CN104316794A - Device for testing electric performance of contact material of alternating-current contactor and method for using the device to test electric performance of contact material - Google Patents
Device for testing electric performance of contact material of alternating-current contactor and method for using the device to test electric performance of contact material Download PDFInfo
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- CN104316794A CN104316794A CN201410567011.8A CN201410567011A CN104316794A CN 104316794 A CN104316794 A CN 104316794A CN 201410567011 A CN201410567011 A CN 201410567011A CN 104316794 A CN104316794 A CN 104316794A
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Abstract
The invention discloses a device for testing electric performance of contact material of an alternating-current contactor and a method for using the device to test the electric performance of the contact material and belongs to the field of low-voltage electric appliance and electric material. The device for testing the electric performance of the contact material of the alternating-current contactor and the method for using the device to test the electric performance of the contact material are aimed to solve the problem that an existing alternating-current contactor reliability testing equipment is incapable of realizing the contact opening clearance regulation and contact material change when measuring the electric performance of the contactor. The opening clearance between a static contact and a movable contact is regulated through the vertical sliding of a vertical sliding table, and then the problem that the existing alternating-current contactor reliability testing equipment is incapable of realizing the contact opening clearance regulation is solved. By means of a movable contact bridge and a static reed, movable contacts and static contacts made of different contact materials are changed more conveniently to obtain the electric performance of contacts made of different contact materials, and meanwhile, the problem that the existing alternating-current contactor testing device is incapable of avoiding the influence of the mechanical regulating parameters of the contactor on the electric performance is solved. The device for testing the electric performance of the contact material of the alternating-current contactor and the method for using the device to test the electric performance of the contact material are also suitable for the life span test, off and on ability test, and short circuit connection and breaking ability test for the contactor.
Description
Technical field
The present invention relates to low-voltage electrical apparatus and electrical material field.
Background technology
A.C. contactor is a kind of robotization switch being used for being switched on or switched off load-carrying interchange main circuit or Large Copacity control circuit; major control is to liking motor; in addition also for other electrical loads; as electric heater; electric welding machine; light fixture, contactor can not only be connected and cut off circuit, but also has the effect of low-voltage release guard.Contactor control capability is large, and being applicable to frequent operation and far distance controlled, is one of critical elements in automatic control system.Therefore the reliability of A.C. contactor is most important in the production of reality, needs to test the key characteristic parameter in alternating current contactor electrical endurance process.
The contact material of A.C. contactor is the carrier completing conducting, breaking current function in it, and therefore its electric arc and electrical contact performance are the keys affecting A.C. contactor electric life and reliability.In recent years, the demand of A.C. contactor manufacturer is generally embodied in the aspects such as product " miniaturization, low-power consumption, the long-life, highly reliable ", therefore proposes more and more higher requirement for supporting contact material.Under this drives, for the research work that contact material constituent optimization is carried out, the electric life of electrical equipment is made to be improved to a certain extent.As everyone knows, the electric life of A.C. contactor and switch load condition, mechanical motion characteristic, working environment atmosphere, contact material group grading factors are directly related, and the corresponding relation of therefore single contact material component and the electric life of A.C. contactor is also not deterministic.
Existing A.C. contactor test unit mainly concentrates on fail-test aspect.The limitation of such proving installation is mainly reflected in: (1) carries out fail-test to contactor finished product, judge whether contactor lost efficacy and record with parameters such as contact drops in each course of action, contactor machinery adjustment parameter cannot be completed as the impact on its electrical property such as clearance between open contacts.(2) impact of contact material on contactor electrical property cannot conveniently be studied.(3) can only measure the electric current and voltage of contactor, the measurement to contact melting welding force parameter cannot be realized.
Summary of the invention
The present invention can not realize to solve existing A.C. contactor reliability-test equipment the problem that the contactor electrical property under the adjustable and replaceable condition of contact material of clearance between open contacts measures, and is also cannot complete contactor machinery adjustment parameter to the demand of the impact of its electrical property to meet existing A.C. contactor test unit.Propose for AC contactor touch head material electric performance test device and adopt the method for this device to test contact material electrical property.
