CN215644306U - Double-group three-phase solid relay - Google Patents
Double-group three-phase solid relay Download PDFInfo
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- CN215644306U CN215644306U CN202121918637.0U CN202121918637U CN215644306U CN 215644306 U CN215644306 U CN 215644306U CN 202121918637 U CN202121918637 U CN 202121918637U CN 215644306 U CN215644306 U CN 215644306U
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Abstract
The utility model relates to a double-group three-phase solid-state relay, which comprises a shell structure and a circuit structure; the shell structure comprises a bottom plate and a plastic shell fixed on the bottom plate; a circuit structure of two three-phase solid-state relays is arranged in the plastic shell; the circuit structure of the three-phase solid-state relay is arranged on the PCB; two groups of control signal connecting terminals, two groups of one-way output controlled load connecting terminals and two groups of two-way output controlled load connecting terminals are arranged on the upper surface of the plastic shell; the direct current input end of the three-phase solid-state relay is connected into the plastic shell through a control signal wiring terminal and is connected to the PCB; a first alternating current output end of the three-phase solid-state relay is led out by one output controlled load wiring terminal; and a second alternating current output end of the three-phase solid-state relay is led out by the two-way output controlled load wiring terminal.
Description
Technical Field
The utility model relates to an electronic switch, in particular to a double-group three-phase solid-state relay.
Background
A Solid State Relay (SSR) is a contactless on-off electronic switch, which is a four-terminal active device. Two ends are used as input control ends, and the other two ends are output controlled ends. The middle part adopts photoelectric isolation, and a direct current or pulse signal is added to the input control end, so that the output controlled end can be converted into a conducting state (a blocking state is formed when no signal is input) from a turn-off state, and a large load is controlled.
The solid-state relay adopts semiconductor devices, has no movable parts and contacts, can realize the same functions as the traditional mechanical electromagnetic relay, and effectively avoids the defects of contact sparks, contact fusion and the like of the traditional mechanical electromagnetic relay due to the fact that no mechanical movement exists during the switching action; the switching speed reaches millisecond level, which is incomparable with the traditional mechanical electromagnetic relay; in addition, the anti-interference capability of the relay is far superior to that of the traditional mechanical electromagnetic relay.
The SSR is a necessary trend and trend for replacing the traditional mechanical electromagnetic relay, and the SSR belongs to the field of computers.
The existing solid-state relays commonly comprise single-phase solid-state relays and three-phase solid-state relays, and the defects are that the integration level is not high enough.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model discloses a double-group three-phase solid-state relay.
The technical scheme adopted by the utility model is as follows:
a two-set, three-phase, solid-state relay comprising a housing structure and a circuit structure; the shell structure comprises a bottom plate and a plastic shell fixed on the bottom plate; a circuit structure of two three-phase solid-state relays is arranged in the plastic shell; the circuit structure of the three-phase solid-state relay is arranged on the PCB; two groups of control signal connecting terminals, two groups of one-way output controlled load connecting terminals and two groups of two-way output controlled load connecting terminals are arranged on the upper surface of the plastic shell; the direct current input end of the three-phase solid-state relay is connected into the plastic shell through a control signal wiring terminal and is connected to the PCB; a first alternating current output end of the three-phase solid-state relay is led out by one output controlled load wiring terminal; and a second alternating current output end of the three-phase solid-state relay is led out by the two-way output controlled load wiring terminal.
The further technical scheme is as follows: the circuit structures of the two three-phase solid-state relays are the same; the circuit structure of each three-phase solid-state relay comprises three groups of switch circuits which are respectively connected to three phases; each group of the switch circuits comprises a first input end and a second input end which are used as direct current input ends, and a first output end and a second output end which are used as alternating current output ends; the input end of the first switch circuit is connected with the anode of the direct current input end; the second input end of the first switch circuit is connected with the first input end of the second switch circuit, the second input end of the second switch circuit is connected with the first input end of the third switch circuit, and the second input end of the third switch circuit is connected with the negative electrode of the direct current input end; and a phase load corresponding to the phase is connected between the first output end and the second output end.
