Device for preventing unwanted operation of relay based on pulse transfer |
Title： |
| Device for preventing unwanted operation of relay based on pulse transfer |
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Application Number： |
200610112769 |
Application Date： |
2006/09/01 |
Announcement Date： |
2007/02/21 |
Pub. Date： |
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Publication Number： |
1917319 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H02H 3/05, H01H 47/32, H03K 5/00, H03K 17/795 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Sun Xinya, Ji Yindong, Li Yingchun, Jin Wenguang, Qian Limin, Zhu Shanjun, Dong Dengwu, Xiao Chaoliang |
Key Words： |
pulse transfer, relay, prevent, unwanted operation, device |
Abstract： |
After passing through cascaded pulse transfer circuit, drive circuit, and opto-electronic buffer circuit in sequence, each PWM pulse output end of CPU in PC type protective relay device is connected to each relay respectively. Being connected to base electrode of switch triode in relay circuit, output end of a pointed opto-electronic buffer circuit is in use for turning on power supply of each relay. Positive output end of opto-electronic triode in rest each opto-electronic buffer branch circuit is connected to corresponding positive pole of each diode connected to each relay winding in reversed parallel. Each negative output end in each opto-electronic diode is connected to common ground. The other end of each relay winding is connected to collector of the said switch triode commonly. Advantages are: low cost, and high reliability. |
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 Relevancy information |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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