For the device of AC contactor touch head material electric performance test, this device comprise test A.C. contactor and stationary installation, two clearance between open contacts adjusting gears, six power measurement components, six static contact installation units and arc-extinguish chambers;
Test A.C. contactor and stationary installation thereof comprise card extender and three moving contact installation units, and each moving contact installation unit comprises one and moves tactile bridge back-up block, a dynamic tactile bridge stay hook and a dynamic tactile bridge;
Described tested contactor is fixed on the upper surface of card extender, and the lower surface of three moving contact installation units is all adhesively fixed with the upper surface carrying contact of tested contactor, and three moving contact installation units are longitudinally coaxial;
Moving in moving contact installation unit touches bridge stay hook, dynamic tactile bridge back-up block and dynamic tactile bridge one_to_one corresponding, and the described dynamic bridge stay hook that touches is mounted on the dynamic tactile bridge back-up block of correspondence, and corresponding dynamic tactile bridge is mounted on described dynamic tactile bridge stay hook,
The bridge body of a bridge each side has a moving contact mounting hole to dynamic touching, and described moving contact mounting hole is for installing moving contact to be measured;
Static contact installation unit comprises teflon partiting thermal insulation cylinder, static contact spring piece web member and static contact spring piece; Static contact spring piece, static contact spring piece web member and teflon partiting thermal insulation cylinder are from top to bottom fixedly connected sequentially; The upper surface of static contact spring piece is provided with static contact installing zone, and described static contact installing zone is for installing static contact to be measured;
Three moving contact installation units and six static contact installation units form three groups of contact unit; Often organize contact unit and comprise a moving contact installation unit and two static contact installation units, and the moving contact mounting hole that dynamic in moving contact installation unit touches the bridge body of a bridge left and right sides is just right with the static contact installing zone in static contact installation unit respectively;
Power measurement component is fixed on the bottom of static contact installation unit, for measuring force signal when static contact to be measured and moving contact adhesive and disjunction;
Clearance between open contacts adjusting gear comprises vertical slide unit, right angle fixed block, horizontal sliding table, T-shaped card extender; The surface level of right angle fixed block is positioned on horizontal sliding table, and is slidably connected with this horizontal sliding table, and the side of vertical slide unit and the vertical plane of described right angle fixed block are slidably connected, and the transverse slat of T-shaped card extender is fixedly connected with the opposite side of described vertical slide unit; The riser of T-shaped card extender is horizontally disposed with;
Two clearance between open contacts adjusting gears lay respectively at the left and right sides of described test A.C. contactor and stationary installation thereof, and mirror image is arranged;
Described power measurement component is also fixed on the upper surface of the riser of the T-shaped card extender of described clearance between open contacts adjusting gear;
Arc-extinguish chamber is a bottomless hollow rectangular parallelepiped, described arc-extinguish chamber inside is divided into A district, B district and C district by dividing plate, and each intra-zone is fixed with two arc extinguishing grid pieces, and described two arc extinguishing grid pieces are staggered relatively, the distance of described two arc extinguishing grid pieces is described dynamic 1.3 times of touching bridge length, and arc-extinguish chamber is opening down and be positioned on the riser of T-shaped card extender of two clearance between open contacts adjusting gears;
Each intra-zone all covers a described contact unit; And the dynamic tactile bridge of described contact unit and static contact spring piece are between staggered relatively two arc extinguishing grid pieces.
For the device of AC contactor touch head material electric performance test, it also comprises shock insulation base, and described card extender is fixed on the upper surface of shock insulation base; Horizontal sliding table is connected with the upper surface slide of shock insulation base.
For the device of AC contactor touch head material electric performance test, it also comprises three Hall current sensors, three No. two Hall current sensors, three Hall voltage sensors, signal conditioning circuit, data acquisition processing circuit and host computers;
Contact voltage signal when adhesive and disjunction for gathering contact voltage signal when a pair moving contact and static contact adhesive and disjunction, and is sent to signal conditioning circuit by each Hall voltage sensor;
Coil current signal when each Hall current sensor is for gathering a pair moving contact and static contact adhesive and disjunction in tested contactor, and coil current signal when adhesive and disjunction is sent to signal conditioning circuit;
Contact current signal when adhesive and disjunction for gathering contact current signal when a pair moving contact and static contact adhesive and disjunction, and is sent to signal conditioning circuit by each No. two Hall current sensors;
Force signal when adhesive and disjunction for gathering force signal when a pair moving contact and static contact adhesive and disjunction, and is sent to signal conditioning circuit by each piezoelectric quartz force sensor;
Signal conditioning circuit is used for the force signal when contact voltage signal of reception, coil current signal, contact current signal and adhesive and disjunction to be sent to data acquisition processing circuit;
Data acquisition processing circuit be used for contact voltage signal when adhesive and disjunction, adhesive and disjunction time coil current signal adhesive and disjunction time contact current signal and force signal process, and the unit for electrical property parameters obtained after output processing shows to host computer.
Adopt the method for the device to test contact material electrical property being used for AC contactor touch head material electric performance test, the method comprises:
Step one: a pair moving contact to be measured and static contact are connected in the current supply circuit of resistive load;
Step 2: the position of adjustment horizontal sliding table and vertically slide unit, make static contact to be measured and moving contact coaxial, and the distance of static contact to be measured and moving contact reaches contact opens apart from setting value;
Step 3: the control coil energising of tested contactor, moving contact to be measured and stationary contact adhesive, contact voltage signal during Hall voltage sensor collection adhesive is sent to signal conditioning circuit, and this coil current signal is also sent to signal conditioning circuit by a coil current signal during Hall current sensor collection adhesive in tested contactor; No. two Hall current sensors gather contact current signal when a pair moving contact and static contact adhesive; Described force signal is also sent to signal conditioning circuit by force signal during piezoelectric quartz force sensor collection adhesive; Signal after described signal conditioning circuit conditioning is sent to data acquisition processing circuit;
Step 4: the control coil power-off of tested contactor, moving contact to be measured and static contact disjunction, contact voltage signal during Hall voltage sensor collection disjunction is sent to signal conditioning circuit, and this coil current signal is also sent to signal conditioning circuit by a coil current signal during Hall current sensor collection disjunction in tested contactor; No. two Hall current sensors gather contact current signal when a pair moving contact and static contact disjunction; Described force signal is also sent to signal conditioning circuit by force signal during piezoelectric quartz force sensor collection disjunction; Signal after described signal conditioning circuit conditioning is sent to data acquisition processing circuit;
Step 5: data acquisition processing circuit processes to the data received the unit for electrical property parameters obtaining contactor; The unit for electrical property parameters of described contactor comprises melting welding power, impact force, static pressure, closure time, trip time and arc time.