The further technical scheme is as follows: the switching circuit comprises an optocoupler and a switching element; two input ends of the optocoupler are used as a first input end and a second input end; the switching element is a bidirectional thyristor; a first output end of the optocoupler is connected with a first control end of the bidirectional controllable silicon through a first resistor; a second output end of the optocoupler is connected with a second control end of the bidirectional controllable silicon through a second resistor; the first pole and the second pole of the bidirectional controllable silicon are respectively used as a first output end and a second output end.
The further technical scheme is as follows: the switching circuit further comprises an absorption circuit; two ends of the absorption circuit are respectively connected to the first output end and the second output end; the absorption circuit comprises a third resistor and a capacitor which are connected in series, or the absorption circuit is a nonlinear resistor.
The further technical scheme is as follows: the switching circuit includes a switching element; the switching element is a bidirectional thyristor; the two three-phase solid-state relays comprise six bidirectional thyristors; six bidirectional thyristors are sintered on the metal bottom plate; the metal bottom plate is arranged in the plastic frame; installing a PCB above the plastic frame; and the leads of the six bidirectional thyristors are all penetrated out from the holes of the PCB and welded.
The further technical scheme is as follows: first poles and second poles of three bidirectional thyristors of the first three-phase solid-state relay are welded on the PCB and then are respectively connected with a first output controlled load wiring terminal and a first output controlled load wiring terminal; and the first poles and the second poles of three bidirectional thyristors of the second three-phase solid-state relay are welded on the PCB and then are respectively connected with one output controlled load wiring terminal II and two output controlled load wiring terminals II.
The further technical scheme is as follows: the circuit structure of the three-phase solid-state relay also comprises an indicator light; the lamp bead of the indicator lamp is arranged on the plastic shell and beside the control signal wiring terminal corresponding to the indicator lamp; two ends of a lead of the indicator light are respectively connected with the anode of the direct current input end and the cathode of the direct current input end.
The further technical scheme is as follows: the first indicator light and the second indicator light are different in color.
The further technical scheme is as follows: a transparent cover is covered above the plastic shell.
The further technical scheme is as follows: the first output controlled load wiring terminal and the first output controlled load wiring terminal are arranged along the first edge direction of the upper surface of the plastic shell; the second output controlled load wiring terminal and the second output controlled load wiring terminal are arranged along a second edge direction of the upper surface of the plastic shell, which is opposite to the first edge; the control signal wiring terminal is arranged between the first output controlled load wiring terminal and the second output controlled load wiring terminal.
The utility model has the following beneficial effects:
the utility model realizes the effect of the double-group three-phase solid-state relay in one packaging structure by redesigning the shell structure and the circuit structure of the solid-state relay comprehensively, and in one packaging structure, the double-group three-phase solid-state relay does not interfere and influence each other, the wiring is convenient, the mutual winding is avoided during the wiring, the arrangement is neat, a user can conveniently judge which group of the double-group three-phase solid-state relay is in a working state in the using process, and any one three-phase solid-state relay can be selected to be used according to the requirement. The utility model has higher integration level, integrates two three-phase solid-state relays in a small volume, is more suitable for the application scene of modern small-volume electric appliances and small-volume equipment, and has strong practicability.
Drawings
Fig. 1 is an external structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a three-phase solid-state relay according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The double-group three-phase solid-state relay comprises a shell structure and a circuit structure.
Fig. 1 is an external structural diagram of an embodiment of the present invention. As shown in fig. 1, the housing structure of the two-set three-phase solid-state relay includes a bottom plate 1 and a plastic housing 2 fixed on the bottom plate 1. A circuit structure of two three-phase solid-state relays is arranged in the plastic shell 2. The circuit structure of the three-phase solid-state relay is arranged on the PCB. Two groups of control signal wiring terminals 3, two groups of one-way output controlled load wiring terminals 6 and 7 and two groups of two-way output controlled load wiring terminals 8 and 9 are arranged on the upper surface of the plastic shell 2. The direct current input end of the three-phase solid-state relay is connected into the plastic shell 2 through the control signal wiring terminal 3 and is connected to the PCB. A first alternating current output end of the three-phase solid-state relay is led out from a PCB through output controlled load wiring terminals 6 and 7. And a second alternating current output end of the three-phase solid-state relay is led out from the PCB by two output controlled load wiring terminals 8 and 9.
Specifically, the one-way output controlled load connection terminal 6 and the two-way output controlled load connection terminal 8 are arranged along the first edge of the upper surface of the plastic case 2. The second output controlled load wiring terminal 7 and the second output controlled load wiring terminal 9 are arranged along a second edge direction opposite to the first edge of the upper surface of the plastic shell 2. The control signal connecting terminal 3 is arranged between one output controlled load connecting terminal 6 and one output controlled load connecting terminal 7.
Preferably, the first phase 61, the second phase 62 and the third phase 63 of one output controlled load connection terminal 6 are all fixed by fastening bolts, and the connection positions of the first phase 61, the second phase 62 and the third phase 63 are separated by mutually parallel clapboards, so that mutual interference is not easy to occur in the connection, the clapboards are arranged perpendicular to the first edge, the clapboards are arranged at adjacent positions among the first phase 61, the second phase 62 and the third phase 63 and are also arranged at the outermost sides of the first phase 61 and the third phase 63, and the trend of the flat cables is favorably summarized, so that the flat cables are tidy. The arrangement method among the three phases of the two-path output controlled load wiring terminal I8, the one-path output controlled load wiring terminal II 7 and the two-path output controlled load wiring terminal II 9 refers to the one-path output controlled load wiring terminal I6.
The positive pole U + of the direct current input end is connected with the positive pole 3-1 of one input control signal wiring terminal, the negative pole U-of the direct current input end is connected with the negative pole 3-2 of one input control signal wiring terminal, the first output ends A1, B1 and C1 are respectively connected with the first phase 61, the second phase 62 and the third phase 63 of one output controlled load wiring terminal 6, and the second output ends A2, B2 and C2 are respectively connected with the first phase 8-1, the second phase 8-2 and the third phase 8-3 of two output controlled load wiring terminals 8. For another three-phase solid-state relay, inside the housing 2, it can be understood that the connection method of the two direct current input ends of the circuit thereof and the two input control signal wiring terminal anodes 3-3 and the two input control signal wiring terminal cathodes 3-4, and the connection method of the two sets of three-phase alternating current output ends of the circuit thereof and the first phase 7-1, the second phase 7-2 and the third phase 7-3 of the two output controlled load wiring terminal first 7, and the connection method of the first phase 9-1, the second phase 9-2 and the third phase 9-3 of the two output controlled load wiring terminal second 9 are similar.
The circuit structure of the two three-phase solid-state relays is the same. Fig. 2 is a schematic circuit diagram of a three-phase solid-state relay according to an embodiment of the present invention. As shown in fig. 2, for a three-phase solid-state relay, the circuit configuration includes three sets of switching circuits connected to three phases, respectively. Each group of switch circuits comprises a first input end and a second input end which are direct current input ends, a first output end A1, B1 and C1 which are three-phase alternating current output ends, and a second output end A2, B2 and C2. The first input end of the first switching circuit is connected to the positive pole U + of the dc input end through a fourth resistor R1. The second input end of the first switch circuit is connected with the first input end of the second switch circuit, the second input end of the second switch circuit is connected with the first input end of the third switch circuit, and the second input end of the third switch circuit is connected with the negative pole U-of the direct current input end. Phase loads corresponding to the phases are connected between the first output ends A1, B1 and C1 and the second output ends A2, B2 and C2.
