CN107785209B - Relay contact deoxidation module and method - Google Patents
Relay contact deoxidation module and method Download PDFInfo
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- CN107785209B CN107785209B CN201711181541.9A CN201711181541A CN107785209B CN 107785209 B CN107785209 B CN 107785209B CN 201711181541 A CN201711181541 A CN 201711181541A CN 107785209 B CN107785209 B CN 107785209B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
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Abstract
The invention discloses relay contact deoxidation module and methods, are related to relay technical field.The present invention provides a kind of relay contact deoxidation module, and including power supply unit, switch unit and charge/discharge unit, power supply unit is electrically connected with switch unit, and switch unit is electrically connected with charge/discharge unit.Power supply unit is used to be electrically connected with the both ends of two contacts of relay, selectively to power and make two contacts of relay to be electrically connected to relay.Charge/discharge unit is used for two contact portions or the disconnection that make relay by switch unit.The present invention also provides a kind of relay contact deoxidation methods implemented using relay contact deoxidation module.Relay contact deoxidation module and method provided by the invention can carry out deoxidation to relay contact, reduce contact resistance, improve the overall performance of relay.
Description
Technical field
The present invention relates to relay technical field, in particular to relay contact deoxidation module and method.
Background technology
This part intends to provides background for the embodiments of the present invention stated in claims and specific embodiment
Or context.Description herein recognizes it is the prior art not because not being included in this part.
With the rapid development and the improvement of people's living standards of industrial automation, relay is in various household electrical appliance
Dosage increases considerably.With the expansion of application and the raising of production technology, relay technology is also more ripe.Relay at present
It is broadly divided into four major class：Electromagnetic relay, reed relay, solid-state relay and hybrid relay.Electromagnetic relay is with it
The advantages that at low cost, anti-electromagnetic interference capability is strong, technology maturation occupies most of market.But since the contact of electromagnetic relay is
Silver contact, and easily oxidation forms layer oxide film to silver in contact surface in air, even if strong using other oxidation resistances
Silver alloy as slider material but for a long time or oxidation film can be generated.Silver is acted on the sulfide in air, is also easy to produce black
Color silver sulfide.Relay contact oxidation film can increase the contact resistance of contact, the resistance square with the electricity by contact
The product of stream consumes power for contact, under kindred circumstances, by electric current it is bigger, the power of consumption is bigger, and electric shock temperature is higher, temperature
Degree raising promotes contact more to aoxidize again.Contact oxidation causes relay contact electric conductivity to be deteriorated, and seriously affects circuit function,
And relay overall performance declines and generates high heat.So relay contact deoxidation is particularly important.
Existing relay contact deoxidation turns to：Polishing contact, chemical mordant cleaning contact oxidation object, electric spark destroy
Or removal contact surface oxidation film.But the contact of general relay is smaller, it is difficult to dismantle, so first two method cannot be transported actually
With.And use existing electric spark method relay must be taken off carry out contact electric spark deoxidation operation, it is single after
The operation of electrical appliances time is long, efficiency is low.
Invention content
The purpose of the present invention is to provide a kind of relay contact deoxidation modules, and relay contact can be gone
Oxidation reduces contact resistance, improves the overall performance of relay.
Another object of the present invention is to provide a kind of relay contact deoxidation method, can to relay contact into
Row deoxidation reduces contact resistance, improves the overall performance of relay.
The present invention provides a kind of technical solution：
A kind of relay contact deoxidation module, for removing the oxidation film of the contact surface of relay.Relay contact
Deoxidation module includes power supply unit, switch unit and charge/discharge unit, and power supply unit is electrically connected with switch unit, and switch is single
Member is electrically connected with charge/discharge unit.Power supply unit is used to be electrically connected with the both ends of two contacts of relay, with selectivity
Ground powers to relay and is electrically connected two contacts of relay.Charge/discharge unit is used to make relay by switch unit
Two contact portions or disconnection.
