CONTROL CIRCUIT OF DIODE CONTACT PROTECTION COMBINATION SWITCH AND RELAY CONTROL METHOD

Title:

CONTROL CIRCUIT OF DIODE CONTACT PROTECTION COMBINATION SWITCH AND RELAY CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2014/206306

Kind Code:

A1

Abstract:

A diode contact protection combination switch and a specific implementation method. The combination switch comprises a primary contact protection circuit formed by a primary switch contact of a primary relay, diodes parallel connected at two ends of the primary switch contact, and a contact of a secondary relay. A current capacity of the secondary relay is 1/10 to 1/1000 of a current capacity of a contact of the primary relay. A drive current of the primary relay changes according to a certain rule, so as to shorten travel time of the relay. The implementation method is a control method of shortening travel time of a relay, in which a current flowing through a relay is controlled by a PWM wave output by a single chip microcomputer of a relay control circuit. The diode contact protection combination switch is an on/off switch in the case of current zero crossing, which can easily implement over-current and over-voltage protection and remote manipulation functions. By means of the relay control method, travel time when a relay is closed/opened can be greatly shortened on the premise that the service life of the relay is ensured.

Inventors:

WANG HAI (CN)

Application Number:

PCT/CN2014/080785

Publication Date:

December 31, 2014

Filing Date:

June 26, 2014

Export Citation:

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Assignee:

CYRK INTERNAT TECHNOLOGY CO LTD (CN)

International Classes:

H01H47/02

Foreign References:

CN102623220A	2012-08-01
CN102299519A	2011-12-28
CN101635209A	2010-01-27
JP2013090550A	2013-05-13
JP2006059666A	2006-03-02
US3223888A	1965-12-14
US3284684A	1966-11-08
CN01111050A	2001-03-24

Other References: