CN1606112A - High-voltage loaded switch device - Google Patents
High-voltage loaded switch device Download PDFInfo
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- CN1606112A CN1606112A CN 200410085601 CN200410085601A CN1606112A CN 1606112 A CN1606112 A CN 1606112A CN 200410085601 CN200410085601 CN 200410085601 CN 200410085601 A CN200410085601 A CN 200410085601A CN 1606112 A CN1606112 A CN 1606112A
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- 239000000463 material Substances 0.000 claims abstract description 83
- 239000011159 matrix material Substances 0.000 claims abstract description 20
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- 238000010891 electric arc Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 21
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- 238000007254 oxidation reaction Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 11
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- 229910006404 SnO 2 Inorganic materials 0.000 description 7
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- 239000002184 metal Substances 0.000 description 3
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Abstract
The invention provides a high voltage load switching device for an automobile use, capable of controlling a direct current high voltage load of 36V or higher in an automobile of next generation like a hybrid-car or an electric automobile. The switching device has a switching mechanism of single break structure equipped with a contact element formed of electric contact materials composed of 2.0 to 20.0 wt.% of MgO grains and the rest of Ag, having MgO grains dispersed in an Ag matrix, and controls the high voltage load of direct current voltage of 36 to 400 V and a rated current of 0.01 to 15 A. Preferably, a content of MgO is 8.1 to 15 wt.%, and it is preferable that the electric contact material is formed by mixing Ag powder and MgO powder to disperse MgO grains having an average grain size of 1.1 to 6.0 [mu]m in the Ag matrix.
Description
Technical field
The present invention relates to electric switchgear, particularly be equipped on 42V direct voltage automobile of new generation, electric automobile, hybrid automobile with the high-voltage loaded switching device more than the control 36V direct voltage.
Background technology
The switching device that is used for mechanical switching circuit generally possesses the electric contact that is called as contact element (abbreviating contact sometimes as).This electric contact is that the requirement metal flows through the element that the electric current of this contact element can transmit without barrier with signal and can separate without barrier during with Metal Contact when disconnecting.In addition, well-known, though this contact element itself is simple in structure, on this contact surface various physical chemical phenomenons can take place.For example, absorption, oxidation, sulfuration, organic compound synthetic follows fusion, evaporation, consumption and the transfer etc. of arc discharge in addition, and this phenomenon is very complicated, and the parts of much not separating are arranged academicly.
If above-mentioned phenomenons such as consumption and transfer occur because of arc discharge, then the contact performance of contact element is destroyed, cause poor flow and locking phenomena sometimes, make the switch block can not operate as normal, electric equipment products that this switching device has been installed etc. is caused very big infringement.This explanation switching device of being packed into is one of the life-span of decision electric equipment products etc. and important spare part of performance.
In recent years, along with the fast development that electron and electrician is learned, the scope of application of switching device expands to the forceful electric power fields such as electrical equipment of the big electric current of blocking-up from light current fields such as telecommunication telephone and various electronic products.Therefore, desired performance also varies, and the switch block with the characteristic that satisfies various different application targets is developed, and the switching device that possesses these switch blocks newly developed is put on market just in a large number.
As everyone knows, switching device about automotive field, be that Control of Automobile is carried to possess in the switching device of load and used the Ag-Cu system (alloy that the Cu of 1～40 weight % and the Ag of surplus branch form) that makes by fusion, casting, the Ag-SnO that makes by the internal oxidation method
2(the SnO of 5～15 weight % of system
2And Ag-SnO the alloy that forms with the Ag of surplus branch),
2-In
2O
3The contact element of electric contact materials such as system (referring to Patent Document 1 and 2).
[patent documentation 1] Japan Patent spy opens the 2000-309834 communique
[patent documentation 2] international brochure that discloses No. 01/04368
But, the automobile of a new generation, for example in hybrid automobile and the electric automobile, the electronic apparatus that will be equipped on automobile in advance is controlled to be 42V direct voltage (or 48V direct current), must control the very high voltage load that maximum voltage value reaches 300～400V.Like this, for dc load in the past can't compare high-voltage loaded, i.e. the above direct current electric charge of 36V, having adopted in the past, the contact element of known electric contact material can't adapt to present switch block.
To just must fully guarantee contact clearance with so high-voltage loaded practical blocking-up electric arc, but singly-bound disrupted configuration used in the present switch block is having the limit aspect the expansion contact clearance, more than 36V high-voltage loaded down, can not block the electric arc that when disconnecting, produces sometimes.Can cause the accident that burns out the electric equipment products of being controlled in the worst case.
Block this electric arc, well-known is the switching device that adopts the arc extinguishing method that has utilized magnetic force, but switch block is complicated.That is, in the past automobile carries with switching device can not control the above high dc load of 36V, and strong hope is developed has present the new switching device that requires characteristic that can not reach.
Summary of the invention
The present invention is to be the invention that background is finished with above-mentioned situation, its objective is the switching device that the high-voltage loaded switch block that possesses young mobiles such as can being applicable to hybrid automobile and electric automobile is provided, more specifically provide the high-voltage loaded high-voltage loaded switch device of the above direct current of may command 36V.
In order to finish above-mentioned problem, the present inventor carries out finding after the conscientious research repeatedly, use is scattered in the contact element that the electric contact material in the Ag matrix forms and the switch block that constitutes by MgO, more than 36V high-voltage loaded down, can obviously shorten the duration of the electric arc that produces at contact element, thereby finish the present invention.
The present invention relates to high-voltage loaded switch device, the feature of this device is, switch block with singly-bound disrupted configuration, these parts possess that Ag by the MgO particle of 2.0～20.0 weight % and surplus branch forms, be dispersed with the contact element that the electric contact material of MgO particle constitutes in the Ag matrix, and control direct voltage 36～400V, rated current 0.01～15A's is high-voltage loaded.
The present inventor studies the back discovery to the switch block that the contact element that is formed by the oxide based electric contact material of Ag-that has disperseed various oxides in the Ag matrix constitutes the singly-bound disrupted configuration, in research range, found only to have MgO and do not added the pure Ag contact of any oxide to have shortened the phenomenon of arc duration than big difference.That is, the switching device that possesses the contact element that has used the oxide based electric contact material of the Ag-that disperseed MgO in the Ag matrix is only arranged, also can be more than 36V high-voltage loaded down, the electric arc that produces when blocking-up disconnects is kept normal switching manipulation.According to present inventor's research, confirm the influence of particle weight that the electric arc of contact element under dc high voltage is loaded that is formed by the electric contact material that has disperseed the MgO particle in the Ag matrix subdues phenomenon and be subjected to the MgO that disperses in the Ag matrix, dispersity, particle diameter.
The electric contact material that is used for the contact element of high-voltage loaded switch device of the present invention, if MgO less than 2.0 weight %, then shortens the DeGrain of arc duration, if surpass 20.0 weight %, then contact resistance increases obviously, and the processability of material has the tendency of obvious deterioration.Better composition is the MgO that contains 8.1～15 weight % when reality is used.If in this scope, all aspects such as shortening effect, low contact resistance, materials processing that then can be formed in the arc duration all have the contact element of superperformance, can obtain to be applicable to high-voltage loaded switching device.
In addition, the present inventor investigates the back to the MgO dispersion of nano-particles state in the electric contact material and finds that the electric contact material that is disperseed with stratiform by the MgO particle forms contact element, and the electric arc of MgO particle under the dc high voltage load suppresses effect and diminishes.
Ag-MgO electric contact material of the present invention also can make (referring to Patent Document 3) by so-called internal oxidation method.But, the present inventor attempts utilizing as the internal oxidation legal system of prior art and does to confirm behind the Ag-MgO electric contact material, be merely able to obtain oxide disperses or occur very serious gel state with stratiform electric contact material, the contact element that employing is made by this electric contact material can not fully suppress the electric arc under the dc high voltage load.
[patent documentation 3] Japan Patent spy opens the 2002-363666 communique
Here, illustration organizes cross-section photograph that the structural state of the electric contact material of Ag-MgO is specifically described.At first, under the situation that adopts the internal oxidation method, fusion Mg and Ag make Mg reach 3.0 weight %, and the surplus Ag that is divided into is cast as template.Plate be rolled, cut out the square angle of 10mm after being processed into the template that thickness is 1.5mm thereafter.Then, pressing at oxygen is that 5 air pressure, temperature are that the butt joint spot film carries out internal oxidation under 750 ℃ the condition, confirms the MgO dispersion of nano-particles state in the electric contact material of gained Ag-MgO.MgO dispersion of nano-particles state when Fig. 1 represents to adopt the internal oxidation method.Judge that thus MgO disperses with stratiform in the Ag matrix.Fig. 2 represents the internal oxidation condition to become oxygen, and to press be 0.2 air pressure, the MgO dispersion of nano-particles state when temperature is 750 ℃.In this case, the MgO particles aggregate forms bigger bulk, is present in the Ag matrix with this state.
On the other hand, the present inventor mixes the Ag powder and the MgO powder of regulation particle diameter with the proportioning of regulation, carries out sintering processes after the compression process, makes the Ag-MgO electric contact material, confirms to have obtained in the Ag matrix MgO with the material (Fig. 3) of granular dispersion.The alloy of the composition of electric contact material shown in Figure 3 and the Ag of above 3.0 weight % (metal conversion) Mg and surplus branch is identical by the composition of the material that internal oxidation makes, and promptly mixes the Ag powder of the MgO powder of 4.9 weight % and surplus branch and the Ag-MgO electric contact material that obtains.
Material that utilizes the internal oxidation method to obtain and the material that utilizes powder metallurgic method to obtain are used for the back discovery of dc high voltage load, the electric arc that produces when the material that utilizes the internal oxidation method to obtain can't fully suppress to disconnect.
Ag-MgO electric contact material of the present invention also can obtain (referring to Patent Document 4) by the manufacture method that has adopted so-called machine-alloying.But the present inventor carries out finding the electric arc in the time of can't fully suppressing to disconnect after the mechanical alloying based on patent documentation 4 as prior art.
[patent documentation 4] Japanese patent laid-open 09-111367 communique
Judge from the above result of study that structural state the Ag-MgO electric contact material is carried out, automobile of the present invention carries in the high-voltage loaded switch device, be preferably and mix Ag powder and MgO powder, make the MgO particle of average grain diameter 1.1～6.0 μ m be scattered in formed material in the Ag matrix.Be used for as the high-voltage loaded switching device more than the direct voltage 36V of object of the present invention, the MgO in the Ag-MgO electric contact material of formation contactor material must be present in the Ag matrix with particle state.For example, MgO is present in electric contact material in the Ag matrix with the state with the Ag alloying, can not fully suppress the electric arc of dc high voltage load.
The electric contact material that is used for switching device of the present invention, if the average grain diameter of MgO particle less than 1.1 μ m, then dc high voltage load electric arc inhibition effect down has the tendency of decline.If surpass 6.0 μ m, then easily cause electric arc to be concentrated, cause partial spent.The average grain diameter that is more preferably the MgO particle is 1.5～3.0 μ m, and this is the most practical scope.
If utilize above-mentioned Ag-MgO electric contact material to form contact element, acquisition constitutes the switching device of the switch block of singly-bound disrupted configuration by this contact element, then can control high-voltage loaded that the automobile of direct voltage 36～400V, rated current 0.01～15A carries.Fig. 4 represents the simulation drawing of singly-bound disrupted configuration, but this is the prevailing structure of switch block, and this structure utilizes the switch energising control of 2 contact elements high-voltage loaded.
If the contact element that is formed by the Ag-MgO electric contact material of the switching device that is used for the invention described above is used to possess the switching device of the switch block of so-called pair of key disrupted configuration, then can control the high-voltage loaded of direct voltage 36～400V, rated current 5～500A.Fig. 5 represents the simulation drawing of two key disrupted configurations, and is different with the singly-bound disrupted configuration, and it is to utilize 2 groups of switch energising controls of 4 contact elements high-voltage loaded, compares with the singly-bound disrupted configuration, has the feature that can enlarge contact clearance.
In the Ag-MgO electric contact material of the formation contact element of the switching device of this pair key disrupted configuration, if MgO is less than 2.0 weight %, the DeGrain that shortens of arc duration then, if surpass 20.0 weight %, then the increase of contact resistance is obvious, and the processability of material has the tendency of obvious deterioration.Use consideration from reality, better composition is the MgO that comprises 8.1～15 weight %.If in this scope, all aspects such as shortening effect, low contact resistance, materials processing that then can form the arc duration all have the contact element of superperformance, obtain to be applicable to high-voltage loaded switching device.In addition, same with the switching device of above-mentioned singly-bound disrupted configuration, be more preferably and mix Ag powder and MgO powder, make the MgO particle of average grain diameter 1.1～6.0 μ m be scattered in formed electric contact material in the Ag matrix.
