CN109241696A - A kind of magnetic latching relay choosing method suitable for improving safety - Google Patents
A kind of magnetic latching relay choosing method suitable for improving safety Download PDFInfo
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- CN109241696A CN109241696A CN201811368412.5A CN201811368412A CN109241696A CN 109241696 A CN109241696 A CN 109241696A CN 201811368412 A CN201811368412 A CN 201811368412A CN 109241696 A CN109241696 A CN 109241696A
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- magnetic latching
- latching relay
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
- G06F30/398—Design verification or optimisation, e.g. using design rule check [DRC], layout versus schematics [LVS] or finite element methods [FEM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
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Abstract
A kind of magnetic latching relay choosing method suitable for improving safety, the fault mode of melting welding is likely to occur for magnetic latching relay, the influence relationship of moment surge current and surge current duration to relay life is opened and closed according to magnetic latching relay contact, carries out the design that spacecraft is impacted with magnetic latching relay Antisurge current.At present, it is only capable of carrying out relay selection design by component handbook, but part relay model Antisurge current value is only provided in component handbook, not yet explicitly influence of the energy to relay safety caused by surge current and surge current duration, relay select design to there is design or deficient a possibility that designing.Relative to existing design method, the method for the present invention more quantifies, confidence level is higher, has more operability, has good application value.
Description
Technical field
The invention belongs to spacecraft electrical design fields, are related to a kind of sieve suitable for improving magnetic latching relay safety
Choosing method.
Background technique
Magnetic latching relay is widely used to multiple spacecraft fields such as manned space flight, remote sensing, navigation and deep space exploration.
Magnetic latching relay quantity used in single spacecraft is also more, more than 1000, to the normal work shadow of spacecraft
Sound is very big.
According to incompletely statistics, successively there is the problem of relay contact melting welding in domestic multiple spacecraft models, to boat
The reliability and development progress of its device cause biggish negative effect.Through failure analysis, the relay for melting welding occur is most of
It is to cause contact that transient state arc erosion occurs and melting welding failure occurs due to electrical over-stress.
Currently, being only capable of carrying out relay selection design work by component handbook, but only gived in component handbook
The Antisurge current value of part relay model, and not yet explicitly energy pair caused by surge current and surge current duration
The influence of relay safety, the selection design of relay there are problems that designing or owing design.
Summary of the invention
Technical problem solved by the present invention is having overcome the deficiencies of the prior art and provide a kind of suitable for improving safety
Magnetic latching relay choosing method, by introducing relay actual current and duration parameters and being calculated, so that boat
The design choosing method of its device magnetic latching relay more quantifies, confidence level is higher, has more operability, has good
Engineering application value.
The technical solution of the invention is as follows: a kind of magnetic latching relay choosing method suitable for improving safety, packet
Include following steps:
(1) it is specified to determine that magnetic latching relay provides in the steady-state current of institute application, foundation component handbook
Current parameters and the requirement of the drop volume of institute application, primarily determine candidate magnetic latching relay；
(2) according to magnetic latching relay institute application, the arcing time t of the candidate magnetic latching relay is determined；
(3) the arcing time t obtained using step (2) determines the arcing energy Q of the candidate magnetic latching relay1；
(4) the candidate magnetic latching relay contact safety energy criterion Q is calculated2, method particularly includes:
Q2=A (KIrate)2×10-3
In formula: A is safety coefficient, and value range is between 0~6, and K is temperature coefficient, value range 1,2,3 or 4,
IrateFor the candidate magnetic latching relay single contact rated current；
(5) Q1And Q2Size, if meeting Q1No more than Q2, then it is assumed that candidate magnetic latching relay can select
With；Otherwise, return step (1) reselects the model of candidate magnetic latching relay, until candidate magnetic latching relay can select
Until.
The determination method of margin A in the step (4) are as follows: aerospace occasion is 0.8~1.2, military vehicle, warship
Shipyard is combined into 2~2.2, and weapons and ammunitions occasion is 3~3.6, industrial equipment occasion is 3.6~4.5, other equipment be 5.0~
6.0。
The determination method of temperature COEFFICIENT K in the step (4) are as follows: be 4,36 DEG C for K within the scope of 15 DEG C~35 DEG C of temperature
K is that K is 2 within the scope of 3,56 DEG C~75 DEG C within the scope of~55 DEG C, and K is 1 when being greater than 75 DEG C.
The determination method of the arcing time t of candidate magnetic latching relay in the step (2) are as follows:
T=t2-t1
Wherein, t1For contact striking start time, t2For the contact closure moment.
The arcing energy Q of candidate magnetic latching relay in the step (3)1Determination method are as follows:
Q1=∫tidt
Wherein, for i by the current value that magnetic latching relay contact passes through during arcing, t is the arcing time.
The advantages of the present invention over the prior art are that:
(1) the method for the present invention is likely to occur the fault mode of melting welding for magnetic latching relay, real by introducing relay
Border electric current and duration parameters are simultaneously calculated, and judge the safety of relay contact and reliable with the quantized value of arcing energy
Property；
(2) the method for the present invention specifies have more respectively for relays different applications such as space flight, aviation, weapons
Safety coefficient is targetedly selected, can get the choosing method for improving relay safety under different application；
(3) the method for the present invention proposes temperature to the Quantitative Calculation Method of relay safety effects, specifies not equality of temperature
Lower safety coefficient is spent, can get the choosing method that relay improves relay safety under locating actual application environment.
Detailed description of the invention
Fig. 1 is magnetic latching relay arcing time schematic diagram of the present invention.
Specific embodiment
Below with reference to embodiment, the choosing method of magnetic latching relay of the present invention is further explained.This hair
Credit rating, structure type and the contact form etc. that bright method passes through fixed magnetic latching relay influence the inherence of relay safety
Factor is carried out relay and is selected, specific steps are such as by introducing relay actual current and duration parameters and being calculated
Under:
Relay actual current is the transient current that relay contact actually passes through in closure or breaking course.When continuing
Between then comprising metal phase arcing time and gas phase arcing time.Metal phase arcing time and gas phase caused by different slider materials
Arcing time is different, and the present invention is by the sum of metal phase arcing time and gas phase arcing time, i.e., total arcing time is as calculating ginseng
Number.
1) the arcing time t of magnetic latching relay is calculated, calculation method is shown in formula (1)；
T=t2-t1………………….……………………(1)
Wherein, t1For contact striking start time, t2For the contact closure moment.
The magnetic latching relay arcing time is until playing the arc extinction moment from the relay contact generation electric arc moment
Time, therefore the arcing time is one of the important feature parameter in current waveform.As shown in Figure 1, illustrating for the relay arcing time
Figure.Wherein, t1To t3For metal phase arcing time, t3To t2For the gas phase arcing time, t is then total arcing time.Metal phase arcing
Time increases with closed path and is increased, and will gradually tend to be saturated, and the gas phase arcing time increases with closed path and increased.Gold
The symbolic animal of the birth year arcing time mainly plays a major role in low current.When a current increases, the gas phase arcing time occupies an leading position.
2) the arcing energy Q of magnetic latching relay is calculated1, calculation method is shown in formula (2)；
Q1=∫tidt…………….……………………(2)
Wherein, the current value that i is passed through by relay contact during arcing, t are the arcing time.
Magnetic latching relay arcing energy is the direct factor for determining contact burning severity, is to influence relay safety
One of the important feature parameter of property.
3) corresponding magnetic latching relay contact safety energy criterion Q is calculated2, calculation method is shown in formula (3)；
Q2=A (KIrate)2×10-3……………….…………(3)
In formula: A is safety coefficient；
K is temperature coefficient；
IrateFor relay single contact rated current.
Margin A required for needing exist for the magnetic latching relay according to used in occasion determination, it is generally the case that
Aerospace occasion is 0.8~1.2, military vehicle, naval vessel occasion are 2~2.2, and weapons and ammunitions occasion is that 3~3.6, industry is set
Standby occasion is 3.6~4.5, and other equipment are 5.0~6.0.
And for temperature coefficient K, K is that K is 3 within the scope of 4,36 DEG C~55 DEG C within the scope of 15 DEG C~35 DEG C, 56 DEG C~75 DEG C
K is 2 in range, and K is 1 when being greater than 75 DEG C.
Arc energy is that arc power integrates within the arcing time as a result, according to magnetic latching relay use occasion and making
With environment, relay arcing energy is implemented to different degrees of drop volume, is the energy Q generated in 1ms with the unit time2As peace
Full sex determination standard.It is increased with temperature, under the influence of not considering heating region boundary pressure in capsul, the arcing time will
Increase therewith.
4) compare the size of magnetic latching relay characteristic parameter Q1 and Q2, if meeting Q1 no more than Q2, then it is assumed that relay
Design rationally, can select the magnetic latching relay of corresponding model；Otherwise, the model of magnetic latching relay should be reselected, directly
Until meeting design condition.
It should be noted that the method for the present invention is the energy for calculating contact and generating in disconnection or Contact, it is only applicable to
The fault mode of contact melted is not suitable for other fault modes.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (5)
1. a kind of magnetic latching relay choosing method suitable for improving safety, it is characterised in that include the following steps:
(1) magnetic latching relay is determined in the steady-state current of institute application, according to the rated current provided in component handbook
The requirement of the drop volume of parameter and institute application, primarily determines candidate magnetic latching relay；
(2) according to magnetic latching relay institute application, the arcing time t of the candidate magnetic latching relay is determined；
(3) the arcing time t obtained using step (2) determines the arcing energy Q of the candidate magnetic latching relay1；
(4) the candidate magnetic latching relay contact safety energy criterion Q is calculated2, method particularly includes:
Q2=A (KIrate)2×10-3
In formula: A is safety coefficient, and for value range between 0~6, K is temperature coefficient, value range 1,2,3 or 4, IrateFor
Candidate's magnetic latching relay single contact rated current；
(5) Q1And Q2Size, if meeting Q1No more than Q2, then it is assumed that candidate magnetic latching relay can be selected；It is no
Then, return step (1) reselects the model of candidate magnetic latching relay, until candidate magnetic latching relay can be selected and be
Only.
2. a kind of magnetic latching relay choosing method suitable for improving safety according to claim 1, feature exist
In: the determination method of margin A in the step (4) are as follows: aerospace occasion is 0.8~1.2, military vehicle, naval vessel field
2~2.2 are combined into, weapons and ammunitions occasion is 3~3.6, industrial equipment occasion is 3.6~4.5, and other equipment are 5.0~6.0.
3. a kind of magnetic latching relay choosing method suitable for improving safety according to claim 1, feature exist
In: the determination method of temperature COEFFICIENT K in the step (4) are as follows: be 4,36 DEG C~55 DEG C for K within the scope of 15 DEG C~35 DEG C of temperature
K is that K is 2 within the scope of 3,56 DEG C~75 DEG C in range, and K is 1 when being greater than 75 DEG C.
4. a kind of magnetic latching relay choosing method suitable for improving safety according to claim 1 or 2 or 3,
It is characterized in that: the determination method of the arcing time t of candidate magnetic latching relay in the step (2) are as follows:
T=t2-t1
Wherein, t1For contact striking start time, t2For the contact closure moment.
5. a kind of magnetic latching relay choosing method suitable for improving safety according to claim 1 or 2 or 3,
It is characterized in that: the arcing energy Q of candidate magnetic latching relay in the step (3)1Determination method are as follows:
Q1=∫tidt
Wherein, for i by the current value that magnetic latching relay contact passes through during arcing, t is the arcing time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368412.5A CN109241696B (en) | 2018-11-16 | 2018-11-16 | Magnetic latching relay selection method suitable for improving safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368412.5A CN109241696B (en) | 2018-11-16 | 2018-11-16 | Magnetic latching relay selection method suitable for improving safety |
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|---|---|
| CN109241696A true CN109241696A (en) | 2019-01-18 |
| CN109241696B CN109241696B (en) | 2022-10-21 |
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| CN201811368412.5A Active CN109241696B (en) | 2018-11-16 | 2018-11-16 | Magnetic latching relay selection method suitable for improving safety |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060114635A1 (en) * | 2004-11-30 | 2006-06-01 | Robertshaw Controls Company | Method of detecting and correcting relay tack weld failures |
| CN107703444A (en) * | 2017-09-08 | 2018-02-16 | 北京空间飞行器总体设计部 | A kind of acquisition methods of magnetic latching relay surge current safety curve |
-
2018
- 2018-11-16 CN CN201811368412.5A patent/CN109241696B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060114635A1 (en) * | 2004-11-30 | 2006-06-01 | Robertshaw Controls Company | Method of detecting and correcting relay tack weld failures |
| CN107703444A (en) * | 2017-09-08 | 2018-02-16 | 北京空间飞行器总体设计部 | A kind of acquisition methods of magnetic latching relay surge current safety curve |
Non-Patent Citations (1)
| Title |
|---|
| 陈昊等: "极化继电器模拟容性负载试验电路设计与研究", 《电器与能效管理技术》 * |
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| CN109241696B (en) | 2022-10-21 |
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