Control circuit of magnetic switch

Abstract

The utility model discloses a control circuit of a magnetic switch, which relates to the field of magnetic switches and comprises a charging power supply used for supplying power to a driving module; the driving module is used for supplying power to a coil of the magnetic switch operating mechanism when the switch is closed; the magnetic switch operating mechanism coil is used for realizing opening or closing of a magnetic switch when the magnetic switch operating mechanism coil works; the charging power supply is connected with the driving module which is connected with the magnetic switch operating mechanism coil. Compared with the prior art, the utility model has the beneficial effects that the two switching-off capacitors of the driving module are separated and respectively discharge in turn, the switching-off parameters are not influenced, the reliability of reclosing is ensured, and the switching-off technology of switches such as a protection circuit and load equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic switch field, concretely is a control circuit of magnetic switch. BACKGROUND

[0002] Now magnetic switch, including permanent magnet switch, magnetic control switch etc., its control mode is through the electric capacity storage electric energy, is discharged to the mechanism coil of switch by controllable switch, thereby produces electromagnetic force and makes the dynamic iron core movement complete the operation of closing and opening. In this process, because the electric capacity is discharged, the electric quantity is released, the voltage drops, when opening and closing operation in a short time again, it will affect the opening and closing time parameters of switch.

[0003] And the high voltage switch of power system has a "reclosing" requirement, that is to complete the process of "opening-interval 300 milliseconds-closing-immediately-opening", in this process, the second opening due to the voltage drop of electric capacity, makes the opening time longer, can not satisfy the technical requirement of switch opening time, needs improvement. UTILITY MODEL CONTENTS

[0004] The utility model discloses a control circuit of magnetic switch to solve the problem in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A control circuit of magnetic switch, comprising:

[0007] Charging power supply is used for power supply for drive module;

[0008] Drive module is used for supplying power for magnetic switch operating mechanism coil when switch closing;

[0009] Magnetic switch operating mechanism coil is used for realizing the opening or closing of magnetic switch when working;

[0010] Charging power supply connects drive module, and drive module connects magnetic switch operating mechanism coil.

[0011] As the further scheme of the utility model: drive module includes first drive unit, second drive unit, and first drive unit and second drive unit are same structure.

[0012] As the further scheme of the utility model: first drive unit includes diode D1, electric capacity C1, switch K1, the positive pole of diode D1 connects the positive pole of charging power supply, the negative pole of diode D2 connects one end of electric capacity C1, one end of switch K1, the other end of electric capacity C1 connects the negative pole of charging power supply, the other end of switch K1 connects one end of magnetic switch operating mechanism coil M, and the other end of magnetic switch operating mechanism coil M connects the negative pole of charging power supply.

[0013] The second driving unit comprises a diode D2, a capacitor C2 and a switch K2, the positive pole of the diode D2 is connected to the positive pole of the charging power supply, the negative pole of the diode D2 is connected to one end of the capacitor C2 and one end of the switch K2, the other end of the capacitor C2 is connected to the negative pole of the charging power supply, the other end of the switch K2 is connected to one end of the magnetic switch operating mechanism coil M, and the other end of the magnetic switch operating mechanism coil M is connected to the negative pole of the charging power supply.

[0014] As a further scheme of the utility model: the switch K1 and K2 can only act one time, and act in turn, namely when the switch K1 is closed, the switch K2 is opened, when the switch K2 is closed, the switch K1 is opened.

[0015] As a further scheme of the utility model: the switch K1 and K2 are controllable switches, and the types of the controllable switches include relay, contactor, thyristor, MOSFET, IGBT, triode, solid-state relay, variable phase controllable mechanical and electronic switch.

[0016] Compared with the prior art, the utility model has the beneficial effects that: two separate brake capacitors of the driving module in the utility model are separated and discharged in turn, do not affect the brake parameter, ensure the reliability of the reclosing, and improve the switching brake technology of the protection line, load equipment and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a circuit diagram of a control circuit of a magnetic switch. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Please refer to Figure 1 It is a control circuit of a magnetic switch, comprising:

[0020] A charging power supply is used for supplying power to the driving module.

[0021] The driving module is used for supplying power to the magnetic switch operating mechanism coil when the switch is closed.

[0022] The magnetic switch operating mechanism coil is used for realizing the brake or reclosing of the magnetic switch when working.

[0023] The charging power source is connected to a driving module, and the driving module is connected to a magnetic switch operating mechanism coil.

[0024] In the embodiment, please refer to Figure 1 The driving module comprises a first driving unit and a second driving unit, and the first driving unit and the second driving unit are of the same structure.

[0025] In the embodiment, please refer to Figure 1 The first driving unit comprises a diode D1, a capacitor C1 and a switch K1, the positive electrode of the diode D1 is connected to the positive electrode of the charging power source, the negative electrode of the diode D2 is connected to one end of the capacitor C1 and one end of the switch K1, the other end of the capacitor C1 is connected to the negative electrode of the charging power source, the other end of the switch K1 is connected to one end of the magnetic switch operating mechanism coil M, and the other end of the magnetic switch operating mechanism coil M is connected to the negative electrode of the charging power source.