Even the present invention is under the load of the dc high voltage more than 36V～400V, arc duration in the time of also can greatly shortening the switching of electric switch parts, make control be equipped on stable the carrying out of switching manipulation of the electronic apparatus of young mobiles such as hybrid automobile and electric automobile.
Description of drawings
Fig. 1 organizes cross-section photograph (400 times of multiplying powers) for the Ag-MgO electric contact material that makes by the internal oxidation method.
Fig. 2 organizes cross-section photograph (400 times of multiplying powers) for the Ag-MgO electric contact material that makes by the internal oxidation method.
Fig. 3 organizes cross-section photograph (400 times of multiplying powers) for the Ag-MgO electric contact material that makes by powder metallurgic method.
Fig. 4 is the simulation drawing of singly-bound disrupted configuration.
Fig. 5 is the simulation drawing of two key disrupted configurations.
Fig. 6 represents the measurement result of the arc duration of the voltage-to-current of the electric contact material of example 1 in the past.
The measurement result of arc duration when Fig. 7 represents example 1 in the past, embodiment 3 and 4 electric contact material changes current value under different voltages.
Fig. 8 represent example 1 in the past electric contact material make DC42V the time the measurement result of the arc duration of inductance when changing.
The measurement result of arc duration when Fig. 9 represents that the electric contact material of example 1～3, comparative example 1, embodiment 4 changed current value in the past under DC42V.
The measurement result of arc duration when Figure 10 represents that the electric contact material of example 4 and 5, comparative example 1, embodiment 4 changed current value in the past under DC42V.
MgO addition when Figure 11 represents that the electric contact material of embodiment 1～8 changes current value under DC42V and the relation of arc duration.
Embodiment
Based on following embodiment 1～8, describe implementing best mode of the present invention.
Table 1 is depicted as the composition of electric contact material of the embodiment 1～8 of the contact element that is used for switching device.Example in the past 1～5, the comparative example 1 of record are that the electric contact material that adopts in order to compare with embodiment is formed in the table 1.
Table 1
| Alloy composition (weight %) | |
| Embodiment 1 | ????Ag96.7-MgO3.3 |
| | ????Ag95.1-MgO4.9 |
| Embodiment 3 | ????Ag93.5-MgO6.5 |
| Embodiment 4 | ????Ag92.0-MgO8.0 |
| | ????Ag90.5-MgO9.5 |
| | ????Ag87.0-MgO13.0 |
| | ????Ag84.0-MgO16.0 |
| | ????Ag81.0-MgO19.0 |
| Example 1 in the past | ????Ag85.5-SnO 29.8-In 2O 34.7 |
| Example 2 in the past | ????Ag88.0-SnO 212.0 |
| Example 3 in the past | ????Ag88.0-CuO12.0 |
| Example 4 in the past | ????Ag90.0-ZnO10.0 |
| Example 5 in the past | ????Ag88.0-CdO12.0 |
| Comparative example 1 | ????Ag |
Fig. 3 represents the cross-section photograph of organizing of embodiment 2, and can confirm thus, and the MgO particle of average grain diameter 2.0 μ m is dispersed in the Ag matrix.
The electric contact material of embodiment 1～8 is the material that utilizes powder metallurgic method to make, and the metering of according to the rules proportioning will make mixed-powder with V-Mixer as the Ag powder of the average grain diameter 6 μ m of material powder and the MgO powder of average grain diameter 2 μ m.Then, this mixed-powder is packed in the cylindrical vessel of φ 50mm, from cylinder vertically begin exert pressure, compression process becomes cylindrical blank.After this compression process, in 850 ℃ of sintering processes of carrying out 4 hours.This compression process and sintering processes repeat 4 times, finally make the cylindrical blank of φ 50mm.
The electric contact material of example 1,3～5 was the materials that utilize the internal oxidation method to make in the past, was cast as blank after employing high-frequency melting stove is founded the Ag alloy of various compositions, was reprocessed into sheet.Then, pressing at oxygen is that 5 air pressure, temperature are that 750 ℃ of internal oxidations that this tablet was carried out 48 hours are handled, and collects the tablet after internal oxidation is handled, and in the cylindrical vessel of the φ 50mm that packs into, vertically begins to exert pressure from cylinder, and compression process becomes cylindrical blank.After this compression process, in 850 ℃ of sintering processes of carrying out 4 hours.This compression process and sintering processes repeat 4 times, finally make the cylindrical blank of φ 50mm.
Example 2 was to be the cylindrical blank of the φ 50mm that makes of the manufacture method of electric contact material according to the Ag-Sn that the Japan Patent spy opens the record of clear 54-110124 communique in the past.
Comparative example 1 is to cast with common high-frequency melting stove, finally makes the cylindrical blank of φ 50mm.
The above blank that utilizes different manufacture methods to make is made the wire rod (the squish area ratio is about 51: 1) of φ 7mm by hot extrusion processing.Then, carry out Wire Drawing, obtain the wire rod of diameter 2.3mm, utilize again button head machine make the head footpath for 3.5mm, thick be the riveted joint contact of 1mm.
Measure the arc duration of respectively riveting contact that above processing obtains with the ASTM testing machine.The ASTM test is as shown in table 2, can freely select voltage and current.In addition, the opening speed of contact is 80mm/ second.
Table 2
| The condition of ASTM test | |
| Power supply | DC power supply |
| Voltage | ??14V、28V、42V、48V、60V |
| Electric current | ??5A、10A、15A、20A、25A |
| Inductance | ??0mH、1mH、3mH、6mH |
| Test temperature | Room temperature |
| Switching frequency | 0.5 open-0.5 second pass second |
| The switch number of times | 200,000 times |
| The testing stand number | 3 |
As being used for arc duration that automobile carries each voltage with the prevailing example in the past 1 of the electric contact material of switching device, each electric current as shown in Figure 6.Under DC14V, the interior arc duration of the scope of current value 5A～25A is no change almost.But if become the above voltage of DC42V, then the proportionate relationship with electric current begins to disappear, if surpass a certain current value, the phenomenon that the arc duration sharply increases then occurs.Show by this phenomenon, for example, for the electric current of control more than the 25A under DC42V, based on the characteristic of in the past electric contact material, even will keep all unusual difficulties of its former linear relationship.
Fig. 7 represents each voltage of above-mentioned example in the past 1 and embodiment 3 and 4, the arc duration of each electric current.Can judge from Fig. 7, under voltage less than 30V, example 1, embodiment 3 and arc duration of 4 no change almost all in the past.If but becoming the above magnitude of voltage of 36V, the current value of example 1 increases in the past, the tendency that the arc duration sharply increases then occurs, in contrast, though embodiment 3 and 4 has the tendency that the arc duration slightly increases, but stable.
Result when Fig. 8 represents that the inductance of contactor material when DC42V of example 1 changed in the past.The load that is used for automobile is compared with simple resistive load, and great majority have the inductive load of inductance for motor etc., and the condition of the resistive load that this duty ratio with inductance is simple is harsher.
Therefore, about Fig. 6 and content shown in Figure 8, be benchmark with the Ag contact of comparative example 1, the oxide amount that adds and the relation of arc duration are studied.It the results are shown in Fig. 9 and Figure 10.
Can judge by Fig. 9 and Figure 10, in Ag, add SnO
2+ In
2O
3, SnO
2, CuO electric contact material compare with the Ag contact, have the tendency that the arc duration prolongs.On the other hand, in Ag, added the electric contact material of ZnO, CdO, MgO and compared, had the tendency that the arc duration shortens with the Ag contact, when particularly adding MgO, its level that shortens the arc duration reached example in the past unpredictable degree.
Result when Figure 11 represents to change the addition of MgO.If current value is below 15A, then the addition with 13 weight % can shorten the arc duration to greatest extent.If current value becomes 25A, then the MgO addition with 8 weight % can shorten the arc duration to greatest extent.As can be seen from Figure 11, the composition that can shorten the arc duration at all current values is studied the back and find that the MgO scope of 5～15 weight % is the composition of realistic use.The scope that is anticipated that 8.1～10.0 weight % can shorten the arc duration especially effectively.
