CN202010937U - Grinding workbench of AC pulsed relay contacts - Google Patents
Grinding workbench of AC pulsed relay contacts Download PDFInfo
- Publication number
- CN202010937U CN202010937U CN2011200939971U CN201120093997U CN202010937U CN 202010937 U CN202010937 U CN 202010937U CN 2011200939971 U CN2011200939971 U CN 2011200939971U CN 201120093997 U CN201120093997 U CN 201120093997U CN 202010937 U CN202010937 U CN 202010937U
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- circuit
- pulse
- current
- relay contact
- relay
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Abstract
The utility model discloses a grinding workbench of AC (Alternating Current) pulsed relay contacts, comprising an AC-DC converting circuit, a pulse triggering control circuit and a bidirectional current source output circuit; the input terminal of the AC-DC conversion circuit is in connection with an AC power supply and provided with a first voltage output terminal and a second voltage output terminal; the first voltage output terminal is in connection with the pulse triggering control circuit, and the second voltage output terminal is in connection with a relay coil and used for controlling the close of a relay contact. The output terminal of the pulse triggering control circuit is in connection with the relay contact through the bidirectional current source output circuit and used for controlling outputting pulse current; the input terminal of the bidirectional current source output circuit is in connection with an AC power supply through a rectification circuit and a transformer. The outstanding features of the utility model are that in cases of not decomposing the relay, the oxide-film and fouling of the relay contact can be cleaned so as to restore the conductive performance of the relay contact.
Description
Technical field
The utility model relates to the grinding prosthetic device of relay contact, and particularly a kind of alternating-current pulse formula relay contact grinds workbench.
Background technology
At present, in the electric automatization field, switching regulator element miscellaneous is extensively used.The contact contact-making surface of switch element through regular meeting because oxidation, carbon distribution and stained and lost efficacy or performance descends.Traditional restorative procedure is to decompose after the element removed, takes out contact, and contact contact working face is carried out the artificial mechanism polishing.Can only scrap replacing for the hermetic switchgear of part.Traditional polishing process need decompose and assembling again switch element, the complicated operation labor intensive and again the fit clearance after the assembling be difficult to guarantee to return to original optimum state.Polishing also has extra loss to the contact copper face, and contact is only done once and just need be scrapped to twice polishing reparation usually, and the contact polishing is also higher to operating personnel's specification requirement.
In addition, DC pulse formula relay grinds workbench, and is better for the electric spark polishing effect of the contact that has resistance to oxidation coating, but then relatively poor for the grinding effect of the contact of copper oxidized surface.By adjustable alternating-current pulse current feedback circuit and adjustable voltage power supply, can use the alternating-current pulse electric current that contact is exchanged electric spark grinding, but this need two complete equipments.
Summary of the invention
In order to overcome the deficiency that above-mentioned relay contact exists in modes such as artificial polishing reparation, DC pulse formula electric spark grinding workbench, the purpose of this utility model is to provide a kind of alternating-current pulse formula relay contact to grind workbench.
The technical scheme that the utility model adopted: a kind of alternating-current pulse formula relay contact grinds workbench, comprise ac-dc converter circuit, Pulse-trigger control circuit and bidirectional current source follower circuit, the input of described ac-dc converter circuit is connected with AC power, and be provided with first voltage output end and second voltage output end, its first voltage output end is connected with the Pulse-trigger control circuit, second voltage output end is connected with relay coil, is used for the closure of control relay contact; The output of described Pulse-trigger control circuit is connected with relay contact by the bidirectional current source follower circuit, is used for control output pulse current; The input of described bidirectional current source follower circuit is connected with AC power through rectification circuit, transformer.
The output voltage of first voltage output end of above-mentioned ac-dc converter circuit is direct current 5V; The output voltage of second voltage output end is direct current 110V.
Above-mentioned AC power is the 220V alternating current.
The pulse current of above-mentioned bidirectional current source follower circuit output is positive and negative bidirectional pulse electric current.
Distinguishing feature of the present utility model is to realize simultaneously the function of adjustable alternating-current pulse current feedback circuit and adjustable voltage power supply two complete equipments required in the alternating-current pulse electric current contact process of lapping, under the situation of not decomposing relay, oxide-film and stained cleaning the to relay contact, thereby repair the electric conductivity of relay contact, avoided the complicated procedures of forming of modes such as artificial mechanism polishing simultaneously.
Description of drawings
Fig. 1 is stained and the equivalent circuit of the closed contact of oxidation;
Fig. 2 is a schematic block circuit diagram of the present utility model;
Fig. 3 is physical circuit figure of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing concrete structure of the present utility model is further described.
On the conductive contact surfaces of contacts such as electric switch, relay, dirt and local the air gap on the closed contact have formed a series of little electric capacity, and the copper-cupric oxide structure at the oxidation copper film place different with dirt, its rectifying effect has formed a series of equivalent diode, for a pair of equivalent-circuit model that has oxidation, stained closed contact is a capacitance-resistance diode parallel circuit, as shown in Figure 1.When repairing contact, because rectifying effect oxidation copper film can not be fully breakdown by unidirectional DC pulse.And on resistance, form voltage drop by applying the alternating-current pulse electric current, form charging voltage at the equivalent capacity two ends, when voltage greater than stained equivalent capacity and puncture the equivalent diode of withstand voltage and cupric oxide when withstand voltage, stained and oxide layer will be punctured by electric current and form spark discharge, the stained thing and the Cu oxide that adhere to can be cleaned out by electric spark, and the metal covering of contact or the coat of metal then can not be subjected to too big wearing and tearing.Because the equivalent diode that oxide forms has directionality, therefore, applies the weakness that alternating-current pulse can overcome dc pulse current.
