Power supply device and method for making decision as to contactor weld of power supply device
US8513953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Sep 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/001
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply device includes: a power supply; a first contactor and a second contactor that are connected between the power supply and a load; a voltage detection circuit that detects a voltage between a load side of the first contactor and a power supply side of the second contactor; and a control unit that sets the contactors to an open/closed state. In a state in which electrical power has not been supplied to the load, a voltage which is greater than zero and less than a voltage at the power supply is applied between a positive electrode and a negative electrode on the load side; and after controlling the contactors to an open state, the control unit makes a decision as to whether or not one of the contactors is welded based upon detection results of the voltage detection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.