CN2521742Y - DC contactor - Google Patents
DC contactor Download PDFInfo
- Publication number
- CN2521742Y CN2521742Y CN 02215336 CN02215336U CN2521742Y CN 2521742 Y CN2521742 Y CN 2521742Y CN 02215336 CN02215336 CN 02215336 CN 02215336 U CN02215336 U CN 02215336U CN 2521742 Y CN2521742 Y CN 2521742Y
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- CN
- China
- Prior art keywords
- circuit
- silicon
- contactor
- rectification circuit
- reverse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an alternating current contactor which comprises a contactor shell body with a connecting end and is provided with a control circuit comprising a power supply control input transformer B (1), a rectification circuit (2), a silicon-controlled trigger circuit (3), and a silicon-controlled switch circuit (4), a secondary coil of the transformer B (1) is connected with the input end of the rectification circuit (2), the output of the rectification circuit (2) is connected with the silicon-controlled trigger circuit (3) which is connected with a silicon-controlled control electrode of the silicon-controlled switch circuit (4), the silicon-controlled switch circuit is formed by two pieces of silicon reversely connected in parallel, of which two connecting points are connected with connecting ends of the shell body, the output of the rectification circuit (2) is further connected with a relay J. The utility model has the advantages of non-contact, non-electric arc, high working frequency, and adaptability for high voltage till 380 V and high current.
Description
Technical field:
The utility model relates to A.C. contactor, relates in particular to the A.C. contactor of the big electric current that is used for AC electric power systems rated voltage to 380 volt.
Background technology:
Existing A.C. contactor, by contactor housing with terminals, solenoid, iron core, touch bridge, the contact of touching bridge forms, magnet control is touched bridge, makes the contact contact of contactor or separates, make controlled AC power supply on-off, its weak point is: produce electric arc, the easy loss of contact causes loose contact, reduction of service life, and can send noise, operating frequency is low again.
Summary of the invention:
The purpose of this utility model is to avoid above-mentioned weak point and length, high voltage, big electric current A.C. contactor of contactless, noiselessness, no electric arc, high-frequency, life-span is provided.
The purpose of this utility model can reach by following technical solution: the utility model A.C. contactor, comprise contactor housing with terminals, and be provided with by control power supply input transformer B, rectification circuit, thyristor gating circuit, the control circuit that the reverse-blocking tetrode thyristor circuit is formed, the secondary coil of transformer B connects the input of rectification circuit, the output of rectification circuit connects thyristor gating circuit, thyristor gating circuit connects the SCR control utmost point of reverse-blocking tetrode thyristor circuit, the reverse-blocking tetrode thyristor circuit is formed by two controllable silicon reverse parallel connections, two contacts in parallel connect the terminals on the housing, and the output of rectification circuit also connects relay J.
Advantage of the present utility model: contactless, no electric arc, noiselessness, long-life, high-frequency, suitable high-voltage large current.
Description of drawings:
Accompanying drawing 1 is the utility model circuit block diagram.
Accompanying drawing 2 is the utility model electrical schematic diagrams.
Embodiment:
As shown in Figure 1, the utility model A.C. contactor, comprise contactor housing with terminals, and be provided with by control power supply input transformer B1, rectification circuit 2, thyristor gating circuit 3, the control circuit that reverse-blocking tetrode thyristor circuit 4 is formed, the secondary coil of transformer B1 connects the input of rectification circuit 2, the output of rectification circuit 2 connects thyristor gating circuit 3, thyristor gating circuit 3 connects the SCR control utmost point of reverse-blocking tetrode thyristor circuit 4, the reverse-blocking tetrode thyristor circuit is formed by two controllable silicon reverse parallel connections, two contacts in parallel connect the terminals on the housing, the output of rectification circuit 2 also connects relay J, relay is provided with auxiliary contact, for often opening, normally-closed contact.As shown in Figure 2, the utility model rectification circuit 2 is by the secondary coil of control power supply input transformer B1, bridge rectification device DB107, filter capacitor C
4Form, be prior art, the also same R of transformer B1
1, D
1, LED is concatenated into working indicating, D
2Be fly-wheel diode.Thyristor gating circuit is the CMOC3063 photoelectrical coupler, the anode of its photoelectric reflection pipe connects with positive source, negative electrode connects with the negative pole of power supply, there are three CMOC3063 photoelectrical couplers to connect mutually, so that adaptation three phase mains, corresponding three photoelectrical couplers have three reverse-blocking tetrode thyristor circuit, the emitter of the light adopter of photoelectrical coupler, collector electrode are connected with the SCR control utmost point of reverse-blocking tetrode thyristor circuit 4 respectively, reverse-blocking tetrode thyristor circuit 4 is formed by two controllable silicon reverse parallel connections, the resistance of series connection, electric capacity R
6, L
1R
7, L
2R
8, L
3The controllable silicon that connects reverse parallel connection respectively absorbs as overvoltage, T
1, L
1T
2, L
2T
3, L
3Connect the terminals on the contactor housing respectively, R
3, R
4, R
5, be the current-limiting resistance of the SCR control utmost point, R
2It is the photoelectrical coupler current-limiting resistance.Contactor housing bottom surface connects the paliform aluminium alloy heat radiator, is prior art.During work, promptly when input control power supply, rectification circuit 2 output DC sources, relay J gets electric, and it is normally closed, the normally opened contact upset; Relay indicating light LED is bright; Positive voltage is through R
2To light, coupling positive pole, negative voltage are to the optocoupler negative pole, and optocoupler gets electric triggering controllable silicon, and positive half wave is because 3CT
2, 3CT
4, 3CT
6Conducting, 3CT
1, 3CT
3, 3CT
5End, negative half-wave is because 3CT
1, 3CT
3, 3CT
5Conducting, 3CT
2, 3CT
4, 3CT
6End, carry out repeatedly, realized that alternating current is open-minded.Disconnect the control end power supply, relay J discharges, and restore its normally-open normally-close contact, and LED extinguishes, controllable silicon 3CT
1-3CT
6Utmost point signal out of hand and turn-offing so exchange shutoff.
Claims (3)
1, a kind of A.C. contactor, comprise contactor housing with terminals, it is characterized in that: be provided with by control power supply input transformer B (1), rectification circuit (2), thyristor gating circuit (3), the control circuit that reverse-blocking tetrode thyristor circuit (4) is formed, the secondary coil of transformer B (1) connects the input of rectification circuit (2), the output of rectification circuit (2) connects thyristor gating circuit (3), thyristor gating circuit (3) connects the SCR control utmost point of reverse-blocking tetrode thyristor circuit (4), the reverse-blocking tetrode thyristor circuit is formed by two controllable silicon reverse parallel connections, two contacts in parallel connect the terminals on the housing, and the output of rectification circuit (2) also connects relay J.
2, by the described A.C. contactor of claim 1, it is characterized in that: transformer B (1) secondary coil is also with LED composition work indication loop.
3, by claim 1 or 2 described A.C. contactors, it is characterized in that: thyristor gating circuit is a photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215336 CN2521742Y (en) | 2002-01-22 | 2002-01-22 | DC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215336 CN2521742Y (en) | 2002-01-22 | 2002-01-22 | DC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2521742Y true CN2521742Y (en) | 2002-11-20 |
Family
ID=33694494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02215336 Expired - Fee Related CN2521742Y (en) | 2002-01-22 | 2002-01-22 | DC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2521742Y (en) |
-
2002
- 2002-01-22 CN CN 02215336 patent/CN2521742Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |