Anti-reverse connection circuit for power supply
US6519126B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Mar 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H11/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An anti-reverse connection circuit for a power supply comprises an input terminal connected to a positive polarity of an external power supply, an input terminal connected to a negative polarity of the external power supply, load terminals connected to a load, a relay having a normally opened contact and an excitation coil, and a control circuit for allowing a current to flow in the excitation coil. Either one of the input terminal and the load terminal, and the input terminal and the load terminal is connected to each other via the normally opened contact, and the other thereof is directly connected to each other. Only when the positive polarity is connected to the input terminal and the negative polarity is connected to the input terminal, a switch transistor of the control circuit is turned on to allow a current to flow in the excitation coil, thereby closing the normally opened contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.