CN205911733U - Electricity permanent -magnetic chuck short circuit protecting system - Google Patents
Electricity permanent -magnetic chuck short circuit protecting system Download PDFInfo
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- CN205911733U CN205911733U CN201620665239.5U CN201620665239U CN205911733U CN 205911733 U CN205911733 U CN 205911733U CN 201620665239 U CN201620665239 U CN 201620665239U CN 205911733 U CN205911733 U CN 205911733U
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- circuit
- exciting coil
- current sensor
- magnet exciting
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Abstract
The utility model discloses an electricity permanent -magnetic chuck short circuit protecting system, this system includes: the current sensor who is connected with the excitation coil of electric permanent -magnetic chuck, the silicon controlled rectifier rectifier circuit who is connected with current sensor, be connected with silicon controlled rectifier rectifier circuit, current sensor and excitation coil, fill at excitation coil and move back before magnetic does, trigger a silicon controlled rectifier rectifier circuit output presupposition voltage to first electric current among the excitation coil that receive real -time current sensor gathered is judged the excitation coil short circuit of electric permanent -magnetic chuck, and is stopped silicon controlled rectifier rectifier circuit's the controller that triggers when first electric current is greater than the presupposition current threshold value. Resistance to load excitation coil at every turn before filling the demagnetization has carried out the judgement of an accuracy, if excitation coil stops to trigger excitation current unusually promptly, realized the short circuit condition and protected in advance, prevented the emergence of the short circuit condition, improved the security and the reliability of the operation of electric permanent -magnetic chuck.
Description
Technical field
This utility model is related to electric permanent magnetic controller technical field, more particularly to a kind of electric permanent-magnet suction disc short-circuit protection system
System.
Background technology
Electric permanent-magnet suction disc is widely used in machine industry as a kind of economic and environment-friendly clamping apparatus, especially
It is that the clamp for machining working as metal cutting uses, and it had both been suitable for the application of machine tool, also is adapted for answering of machining center
With.
The sucker of electric magnet principle has become the standard configuration of many machine tools at present.It is using the difference of different permanent magnet materials
Characteristic, is controlled to the distribution of its inside magnetic circuit by electric-control system and changes so that permanent magnetic field is in internal system itself
Balance, is externally characterized as demagnetization relaxation state, i.e. not suction state, or is discharged into the work magnetic pole strength of electric permanent magnet, to appearance
Levy as the clamped condition that magnetizes, i.e. suction state.Because the electric permanent magnetism coil electricity time is extremely short, there are energy-conserving and environment-protective.But
It is that current electric permanent-magnet suction disc operationally, only relies on the product such as chopper to prevent the electric permanent-magnet suction disc and connecting line from being
Situations such as no appearance short circuit, judgement and the process of fault can not be carried out in advance, and pass through open circuit when short trouble occurs again
Device etc. carries out processing the generation that may cannot be avoided security incident.
Therefore, how to improve the safety in operation of electric permanent-magnet suction disc operation, be that those skilled in the art need to solve at present
Technical problem.
Utility model content
The purpose of this utility model is to provide a kind of electric permanent-magnet suction disc short circuit protection system, can be short to electric permanent-magnet suction disc
Road situation is made and is judged in advance and control, and effectively improves the safety in operation of electric permanent-magnet suction disc operation.
For solving above-mentioned technical problem, this utility model provides following technical scheme:
A kind of electric permanent-magnet suction disc short circuit protection system, comprising:
The current sensor being connected with the magnet exciting coil of electric permanent-magnet suction disc；
The SCR rectification circuit being connected with described current sensor；
It is connected with described SCR rectification circuit, described current sensor and described magnet exciting coil, in described excitation wire
Before circle fills demagnetization action, the described SCR rectification circuit of triggering exports the first predeterminated voltage, and electric current described in real-time reception passes
The first electric current in the described magnet exciting coil of sensor collection, judges described electricity when described first electric current is more than predetermined current threshold
The field coil short circuit condition of permanent magnetic chuck, and stop the controller of the triggering of described SCR rectification circuit.
Preferably, also include the first relay circuit and the second relay circuit being connected with described controller, described
One relay circuit and described second relay circuit enter to described magnet exciting coil for the control signal responding described controller
Row fills demagnetization；Wherein, described current sensor is connected with the first end of described magnet exciting coil, described second relay circuit and institute
State SCR rectification circuit to connect, the second end of described magnet exciting coil is connected with described controller by the first relay circuit.
