CN107332210B - A kind of processing method obtaining essential safety equivalent inductance - Google Patents
A kind of processing method obtaining essential safety equivalent inductance Download PDFInfo
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- CN107332210B CN107332210B CN201710412868.6A CN201710412868A CN107332210B CN 107332210 B CN107332210 B CN 107332210B CN 201710412868 A CN201710412868 A CN 201710412868A CN 107332210 B CN107332210 B CN 107332210B
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- inductance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
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Abstract
The application provides a kind of processing method for obtaining essential safety equivalent inductance, which comprises determines first essential safety inductance value of the inductance to be processed under its working condition；By the first essential safety inductance value divided by preset safety coefficient, the second essential safety inductance value is calculated；By the initial inductance value of inductance to be processed divided by the second essential safety inductance value, numerical value M is calculated, carries out rounding operation, obtains Integer N；To initial inductance value, the product of N Yu the second essential safety inductance value are subtracted, obtains supplement inductance value；By the supplement inductance, divides inductance to connect for the second essential safety inductance value with N number of inductance value, form equivalent inductance；One diode of both ends reverse parallel connection of inductance is divided to obtain essential safety inductance in one diode of both ends reverse parallel connection of the equivalent inductance with each described in the supplement inductance.Using embodiment each in the application, the higher essential safety inductance of essential safety performance can be obtained.
Description
Technical field
This application involves intrinsicallysafecircuit technical field, in particular to a kind of processing for obtaining essential safety equivalent inductance
Method.
Background technique
Applied to the intrinsicallysafecircuit of explosive gas atmosphere, by GB3836.4-2000 standard is defined as: in this standard
Any electric spark or any fuel factor generated under rated condition (including working normally and defined fault condition) cannot point
The circuit of explosive gas atmosphere as defined in firing, specific manifestation are as follows: on IEC (International Electrotechnical Commission) spark test apparatus
The detection test of rated condition is carried out, lighting in the case of three kinds of short circuit, open circuit and ground connection occurs in any one of circuit
Defined explosive gas.
It is in the prior art in the both ends inverse parallel of energy-storage travelling wave tube inductance to the method for limiting of inductive circuit open circuit spark energy
Diode.When normal work, the diode is not turned on.When the circuit where inductance is opened a way, the diode can be led
It is logical, shunting function is played, exhausts induced current in shunting circuit, avoids generating spark at open circuit.
But in the prior art, it opens a way if it is inductance inside, diode can not then be shunted.Inductance produces
Raw induced voltage acts at open circuit, and spark can be generated at open circuit.That is, in the prior art, even reversely simultaneously
Diode is joined, can not also avoid the generation of open circuit spark completely, inductive circuit essential safety performance in the prior art is lower.
At least there are the following problems in the prior art: in the prior art, opening a way if it is inductance inside, diode is then
It can not be shunted.The induced voltage that inductance generates acts at open circuit, and spark can be generated at open circuit.That is, existing
In technology, even reverse parallel connection diode, also can not avoid the generation of open circuit spark completely, inductance in the prior art without
Method reaches the standard of essential safety.
Summary of the invention
The purpose of the embodiment of the present application is to provide a kind of processing method for obtaining essential safety equivalent inductance, to obtain one kind
Essential safety inductance.
The processing method that the embodiment of the present application provides a kind of acquisition essential safety equivalent inductance is achieved in that
A kind of processing method obtaining essential safety equivalent inductance, which comprises
Determine first essential safety inductance value of the inductance to be processed under its working condition；
By the first essential safety inductance value divided by preset safety coefficient, the second essential safety inductance is calculated
Value；
By the initial inductance value of the inductance to be processed divided by the second essential safety inductance value, numerical value M is calculated,
Rounding operation is carried out to the numerical value M, obtains Integer N；
To the initial inductance value, the product of the Integer N Yu the second essential safety inductance value is subtracted, is supplemented
Inductance value；
By the supplement inductance, divides inductance to connect equal to the second essential safety inductance value with N number of inductance value, form
Equivalent inductance；
In one diode of both ends reverse parallel connection of the supplement inductance, in each both ends reverse parallel connection for dividing inductance
One diode obtains essential safety equivalent inductance in one diode of both ends reverse parallel connection of the equivalent inductance.
