发明申请
- 专利标题: HYBRID BI-DIRECTIONAL DC CONTACTOR AND METHOD OF CONTROLLING THEREOF
- 专利标题(中): 混合双向直流接触器及其控制方法
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申请号: US13325174申请日: 2011-12-14
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公开(公告)号: US20130154774A1公开(公告)日: 2013-06-20
- 发明人: Vijay Bhavaraju , Tiefu Zhao , Peter J. Theisen
- 申请人: Vijay Bhavaraju , Tiefu Zhao , Peter J. Theisen
- 主分类号: H01H51/06
- IPC分类号: H01H51/06
摘要:
A hybrid DC contactor includes contacts that provide a first current path between a DC power source and a load, an electromagnetic coil to position the contacts, a semiconductor switch in parallel with contacts that, when turned on, provides a second parallel current path that diverts current away from the contacts when the main contacts are being opened in either direction. A controller is provided to terminate power to the electromagnetic coil to open the contacts, detect an arc voltage across the contacts as the contacts open, provide a gate signal to the semiconductor switch to pulse the switch on for a pre-determined period of time to route current to the semiconductor switch, measure a current through the contacts and, if current is present through the contacts, then provide another gate signal to the semiconductor switch to pulse the switch on again so as to route current thereto.
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