[0026] The second driving unit comprises a diode D2, a capacitor C2 and a switch K2, the positive electrode of the diode D2 is connected to the positive electrode of the charging power source, the negative electrode of the diode D2 is connected to one end of the capacitor C2 and one end of the switch K2, the other end of the capacitor C2 is connected to the negative electrode of the charging power source, the other end of the switch K2 is connected to one end of the magnetic switch operating mechanism coil M, and the other end of the magnetic switch operating mechanism coil M is connected to the negative electrode of the charging power source.

[0027] In the embodiment, please refer to Figure 1 The switches K1 and K2 can only act one at a time, and act in turn, that is, when the switch K1 is closed, the switch K2 is opened, and when it is the turn of the switch K2 to be closed, the switch K1 is opened.

[0028] In the embodiment, please refer to Figure 1 The switches K1 and K2 are controllable switches, and the types of the controllable switches include relays, contactors, thyristors, MOSFETs, IGBTs, triodes, solid-state relays, variable-phase controllable mechanical switches and electronic switches.

[0029] When the charging power supply is powered on, the output charging current and voltage charge the large capacity capacitors C1 and C2 through diodes D1 and D2 respectively, when the capacitors C1 and C2 are fully charged, wait for the operation command, after the control system gives the tripping command, through the controllable switch K1 or K2 closing to discharge the magnetic switch operating mechanism coil M, the discharge current drives the moving core of the magnetic switch operating mechanism coil M to realize movement, realizes the purpose of tripping or closing. The switch K1 or K2 can only act one time, and the turn is action, that is to say, a tripping command is switch K1 closing, the next tripping command is switch K2 closing. When the switch K1 is closed, the capacitor C1 discharges, the charging power supply will automatically charge the capacitor C1, and it does not affect the work of the capacitor C2 and the switch K2. Therefore, the next time the capacitor C2 and the switch K2 are responsible for tripping, and the tripping time will not be longer because of the voltage drop of the capacitor, which cannot meet the technical requirements of the switch tripping time. When the capacitor C2 and the switch K2 trip, the capacitor C1 is fully charged again, and waits for the next tripping command. Here, taking tripping as an example, the closing principle is similar, and will not be repeated here.

[0030] The working principle of the utility model is: charging power supply is used for driving module power supply;Driving module is used for closing switch, for magnetic switch operating mechanism coil power supply;Magnetic switch operating mechanism coil is used for working, realizing the tripping or closing of magnetic switch.

[0031] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting.

[0032] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A control circuit for a magnetic switch, characterized in that The control circuit of the magnetic switch comprises: a charging power supply for powering the driving module; a driving module for powering the magnetic switch operating mechanism coil when the switch is closed; a magnetic switch operating mechanism coil for realizing the opening or closing of the magnetic switch when working; the charging power supply is connected to the driving module, and the driving module is connected to the magnetic switch operating mechanism coil.

2. The control circuit of a magnetic switch according to claim 1, characterized in that, The driving module comprises a first driving unit and a second driving unit, and the first driving unit and the second driving unit are of the same structure.

3. The control circuit of a magnetic switch according to claim 2, characterized in that, The first driving unit comprises a diode D1, a capacitor C1 and a switch K1, the positive electrode of the diode D1 is connected to the positive electrode of the charging power supply, the negative electrode of the diode D2 is connected to one end of the capacitor C1 and one end of the switch K1, the other end of the capacitor C1 is connected to the negative electrode of the charging power supply, one end of the magnetic switch operating mechanism coil M is connected to the other end of the switch K1, and the other end of the magnetic switch operating mechanism coil M is connected to the negative electrode of the charging power supply; The second driving unit comprises a diode D2, a capacitor C2 and a switch K2, the positive electrode of the diode D2 is connected to the positive electrode of the charging power supply, the negative electrode of the diode D2 is connected to one end of the capacitor C2 and one end of the switch K2, the other end of the capacitor C2 is connected to the negative electrode of the charging power supply, one end of the magnetic switch operating mechanism coil M is connected to the other end of the switch K2, and the other end of the magnetic switch operating mechanism coil M is connected to the negative electrode of the charging power supply.

4. The control circuit of a magnetic switch according to claim 3, characterized in that, Only one of the switches K1 and K2 can act at a time, and they act in turn, that is, when the switch K1 is closed, the switch K2 is open, and when it is the turn of the switch K2 to be closed, the switch K1 is open.

5. A control circuit for a magnetic switch according to claim 3 or 4, characterised in that, The switches K1 and K2 are controllable switches, and the types of the controllable switches include relays, contactors, thyristors, MOSFETs, IGBTs, triodes, solid-state relays, variable-phase controllable mechanical switches and electronic switches.

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