Further, above-mentioned power supply unit includes power supply source and first resistor, and power supply source is electrically connected with first resistor, the
Both ends of the both ends of one resistance respectively with two contacts of relay are connect, and the one end of first resistor far from power supply source is single with switch
Member is electrically connected.
Further, above-mentioned switch unit includes at least one capacitance, and one end and the first resistor of capacitance are electrically connected, electricity
The other end ground connection of appearance.
Further, above-mentioned switch unit includes multiple capacitances, and multiple capacitances are electrically connected in parallel, and one end of capacitance
It is electrically connected with first resistor, the other end ground connection of capacitance.
Further, above-mentioned charge/discharge unit includes switch and second resistance, one end and the separate power supply of relay of switch
The one end in source is electrically connected, and the other end of switch and one end of second resistance connect, the other end ground connection of second resistance.
Further, above-mentioned relay contact deoxidation module further includes detection control unit, detection control unit and electricity
Hold be electrically connected, with detect the voltage of capacitance and generate characterization capacitance voltage information voltage signal, detection control unit according to
Voltage signal selectively controls power supply source to open.
Further, above-mentioned relay contact deoxidation module further includes oxidation detection unit, and oxidation detection unit includes
Sampling unit and processing unit, sampling unit are electrically connected with processing unit, and processing unit is electrically connected with power supply unit.Relay
Device includes the first stationary contact and the second stationary contact that can be electrically connected with each other, sampling unit for respectively with the first stationary contact and
Second stationary contact is electrically connected and obtains the first voltage of the first stationary contact and the second voltage of the second stationary contact.Sampling unit is also
For obtaining the voltage difference of the first stationary contact and the second stationary contact according to first voltage and second voltage and being transmitted to voltage difference
Processing unit.Processing unit is according to the contact resistance between voltage difference the first stationary contact of calculating and the second stationary contact and according to contact
Resistance generation control signal, processing unit are additionally operable to control signal transmission to power supply unit.Power supply unit is additionally operable to according to control
Signal processed is turned on and off.
A kind of relay contact deoxidation method, using relay contact deoxidation module.Relay contact deoxidation mould
Block includes power supply unit, switch unit and charge/discharge unit, and power supply unit is electrically connected with switch unit, switch unit and charge and discharge
Electric unit is electrically connected.Power supply unit is used to be electrically connected with the both ends of two contacts of relay, with selectively to relay
Device powers and is electrically connected two contacts of relay.Charge/discharge unit is used to make two of relay to touch by switch unit
Point connects or disconnects.Relay contact deoxidation method includes：The voltage of regulating relay makes to send out between movable contact and stationary contact
It is raw to hit.Changing the voltage of relay makes to detach between movable contact and stationary contact.
Compared with prior art, the advantageous effect of relay contact deoxidation module and method provided by the invention is：
The contact of relay using easily aoxidizing, can form one layer of oxidation on the surface of contact in air after oxidation
Film.Oxidation film on contact can increase contact resistance, and then influence the working performance of relay.The present embodiment using movable contact and
Stationary contact in cooperation between shock remove the oxidation film on contact.Power supply unit is used to supply two contacts of relay
Electricity, so that stationary contact is hit with movable contact when connecting.Charge/discharge unit is used for switch unit charge or discharge, so that relay
Device is closed or disconnects, and then removes the oxidation film on contact.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range.It for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structure diagram of relay contact deoxidation module that the first embodiment of the present invention provides.
Fig. 2 is the electrical block diagram of relay contact deoxidation module that the first embodiment of the present invention provides.
Fig. 3 is the structure diagram of relay contact deoxidation module that the second embodiment of the present invention provides.
Fig. 4 is the structure diagram of the sampling unit that the second embodiment of the present invention provides and processing unit.
Fig. 5 is the electrical block diagram of sampling unit that the second embodiment of the present invention provides.
