Patent · US Active

Method and circuit for detecting a short circuit of the sine or cosine receiver coil of a resolver

US10495494B2 · kind B2 · utility

0Cited by

1References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Benjamin Lechner · Bad Liebenzell, DE
Daniel Zirkel · Mühlacker, DE
Daniel Raichle · Lambach, DE
Michael Ungermann · Gelnhausen, DE

Key dates

Filing date	Jun 7, 2016
Grant date	Dec 3, 2019
Priority date	—
Expiry date	Jun 7, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG01B7/30
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting a short circuit to ground or to the operating voltage of a signal line (11, 12) of a resolver (16) has the following steps: —measuring the potential of the signal lines (13a, 13b; 14a, 14b) of the receiver coil (18) with respect to ground at two sampling times (R and F) provided symmetrically at the middle of the excitation period; —calculating an offset value for a signal line pair (13a, 13b; 14a, 14b) by calculating the average value of the four measured values (UHR, ULR, UHF and ULF) for the associated receiver coil (17, 18); and —identifying a short circuit and the potential to which the short-circuited line is connected in that the offset value is compared to threshold values.

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