The present invention is slided up and down by vertical slide unit, thus achieves the adjustment of the clearance between open contacts between static contact and moving contact, solves existing A.C. contactor reliability-test equipment and can not realize the adjustable problem of clearance between open contacts.Dynamic touch bridge and static contact spring piece make to change the moving contact of different contact material and static contact convenient, thus obtain the electrical property of the contact of different contact material further, meet existing A.C. contactor test unit simultaneously and cannot complete contactor machinery adjustment parameter to the demand of the impact of its electrical property.The present invention be also applicable to contactor durability test, turn off and the test of making capacity, short circuit making and pitch capability test.
Accompanying drawing explanation
Fig. 1 is the part-structure figure of the described device for AC contactor touch head material electric performance test;
Fig. 2 is the one-piece construction figure of the described device for AC contactor touch head material electric performance test;
Fig. 3 is side view of the present invention;
Fig. 4 is the structural drawing touching bridge stay hook;
Fig. 5 is the structural drawing touching bridge;
Fig. 6 is tested contactor and the dynamic structural drawing touching bridge back-up block;
Fig. 7 is the structural representation of tested contactor;
Fig. 8 is the structural drawing of clearance between open contacts adjusting gear;
Fig. 9 is the structural drawing of power measurement component;
Figure 10 is the cut-away view of Fig. 8;
Figure 11 is the structural drawing of arc-extinguish chamber;
Figure 12 is the device circuit annexation figure described in embodiment five;
Force signal schematic diagram when Figure 13 is contact disconnection;
Force signal schematic diagram when Figure 14 is the closing of contact;
Figure 15 is contact voltage during the closing of contact and contact current schematic diagram;
Figure 16 is contact voltage and the contact current schematic diagram of contact off period;
Reference numeral in figure: test A.C. contactor and stationary installation 1 thereof, clearance between open contacts adjusting gear 2, power measurement component 3, shock insulation base 4, tested contactor 5, card extender 6, dynamic tactile bridge back-up block 7, dynamic tactile bridge stay hook 8, dynamic tactile bridge 9, moving contact 10, vertical slide unit 11, right angle fixed block 12, horizontal sliding table 13, T-shaped card extender 14, transverse slat 14-1, riser 14-2, teflon partiting thermal insulation cylinder 15, static contact spring piece web member 16, static contact spring piece 17, static contact 18, screw 19, screw 20, piezoelectric quartz force sensor 21, screw 22, arc extinguishing grid pieces 23, arc-extinguish chamber 24, Hall current sensor 25, three Hall voltage sensors 26, signal conditioning circuit 27, data acquisition processing circuit 28 and host computer 29, A represents A district, B represents B district, C represents C district, carry contact 5-1, dynamic iron core 5-2, coil 5-3, static iron core 5-4, spring 5-5 and shell 5-6.
Embodiment
Embodiment one, illustrate present embodiment referring to figs. 1 through Figure 11, the device for AC contactor touch head material electric performance test described in present embodiment, it comprises tested contactor 5, and tested contactor 5 comprises a year contact 5-1, dynamic iron core 5-2, coil 5-3, static iron core 5-4, spring 5-5 and a shell 5-6; Dynamic iron core 5-2, static iron core 5-4 and carry a contact 5-1 and be " E " shape, described dynamic iron core 5-2 and static iron core 5-4 is staggered relatively, and the opening of dynamic iron core 5-2 and the opening of static iron core 5-4 just right; Coil 5-3 is positioned at the just right opening of dynamic iron core 5-2 and the opening of static iron core 5-4; Spring 5-5 is placed in the middle of coil 5-3; Carry contact 5-1 opening up and be fixed on the upper surface of described dynamic iron core 5-2, the first half of described year contact 5-1 is through the top of shell 5-6; Described dynamic iron core 5-2, coil 5-3, static iron core 5-4 and spring 5-5 are all positioned at the inside of shell 5-6;
This device also comprises test A.C. contactor and stationary installation 1, two clearance between open contacts adjusting gears 2, six power measurement components 3, six static contact installation units and arc-extinguish chamber 24;
Test A.C. contactor and stationary installation 1 thereof comprise card extender 6 and three moving contact installation units, and each moving contact installation unit comprises one and moves the dynamic tactile bridge stay hook 8 of tactile bridge back-up block 7, and a dynamic tactile bridge 9;
Described tested contactor 5 is fixed on the upper surface of card extender 6, and the lower surface of three moving contact installation units is all adhesively fixed with the upper surface carrying contact 5-1 of tested contactor 5, and three moving contact installation units are longitudinally coaxial;
Moving in moving contact installation unit touches bridge stay hook 8, dynamic tactile bridge back-up block 7 and dynamic tactile bridge 9 one_to_one corresponding, and the described dynamic bridge stay hook 8 that touches is mounted on the dynamic tactile bridge back-up block 7 of correspondence, and corresponding dynamic tactile bridge 9 is mounted on described dynamic tactile bridge stay hook 8,
Bridge 9 body of a bridge each side has a moving contact mounting hole to dynamic touching, and described moving contact mounting hole is for installing moving contact 10 to be measured;
Static contact installation unit comprises teflon partiting thermal insulation cylinder 15, static contact spring piece web member 16 and static contact spring piece 17; Static contact spring piece 17, static contact spring piece web member 16 and teflon partiting thermal insulation cylinder 15 are from top to bottom fixedly connected sequentially; The upper surface of static contact spring piece 17 is provided with static contact installing zone, and described static contact installing zone is for installing static contact 18 to be measured;
Three moving contact installation units and six static contact installation units form three groups of contact unit; Often organize contact unit and comprise a moving contact installation unit and two static contact installation units, and the moving contact mounting hole that dynamic in moving contact installation unit touches bridge 9 body of a bridge left and right sides is just right with the static contact installing zone in static contact installation unit respectively;