As shown in Figure 2, alternating-current pulse formula relay contact described in the utility model grinds workbench, comprise ac-dc converter circuit (AC/DC), Pulse-trigger control circuit and bidirectional current source follower circuit, the input of described ac-dc converter circuit is connected with AC power (AC220V), and be provided with first voltage output end (DC5V) and second voltage output end (DC110V), its first voltage output end is connected with the Pulse-trigger control circuit, second voltage output end is connected with relay coil, is used for the closure of control relay contact; The output of described Pulse-trigger control circuit is connected with relay contact by the bidirectional current source follower circuit, is used for control output pulse current (alternating-current pulse electric current); The input of described bidirectional current source follower circuit is connected with AC power through rectification circuit, transformer.This grinding workbench also is provided with guidance panel, is used for switchgear, adjusts the amplitude, pulsewidth of alternating-current pulse electric current, the umber of pulse that applies of action once, and the output switch is used for applying of control impuls electric current.
During use, the out splice going splice of bidirectional current source follower circuit is connected on the corresponding binding post of relay contact to be repaired, second voltage output end of ac-dc converter circuit is connected on the binding post of relay coil, and adjust to the load voltage value of coil, console switch, output dc voltage is supplied with the bidirectional current source follower circuit behind 220V alternating current process transformer, the rectification circuit, the bidirectional current source follower circuit applies the alternating-current pulse electric current of specific size to the closed contact that needs place cleaning, grinds reparation.In addition, the ac-dc converter circuit output DC is pressed onto on the relay coil, closed contact (as normally open contact) to be repaired.
As shown in Figure 3, wherein, exchange input transformer, diode bridge rectifier circuit and support capacitor C 1 composition ac-dc conversion power supply.Triode T1, T2, diode D1, photo-coupler PC1, PC2, and resistance R 1～R6 formed the bidirectional current source follower circuit.The AC/DC ac-dc converter circuit is converted to dc source 110V (connect second voltage output end, be the relay coil power supply) and dc source 5V (connect first voltage output end, be time base circuit 555 power supplies) with AC power 220V.In addition, with time base circuit 555 (IC1) is that core and switch S 1, capacitor C 2, C3, resistance R 8 have been formed single positive pulse trigger control circuit, time base circuit 555 (IC2) has been formed single negative pulse trigger control circuit with switch S 2, capacitor C 4, C5, resistance R 9, is used for driving control photo-coupler PC1 and PC2.By adjusting the resistance of resistance R 6, can adjust the size of bidirectional current source follower circuit output current, adjust the resistance of resistance R 8 and R9, can adjust the output width of positive and negative pulse respectively, switch S 1 is used to trigger the output of positive pulse, switch S 2 is used to trigger the output of negative pulse, and a pulse is once exported in every action, and switch S 3 is used for the closed of control relay or disconnects.Binding post V0, G0 are used to connect relay contact to be polished, and binding post 5,6 is used to connect pending relay coil (this circuit disables is closed simultaneously with switch S 1, S2).
The utility model carries out electric spark grinding by using the alternating-current pulse electric current to relay contact, be implemented in the site of deployment of relay, under the situation of not decomposing relay, to the oxide-film or stained cleaning of relay contact, thus the electric conductivity of reparation relay contact.
Claims (5)
1. an alternating-current pulse formula relay contact grinds workbench, it is characterized in that, comprise ac-dc converter circuit, Pulse-trigger control circuit and bidirectional current source follower circuit, the input of described ac-dc converter circuit is connected with AC power, and be provided with first voltage output end and second voltage output end, its first voltage output end is connected with the Pulse-trigger control circuit, and second voltage output end is connected with relay coil, is used for the closure of control relay contact; The output of described Pulse-trigger control circuit is connected with relay contact by the bidirectional current source follower circuit, is used for control output pulse current; The input of described bidirectional current source follower circuit is connected with AC power through rectification circuit, transformer.
2. grind workbench according to the described alternating-current pulse formula of claim 1 relay contact, it is characterized in that the output voltage of first voltage output end of described ac-dc converter circuit is direct current 5V.
3. grind workbench according to the described alternating-current pulse formula of claim 1 relay contact, it is characterized in that the output voltage of second voltage output end of described ac-dc converter circuit is direct current 110V.
4. grind workbench according to the described alternating-current pulse formula of claim 1 relay contact, it is characterized in that described AC power is the 220V alternating current.
5. grind workbench according to the described alternating-current pulse formula of claim 1 relay contact, it is characterized in that, the pulse current of described bidirectional current source follower circuit output is positive and negative bidirectional pulse electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200939971U CN202010937U (en) | 2011-04-01 | 2011-04-01 | Grinding workbench of AC pulsed relay contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200939971U CN202010937U (en) | 2011-04-01 | 2011-04-01 | Grinding workbench of AC pulsed relay contacts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202010937U true CN202010937U (en) | 2011-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200939971U Expired - Lifetime CN202010937U (en) | 2011-04-01 | 2011-04-01 | Grinding workbench of AC pulsed relay contacts |
Country Status (1)
| Country | Link |
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| CN (1) | CN202010937U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610382A (en) * | 2014-11-13 | 2016-05-25 | 博泽哈尔施塔特汽车零件两合公司 | Method for operating electromotive adjusting device, and electromotive adjusting device |
-
2011
- 2011-04-01 CN CN2011200939971U patent/CN202010937U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610382A (en) * | 2014-11-13 | 2016-05-25 | 博泽哈尔施塔特汽车零件两合公司 | Method for operating electromotive adjusting device, and electromotive adjusting device |
| CN105610382B (en) * | 2014-11-13 | 2019-11-05 | 博泽哈尔施塔特汽车零件两合公司 | For running the method and electric adjusting device of electric adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111019 |