decay with a predetermined decay criteria. In one implementation, a predefined sequence of opening and short circuiting the electric motor is used, and the shut-off path tests for the motor three phases can be verified with one test.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.