Icon：10- relay contact deoxidation modules；100- power supply units；110- first resistors；200- switch units；
210- capacitances；300- charge/discharge units；310- is switched；320- second resistances；400- aoxidizes detection unit；410- processing units；
411- electric current read modules；412- computing modules；413- communication modules；420- sampling units；The first sampling modules of 421-；
4211- 3rd resistors；The 4th resistance of 4212-；4213- first voltage comparators；The second sampling modules of 422-；The 5th electricity of 4221-
Resistance；The 6th resistance of 4222-；4223- second voltage comparators；423- voltage difference computing modules；The 7th resistance of 4231-；4232-
Eight resistance；The 9th resistance of 4233-；The tenth resistance of 4234-；4235- tertiary voltage comparators.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be configured to arrange and design with a variety of different.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiments obtained without creative efforts belong to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that the instructions such as term " on ", " under ", " interior ", " outer ", "left", "right"
Orientation or position relationship be based on orientation shown in the drawings or position relationship or the invention product using when usually put
Orientation or the orientation that usually understands of position relationship or those skilled in the art or position relationship, be for only for ease of and retouch
It states the present invention and simplifies description rather than instruction or imply that signified equipment or element must have specific orientation, with specific
Azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relatively important
Property.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, " setting ", " even
Connect " etc. terms should be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected or integrally connect
It connects；Can be mechanical connection or electrical connection；Can be directly connected to, can also be indirectly connected with by intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in the present invention.
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail.
First embodiment
Referring to Fig. 1, a kind of relay contact deoxidation module 10 is present embodiments provided, for removing touching for relay
The oxidation film on point surface.Relay contact deoxidation module 10 provided in this embodiment can deoxygenate relay contact
Change, reduce contact resistance, improve the overall performance of relay.
Relay contact deoxidation module 10 provided in this embodiment includes power supply unit 100, switch unit 200 and charge and discharge
Electric unit 300, power supply unit 100 are electrically connected with switch unit 200, and switch unit 200 electrically connects with charge/discharge unit 300
It connects.Power supply unit 100 is used to be electrically connected with the both ends of two contacts of relay, selectively to power and make to relay
Two contacts of relay are electrically connected.Charge/discharge unit 300 is used to connect two contacts of relay by switch unit 200
It connects or disconnects.
It is understood that the operation principle of relay contact deoxidation module 10 provided in this embodiment：Relay
Using easily aoxidizing, layer oxide film can be formed after oxidation in air on the surface of contact for contact.Oxidation on contact
Film can increase contact resistance, and then influence the working performance of relay.The present embodiment is using movable contact and stationary contact in cooperation
Between shock remove the oxidation film on contact.Power supply unit 100 is used to power to two contacts of relay, so that stationary contact
Point is hit with movable contact when connecting.Charge/discharge unit 300 is used for 200 charge or discharge of switch unit, so that relay closes
It closes or disconnects.
It is also desirable to explanation, in 100 continued power of power supply unit, can by charge/discharge unit 300 to after
The stationary contact of electric appliance and the closed state of movable contact are controlled.Optionally, user can be by repeatedly controlling charge/discharge unit
300 number the movable contact of relay and stationary contact to be controlled mutually to hit, and then further destroy oxidation film.
Referring to Fig. 2, in the present embodiment, power supply unit 100 includes power supply source and first resistor 110, power supply source and the
One resistance 110 is electrically connected, and the both ends of the both ends of first resistor 110 respectively with two contacts of relay are connect, first resistor
110 one end far from power supply source is electrically connected with switch unit 200.
It is understood that switch unit 200 includes at least one capacitance 210, one end of capacitance 210 and first resistor
110 are electrically connected, the other end ground connection of capacitance 210.
In the present embodiment, switch unit 200 includes multiple capacitances 210, and multiple capacitances 210 are electrically connected in parallel, and
One end of capacitance 210 is electrically connected with first resistor 110, the other end ground connection of capacitance 210.
In the present embodiment, charge/discharge unit 300 includes switch 310 and second resistance 320, switch 310 one end with after
One end far from power supply source of electric appliance is electrically connected, and is switched 310 other end and is connect with one end of second resistance 320, second resistance
320 other end ground connection.
In the present embodiment, relay contact deoxidation module 10 further includes detection control unit, detection control unit with
Capacitance 210 is electrically connected, to detect the voltage of capacitance 210 and generate the voltage signal of characterization 210 information of voltage of capacitance, detection control
Unit processed selectively controls power supply source to open according to voltage signal.
The advantageous effect of relay contact deoxidation module 10 provided in this embodiment：The contact of relay makes in air
With easily aoxidizing, layer oxide film can be formed on the surface of contact after oxidation.Oxidation film on contact can increase contact electricity
Resistance, and then influence the working performance of relay.The present embodiment using movable contact and stationary contact in cooperation between shock make a return journey
Except the oxidation film on contact.Power supply unit 100 is used to power to two contacts of relay, so that stationary contact and movable contact are even
It is hit when logical.Charge/discharge unit 300 is used for 200 charge or discharge of switch unit, so that relay is closed or disconnects, and then go
Except the oxidation film on contact.
Second embodiment
Referring to Fig. 3, in the present embodiment, relay contact deoxidation module 10 further includes oxidation detection unit 400, oxygen
Change detection unit 400 and include sampling unit and processing unit 410, sampling unit is electrically connected with processing unit 410, processing unit
410 are electrically connected with power supply unit 100.Relay includes the first stationary contact and the second stationary contact that can be electrically connected with each other,
Sampling unit be used for be electrically connected respectively with the first stationary contact and the second stationary contact and obtain the first stationary contact first voltage and
The second voltage of second stationary contact.Sampling unit is additionally operable to obtain the first stationary contact and second according to first voltage and second voltage
Voltage difference is simultaneously transmitted to processing unit 410 by the voltage difference of stationary contact.Processing unit 410 calculates the first stationary contact according to voltage difference
And second contact resistance between stationary contact and generate control signal according to contact resistance, processing unit 410 is additionally operable to control
Signal transmission is to power supply unit 100.Power supply unit 100 is additionally operable to be turned on and off according to control signal.
It is understood that oxidation detection unit 400 is used to be detected the attracting state of relay, so as to according to inspection
The attracting state of survey removes oxide film dissolving to contact.At this point, two stationary contacts of sampling unit and relay are electrically connected, sampling
Power supply acquires the voltage value of the two stationary contacts respectively, and the voltage value for passing through the two stationary contacts is calculated between the two
Voltage difference.Processing unit 410 goes out connecing for relay according to the voltage difference of two stationary contacts of relay and the Current calculation of relay
It gets an electric shock and hinders.Contact resistance reflects the actuation effect of relay：Contact resistance is bigger, and it is poorer to be attracted effect；Contact resistance is smaller,
It is better to be attracted effect.Processing unit 410 judges that relay is attracted the quality of effect according to the value of contact resistance, works as processing unit
410 judge relay actuation effect it is bad when, to power supply unit 100 send control instruction, power supply unit 100 to be controlled to open
It opens, and then stationary contact is made to contact and hit with movable contact, so as to hit the oxidation film on removal contact.
Oxidation detection unit 400 provided in this embodiment can also include display unit, to show the resistance value of contact resistance
Or display is attracted information, so that user can intuitively be observed.
It is also desirable to explanation, after processing unit 410 obtains contact resistance, can directly using contact resistance as
Information is attracted, can also be rule of thumb that actuation effect is good according to the different demarcation of Standard resistance range to contact resistance, be attracted effect
General and actuation effect is poor, such as：When contact resistance is less than the first resistance value, display unit is shown " it is good to be attracted effect "；
When the resistance value of contact resistance is between the first resistance value and the second resistance value, display unit is shown " it is general to be attracted effect "；When
When the resistance value of contact resistance is more than the second resistance value, display unit is shown " it is poor to be attracted effect ".Certainly, display unit can also
Directly display the resistance value of contact resistance.
