CN203445006U

CN203445006U - Electromagnetic system used for energy-efficient control and protection switch

Info

Publication number: CN203445006U
Application number: CN201320525072.9U
Authority: CN
Inventors: 曹敏; 吕亦成; 周阳中
Original assignee: JIANGSU (YANGZHOU) XINCHEN ELECTRICAL Co Ltd
Current assignee: JIANGSU (YANGZHOU) XINCHEN ELECTRICAL Co Ltd
Priority date: 2013-08-26
Filing date: 2013-08-26
Publication date: 2014-02-19
Anticipated expiration: 2023-08-26

Abstract

The utility model discloses an electromagnetic system used for an energy-efficient control and protection switch. The electromagnetic system comprises an electromagnet module, the inner of the electromagnet module is provided with an iron core group, wherein the iron core group is formed by buckling two iron cores, a first coil assembly and a second coil assembly are wound on the iron core group, and the first coil assembly and the second coil assembly are respectively provided with an internal layer coil and an external layer coil. The beneficial effects of the electromagnetic system are mainly reflected in that: the temperature rise of the whole electromagnetic system is low when the electromagnetic system works; the whole power consumption is low, and the energy saving effect is obvious; and the cleanliness of the attraction surface of the iron core has no effect on the service life of the electromagnet.

Description

A kind of electromagnetic system for energy-saving control and protective switch

Technical field

The utility model relates to a kind of electromagnetic system for energy-saving control and protective switch, belongs to electric equipment technical field.

Background technology

Control and protective switch is a kind of intelligent device for switching that the functions such as circuit breaker, contactor, thermal relay are rolled into one.Be mainly used in the occasion that need to protect motor.Major function has: short-circuit protection, open phase protection, rotation-clogging protection, overcurrent protection, overvoltage/undervoltage protection and earth leakage protective.Normal break-make and the contactor of switch are similar, are adhesive and the through and off that discharge control switch main contact by electromagnet.Because the principle of alternating electromagnet is simple, cost is lower, and current control and protective switch is all generally the mode that adopts alternating electromagnet adhesive.Yet the mode of alternating electromagnet adhesive exists many shortcomings, as:

1. temperature rise, the temperature rise of alternating electromagnet is mainly derived from two aspects: alternating magnetic field produces eddy current and forms iron loss on iron core; The copper loss that electric current produces by coil.The temperature rise of this two aspect all cannot overcome.High temperature is understood the aging of acceleration switch device, shortens the useful life of switch.

2. reliability is low, while there is dust or rust staining on the adhesive face of electromagnet core, will cause leakage field, and at this moment the suction of electromagnet can be not enough, hummed, coil electric current can sharply rise, the temperature of coil can fast rise, until coil burnout.

3. energy consumption is too high, and because the temperature rise of alternating electromagnet is very high, the utilance of electric energy is just very low.Electric energy conversion has greatly become thermal loss to fall.The electromagnetism adhesive system of this high energy consumption has not met the requirements of the times of low-carbon environment-friendly.

Utility model content

The purpose of this utility model is to solve the problems referred to above that in the control and protective switch of prior art, alternating electromagnet attracting mode exists, and provides a kind of electromagnetic system for energy-saving control and protective switch to solve the problems referred to above.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of electromagnetic system for energy-saving control and protective switch; comprise; electromagnet assembly; in described electromagnet assembly, be provided with iron core group; wherein; described iron core group is fastened and is formed by two iron cores, is wound with the first coil groups and the second coil groups in iron core group, in described the first coil groups and the second coil groups, is equipped with inner coil and outer coil.

As a kind of preferred version, the number of turn of described inner coil is less than the number of turn of outer coil.

The beneficial effects of the utility model are mainly reflected in:

1. temperature rise when whole electromagnetism is worked is very low, and what in coil, actual flow was crossed is direct current, there is no alternating magnetic field, and core interior can not produce eddy current, does not have iron loss; After electromagnetic actuation, by low-power coil, maintained, electric current is very little, and the temperature rise of coil is also very low, has reduced greatly copper loss.