In preferred embodiment, the side of first essential safety inductance value of the determination inductance to be processed under its working condition
Formula, comprising:
According to the operating voltage and operating current of circuit where the inductance to be processed, inquiry minimum lights curve, determines
The first essential safety inductance value out.
Using a kind of processing method for obtaining essential safety equivalent inductance provided by the embodiments of the present application, can use multiple
Divide inductance and supplement inductance, equivalent inductance to be processed.The multiple point of inductance and supplement inductance series connection, inductance value with wait locate
It is equal to manage inductance, can satisfy job requirement.In addition, since each point of inductance and supplement inductance reverse parallel connection have diode,
When it is described divide inside inductance or supplement inductance open a way when, the diode at the internal inductance both ends opened a way can not divide
Stream.But inductance value on curve is lighted since inductance value is less than minimum, the spark energy of generation cannot generate explosion, and remaining
The antiparallel diode of inductance still there is shunting function, spark will not be generated at open circuit.In this way, just having obtained inductance value
The essential safety equivalent inductance equal with the inductance value of inductance to be processed.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of method stream of the processing method for acquisition essential safety equivalent inductance that the application one embodiment provides
Cheng Tu；
Fig. 2 (a) is the inductance to be processed in the application one embodiment；
Fig. 2 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 2 (a)
The circuit diagram of inductance；
Fig. 3 is that a kind of essence for obtain after equivalent process to the inductance to be processed in the application one embodiment is pacified
The circuit diagram of full equivalent inductance；
Fig. 4 (a) is the inductance to be processed in one example of the application；
Fig. 4 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 4 (a)
The circuit diagram of inductance；
Fig. 5 (a) is the inductance to be processed in another example of the application；
Fig. 5 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 5 (a)
The circuit diagram of inductance；
Fig. 6 (a) is the inductance to be processed in another example of the application；
Fig. 6 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 6 (a)
The circuit diagram of inductance.
Specific embodiment
The embodiment of the present application provides a kind of processing method for obtaining essential safety equivalent inductance.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without creative efforts
Range.
Fig. 1 is a kind of a kind of herein described method flow of embodiment of processing method for obtaining essential safety equivalent inductance
Figure.Although this application provides as the following examples or method operating procedure shown in the drawings or apparatus structure, based on conventional
It either may include more or less operating procedure or module list in the method or device without creative labor
Member.In the step of there is no necessary causalities in logicality or structure, the execution sequence of these steps or the module of device
Structure is not limited to the embodiment of the present application or execution shown in the drawings sequence or modular structure.The method or modular structure
Device or end product in practice according to embodiment or method shown in the drawings or modular structure in application, can carry out suitable
Sequence execute or it is parallel execute (such as parallel processor or multiple threads environment, even include distributed treatment reality
Apply environment).
It is specific as described in Figure 1, a kind of one kind for the processing method obtaining essential safety equivalent inductance provided by the present application
Embodiment may include:
S1: first essential safety inductance value of the inductance to be processed under its working condition is determined.
Wherein, the mode of first essential safety inductance value of the determination inductance to be processed under its working condition, can be with
Include:
According to the operating voltage and operating current of circuit where the inductance to be processed, inquiry minimum lights curve, determines
The first essential safety inductance value out.
S2: by the first essential safety inductance value divided by preset safety coefficient, the second essential safety electricity is calculated
Inductance value.
S3: by the initial inductance value of the inductance to be processed divided by the second essential safety inductance value, number is calculated
Value M carries out rounding operation to the numerical value M, obtains Integer N.
S4: to the initial inductance value, the product of the Integer N Yu the second essential safety inductance value is subtracted, is obtained
Supplement inductance value.
S5: by the supplement inductance, dividing inductance to connect with N number of inductance value equal to the second essential safety inductance value,
Form equivalent inductance.
S6: reversed at each both ends for dividing inductance in one diode of both ends reverse parallel connection of the supplement inductance
A diode in parallel obtains essential safety equivalent inductance in one diode of both ends reverse parallel connection of the equivalent inductance.