Referring to Fig. 4, in the present embodiment, processing unit 410 includes electric current read module 411, computing module 412 and leads to
Believe module 413, electric current read module 411 is electrically connected with computing module 412, and computing module 412 electrically connects with communication module 413
It connects, computing module 412 is electrically connected with sampling unit, and communication module 413 is electrically connected with display unit.Electric current read module
411 flow through the current value of relay for reading, and current value is transmitted to computing module 412, and computing module 412 is used for basis
Current value and voltage difference calculate contact resistance and the actuation information of the actuation effect of characterization relay are obtained according to contact resistance,
Communication module 413 is transmitted to display unit for that will be attracted information.
It is understood that the current information for the relay that computing module 412 is read according to electric current read module 411 and taking
Contact resistance (calculation formula is calculated in the voltage difference of two stationary contacts of relay that sample unit obtains：R=U/I).
Optionally, display unit is LCD screen or LED screen etc..
In the present embodiment, relay includes the first stationary contact and the second stationary contact that are electrically connected with each other, sampling unit
Including the first sampling module 421, the second sampling module 422 and voltage difference computing module 423.One end of first sampling module 421
For the first voltage of the first stationary contact of acquisition to be electrically connected and is used for the first stationary contact.First sampling module 421 it is another
End is electrically connected with voltage difference computing module 423, and one end of the second sampling module 422 is used to be electrically connected simultaneously with the second stationary contact
For acquiring the second voltage of the second stationary contact, the other end and the voltage difference computing module 423 of the second sampling module 422 electrically connect
It connects.Voltage difference computing module 423 and processing unit 410 are electrically connected and for that will calculate the according to first voltage and second voltage
The voltage difference obtained between one stationary contact and the second stationary contact is transmitted to processing unit 410.
Referring to Fig. 5, in the present embodiment, the first sampling module 421 include 3rd resistor 4211, the 4th resistance 4212 and
First voltage comparator 4213.One end of 3rd resistor 4211 is used to be electrically connected with the first stationary contact, 3rd resistor 4211
One end of the other end and the 4th resistance 4212 is electrically connected, the other end ground connection of the 4th resistance 4212.First voltage comparator
4213 the second input terminal is electrically connected with 3rd resistor 4211 close to one end of the 4th resistance 4212, first voltage comparator
4213 first input end is electrically connected with the output terminal of first voltage comparator 4213, the output of first voltage comparator 4213
End is electrically connected with voltage difference computing module 423.
In the present embodiment, the second sampling module 422 includes the 5th resistance 4221, the 6th resistance 4222 and second voltage ratio
Compared with device 4223.One end of 5th resistance 4221 is used to be electrically connected with the second stationary contact, the other end of the 5th resistance 4221 and the
One end of six resistance 4222 is electrically connected, the other end ground connection of the 6th resistance 4222.The second of second voltage comparator 4223 is defeated
Enter end to be electrically connected close to one end of the 6th resistance 4222 with the 5th resistance 4221, the first input of second voltage comparator 4223
End and the output terminal of second voltage comparator 4223 are electrically connected, and output terminal and the voltage difference of second voltage comparator 4223 calculate
Module 423 is electrically connected.
That is, the first voltage value of the first stationary contact is by being input to processing unit 410 again after amplifying.It can
To understand, the second voltage value of the second stationary contact is also required to amplify the multiple identical with the first voltage value, so as to first voltage with
Second voltage obtains rational result when being calculated.Meanwhile it is attracted the accurate of effect detection also for guarantee relay
Property and validity.Also, the first voltage and second voltage after amplification are when for calculating voltage difference, it is also ensured that
The precision of calculating further improves the accuracy for being attracted effect detection.
