Electric vehicle supply equipment and a method of determining a state of a contactor in electric vehicle supply equipment
US10150374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2016 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Mar 9, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Electric vehicle supply equipment includes a contactor having a first set of contacts and a second set of contacts, an amplifier circuit electrically connected to the load side output of the first set of contacts via a first connection and to the load side output of the second set of contacts via a second connection, the amplifier circuit being structured to amplify a voltage difference between a first voltage at the first connection and a second voltage at the second connection, and control electronics structured to compare the amplified voltage difference to a threshold voltage and to determine whether the first and second sets of contacts are closed based on the comparison between the amplified voltage difference and the threshold voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.