Fig. 2 (a) is the inductance to be processed in the application one embodiment.
Fig. 2 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 2 (a)
The circuit diagram of inductance.
In this example, by inquire minimun burning current curves, determine the inductance to be processed the first essential safety
Inductance value is L'.
Then, it after considering safety coefficient k=1.5, by the first essential safety inductance value divided by safety coefficient k, calculates
Obtaining the second essential safety inductance value is L "=L'/k.
Divide the number of inductance and round numbers described in being connected afterwards again, obtains Integer n.
Finally obtain a supplement inductance, inductance value L0=L-n*L ".
The inductance to be processed is divided into the inductance and a supplement inductance L of n L "0.So n anti-paralleled diode and
The inductance and a supplement inductance series connection that inductance value is L " can reach the functional requirement of primary circuit and ensure that circuit is essence
Safety.
Fig. 3 is that a kind of essence for obtain after equivalent process to the inductance to be processed in the application one embodiment is pacified
The circuit diagram of full equivalent inductance.
By taking n=2 as an example, the beneficial effect of the application is illustrated, as shown in Figure 3:
(1) when inductance external circuit is opened a way, small inductor L1, L2 are limited by diode D1, D2, D3 shunting function
The energy of open circuit spark.
(2) when opening a way at the series wiring of two small inductors L1, L2, diode D3 loses the effect of shunting.
L1, L2 pass through the shunting function of D1, D2 respectively to limit the energy of open circuit spark.
(3) when opening a way inside inductance L1, diode D1 and D3 lose the effect of shunting, and diode D2 can be right
Inductance L2 shunting, therefore limit the energy of L2 and the energy of L1 open-circuit spark contribution can not be limited.But due to inductance L1
Inductance value be less than minimum and light inductance value on curve, the energy of the spark of formation is not sufficient to ignite explosive gas, institute
With still safe.
(4) similarly, when opening a way inside inductance L2, and safety.
Therefore, when inductance external circuit open circuit or inductance inside open circuit occur for the circuit for having inductance, the present invention is utilized
The inductance of offer may ensure that circuit is essential safety.
Fig. 4 (a) is the inductance to be processed in one example of the application.
As shown in Fig. 4 (a), the operating voltage of circuit is 22V, and operating current 0.2A, the inductance value of inductance is 30mH.This
Inductance value is not essential safety under this operating voltage and operating current.Now according to operating voltage and operating current, this is found
The safe inductance value of matter is 24mH, takes inductance value for 16mH after increasing safety coefficient.
Fig. 4 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 4 (a)
The circuit diagram of inductance.
As shown in Fig. 4 (b), the inductance of the inductance of 16mH and a 14mH distinguish anti-paralleled diode, then go here and there again
Connection can reach the functional requirement of primary circuit, and also ensure that circuit is essential safety.
Fig. 5 (a) is the inductance to be processed in another example of the application.
As shown in Fig. 5 (a), the operating voltage of circuit is 20V, and operating current 0.3A, the inductance value of inductance is 20mH.This
Inductance value is not essential safety under this operating voltage and operating current.Now according to operating voltage and operating current, this is found
The safe inductance value of matter is 12mH, takes inductance value for 8mH after increasing safety coefficient.
Fig. 5 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 5 (a)
The circuit diagram of inductance.
As shown in Fig. 5 (b), the inductance of the inductance of two 8mH and a 4mH distinguish anti-paralleled diode, then connect again
The functional requirement of primary circuit can be reached, and also ensure that circuit is essential safety.
Fig. 6 (a) is the inductance to be processed in another example of the application.
As shown in Fig. 6 (a), the operating voltage of circuit is 24V, operating current 0.18A, inductance value 100mH.This inductance
Value is not essential safety under this operating voltage and operating current.Now according to operating voltage and operating current, essential peace is found
Full inductance value is 30mH, takes inductance value for 20mH after increasing safety coefficient.
Fig. 6 (b) is equivalent to a kind of essential safety obtained after the progress equivalent process of inductance to be processed described in Fig. 6 (a)
The circuit diagram of inductance.
As shown in Fig. 6 (b), the 20mH inductance series connection of 5 anti-paralleled diodes can reach the functional requirement of primary circuit, and
And also ensure that circuit is essential safety.