In the present embodiment, voltage difference computing module 423 includes the 7th resistance 4231, the 8th resistance 4232, the 9th resistance
4233rd, the tenth resistance 4234 and tertiary voltage comparator 4235.One end of 7th resistance 4231 and the first sampling module 421 are electrical
Connection, the other end of the 7th resistance 4231 are electrically connected with the second input terminal of tertiary voltage comparator 4235, the 8th resistance
4232 both ends are electric with the output terminal of the second input terminal of tertiary voltage comparator 4235 and tertiary voltage comparator 4235 respectively
Property connection.One end of 9th resistance 4233 is electrically connected with the second sampling module 422, the other end and third of the 9th resistance 4233
The first input end of voltage comparator 4235 is electrically connected, and the of one end of the tenth resistance 4234 and tertiary voltage comparator 4235
One input terminal is electrically connected, the other end ground connection of the tenth resistance 4234.The output terminal of tertiary voltage comparator 4235 is single with processing
Member 410 is electrically connected.
It is understood that 3rd resistor 4211 is used to be electrically connected with the first stationary contact, and electric by collected first
Pressure is amplified processing by first voltage comparator 4213, and first voltage comparator 4213 is by first voltage by amplified
Voltage is transmitted to the first input end of tertiary voltage comparator 4235；5th resistance 4221 is used to electrically connect with the second stationary contact
It connects, and collected second voltage is amplified processing, second voltage comparator 4223 by second voltage comparator 4223
Second voltage is transmitted to the second input terminal of tertiary voltage comparator 4235, tertiary voltage comparator by amplified voltage
4235 pairs of amplified first voltages and second voltage are compared, and the result of voltage difference is transmitted to processing unit 410
Computing module 412.Computing module 412 calculates contact resistance according to the galvanometer of voltage difference and relay, and according to contact electricity
Resistance sends control instruction to power supply unit 100.
3rd embodiment
A kind of relay contact deoxidation method is present embodiments provided, using relay contact deoxidation module 10.After
Appliance contact deoxidation module 10 include power supply unit 100, switch unit 200 and charge/discharge unit 300, power supply unit 100 with
Switch unit 200 is electrically connected, and switch unit 200 is electrically connected with charge/discharge unit 300.Power supply unit 100 is used for and relay
The both ends of two contacts of device are electrically connected, and are electrically connected with two contacts that relay is selectively powered and made to relay
It connects.Charge/discharge unit 300 is used for two contact portions or the disconnection that make relay by switch unit 200.Relay contact is gone
Method for oxidation includes：The voltage of regulating relay makes to hit between movable contact and stationary contact.Changing the voltage of relay makes
It is detached between movable contact and stationary contact.
S100：The voltage of regulating relay makes to hit between movable contact and stationary contact
It is understood that by power supply unit 100 come the voltage of regulating relay, so that between movable contact and stationary contact
Occur to hit the oxidation film for removing its surface.
S200：Changing the voltage of relay makes to detach between movable contact and stationary contact
It is understood that change the voltage of relay by charge/discharge unit 300, so that between movable contact and stationary contact
Separation.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of relay contact deoxidation module, which is characterized in that for removing the oxidation film of the contact surface of relay, institute
It states relay contact deoxidation module and includes power supply unit, switch unit and charge/discharge unit, the power supply unit is opened with described
It closes unit to be electrically connected, the switch unit is electrically connected with the charge/discharge unit；
The power supply unit is used to be electrically connected with the both ends of two contacts of the relay, with selectively to the relay
Device powers and is electrically connected two contacts of the relay；
The charge/discharge unit is used for two contact portions or the disconnection that make the relay by the switch unit.
2. relay contact deoxidation module according to claim 1, which is characterized in that the power supply unit includes power supply
Source and first resistor, the power supply source and the first resistor are electrically connected, the both ends of the first resistor respectively with it is described after
The both ends connection of two contacts of electric appliance, the one end of the first resistor far from the power supply source electrically connects with the switch unit
It connects.
3. relay contact deoxidation module according to claim 2, which is characterized in that the switch unit is included at least
One capacitance, one end of the capacitance are electrically connected with the first resistor, the other end ground connection of the capacitance.