Power measurement component 3 is fixed on the bottom of static contact installation unit, for measuring force signal when static contact 18 to be measured and moving contact 10 adhesive and disjunction;
Clearance between open contacts adjusting gear 2 comprises vertical slide unit 11, right angle fixed block 12, horizontal sliding table 13, T-shaped card extender 14; The surface level of right angle fixed block 12 is positioned on horizontal sliding table 13, and be slidably connected with this horizontal sliding table 13, the side of vertical slide unit 11 and the vertical plane of described right angle fixed block 12 are slidably connected, and the transverse slat 14-1 of T-shaped card extender 14 is fixedly connected with the opposite side of described vertical slide unit 11; The riser 14-2 of T-shaped card extender 14 is horizontally disposed with;
Two clearance between open contacts adjusting gears 2 lay respectively at the left and right sides of described test A.C. contactor and stationary installation 1 thereof, and mirror image is arranged;
Described power measurement component 3 is also fixed on the upper surface of the riser 14-2 of the T-shaped card extender 14 of described clearance between open contacts adjusting gear 2;
Arc-extinguish chamber 24 is a bottomless hollow rectangular parallelepiped, described arc-extinguish chamber 24 inside is divided into A district, B district and C district by dividing plate, and each intra-zone is fixed with two arc extinguishing grid pieces 23, and described two arc extinguishing grid pieces 23 are staggered relatively, the distance of described two arc extinguishing grid pieces 23 is described dynamic 1.3 times of touching bridge 9 length, and arc-extinguish chamber 24 is opening down and be positioned on the riser 14-2 of the T-shaped card extender 14 of two clearance between open contacts adjusting gears 2;
Each intra-zone all covers a described contact unit; And the dynamic tactile bridge 9 of described contact unit and static contact spring piece 17 are between staggered relatively two arc extinguishing grid pieces 23.
The present invention, using typical A.C. contactor as measuring object, proposes a kind of contact material electric performance testing device for A.C. contactor and method, for measuring the electrical property in the actual band year course of action of contactor.Electrical property comprises the parameters such as coil current, contact voltage, contact current, melting welding power, impact force, static pressure, closure time, trip time, arc time and arcing energy.The purposes of arc-extinguish chamber is to extinguish safely the electric arc produced in three-phase contact breaking course.Wherein, arcing energy is that the electric current and voltage by obtaining arcing process is multiplied and does integration to the time and obtain, and its principle belongs to prior art.
The present invention is slided up and down by vertical slide unit, thus achieves the adjustment of the clearance between open contacts between static contact and moving contact, solves existing A.C. contactor measurement mechanism and can not realize the adjustable problem of clearance between open contacts.Dynamic touch bridge 9 and static contact spring piece 17 make to change the moving contact of different contact material and static contact convenient, thus obtain the electrical property of the contact of different contact material further, meet existing A.C. contactor test unit simultaneously and cannot complete contactor machinery adjustment parameter to the demand of the impact of its electrical property.
Embodiment two, present embodiment further illustrate the device for AC contactor touch head material electric performance test described in embodiment one, and in present embodiment, described power measurement component 3 is piezoelectric quartz force sensor 21.
Embodiment three, present embodiment further illustrate the device for AC contactor touch head material electric performance test described in embodiment one, in present embodiment, described described static contact spring piece 17 is connected with static contact spring piece web member 16 by screw 22, described static contact spring piece web member 16 is connected with described teflon partiting thermal insulation cylinder 15 by screw 20, and described piezoelectric quartz force sensor 21 is connected with teflon partiting thermal insulation cylinder 15 by screw 19.
Embodiment four, the device for AC contactor touch head material electric performance test according to embodiment one further illustrate, and in present embodiment, it also comprises shock insulation base 4, and described card extender 6 is fixed on the upper surface of shock insulation base 4; Horizontal sliding table 13 is connected with the upper surface slide of shock insulation base 4.
The effect of shock insulation base 4 is shockproof.
Embodiment five, reference Figure 12 illustrate present embodiment, present embodiment further illustrates the device for AC contactor touch head material electric performance test described in embodiment one, in present embodiment, it also comprises three Hall current sensors, 25, three No. two Hall current sensors 30, three Hall voltage sensors 26, signal conditioning circuit 27, data acquisition processing circuit 28 and host computers 29;
Contact voltage signal when adhesive and disjunction for gathering contact voltage signal when a pair moving contact 10 and static contact 18 adhesive and disjunction, and is sent to signal conditioning circuit 27 by each Hall voltage sensor 26;
Coil current signal when each Hall current sensor 25 is for gathering a pair moving contact 10 and static contact 18 adhesive and disjunction in tested contactor 5, and coil current signal when adhesive and disjunction is sent to signal conditioning circuit 27;
Contact current signal when adhesive and disjunction for gathering contact current signal when a pair moving contact 10 and static contact 18 adhesive and disjunction, and is sent to signal conditioning circuit 27 by each No. two Hall current sensors 30;
Force signal when adhesive and disjunction for gathering force signal when a pair moving contact 10 and static contact 18 adhesive and disjunction, and is sent to signal conditioning circuit 27 by each piezoelectric quartz force sensor 21;
Signal conditioning circuit 27 is for being sent to data acquisition processing circuit 28 by the force signal when contact voltage signal of reception, coil current signal, contact current signal and adhesive and disjunction;
Data acquisition processing circuit 28 for contact voltage signal when adhesive and disjunction, adhesive and disjunction time coil current signal, adhesive and disjunction time contact current signal and force signal process, and the unit for electrical property parameters obtained after output processing shows to host computer 29.
