CN103247480A

CN103247480A - Electronic-type overload relay with reliable action

Info

Publication number: CN103247480A
Application number: CN2013101811714A
Authority: CN
Inventors: 史祺; 白文敏; 暴凤蓉; 刘冬英; 李鹏
Original assignee: Tianjin Baili Electronic Co Ltd
Current assignee: Tianjin Baili Electronic Co Ltd
Priority date: 2013-05-16
Filing date: 2013-05-16
Publication date: 2013-08-14
Anticipated expiration: 2033-05-16
Also published as: CN103247480B

Abstract

The invention relates to an electronic-type overload relay with reliable action, comprising a support, a U-shaped iron core, another two permanent magnets, a permanent seat and two coils, wherein two permanent magnets are arranged in frameworks at the end parts of support arms at the two sides of the support respectively, each coil is provided with two windings, both the left and the right of the permanent seat are respectively provided with a framework, the another two permanent magnets are arranged in the frameworks respectively, the permanent seat is fixedly connected with the support, and the end parts of two side arms of the iron core are arranged between the frameworks of the support and the frameworks of the permanent seat, and the two coils are arranged on the two side arms respectively. According to the electronic-type overload relay, due to the adoption of the four permanent magnets and the two dual-winding coils which are in the structure of two bilaterally symmetrical groups, so that the releasing magnetic force and the resetting magnetic force are two times those of the conventional structure, and the acting force is symmetric, so that the action reliability is improved; and sincethe iron core is attracted through two bilaterally symmetrical permanent magnets when a switching mechanismis positioned in a static state, the attraction force is increased by two times, the auxiliary contact spring final pressure matched with the attraction force is also increased, and accordingly, the contact breakover reliability is improved.

Description

The electronic overload relay of reliable in action

Technical field

The invention belongs to a kind of control apparatus, particularly relate to a kind of electronic overload relay of reliable in action.

Background technology

In present known TR40 series electronic formula overload relay dropout and the switching mechanism that resets, single coil and the iron core of action employing on U font iron core one side arm realized threading off in magnetic force and the interaction of single permanent magnet of this side arm end generation owing to threading off, homing action then adopts the single coil of symmetrical opposite side and iron core to realize resetting in magnetic force and the interaction of another permanent magnet that the other end produces, magnetic force deficiency because of the generation of single magnetic field, cause dropout and homing action unreliable, and when remaining static, switching mechanism adopts single permanent magnet and iron core adhesive, the suction deficiency also causes the auxiliary contact spring end pressure that cooperates with this power little, causes the contact conducting unreliable.

Summary of the invention

The present invention for solve the technical problem that exists in the known technology provide a kind of strengthen thread off and reset in the electronic overload relay of reliable in action of magnetic field active force.

The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: it includes the support of switching mechanism, a U font iron core and two permanent magnets, described two permanent magnets are installed in respectively in the framework of the symmetrical both sides of described support arm end, also include two other permanent magnet, a holder and two coils that two windings are respectively arranged; Described holder is divided into symmetrical two parts, two parts bottom is fixed together by a flat board, each part in the symmetrical two parts of described holder all is fixed with a framework that a described permanent magnet can be installed, described two parts framework upper be separated from each other and all be fixed with a bent plate of falling L above the part frame at each, described two other permanent magnet namely is installed in respectively in the framework in described holder two parts, the horizontal plate portions of the top of two bent plates of falling L of described holder is inserted respectively in the framework of described support both sides arm end, and be pressed in below two permanent magnets in the described insertion Support frame, described holder and described support are fixed together, and the polarity that is installed in described two other permanent magnet in the described holder framework is identical with permanent magnet polarity direction in the described framework that is installed in support both sides arm end; The space of two side arm ends when between the two-part framework of framework and the described holder left and right sides of described support both sides arm end, respectively having can hold described U font iron core horizontal positioned in addition, described U font iron core horizontal positioned and on the left and right sides arm of described U font iron core, respectively be set with a described coil respectively, but the winding winding direction of described coil is opposite, and a winding in the coil on the arm of described U font iron core left side and a winding in the coil on the described U font iron core right arm are connected in parallel; Another winding in the coil on the arm of same described U font iron core left side and another winding in the coil on the described U font iron core right arm are connected in parallel; The two ends of one group of winding after the described parallel connection are connected in respectively on the described electronic overload relay trip signal collection terminal, and the two ends of another group winding after the described parallel connection are connected in respectively on the electronic overload relay reset signal collection terminal.

Advantage and good effect that the present invention has are: owing to adopt four permanent magnets and two double winding coils, and structure is symmetrical two groups, make to thread off and the magnetic force when resetting is original twice, and the active force symmetry, improved reliable in action.In addition, adopt symmetrical two permanent magnets and iron core adhesive when remaining static owing to switching mechanism, suction is original twice, has also improved the auxiliary contact spring end pressure that cooperates with this power, thereby has improved contact conducting reliability.

