Quick turn off of contactor system during power off
US12179617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2022 |
| Grant date | Dec 31, 2024 |
| Priority date | — |
| Expiry date | Jul 7, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L2270/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Examples of contactor controllers, systems and methods enable quick-turn-off (QTO) using an output voltage of a contactor controller when its supply voltage is below a threshold but does not interfere with QTO when sufficient supply voltage is available. In an example, when VM loss occurs, a high-side (HS) clamp of a contactor controller is disabled, and a low-side (LS) clamp current is generated using the output voltage. The LS clamp current may be adjusted to achieve a desired QTO voltage. In another example, a HS clamp is disabled and the charging of the gate of a LS field-effect transistor (FET) is enabled only when the output voltage increases above a power-off QTO threshold (less than the LS clamp voltage); the QTO voltage is set by a voltage detection and comparison circuit of the contactor controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.