Method and circuit for detecting a short circuit of a resolver exciter line to ground or to the operating voltage
US10359467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2016 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Sep 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2829
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting a short circuit (10) of a resolver exciter line (11, 12) comprising the steps of:measuring (31) the excitation voltage (U(ti) for the resolver (16) at a number of points in time during each excitation period;determining (32) the amplitude of the excitation voltage;starting a diagnostic mode (33) having the following steps (34 bis 37) if the amplitude of the excitation voltage does not reach a first threshold value;retrieving (34) the time-dependent voltage curves UH (ti) of the first and the second exciter line (H; 11) with respect to ground at the number of points in time;calculating (35) the amplitudes and the offset values of the time-dependent voltage curves;identifying (36) the exciter line that has a short circuit by determining that the calculated amplitudes do not exceed a second threshold value;identifying (37) the potential to which the short-circuited line (H or L) can be connected by comparing the offset values to third threshold values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.