Preferably, the value of described first predeterminated voltage is not more than 5v.
Preferably, described controller is stm32 single-chip microcomputer.
Preferably, it is provided with triggering test current time control module in described controller, for controlling triggering described controlled
The time that silicon rectification circuit exports the first predeterminated voltage is not more than 10ms.
Preferably, also include the alarm module being connected with described controller, for judging described electricity forever in described controller
During the field coil short circuit condition of magnetic-disc, reported to the police.
Compared with prior art, technique scheme has the advantage that
The electric permanent-magnet suction disc short circuit protection system that this utility model embodiment is provided, comprising: with encouraging of electric permanent-magnet suction disc
The current sensor that magnetic coil connects；The SCR rectification circuit being connected with current sensor；With SCR rectification circuit, electric current
Sensor and magnet exciting coil connect, and before magnet exciting coil fills demagnetization action, triggering SCR rectification circuit output first is pre-
If voltage, and the first electric current in the magnet exciting coil of real-time reception current sensor collection, it is more than predetermined current in the first electric current
Judge the field coil short circuit condition of electric permanent-magnet suction disc during threshold value, and stop the controller of the triggering of SCR rectification circuit.Controller
Before magnet exciting coil fills demagnetization action, triggering SCR rectification circuit exports a voltage, by loading magnet exciting coil, then controls
Device processed is acquired to the electric current in magnet exciting coil by current sensor, when the first electric current is more than predetermined current threshold, sentences
Disconnected load magnet exciting coil there occurs short circuit, has carried out one accurately to the resistance of load magnet exciting coil before filling demagnetization every time
Judge, if magnet exciting coil is abnormal stops triggering exciting current it is achieved that short-circuit conditions protect in advance it is therefore prevented that short-circuit conditions
Generation.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are these
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
The electric permanent-magnet suction disc short circuit protection system structural representation that Fig. 1 is provided by a kind of specific embodiment of this utility model
Figure；
The electric permanent-magnet suction disc short circuit protection system structure that Fig. 2 is provided by this utility model another kind specific embodiment is shown
It is intended to.
Specific embodiment
Core of the present utility model is to provide a kind of electric permanent-magnet suction disc short circuit protection system, can be short to electric permanent-magnet suction disc
Road situation is made and is judged in advance and control, and effectively improves the safety in operation of electric permanent-magnet suction disc operation.
In order that above-mentioned purpose of the present utility model, feature and advantage can become apparent from understandable, right below in conjunction with the accompanying drawings
Specific embodiment of the present utility model is described in detail.
Elaborate detail in order to fully understand this utility model in the following description.But this utility model can
To be implemented different from alternate manner described here with multiple, those skilled in the art can be without prejudice to this utility model intension
In the case of do similar popularization.Therefore this utility model is not limited by following public specific embodiment.
Refer to Fig. 1, the electric permanent-magnet suction disc short-circuit protection system that Fig. 1 is provided by a kind of specific embodiment of this utility model
System structural representation.
A kind of specific embodiment of the present utility model provides a kind of electric permanent-magnet suction disc short circuit protection system, comprising: with
The current sensor 2 that the magnet exciting coil 1 of electric permanent-magnet suction disc connects；The SCR rectification circuit 3 being connected with current sensor 2；With
SCR rectification circuit 3, current sensor 2 and magnet exciting coil 1 connect, and before magnet exciting coil 1 fills demagnetization action, triggering can
Control silicon rectification circuit 3 exports the first electricity in the first predeterminated voltage, and the magnet exciting coil 1 of real-time reception current sensor 2 collection
Stream, judges the field coil short circuit condition of electric permanent-magnet suction disc, and stops silicon controlled rectifier when the first electric current is more than predetermined current threshold
The controller 4 of the triggering of circuit.
Inventor's research finds, existing electric permanent-magnet suction disc place control system does not possess the short-circuit protection of real meaning,
Or relying on the products such as chopper to prevent whether electric permanent-magnet suction disc and line from the faults such as short circuit, such protection has time delay
Protectiveness, when short-circuit conditions occur, can cause the generation of situations such as multistage breaker protector tripping operation or large-area power-cuts, or
It is to cause connection cable or adapter to damage because of the big short circuit current by moment.
