Insulation inspection instrument
US9476944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Dec 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A continuity tester that has particular application for inspecting the insulation on the stator windings in an electric machine. The continuity tester includes a power supply, a brush having conductive bristles, and an analog-to-digital (A/D) converter. One terminal of the power supply is electrically coupled to the brush and another terminal of the power supply is electrically coupled to the A/D converter and the stator being tested. The conductive brush is selectively positioned against the exposed windings of the stator, and if an electrical circuit is formed as a result of loss of insulation, the potential at the input of the A/D converter drops, which can be detected. In one embodiment, the conductive brush is a manual brush that is moved across the stator windings, and in alternate embodiments the conductive brush is specially configured to be positioned against the conductive windings in an automated process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.