As shown in fig. 1 and fig. 2, for a three-phase solid-state relay, in the housing 2, the positive pole U + of the dc input terminal is connected to the positive pole 3-1 of one input control signal connection terminal, the negative pole U-of the dc input terminal is connected to the negative pole 3-2 of one input control signal connection terminal, the first output terminals a1, B1, and C1 are respectively connected to the first phase 61, the second phase 62, and the third phase 63 of one output controlled load connection terminal 6, and the second output terminals a2, B2, and C2 are respectively connected to the first phase 8-1, the second phase 8-2, and the third phase 8-3 of two output controlled load connection terminals 1, 8-3. For another three-phase solid-state relay, inside the housing 2, it can be understood that the connection method of the two direct current input ends of the circuit thereof and the two input control signal wiring terminal anodes 3-3 and the two input control signal wiring terminal cathodes 3-4, and the connection method of the two sets of three-phase alternating current output ends of the circuit thereof and the first phase 7-1, the second phase 7-2 and the third phase 7-3 of the two output controlled load wiring terminal first 7, and the connection method of the first phase 9-1, the second phase 9-2 and the third phase 9-3 of the two output controlled load wiring terminal second 9 are similar.
Specifically, as shown in fig. 2, the switch circuit includes optocouplers U1, U2, U3, and a switching element. Two input ends of the optical couplers U1, U2 and U3 are used as a first input end and a second input end. The switching element is a triac. The bidirectional thyristor is realized by reversely connecting two unidirectional thyristors Q1, Q2, Q3, Q4, Q5 and Q6 in parallel. A first output end of each of the optocouplers U1, U2 and U3 is connected with a first control end of the bidirectional thyristor through a first resistor R3, a first resistor R6 and a first resistor R9. And second output ends of the optocouplers U1, U2 and U3 are connected with a second control end of the bidirectional thyristor through second resistors R7, R7 and R10. The first pole and the second pole of the bidirectional controllable silicon are respectively used as output ends A1, B1 and C1 and output ends A2, B2 and C2.
Further, the switch circuit further comprises an absorption circuit. Two ends of the absorption circuit are respectively connected with the first output ends A1, B1 and C1 and the second output ends A2, B2 and C2. The absorption circuit comprises third resistors R5, R9 and R11 and capacitors C1, C2 and C3 which are connected in series, or the absorption circuit can also adopt nonlinear resistors such as piezoresistors.
In the switch circuit of each phase, the optical couplers U1, U2 and U3 provide a channel between input/output ends for the control signal input at the front end, but electrically disconnect the electrical connection between the input end and the output end in the three-phase solid-state relay to prevent the output end from influencing the input end, the optical couplers are sensitive in action, high in response speed and high in insulation (voltage resistance) grade between the input/output ends, and because the load of the input end is taken as an indicator lamp by a light-emitting diode, the input end of the three-phase solid-state relay is easy to match with the level of the input signal, and can be directly connected with the output interface of a computer in use, namely, is controlled by the logic levels of '1' and '0'.
The absorption circuit is designed to prevent the surge and interference (even malfunction) of the switching device, i.e. the triac, from the spike and surge (voltage) transmitted from the dc power supply
Preferably, the circuit structure of the three-phase solid-state relay further comprises indicator lights 4, 5. The lamp beads of the indicating lamps 4 and 5 are arranged on the plastic shell 2. After the indicator lights 4, 5 are connected in series with the fifth resistor R2, the two ends of the lead of the series circuit are connected to the positive pole U + of the dc input and the negative pole U-of the dc input, respectively.
Preferably, the first indicator light 4 and the second indicator light 5 are different in color, for example, one may be red and one may be green. The indicator lights 4, 5 may be used to indicate which of the two three-phase solid state relays is in operation.