Device of the present invention comprises test A.C. contactor and stationary installation, clearance between open contacts adjusting gear, power measurement component, shock insulation base and arc-extinguish chamber.By this device again in conjunction with three Hall current sensors, 25, three No. two Hall current sensors 30, three Hall voltage sensors 26, signal conditioning circuit 27, data acquisition processing circuit 28 and host computers 29, not only can complete the impact of different contact material on A.C. contactor electric life and reliability to test, also can realize the parameters such as contactor loading condition, clearance between open contacts simultaneously and the impact of contact material electrical property is tested.
The method of embodiment six, the device to test contact material electrical property for AC contactor touch head material electric performance test of employing described in embodiment five, the method comprises:
Step one: a pair moving contact to be measured and static contact are connected in the current supply circuit of resistive load;
Step 2: the position of adjustment horizontal sliding table 13 and vertically slide unit 11, make static contact 18 to be measured and moving contact 9 coaxial, and the distance of static contact 18 to be measured and moving contact 9 reaches contact opens apart from setting value;
Step 3: the control coil energising of tested contactor 5, moving contact 10 to be measured and stationary contact 18 adhesive, contact voltage signal when Hall voltage sensor 26 gathers adhesive is sent to signal conditioning circuit 27, and this coil current signal is also sent to signal conditioning circuit 27 by a coil current signal when Hall current sensor 25 gathers adhesive in tested contactor 5; No. two Hall current sensors 30 gather contact current signal when a pair moving contact 10 and static contact 18 adhesive; Described force signal is also sent to signal conditioning circuit 27 by force signal when piezoelectric quartz force sensor 21 gathers adhesive; Signal after described signal conditioning circuit 27 is nursed one's health is sent to data acquisition processing circuit 28;
Step 4: the control coil power-off of tested contactor 5, moving contact 9 to be measured and static contact 18 disjunction, contact voltage signal when Hall voltage sensor 26 gathers disjunction is sent to signal conditioning circuit 27, and this coil current signal is also sent to signal conditioning circuit 27 by a coil current signal when Hall current sensor 25 gathers disjunction in tested contactor 5; No. two Hall current sensors 30 gather contact current signal when a pair moving contact 10 and static contact 18 disjunction; Described force signal is also sent to signal conditioning circuit 27 by force signal when piezoelectric quartz force sensor 21 gathers disjunction; Signal after described signal conditioning circuit 27 is nursed one's health is sent to data acquisition processing circuit 28;
Step 5: data acquisition processing circuit 28 processes to the data received the unit for electrical property parameters obtaining contactor; The unit for electrical property parameters of described contactor comprises melting welding power, impact force, static pressure, closure time, trip time and arc time.
The control coil of tested contactor belongs to a part for the current supply circuit of resistive load, is prior art; Here control coil is coil 5-1.
Embodiment seven, reference Figure 13 illustrate present embodiment, present embodiment further illustrates the method for the employing described in embodiment six for the device to test contact material electrical property of AC contactor touch head material electric performance test, in present embodiment, the data acquisition processing circuit 28 described in step 5 to the method that the data received process the melting welding power obtained in the unit for electrical property parameters of contactor is:
Step C0, piezoelectric quartz force sensor to be calibrated;
Step C1, the force signal obtained according to the device being used for AC contactor touch head material electric performance test, and force signal when obtaining contact disjunction, described force signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step C2, navigate to the voltage alternating of force signal along region by threshold decision method;
Step C3, by arithmetic mean method, filtering is carried out to force signal, and obtain filtered force signal;
Step C4, navigated to the minimum value of described force signal by minimum value method;
Step C5, the minimum value of the force signal described in step C4 to be taken absolute value, be the size of melting welding power.
Embodiment eight, reference Figure 13 illustrate present embodiment, present embodiment further illustrates the method for the employing described in embodiment six for the device to test contact material electrical property of AC contactor touch head material electric performance test, in present embodiment,, the data acquisition processing circuit 28 described in step 5 to the method that the data received process the static pressure obtained in the unit for electrical property parameters of contactor is:
Steps A 1, the force signal obtained according to the device being used for AC contactor touch head material electric performance test, and force signal when obtaining contact disjunction, described force signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Steps A 2, navigated to the invariant region of force signal by threshold decision method, the size of the power of the invariant region of this force signal is static pressure.
Embodiment nine, reference Figure 14 illustrate present embodiment, present embodiment further illustrates the method for the employing described in embodiment six for the device to test contact material electrical property of AC contactor touch head material electric performance test, in present embodiment, the data acquisition processing circuit 28 described in step 5 to the method that the data received process the impact force obtained in the unit for electrical property parameters of contactor is:
Step B1, the force signal obtained according to the device being used for AC contactor touch head material electric performance test, and force signal when obtaining contact adhesive, described force signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step B2, navigated to the maximal value place of force signal by maximum value process, described maximal value is the size of impact force.