2. overall power consumption is low, and energy-saving effect is obvious, and high-power coil, only in the energising of the moment of electromagnetic actuation, only has the energising of low-power coil during switch normal operation, and all power consumptions are very low.

3. the cleannes of iron core adhesive face are on the not impact of the life-span of electromagnet, and electromagnet is logical direct current, so the electric current in coil is only relevant with the internal resistance of coil, it doesn't matter with the distance of iron core adhesive face.Therefore coil can not cause because of the cleannes of iron core adhesive face burning of coil.

Accompanying drawing explanation

Fig. 1 is the structural representation of middle iron core of the present utility model;

Fig. 2 is for controlling the circuit diagram of the utility model coil work.

Embodiment

For making that architectural feature of the present utility model and the effect reached are had a better understanding and awareness, in order to preferred embodiment and accompanying drawing, coordinate detailed explanation, be described as follows:

Operation principle of the present utility model is a kind of twin coil time-sharing work that passes through, and realizes the adhesive of electromagnet and maintains, and need to there be larger the suction-combining force the moment of adhesive, powerful coil is first switched on, after adhesive completes, high-power coil losing electricity, small-power coil electricity maintains the state of adhesive.

As shown in Fig. 1～2, a kind of electromagnetic system for energy-saving control and protective switch, comprise: electromagnet assembly, in electromagnet assembly, be provided with iron core group, described iron core group is fastened and is formed by the first iron core 31 and the second iron core 32, iron core group is provided with First Line ring framework 321 and the second coil rack 322, on First Line ring framework 321 and the second coil rack 322, be wound with respectively the first coil groups and the second coil groups, because the first coil groups is identical with the second coil groups structure, therefore first coil groups of only take is set forth as example, in the first coil groups, on First Line ring framework 321, be wound with outer coil 3211 and inner coil 3212, inner coil 3212 enamelled wire diameter used is thick, the number of turn of line is less, for high-power coil, the diameter of the enamelled wire that outer coil 3211 is used is thin, the number of turn of line is many, for small-power coil.

When utilizing circuit to control inner coil and outer coil work, rectifier bridge DB1 is converted into direct current the alternating current of input, after powering on, the voltage of contact 3 is lower, and voltage-stabiliser tube D1 can not conducting, and low-power coil can not be worked, and field effect transistor Q3 is in conducting state, high-power coil electricity work, electromagnetic actuation, connects the main contacts of control and protective switch; After voltage stabilization, voltage is higher than the voltage-stabiliser tube value of voltage-stabiliser tube D1, D1 conducting, make the energising of low-power coil, voltage comparator U1 has had working power VCC and has worked simultaneously, makes triode Q2 and Q5 conducting, the at this moment voltage reversal of field effect transistor Q3 grid and source electrode biasing, Q3 disconnects, high-power coil blackout.The required electric current of low-power coil work is very little, so just makes electromagnet reach energy-conservation object; If voltage drop in using; voltage-stabiliser tube D1 can not conducting; the power-off of low-power coil; by voltage comparator U1, triode Q5 is disconnected; make field effect transistor Q3 conducting; high-power coil electricity work, prevents that with this supply line's voltage instability from impacting control and protective switch, improves reliability.

In sum, it is only preferred embodiment of the present utility model, not be used for limiting the scope that the utility model is implemented, all equalizations of doing according to the shape described in the utility model claim scope, structure, feature and spirit change and modify, and all should be included within the scope of claim of the present utility model.

Claims

1. the electromagnetic system for energy-saving control and protective switch; comprise; electromagnet assembly; in described electromagnet assembly, be provided with iron core group; it is characterized in that; described iron core group is fastened and is formed by two iron cores, is wound with the first coil groups and the second coil groups in iron core group, in described the first coil groups and the second coil groups, is equipped with inner coil and outer coil.

2. a kind of electromagnetic system for energy-saving control and protective switch according to claim 1, is characterized in that, the number of turn of described inner coil is less than the number of turn of outer coil.