Method and apparatus for monitoring a high-voltage electrical circuit including a discharge circuit
US8653841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2012 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | May 10, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A high-voltage discharge circuit diagnostic system includes a high voltage DC link with a positive DC link and a negative DC link, a first resistor selectably connectable between the positive DC link and the negative DC link, and a second resistor connected between the positive DC link and the negative DC link. A control module connects the first resistor between the positive DC link and the negative DC link until the high voltage DC link discharges to a first voltage after which the control module disconnects the first resistor from between the positive DC link and the negative DC link to permit continued discharge of the high voltage DC link through the second resistor to a second voltage through an elapsed time period. The control module diagnoses a fault in the second resistor based upon the first voltage, the second voltage, and the elapsed time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.