Title:
ON-LOAD VOLTAGE REGULATION TAPPING SWITCH OF TRANSFORMER AND ON-LOAD VOLTAGE REGULATION TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2017/084634
Kind Code:
A1
Abstract:
An on-load voltage regulation tapping switch of a transformer is composed of a tapping switch unit and a switch control circuit. The tapping switch unit is composed of two relay switch contacts (K1, K2) and corresponding contact protection circuits. One end of each of the two switch contacts (K1, K2) is connected to corresponding transformer winding taps (1, 2), and the other end is connected to a power supply after being connected in parallel. Two switch contact protection branch circuits are a series circuit of an MOS transistor (T1) and an auxiliary relay contact (K11) and a series circuit of a diode (D11) and the auxiliary relay contact (K11) respectively. The two series circuits are connected to two ends of the corresponding switch contact (K1) in parallel respectively. Multiple such tapping switch units are connected to one another in parallel to form a multi-winding branch tapping switch. The switch control circuit controls all main switches, auxiliary switches and MOS transistors (T1) to act according to a certain time order, so that switching of transformer windings is completed. The on-load voltage regulation tapping switch of a transformer has the advantages of being high in tapping speed, free of an inrush current in a tapping process, continuous in current, simple to operate, high in reliability, small in size, light in weight, low in cost and the like.
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Inventors:
WANG HAI (CN)
Application Number:
PCT/CN2016/106664
Publication Date:
May 26, 2017
Filing Date:
November 21, 2016
Export Citation:
Assignee:
WANG HAI (CN)
International Classes:
H01F29/04
Foreign References:
| CN105632727A | 2016-06-01 | |||
| CN102077306A | 2011-05-25 | |||
| CN101630916A | 2010-01-20 | |||
| CN104362751A | 2015-02-18 | |||
| US20060039171A1 | 2006-02-23 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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