Description of drawings

Fig. 1 is the structural representation of the present invention in TR40 series electronic formula overload relay;

Fig. 2 is Fig. 1 upward view;

Fig. 3 is the structural representation of holder;

Fig. 4 is the left side view of Fig. 3.

Embodiment

For further understanding content of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

Shown in Fig. 1,2,3,4, the permanent magnet 2 of can packing into, 5 framework have been arranged respectively on the end of the left and right sides support arm of electronic overload relay support 1 in known technology.Can be further at the downside of the end of the both sides of support 1 support arm the holder 3 of the framework 11 of a permanent magnet be installed respectively again as one, one base plate 10 is arranged at its bottom, symmetrical two parts are arranged on the base plate 10, each part bottom all have one with electronic overload relay support 1 on pack into

permanent magnet

2,5 the laterally zygomorphic equal-sized framework 11 of framework.Permanent magnet 4 is housed respectively in this framework, 7. a side on plane has one to fall L shaped bent plate 12 on framework 11, insert respectively in the permanent magnet 2 of packing on the support 1,5 the framework on the last plane of this bent plate 12, and be crushed on

permanent magnet

2,5 below, holder 3 and support 1 are fixed together.Coil 9 is enclosed within on the left side arm of U font iron core 6, and oppositely on the right arm of U font iron core 6, coil 9 and coil 8 are the two-wire coiling to coil 8 covers, are double winding.Can see the termination of U font iron core 6 behind incision holder 3 base plates.Winding in the coil 9 on the arm of U font iron core left side and a winding in the coil 8 on the U font iron core right arm are connected in parallel; Another winding in the coil 9 on the arm of same U font iron core left side and another winding in the coil 8 on the U font iron core right arm are connected in parallel; The two ends of the winding after the parallel connection are connected on trip signal collection terminal and the reset signal collection terminal of electronic overload relay respectively in twos.

When electronic overload relay is in normal operating conditions, when being the initial reset state, the left side permanent magnet 5 of support 1 and the left side arm of iron core 6 are pulled together, the right side permanent magnet 4 of holder and the right arm of iron core 6 are pulled together, when fault takes place, the one group of tripping coil that is connected in parallel collects trip signal, winding gets, in one of termination, iron core 6 left side generation and permanent magnet 5 opposite magnetic fields both are repelled each other, producing simultaneously a magnetic field opposite with permanent magnet 4 in the termination, right side of iron core 6 repels each other both, the left and right sides acts on simultaneously and makes support 1 and holder 3 and the permanent magnet 5 that links together, 2,7,4 swings clockwise together realize the action of threading off; Left side permanent magnet 7 and the termination, iron core 6 left side of holder 3 are pulled together after threading off, and right side permanent magnet 2 and the termination, iron core 6 right side of support 1 are pulled together simultaneously; When described another group resetting coil that is connected in parallel collects reset signal, winding gets, in one of termination, iron core 6 left side generation and permanent magnet 7 opposite magnetic fields both are repelled each other, simultaneously another winding of coil 8 gets and electricly produces one and permanent magnet 2 opposite magnetic fields in termination, iron core 6 right side both are repelled each other, the left and right sides acts on simultaneously and makes the support 1 that links together and holder 3 and

permanent magnet

5,2,7,4 counter-clockwise swing together, realizes homing action.

Claims

1. the electronic overload relay of a reliable in action, it includes the support of switching mechanism, a U font iron core and two permanent magnets, described two permanent magnets are installed in respectively in the framework of the symmetrical both sides of described support arm end, it is characterized in that: also include two other permanent magnet, a holder and two coils that two windings are respectively arranged; Described holder is divided into symmetrical two parts, two parts bottom is fixed together by a flat board, each part in the symmetrical two parts of described holder all is fixed with a framework that a described permanent magnet can be installed, described two parts framework upper be separated from each other and all be fixed with a bent plate of falling L above the part frame at each, described two other permanent magnet namely is installed in respectively in the framework in described holder two parts, the horizontal plate portions of the top of two bent plates of falling L of described holder is inserted respectively in the framework of described support both sides arm end, and be pressed in below two permanent magnets in the described insertion Support frame, described holder and described support are fixed together, and the polarity that is installed in described two other permanent magnet in the described holder framework is identical with permanent magnet polarity direction in the described framework that is installed in support both sides arm end; The space of two side arm ends when between the two-part framework of framework and the described holder left and right sides of described support both sides arm end, respectively having can hold described U font iron core horizontal positioned in addition, described U font iron core horizontal positioned and on the left and right sides arm of described U font iron core, respectively be set with a described coil respectively, but the winding winding direction of described coil is opposite, and a winding in the coil on the arm of described U font iron core left side and a winding in the coil on the described U font iron core right arm are connected in parallel; Another winding in the coil on the arm of same described U font iron core left side and another winding in the coil on the described U font iron core right arm are connected in parallel; The two ends of one group of winding after the described parallel connection are connected in respectively on the described electronic overload relay trip signal collection terminal, and the two ends of another group winding after the described parallel connection are connected in respectively on the electronic overload relay reset signal collection terminal.