In the present embodiment, before magnet exciting coil fills demagnetization action, triggering SCR rectification circuit exports controller
One voltage, so that by loading magnet exciting coil, then controller is acquired to the electric current in magnet exciting coil by current sensor,
When the first electric current of collection is more than predetermined current threshold, judge that load magnet exciting coil there occurs short circuit.To the first electric current with advance
If the comparison of the size of current threshold, before filling demagnetization every time, one is carried out to the resistance of load magnet exciting coil and accurately sentenced
Disconnected, if the first electric current is excessive, the resistance characterizing now load magnet exciting coil is abnormal, occurs in that short-circuit conditions, if magnet exciting coil
The abnormal triggering exciting current that stops is it is achieved that short-circuit conditions protect the generation it is therefore prevented that short-circuit conditions in advance.Therefore, to electricity
The short-circuit conditions of permanent magnetic chuck have been made and have been judged in advance and control, and can effectively improve the operation safety of electric permanent-magnet suction disc operation
Property.
Refer to Fig. 2, the electric permanent-magnet suction disc short-circuit protection that Fig. 2 is provided by this utility model another kind specific embodiment
Circuit system structural representation.
In a kind of embodiment of this utility model, this system is except inclusion current sensor 2, SCR rectification circuit 3
Outside controller 4, also include the first relay circuit 5 and the second relay circuit 6 being connected with controller 4, the first relay
Device circuit 5 and the second relay circuit 6 carry out filling demagnetization to magnet exciting coil 1 for the control signal of response controller 4；Wherein,
Current sensor 2 is connected with first end p-1 of magnet exciting coil 1 (not shown), the second relay circuit 6 and silicon controlled rectifier
Circuit 3 connects, and the second end p+1 of magnet exciting coil 1 is connected with controller 4 by the first relay circuit 5.
Wherein, the first relay circuit and the second relay circuit are as drive circuit.Controller passes through to control first to continue
The contact of appliance circuit and the second relay circuit switches over, and fills demagnetization to control to magnet exciting coil.Therefore, because being control
Device processed controls this two group relays circuit to carry out filling the control of demagnetization, then can accurately control controlled before filling demagnetization action
Silicon rectification circuit exports the first predeterminated voltage, and causes device to prevent the detection electric current in the circuit in whole system excessive
Part damages, and therefore, the first predeterminated voltage is unsuitable excessive, and the value of the first predeterminated voltage is not more than 5v in the present embodiment.Enter one
Step ground, controller is stm32 single-chip microcomputer, and this single-chip microcomputer is built-in with analog-digital converter, is capable of the accurate survey to real-time current
Amount and conversion, to measure the size of electric current, and are compared with predetermined current threshold.Wherein, so-called predetermined current threshold root
Set according to practical situation, can be the Minimum Acceptable Value that staff draws according to short-circuit test etc..
On the basis of above-mentioned embodiment, in a kind of embodiment of this utility model, in controller, it is provided with triggering test
Current time control module, the time for controlling triggering SCR rectification circuit to export the first predeterminated voltage is not more than 10ms.
In the present embodiment, the time control of detection trigger will be controlled in 10ms it is ensured that the shorter detection trigger time, therefore
Will not lengthen and fill the demagnetization time.
Further, this system also includes the alarm module being connected with controller, for judging that electric permanent magnetism is inhaled in controller
During the field coil short circuit condition of disk, reported to the police, to notify staff to be overhauled it is ensured that the reliability of system operation.
In sum, electric permanent-magnet suction disc short circuit protection system provided by the utility model, fills demagnetization in magnet exciting coil dynamic
Before work, export a low pressure, by loading magnet exciting coil, to be then acquired to the electric current in magnet exciting coil, in collection
When first electric current is more than predetermined current threshold, judge that load magnet exciting coil there occurs short circuit.To the first electric current and predetermined current threshold
The comparison of the size of value, has carried out an accurate judgement to the resistance of load magnet exciting coil before filling demagnetization every time, if the
One electric current is excessive, and the resistance characterizing now load magnet exciting coil is abnormal, occurs in that short-circuit conditions, if magnet exciting coil is extremely
Stop triggering exciting current it is achieved that short-circuit conditions protect the generation it is therefore prevented that short-circuit conditions in advance.Therefore, electric permanent magnetism is inhaled
The short-circuit conditions of disk have been made and have been judged in advance and control, and can effectively improve the safety in operation of electric permanent-magnet suction disc operation.