Below, the gap clearance is investigated.During for the singly-bound disrupted configuration, generally machine is set with the contact clearance below the switch 4mm, below the relay 2mm.Therefore, this singly-bound disrupted configuration can use in the scope of direct voltage 36～400V, rated current 0.01～15A.When use in the high zone of rated current, be necessary for two key disrupted configurations.This switch can use when direct voltage 36～400V, rated current 5～500A.
Below only have MgO to have the result that such electric arc suppresses effect why to describe to what the present inventor investigated.It is as described below that the present inventor studies MgO that pusher the measures principle to the inhibition effect of electric arc under the dc high voltage load.
The present inventor thinks, the arc phenomenon under the dc high voltage load and the photoelectron of material discharge (material runs into the phenomenon that photon energy is higher than the light time release electronics of work function) and hot electron discharges (if the temperature of material raises, then electronics is excited, in case have the energy that is higher than work function then the d/d phenomenon of electronics) relevant.That is, in order to hold these phenomenons, consider to measure the work function of different material, the result who carries out after the practical measurement is as shown in table 3.This result shows easy more release photoelectron of the low more material of work function and hot electron.As a reference, the fusing point and the boiling point of different material have also been put down in writing.Owing to there is the material that can't manifest clear and definite boiling point when having the distillation characteristic in the oxide, this situation is represented with "-".
Table 3
| Material | Work function (eV) | Fusing point (℃) | Boiling point (℃) |
| ??Ag | ????4.85 | ????961 | ????2210 |
| ??MgO | ????4.32 | ????2800 | ????3600 |
| ??SnO 2 | ????5.64 | ????1630 | ????- |
| ??In 2O 3 | ????5.69 | ????1325 | ????2000 |
| ??CuO | ????5.25 | ????1026 | ????- |
| ??ZnO | ????5.33 | ????1975 | ????- |
| ??CdO | ????5.30 | ????1000 | ????- |
As shown in table 3, various oxides can be divided into the MgO with the work function value that is lower than Ag, and the SnO with the work function value that is higher than Ag
2, In
2O
3, CuO, ZnO, this 2 class of CdO.
As everyone knows, the electric arc that contact produced when disconnecting is to produce the metallic phase arc that metal ion and electronics be made of of duration below 2ms at the beginning, then changes the gaseous phase arc that is made of nitrogen ion and oxonium ion into.Can find out obviously that by the result under the 42V of Fig. 6 the electric arc under the dc high voltage load nearly all is gaseous phase arc, how suppress the important channel that continues to become the purpose that reaches control dc high voltage load of gaseous phase arc.
Here, be example with the Ag-MgO electric contact material, in metallic phase arc, low MgO concentrates the release electronics by work function, produces Ionized Mg simultaneously thereupon
2+Then, the nitrogen in electric arc in the atmosphere and oxygen ionized makes electric arc become gaseous phase arc, but this moment is because the Mg that metallic phase arc produces
2+And O
2-In conjunction with generating MgO, so the concentration of gas ion obviously reduces, the continuing of gaseous phase arc just is suppressed.Phenomenon can illustrate that the Ag-MgO electric contact material compares with Ag thus, possesses the characteristic that shortens the arc duration.
Then, be example with the electric contact material that only forms by Ag, in the metallic phase arc that produces when contact disconnects, the Ag ionization changes Ag into
+Then, when changing gaseous phase arc into, because Ag
+Not with N
2And O
2Ionized product reaction so gaseous phase arc is had no effect, therefore can not be apparent in the following suppression characteristic to electric arc of dc high voltage load.
The situation of the electric contact material of Ag-CuO is as described below.In the metallic phase arc that when contact disconnects, produces, because being concentrated, the low Ag of work function value discharges, so the Ag ionization changes Ag into
+Be released.Then, even change gaseous phase arc into, because Ag
+Also not with N
2And O
2Ionized product reaction is so have no effect.But CuO was exposed to situation under the high temperature because of electric arc under, CuO caused thermal decomposition, and it is oxygen ionized that discharge this moment, helped continuing of gaseous phase arc.Can illustrate thus why Ag-CuO is longer than the arc duration of Ag.In addition, high more this phenomenon of current value is obvious more also can access understanding.