4. relay contact deoxidation module according to claim 2, which is characterized in that the switch unit includes multiple
Capacitance, multiple capacitances are electrically connected in parallel, and one end of the capacitance is electrically connected with the first resistor, the electricity
The other end ground connection of appearance.
5. relay contact deoxidation module according to claim 3, which is characterized in that the charge/discharge unit includes opening
It closes and second resistance, one end of the switch is electrically connected with the one end of the relay far from the power supply source, the switch
The other end connect with one end of the second resistance, the other end of second resistance ground connection.
6. relay contact deoxidation module according to claim 3, which is characterized in that the relay contact deoxidation
Module further includes detection control unit, and the detection control unit is electrically connected with the capacitance, to detect the electricity of the capacitance
It presses and generates the voltage signal for characterizing the capacitance voltage information, the detection control unit is according to voltage signal selectivity
Ground controls the power supply source to open.
7. relay contact deoxidation module according to claim 1, which is characterized in that the relay contact deoxidation
Module further includes oxidation detection unit, and the oxidation detection unit includes sampling unit and processing unit, the sampling unit with
The processing unit is electrically connected, and the processing unit is electrically connected with the power supply unit；
The relay includes the first stationary contact and the second stationary contact that can be electrically connected with each other, and the sampling unit is used to divide
First voltage and the institute of first stationary contact are not electrically connected and obtained with first stationary contact and second stationary contact
State the second voltage of the second stationary contact；
The sampling unit is additionally operable to obtain first stationary contact and described according to the first voltage and the second voltage
The voltage difference is simultaneously transmitted to the processing unit by the voltage difference of the second stationary contact；
The processing unit calculates the contact electricity between first stationary contact and second stationary contact according to the voltage difference
It hinders and control signal is generated according to the contact resistance, the processing unit is additionally operable to the control signal transmission to the electricity
Source unit；
The power supply unit is additionally operable to be turned on and off according to the control signal.
A kind of 8. relay contact deoxidation method, which is characterized in that using the relay described in any one in claim 1-7
Device contact deoxidation module, the relay contact deoxidation method include：
The voltage of regulating relay makes to hit between movable contact and stationary contact；
Changing the voltage of the relay makes to detach between the movable contact and the stationary contact.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711181541.9A CN107785209B (en) | 2017-11-23 | 2017-11-23 | Relay contact deoxidation module and method |
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|---|---|---|---|
| CN201711181541.9A CN107785209B (en) | 2017-11-23 | 2017-11-23 | Relay contact deoxidation module and method |
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| CN107785209A CN107785209A (en) | 2018-03-09 |
| CN107785209B true CN107785209B (en) | 2018-06-26 |
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| CN104656628A (en) * | 2013-11-18 | 2015-05-27 | 比亚迪股份有限公司 | Contactor-used sintering detection device and method |
| CN105790750A (en) * | 2014-12-26 | 2016-07-20 | 中车大连电力牵引研发中心有限公司 | WTB contact deoxidation circuit |
| CN206497184U (en) * | 2017-01-24 | 2017-09-15 | 深圳天川电气技术有限公司 | A kind of detection means and the detection circuit for contactor |
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2017
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| JPH07230750A (en) * | 1994-02-17 | 1995-08-29 | Meidensha Corp | Di power supply device with oxide film remover for relay contact |
| CN104656628A (en) * | 2013-11-18 | 2015-05-27 | 比亚迪股份有限公司 | Contactor-used sintering detection device and method |
| CN203643576U (en) * | 2013-12-09 | 2014-06-11 | 北京天元晟业科技有限公司 | Relay detecting device |
| CN105790750A (en) * | 2014-12-26 | 2016-07-20 | 中车大连电力牵引研发中心有限公司 | WTB contact deoxidation circuit |
| CN206497184U (en) * | 2017-01-24 | 2017-09-15 | 深圳天川电气技术有限公司 | A kind of detection means and the detection circuit for contactor |
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| CN107785209A (en) | 2018-03-09 |
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