Above this utility model is provided a kind of electric permanent-magnet suction disc short circuit protection system and method to be described in detail.
Specific case used herein is set forth to principle of the present utility model and embodiment, and the explanation of above example is only
It is to be used to help understand this utility model and its core concept.It should be pointed out that coming for those skilled in the art
Say, on the premise of without departing from this utility model principle, this utility model can also be carried out with some improvement and modify, these change
Enter and modification also falls in this utility model scope of the claims.
Claims (6)
1. a kind of electric permanent-magnet suction disc short circuit protection system is it is characterised in that include:
The current sensor being connected with the magnet exciting coil of electric permanent-magnet suction disc；
The SCR rectification circuit being connected with described current sensor；
It is connected with described SCR rectification circuit, described current sensor and described magnet exciting coil, fill in described magnet exciting coil
Before demagnetization action, the described SCR rectification circuit of triggering exports the first predeterminated voltage, and current sensor described in real-time reception
The first electric current in the described magnet exciting coil of collection, judges described electricity permanent magnetism when described first electric current is more than predetermined current threshold
The field coil short circuit condition of sucker, and stop the controller of the triggering of described SCR rectification circuit.
2. system according to claim 1 is it is characterised in that also include the first relay electricity being connected with described controller
Road and the second relay circuit, described first relay circuit and described second relay circuit are used for responding described controller
Control signal carries out filling demagnetization to described magnet exciting coil；Wherein, described current sensor and the first end of described magnet exciting coil connect
Connect, described second relay circuit and described SCR rectification circuit connect, and continue by first in the second end of described magnet exciting coil
Appliance circuit is connected with described controller.
3. system according to claim 2 is it is characterised in that the value of described first predeterminated voltage is not more than 5v.
4. system according to claim 3 is it is characterised in that described controller is stm32 single-chip microcomputer.
5. the system according to any one of Claims 1-4 is it is characterised in that be provided with triggering test electricity in described controller
Stream time control module, the time for controlling the described SCR rectification circuit of triggering to export the first predeterminated voltage is not more than
10ms.
6. system according to claim 5, it is characterised in that also including the alarm module being connected with described controller, is used
When judge the field coil short circuit condition of described electric permanent-magnet suction disc in described controller, reported to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620665239.5U CN205911733U (en) | 2016-06-29 | 2016-06-29 | Electricity permanent -magnetic chuck short circuit protecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620665239.5U CN205911733U (en) | 2016-06-29 | 2016-06-29 | Electricity permanent -magnetic chuck short circuit protecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205911733U true CN205911733U (en) | 2017-01-25 |
Family
ID=57813558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620665239.5U Withdrawn - After Issue CN205911733U (en) | 2016-06-29 | 2016-06-29 | Electricity permanent -magnetic chuck short circuit protecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205911733U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107093885A (en) * | 2016-06-29 | 2017-08-25 | 株洲悍威磁电科技有限公司 | A kind of electric permanent-magnet suction disc short circuit protection system and method |
| CN111128511A (en) * | 2019-12-31 | 2020-05-08 | 中国人民解放军海军工程大学 | Current control device of vessel partition demagnetizing system |
-
2016
- 2016-06-29 CN CN201620665239.5U patent/CN205911733U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107093885A (en) * | 2016-06-29 | 2017-08-25 | 株洲悍威磁电科技有限公司 | A kind of electric permanent-magnet suction disc short circuit protection system and method |
| CN107093885B (en) * | 2016-06-29 | 2020-02-07 | 株洲悍威磁电科技有限公司 | Short-circuit protection system and method for electric permanent magnetic chuck |
| CN111128511A (en) * | 2019-12-31 | 2020-05-08 | 中国人民解放军海军工程大学 | Current control device of vessel partition demagnetizing system |
| CN111128511B (en) * | 2019-12-31 | 2021-04-06 | 中国人民解放军海军工程大学 | Current control device of vessel partition demagnetizing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170125 Effective date of abandoning: 20200207 |
|
| AV01 | Patent right actively abandoned |