Added SnO
2+ In
2O
3Example in the past 1 and added SnO
2The phenomenon of contactor material of example in the past 2 identical with the phenomenon of the electric contact material of above-mentioned Ag-CuO.
For the foregoing reasons, infer and to have only MgO to have the effect of the electric arc of this specific inhibition dc high voltage load.Therefore, can infer the material that has effect same beyond the MgO, should be work function value be lower than Ag, with the strong material of adhesion of oxygen.
Switching device of the present invention can be used in control and is equipped on as the hybrid automobile of young mobile and the dc high voltage load of electric automobile.It has major contribution to the further improvement of young mobile, helps the popularizing of young mobile from now on.
Claims (6)
1. high-voltage loaded switch device, it is characterized in that, switch block with singly-bound disrupted configuration, these parts possess that Ag by the MgO particle of 2.0～20.0 weight % and surplus branch forms, be dispersed with the contact element that the electric contact material of MgO particle constitutes in the Ag matrix, and control direct voltage 36～400V, rated current 0.01～15A's is high-voltage loaded.
2. high-voltage loaded switch device as claimed in claim 1, its feature are that also MgO is 8.1～15.0 weight %.
3. high-voltage loaded switch device as claimed in claim 1 or 2, its feature also be, electric contact material is the material that is dispersed with the MgO particle of average grain diameter 1.1～6.0 μ m in the Ag matrix that Ag powder and MgO powder form by mixing.
4. high-voltage loaded switch device, it is characterized in that, switch block with two key disrupted configurations, these parts possess that Ag by the MgO particle of 2.0～20.0 weight % and surplus branch forms, be dispersed with the contact element that the electric contact material of MgO particle constitutes in the Ag matrix, and control direct voltage 36～400V, rated current 5～500A's is high-voltage loaded.
5. high-voltage loaded switch device as claimed in claim 4, its feature are that also MgO is 8.1～15.0 weight %.
6. as claim 4 or 5 described high-voltage loaded switch devices, its feature also is, electric contact material is the material that is dispersed with the MgO particle of average grain diameter 1.1～6.0 μ m in the Ag matrix that Ag powder and MgO powder form by mixing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003352657A JP4359476B2 (en) | 2003-10-10 | 2003-10-10 | High voltage load switchgear |
| JP2003352657 | 2003-10-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1606112A true CN1606112A (en) | 2005-04-13 |
| CN1300813C CN1300813C (en) | 2007-02-14 |
Family
ID=34543525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100856013A Expired - Fee Related CN1300813C (en) | 2003-10-10 | 2004-10-09 | High-voltage loaded switch device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4359476B2 (en) |
| CN (1) | CN1300813C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467986A (en) * | 2010-11-04 | 2012-05-23 | 中国探针股份有限公司 | Arc erosion-resistant electric contact material of silver-based cadmium-free composite material |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7566437B2 (en) * | 2006-03-31 | 2009-07-28 | Umicore Ag & Co. Kg | Process for manufacture of silver-based composite powders for electrical contact materials and composite powders so produced |
| JP5342931B2 (en) * | 2009-06-05 | 2013-11-13 | マブチモーター株式会社 | Sliding contact material, clad composite material and motor |
| JP7230001B2 (en) * | 2018-03-16 | 2023-02-28 | 田中貴金属工業株式会社 | DC high voltage relays and contact materials for DC high voltage relays |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09111367A (en) * | 1995-10-12 | 1997-04-28 | Mitsubishi Materials Corp | Ag-magnesium oxide electrical contact material excellent in deposition resistance and consumption resistance |
| JP2000309834A (en) * | 1999-04-23 | 2000-11-07 | Tanaka Kikinzoku Kogyo Kk | On-vehicle electrical contact material, and on-vehicle relay or switch using the same |
-
2003
- 2003-10-10 JP JP2003352657A patent/JP4359476B2/en not_active Expired - Fee Related
-
2004
- 2004-10-09 CN CNB2004100856013A patent/CN1300813C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467986A (en) * | 2010-11-04 | 2012-05-23 | 中国探针股份有限公司 | Arc erosion-resistant electric contact material of silver-based cadmium-free composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4359476B2 (en) | 2009-11-04 |
| JP2005116480A (en) | 2005-04-28 |
| CN1300813C (en) | 2007-02-14 |
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