As can be seen from the above, the switching circuit includes a switching element. The switching element is a triac. The two three-phase solid-state relays include six bidirectional thyristors. Six bidirectional thyristors are sintered on the metal base plate. The metal bottom plate is arranged in the plastic frame. And a PCB is arranged above the plastic frame. Each bidirectional controllable silicon comprises a first pole, a second pole, a first controllable end and a second controllable end, wherein the first pole, the second pole, the first controllable end and the second controllable end are connected with leads, and all the leads of the six bidirectional controllable silicon are penetrated out through holes of the PCB and welded.
First poles and second poles of three bidirectional thyristors of the first three-phase solid-state relay are welded on the PCB and then are respectively connected with a first output controlled load wiring terminal 6 and a first output controlled load wiring terminal 8. And the first poles and the second poles of three bidirectional thyristors of the second three-phase solid-state relay are welded on the PCB and then are respectively connected with one output controlled load wiring terminal II 7 and two output controlled load wiring terminal II 9.
After the circuit structure is manufactured, the PCB is completely buried by using epoxy resin for encapsulation, the components of the PCB are protected, and only two groups of control signal wiring terminals 3, two groups of one-way output controlled load wiring terminals 6 and 7, two groups of two-way output controlled load wiring terminals 8 and 9 and input signal indicator lamps 4 and 5 are exposed on the surface of the PCB. A transparent cover is covered above the plastic shell 2. The safety performance is high, can observe the instruction of signal indication lamp 4, 5 simultaneously, and convenience of customers judges operating condition.
In the working process of the utility model, only a certain control signal is required to be added to the control signal wiring terminal 3, namely a direct current power supply, for example, the anode 3-1 of one input control signal wiring terminal is connected with the anode of the direct current power supply, the cathode 3-2 of one input control signal wiring terminal is connected with the cathode of the direct current power supply, the on-off state of three phases between one output controlled load wiring terminal I6 and two output controlled load wiring terminals I8 can be controlled simultaneously, and the switching function is realized. When the positive electrode 3-1 of one input control signal wiring terminal and the negative electrode 3-2 of one input control signal wiring terminal are connected or disconnected with direct current signals, the three bidirectional thyristors are simultaneously switched on or off, so that the effect that one input control signal simultaneously controls the connection or the disconnection of the three alternating current output ends (load ends) is achieved.
Similarly, a direct current power supply is connected or disconnected between the anode 3-3 of the two-path input control signal wiring terminal and the cathode 3-4 of the two-path input control signal wiring terminal, so that the on-off state of the other three-phase solid-state relay can be controlled. The working principle is consistent.
The foregoing description is illustrative of the present invention and is not to be construed as limiting the utility model, which is defined by the scope of the appended claims, as the utility model may be modified in any manner without departing from the essential structure thereof.
Claims (10)
1. A kind of double-group three-phase solid state relay, characterized in that: the relay comprises a housing structure and a circuit structure; the shell structure comprises a bottom plate and a plastic shell fixed on the bottom plate; a circuit structure of two three-phase solid-state relays is arranged in the plastic shell; the circuit structure of the three-phase solid-state relay is arranged on the PCB; two groups of control signal connecting terminals, two groups of one-way output controlled load connecting terminals and two groups of two-way output controlled load connecting terminals are arranged on the upper surface of the plastic shell; the direct current input end of the three-phase solid-state relay is connected into the plastic shell through a control signal wiring terminal and is connected to the PCB; a first alternating current output end of the three-phase solid-state relay is led out by one output controlled load wiring terminal; and a second alternating current output end of the three-phase solid-state relay is led out by the two-way output controlled load wiring terminal.