It, can using a kind of embodiment of the processing method of acquisition essential safety equivalent inductance of the various embodiments described above offer
To utilize multiple points of inductance and supplement inductance, equivalent inductance to be processed.The multiple point of inductance and supplement inductance series connection, electricity
Inductance value is equal with inductance to be processed, can satisfy job requirement.In addition, due to each point of inductance and supplement inductance reverse parallel connection
Have diode, when it is described divide inside inductance or supplement inductance open a way when, two poles at the internal inductance both ends opened a way
Pipe can not shunt.But since inductance value is less than the minimum inductance value lighted on curve, the spark energy of generation cannot generate quick-fried
It is fried, and the antiparallel diode of remaining inductance still has shunting function, and spark will not be generated at open circuit.In this way, must
The inductance value essential safety equivalent inductance equal with the inductance value of inductance to be processed is arrived.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive
The means for the property made may include more or less operating procedure.The step of enumerating in embodiment sequence is only numerous steps
One of execution sequence mode, does not represent and unique executes sequence.It, can when device or client production in practice executes
To execute or parallel execute (such as at parallel processor or multithreading according to embodiment or method shown in the drawings sequence
The environment of reason, even distributed data processing environment).The terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, product or equipment including a series of elements are not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, product or equipment
Intrinsic element.In the absence of more restrictions, be not precluded include the process, method of the element, product or
There is also other identical or equivalent elements in person's equipment.
Each embodiment in this specification is described in a progressive manner, the same or similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application's
Spirit.
Claims (1)
1. a kind of processing method for obtaining essential safety equivalent inductance, which is characterized in that the described method includes:
According to the operating voltage and operating current of circuit where inductance to be processed, inquiry minimum lights curve, determines first
The safe inductance value of matter；
By the first essential safety inductance value divided by preset safety coefficient, the second essential safety inductance value is calculated；
By the initial inductance value of the inductance to be processed divided by the second essential safety inductance value, numerical value M is calculated, to institute
It states numerical value M and carries out rounding operation, obtain Integer N；
To the initial inductance value, the product of the Integer N Yu the second essential safety inductance value is subtracted, obtains supplement inductance
Value；
By the supplement inductance, divides inductance to connect equal to the second essential safety inductance value with N number of inductance value, form equivalent
Inductance；
In one diode of both ends reverse parallel connection of the supplement inductance, in each both ends reverse parallel connection for dividing inductance one
Diode obtains essential safety equivalent inductance in one diode of both ends reverse parallel connection of the equivalent inductance.
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| CN108092504B (en) * | 2017-12-07 | 2021-04-30 | 中电普瑞科技有限公司 | Parameter determination method and device for Buck circuit |
| CN109167508A (en) * | 2018-11-05 | 2019-01-08 | 郑州煤机液压电控有限公司 | Has the Mine-used I. S power supply for eliminating spark energy |
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| SU777240A1 (en) * | 1975-11-26 | 1980-11-07 | Научно-Производственное Объединение "Автоматгормаш" Министерства Угольной Промышленности Ссср | Method of estimating spark safety of inductive load with diode shunt |
| CN2130303Y (en) * | 1992-09-29 | 1993-04-21 | 张介轩 | High-voltage inverter |
| CN103887787B (en) * | 2014-01-29 | 2016-08-17 | 北方工业大学 | Arc extinguishing method of intrinsically safe inductive circuit |
| US9853680B2 (en) * | 2014-06-12 | 2017-12-26 | Skyworks Solutions, Inc. | Circuits and methods related to adjustable compensation for parasitic effects in radio-frequency switch networks |
| CN104410059B (en) * | 2014-11-27 | 2017-03-22 | 北方工业大学 | Discharge gap arc extinguishing method of intrinsically safe inductive circuit |
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Denomination of invention: A method for obtaining intrinsically safe equivalent inductance Effective date of registration: 20220616 Granted publication date: 20190115 Pledgee: China Construction Bank Co.,Ltd. Loudi branch Pledgor: LOUDI HONGSHEN TECHNOLOGY Co.,Ltd. Registration number: Y2022980007898 |
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