Embodiment ten, reference Figure 15 and Figure 16 illustrate present embodiment, present embodiment further illustrates the method for the employing described in embodiment six for the device to test contact material electrical property of AC contactor touch head material electric performance test, in present embodiment, the data acquisition processing circuit 28 described in step 5 to the data received process obtain closure time in the unit for electrical property parameters of contactor and the method for trip time as follows:
The acquisition methods of described closure time is:
Step D1, the contact voltage signal obtained according to the device being used for AC contactor touch head material electric performance test; Described contact voltage signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step D2, navigate to the alternation of contact voltage signal along mutation time by threshold decision method; Time from sending contactor closure signal to alternation edge occurs is closure time;
The acquisition methods of described trip time is:
Step e 1, the shock current signal obtained according to the device being used for AC contactor touch head material electric performance test; Described contact current signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step e 2, navigate to the alternation of contact current signal along mutation time by threshold decision method; Time from sending contactor cut-off signal to alternation edge occurs is off the time.
Embodiment 11, reference Figure 16 illustrate present embodiment, present embodiment further illustrates the method for the employing described in embodiment six for the device to test contact material electrical property of AC contactor touch head material electric performance test, in present embodiment, the data acquisition processing circuit 28 described in step 5 processes the method for the arc time obtained in the unit for electrical property parameters of contactor to the data received and is:
The contact voltage signal that the device that step F 1, basis are used for AC contactor touch head material electric performance test obtains and shock current signal; Described contact voltage signal and shock current signal are positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step F 2, navigated to contact voltage signal by threshold decision method alternation along the alternation of mutation time and contact current signal along mutation time; Time from sending contactor closure signal to alternation edge occurs is the arc time.
Embodiment 12, present embodiment are an embodiment.
According to standard GB/T 14048.1, device of the present invention can carry out contactor durability test, turn off and the test of making capacity, short circuit making and pitch capability test, below for durability test, provide the method for the electric performance test of A.C. contactor durability test.
Step one: a pair moving contact to be measured and static contact are connected in the current supply circuit of resistive load;
Step 2: the position of adjustment horizontal sliding table 13 and vertically slide unit 11, make static contact 18 to be measured and moving contact 9 coaxial, and the distance of static contact 18 to be measured and moving contact 9 reaches contact opens apart from setting value;
Step 3: the control coil energising of tested contactor 5, moving contact 10 to be measured and stationary contact 18 adhesive, contact voltage signal when Hall voltage sensor 26 gathers adhesive is sent to signal conditioning circuit 27,
This coil current signal is also sent to signal conditioning circuit 27 by a coil current signal when Hall current sensor 25 gathers adhesive in tested contactor 5; No. two Hall current sensors 30 gather contact current signal when a pair moving contact 10 and static contact 18 adhesive;
Described force signal is also sent to signal conditioning circuit 27 by force signal when piezoelectric quartz force sensor 21 gathers adhesive; Signal after described signal conditioning circuit 27 is nursed one's health is sent to data acquisition processing circuit 28;
Step 4: the control coil power-off of tested contactor 5, moving contact 9 to be measured and static contact 18 disjunction, contact voltage signal when Hall voltage sensor 26 gathers disjunction is sent to signal conditioning circuit 27,
This coil current signal is also sent to signal conditioning circuit 27 by a coil current signal when Hall current sensor 25 gathers disjunction in tested contactor 5; No. two Hall current sensors 30 gather contact current signal when a pair moving contact 10 and static contact 18 disjunction;
Described force signal is also sent to signal conditioning circuit 27 by force signal when piezoelectric quartz force sensor 21 gathers disjunction; Signal after described signal conditioning circuit 27 is nursed one's health is sent to data acquisition processing circuit 28;
Step 5: data acquisition processing circuit 28 processes to the data received the unit for electrical property parameters obtaining contactor; The unit for electrical property parameters of described contactor comprises melting welding power, impact force, static pressure, closure time, trip time and arc time;
Step 6: repeat above-mentioned steps one to step 6, until contactor or contact be damaged cannot regular event, and record the life-span of contactor and contact, measure the wear extent of contact.
Figure 13 to Figure 16 is the figure that the present embodiment obtains, and from the mark figure, can know the obtain manner of the method described in embodiment seven to ten one further.
