Switching state of a mechanical switch
US10209311B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2017 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Nov 16, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W10/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for monitoring a switching state of a mechanical switch is provided that includes a first mechanical switch configured to couple a high-voltage power storage device to a load, a measuring device that measures a voltage characteristic at the first mechanical switch, the measuring device is being connected to the first mechanical switch via a first measuring resistor such that a voltage drop at the first mechanical switch is measurable over a period of time, an insulation-monitoring unit having a first switchable resistor that can be switched in during measuring such that a voltage divider formed by two or more insulation resistors (R_iso+, R_iso−) of the high-voltage power storage device is modified, and an evaluation device that compares the measured voltage characteristic at the first mechanical switch with a predefined threshold value so that the switching state of the first mechanical switch can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.