2. A two-set, three-phase solid-state relay according to claim 1, wherein: the circuit structures of the two three-phase solid-state relays are the same; the circuit structure of each three-phase solid-state relay comprises three groups of switch circuits which are respectively connected to three phases; each group of the switch circuits comprises a first input end and a second input end which are used as direct current input ends, and a first output end and a second output end which are used as alternating current output ends; the input end of the first switch circuit is connected with the anode of the direct current input end; the second input end of the first switch circuit is connected with the first input end of the second switch circuit, the second input end of the second switch circuit is connected with the first input end of the third switch circuit, and the second input end of the third switch circuit is connected with the negative electrode of the direct current input end; and a phase load corresponding to the phase is connected between the first output end and the second output end.
3. A two-set, three-phase solid-state relay according to claim 2, wherein: the switching circuit comprises an optocoupler and a switching element; two input ends of the optocoupler are used as a first input end and a second input end; the switching element is a bidirectional thyristor; a first output end of the optocoupler is connected with a first control end of the bidirectional controllable silicon through a first resistor; a second output end of the optocoupler is connected with a second control end of the bidirectional controllable silicon through a second resistor; the first pole and the second pole of the bidirectional controllable silicon are respectively used as a first output end and a second output end.
4. A two-set, three-phase solid-state relay according to claim 2, wherein: the switching circuit further comprises an absorption circuit; two ends of the absorption circuit are respectively connected to the first output end and the second output end; the absorption circuit comprises a third resistor and a capacitor which are connected in series, or the absorption circuit is a nonlinear resistor.
5. A two-set, three-phase solid-state relay according to claim 2, wherein: the switching circuit includes a switching element; the switching element is a bidirectional thyristor; the two three-phase solid-state relays comprise six bidirectional thyristors; six bidirectional thyristors are sintered on the metal bottom plate; the metal bottom plate is arranged in the plastic frame; installing a PCB above the plastic frame; and the leads of the six bidirectional thyristors are all penetrated out from the holes of the PCB and welded.
6. A two-set, three-phase solid-state relay according to claim 5, wherein: first poles and second poles of three bidirectional thyristors of the first three-phase solid-state relay are welded on the PCB and then are respectively connected with a first output controlled load wiring terminal and a first output controlled load wiring terminal; and the first poles and the second poles of three bidirectional thyristors of the second three-phase solid-state relay are welded on the PCB and then are respectively connected with one output controlled load wiring terminal II and two output controlled load wiring terminals II.
7. A two-set, three-phase solid-state relay according to claim 2, wherein: the circuit structure of the three-phase solid-state relay also comprises an indicator light; the lamp bead of the indicator lamp is arranged on the plastic shell and beside the control signal wiring terminal corresponding to the indicator lamp; two ends of a lead of the indicator light are respectively connected with the anode of the direct current input end and the cathode of the direct current input end.
8. A two-set, three-phase solid-state relay according to claim 7, wherein: the first indicator light and the second indicator light are different in color.
9. A two-set, three-phase solid-state relay according to claim 1, wherein: a transparent cover is covered above the plastic shell.
10. A two-set, three-phase solid-state relay according to claim 1, wherein: the first output controlled load wiring terminal and the first output controlled load wiring terminal are arranged along the first edge direction of the upper surface of the plastic shell; the second output controlled load wiring terminal and the second output controlled load wiring terminal are arranged along a second edge direction of the upper surface of the plastic shell, which is opposite to the first edge; the control signal wiring terminal is arranged between the first output controlled load wiring terminal and the second output controlled load wiring terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121918637.0U CN215644306U (en) | 2021-08-16 | 2021-08-16 | Double-group three-phase solid relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121918637.0U CN215644306U (en) | 2021-08-16 | 2021-08-16 | Double-group three-phase solid relay |
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| Publication Number | Publication Date |
|---|---|
| CN215644306U true CN215644306U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121918637.0U Active CN215644306U (en) | 2021-08-16 | 2021-08-16 | Double-group three-phase solid relay |
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| CN (1) | CN215644306U (en) |
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- 2021-08-16 CN CN202121918637.0U patent/CN215644306U/en active Active
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