Claims (10)
1. for the device of AC contactor touch head material electric performance test, it comprises tested contactor (5), and tested contactor (5) comprises a year contact (5-1), dynamic iron core (5-2), coil (5-3), static iron core (5-4), spring (5-5) and a shell (5-6); Dynamic iron core (5-2), static iron core (5-4) and a year contact (5-1) are " E " shape, described dynamic iron core (5-2) and static iron core (5-4) staggered relatively, and the opening of dynamic iron core (5-2) and the opening of static iron core (5-4) just right; Coil (5-3) is positioned at the opening of just right dynamic iron core (5-2) and the opening of static iron core (5-4); Spring (5-5) is placed in the middle of coil (5-3); Carry contact (5-1) opening up and be fixed on the upper surface of described dynamic iron core (5-2), described year contact (5-1) the first half through the top of shell (5-6); Described dynamic iron core (5-2), coil (5-3), static iron core (5-4) and spring (5-5) are all positioned at the inside of shell (5-6);
It is characterized in that, this device also comprise test A.C. contactor and stationary installation (1), two clearance between open contacts adjusting gears (2), six power measurement components (3), six static contact installation units and arc-extinguish chambers (24);
Test A.C. contactor and stationary installation (1) thereof comprise card extender (6) and three moving contact installation units, and each moving contact installation unit comprises one and moves tactile bridge back-up block (7), a dynamic tactile bridge stay hook (8) and a dynamic tactile bridge (9);
Described tested contactor (5) is fixed on the upper surface of card extender (6), the lower surface of three moving contact installation units is all adhesively fixed with the upper surface carrying contact (5-1) of tested contactor (5), and three moving contact installation units are longitudinally coaxial;
Moving in moving contact installation unit touches bridge stay hook (8), dynamic tactile bridge back-up block (7) and dynamic tactile bridge (9) one_to_one corresponding, the described dynamic bridge stay hook (8) that touches is mounted on corresponding dynamic tactile bridge back-up block (7), the corresponding dynamic bridge (9) that touches is mounted on described dynamic tactile bridge stay hook (8)
Bridge (9) body of a bridge each side has a moving contact mounting hole to dynamic touching, and described moving contact mounting hole is for installing moving contact (10) to be measured;
Static contact installation unit comprises teflon partiting thermal insulation cylinder (15), static contact spring piece web member (16) and static contact spring piece (17); Static contact spring piece (17), static contact spring piece web member (16) and teflon partiting thermal insulation cylinder (15) are from top to bottom fixedly connected sequentially; The upper surface of static contact spring piece (17) is provided with static contact installing zone, and described static contact installing zone is for installing static contact (18) to be measured;
Three moving contact installation units and six static contact installation units form three groups of contact unit; Often organize contact unit and comprise a moving contact installation unit and two static contact installation units, and the moving contact mounting hole that dynamic in moving contact installation unit touches bridge (9) body of a bridge left and right sides is just right with the static contact installing zone in static contact installation unit respectively;
Power measurement component (3) is fixed on the bottom of static contact installation unit, for measuring force signal when static contact (18) to be measured and moving contact (10) adhesive and disjunction;
Clearance between open contacts adjusting gear (2) comprises vertical slide unit (11), right angle fixed block (12), horizontal sliding table (13), T-shaped card extender (14); The surface level of right angle fixed block (12) is positioned on horizontal sliding table (13), and be slidably connected with this horizontal sliding table (13), the side of vertical slide unit (11) and the vertical plane at described right angle fixed block (12) are slidably connected, and the transverse slat (14-1) of T-shaped card extender (14) is fixedly connected with the opposite side of described vertical slide unit (11); The riser (14-2) of T-shaped card extender (14) is horizontally disposed with;
Two clearance between open contacts adjusting gears (2) lay respectively at the left and right sides of described test A.C. contactor and stationary installation (1) thereof, and mirror image is arranged;
Described power measurement component (3) is also fixed on the upper surface of the riser (14-2) of the T-shaped card extender (14) of described clearance between open contacts adjusting gear (2);
Arc-extinguish chamber (24) is a bottomless hollow rectangular parallelepiped, described arc-extinguish chamber (24) inside is divided into A district, B district and C district by dividing plate, and each intra-zone is fixed with two arc extinguishing grid pieces (23), and described two arc extinguishing grid pieces (23) are staggered relatively, the distance of described two arc extinguishing grid pieces (23) is described dynamic 1.3 times of touching bridge (9) length, and arc-extinguish chamber (24) is opening down and be positioned on the riser (14-2) of the T-shaped card extender (14) of two clearance between open contacts adjusting gears (2);
Each intra-zone all covers a described contact unit; And the dynamic tactile bridge (9) of described contact unit and static contact spring piece (17) are positioned between two arc extinguishing grid pieces (23) staggered relatively.
2. the device for AC contactor touch head material electric performance test according to claim 1, is characterized in that, described power measurement component (3) is piezoelectric quartz force sensor (21).
3. the device for AC contactor touch head material electric performance test according to claim 1, is characterized in that, it also comprises shock insulation base (4), and described card extender (6) is fixed on the upper surface of shock insulation base (4); Horizontal sliding table (13) is connected with the upper surface slide of shock insulation base (4).
4. the device for AC contactor touch head material electric performance test according to claim 1, it is characterized in that, it also comprises three No. one Hall current sensor (25), three No. two Hall current sensors (30), three Hall voltage sensors (26), signal conditioning circuit (27), data acquisition processing circuit (28) and host computers (29);
Contact voltage signal when adhesive and disjunction for gathering contact voltage signal when a pair moving contact (10) and static contact (18) adhesive and disjunction, and is sent to signal conditioning circuit (27) by each Hall voltage sensor (26);
Coil current signal when each Hall current sensor (25) is for gathering a pair moving contact (10) and static contact (18) adhesive and disjunction in tested contactor (5), and coil current signal when adhesive and disjunction is sent to signal conditioning circuit (27);
Contact current signal when adhesive and disjunction for gathering contact current signal when a pair moving contact (10) and static contact (18) adhesive and disjunction, and is sent to signal conditioning circuit (27) by each No. two Hall current sensors (30);
Force signal when adhesive and disjunction for gathering force signal when a pair moving contact (10) and static contact (18) adhesive and disjunction, and is sent to signal conditioning circuit (27) by each piezoelectric quartz force sensor (21);
Signal conditioning circuit (27) is for being sent to data acquisition processing circuit (28) by the force signal when contact voltage signal of reception, coil current signal, contact current signal and adhesive and disjunction;
Data acquisition processing circuit (28) for contact voltage signal when adhesive and disjunction, adhesive and disjunction time coil current signal, adhesive and disjunction time contact current signal and force signal process, and the unit for electrical property parameters obtained after output processing shows to host computer (29).
5. adopt the method for the device to test contact material electrical property for AC contactor touch head material electric performance test according to claim 4, it is characterized in that, the method comprises:
Step one: a pair moving contact to be measured and static contact are connected in the current supply circuit of resistive load;
Step 2: the position of adjustment horizontal sliding table (13) and vertically slide unit (11), make static contact (18) to be measured and moving contact (9) coaxial, and the distance of static contact to be measured (18) and moving contact (9) reach contact opens distance setting value;
Step 3: the control coil energising of tested contactor (5), moving contact (10) to be measured and stationary contact (18) adhesive, contact voltage signal during Hall voltage sensor (26) collection adhesive is sent to signal conditioning circuit (27), and this coil current signal is also sent to signal conditioning circuit (27) by coil current signal during Hall current sensor (25) collection adhesive in tested contactor (5); No. two Hall current sensors (30) gather contact current signal when a pair moving contact (10) and static contact (18) adhesive; Described force signal is also sent to signal conditioning circuit (27) by force signal during piezoelectric quartz force sensor (21) collection adhesive; Signal after described signal conditioning circuit (27) conditioning is sent to data acquisition processing circuit (28);
Step 4: the control coil power-off of tested contactor (5), moving contact (9) to be measured and static contact (18) disjunction, contact voltage signal during Hall voltage sensor (26) collection disjunction is sent to signal conditioning circuit (27), and this coil current signal is also sent to signal conditioning circuit (27) by coil current signal during Hall current sensor (25) collection disjunction in tested contactor (5); No. two Hall current sensors (30) gather contact current signal when a pair moving contact (10) and static contact (18) disjunction; Described force signal is also sent to signal conditioning circuit (27) by force signal during piezoelectric quartz force sensor (21) collection disjunction; Signal after described signal conditioning circuit (27) conditioning is sent to data acquisition processing circuit (28);
Step 5: data acquisition processing circuit (28) processes to the data received the unit for electrical property parameters obtaining contactor; The unit for electrical property parameters of described contactor comprises melting welding power, impact force, static pressure, closure time, trip time and arc time.
6. employing according to claim 5 is used for the method for the device to test contact material electrical property of AC contactor touch head material electric performance test, it is characterized in that, the data acquisition processing circuit (28) described in step 5 to the method that the data received process the melting welding power obtained in the unit for electrical property parameters of contactor is:
Step C0, piezoelectric quartz force sensor to be calibrated;
Step C1, the force signal obtained according to the device being used for AC contactor touch head material electric performance test, and force signal when obtaining contact disjunction, described force signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step C2, navigate to the voltage alternating of force signal along region by threshold decision method;
Step C3, by arithmetic mean method, filtering is carried out to force signal, and obtain filtered force signal;
Step C4, navigated to the minimum value of described force signal by minimum value method;
Step C5, the minimum value of the force signal described in step C4 to be taken absolute value, be the size of melting welding power.
7. employing according to claim 5 is used for the method for the device to test contact material electrical property of AC contactor touch head material electric performance test, it is characterized in that, the data acquisition processing circuit (28) described in step 5 to the method that the data received process the static pressure obtained in the unit for electrical property parameters of contactor is:
Steps A 1, the force signal obtained according to the device being used for AC contactor touch head material electric performance test, and force signal when obtaining contact disjunction, described force signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Steps A 2, navigated to the invariant region of force signal by threshold decision method, the size of the power of the invariant region of this force signal is static pressure.
8. employing according to claim 5 is used for the method for the device to test contact material electrical property of AC contactor touch head material electric performance test, it is characterized in that, the data acquisition processing circuit (28) described in step 5 to the method that the data received process the impact force obtained in the unit for electrical property parameters of contactor is:
Step B1, the force signal obtained according to the device being used for AC contactor touch head material electric performance test, and force signal when obtaining contact adhesive, described force signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step B2, navigated to the maximal value place of force signal by maximum value process, described maximal value is the size of impact force.
9. employing according to claim 5 is used for the method for the device to test contact material electrical property of AC contactor touch head material electric performance test, it is characterized in that, the data acquisition processing circuit (28) described in step 5 to the data received process obtain closure time in the unit for electrical property parameters of contactor and the method for trip time as follows:
The acquisition methods of described closure time is:
Step D1, the contact voltage signal obtained according to the device being used for AC contactor touch head material electric performance test; Described contact voltage signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step D2, navigate to the alternation of contact voltage signal along mutation time by threshold decision method; Time from sending contactor closure signal to alternation edge occurs is closure time;
The acquisition methods of described trip time is:
Step e 1, the shock current signal obtained according to the device being used for AC contactor touch head material electric performance test; Described contact current signal is positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step e 2, navigate to the alternation of contact current signal along mutation time by threshold decision method; Time from sending contactor cut-off signal to alternation edge occurs is off the time.
10. employing according to claim 5 is used for the method for the device to test contact material electrical property of AC contactor touch head material electric performance test, it is characterized in that, the data acquisition processing circuit (28) described in step 5 processes the method for the arc time obtained in the unit for electrical property parameters of contactor to the data received and is:
The contact voltage signal that the device that step F 1, basis are used for AC contactor touch head material electric performance test obtains and shock current signal; Described contact voltage signal and shock current signal are positioned at rectangular coordinate system, and horizontal ordinate is the time;
Step F 2, navigated to contact voltage signal by threshold decision method alternation along the alternation of mutation time and contact current signal along mutation time; Time from sending contactor closure signal to alternation edge occurs is the arc time.
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