CN217882849U - anti-AC input intermediate relay circuit - Google Patents
anti-AC input intermediate relay circuit Download PDFInfo
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- CN217882849U CN217882849U CN202220965893.3U CN202220965893U CN217882849U CN 217882849 U CN217882849 U CN 217882849U CN 202220965893 U CN202220965893 U CN 202220965893U CN 217882849 U CN217882849 U CN 217882849U
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- 238000001514 detection method Methods 0.000 claims 2
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model provides an anti AC input auxiliary relay circuit, include: a positive terminal of a direct current power supply; a negative terminal of the direct current power supply; a pre-stage switch relay; a controlled relay; the alternating current resisting device is used for controlling the action of the front stage switch relay according to the type of the input power supply; the alternating current resisting device is provided with a switch circuit, one end of the switch circuit is connected to the negative pole end of the direct current power supply, the other end of the switch circuit is connected to the relay coil of the pre-stage switch relay, and the other end of the relay coil of the pre-stage switch relay is connected with the positive pole end of the direct current power supply. The anti-AC device controls the switch circuit to be switched off according to the detected AC input and controls the switch circuit to be switched on according to the detected DC input. The utility model discloses an anti AC input auxiliary relay circuit can not move always when AC input, and delay time is predetermined long back reliable action when DC input to have the advantage that the direct current joins conversely not burns.
Description
Technical Field
The utility model relates to a relay technical field particularly relates to an anti AC input auxiliary relay circuit.
Background
The high-power direct-current intermediate relay used in the high-voltage line of the national grid has higher requirement on interference resistance, can reliably act or not act particularly when alternating current is input or input disturbance exists, and can not act or respond when direct current is reversely connected, so that stable and reliable operation is realized.
SUMMERY OF THE UTILITY MODEL
According to the utility model discloses modified first aspect provides an anti ac input auxiliary relay circuit, include: a positive terminal of the direct current power supply; a negative terminal of the direct current power supply; a pre-stage switch relay; the first relay is used as a controlled relay, and a coil of the first relay is connected between the negative end of the direct-current power supply and an output contact of the preceding stage switch relay;
the alternating current resisting device is connected between the positive end of the direct current power supply and the negative end of the direct current power supply and is used for controlling the action of the front stage switch relay according to the type of the input power supply;
the alternating current resisting device is provided with a switch circuit, one end of the switch circuit is connected to the negative pole end of the direct current power supply, the other end of the switch circuit is connected to the relay coil of the pre-stage switch relay, and the other end of the relay coil of the pre-stage switch relay is connected with the positive pole end of the direct current power supply.
The anti-AC device controls the switch circuit to be switched off according to the detected AC input, and controls the switch circuit to be switched on according to the detected DC input.
In an alternative embodiment, the ac input resisting intermediate relay circuit includes two controlled relays, namely a first relay and a second relay, and coils of the first relay and the second relay are connected in series between the negative terminal of the dc power supply and the output contact of the preceding stage switch relay.
As a preferred embodiment, the ac countermeasure device further includes a control circuit for input delay, and the control circuit is connected to the switch circuit and is configured to control the on/off of the switch circuit.
Preferably, the input delay control circuit includes a first resistor, a first capacitor, and a control IC, the first resistor and the first capacitor are connected in series between the negative terminal of the dc power supply and the power supply terminal VCC, and the first resistor and the first capacitor form a delay time control circuit for controlling the delay time T;
the TRIG port and the THRES port of the control IC are respectively connected between the first resistor and the first capacitor, and the OUT port of the control IC is output to the switch circuit.
Preferably, the switch circuit comprises a second resistor, a first voltage stabilizing diode and an N-type MOS transistor, the OUT port of the control IC is connected to the gate of the N-type MOS transistor, the source of the N-type MOS transistor is connected to the negative terminal of the dc power supply, the second resistor and the first voltage stabilizing diode are further arranged between the gate of the N-type MOS transistor and the negative terminal of the dc power supply in parallel, and the drain of the N-type MOS transistor is output to the relay coil of the pre-stage switch relay.
The utility model provides an anti AC input auxiliary relay circuit, preceding stage switch relay reliably does not move also not respond when AC input, and when DC input, makes preceding stage switch relay reliably move after the predetermined time of delay, and the controlled relay action of control back level realizes the effect of anti DC input interference, does not move and the function that does not burn when having DC input reversal simultaneously.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the inventive subject matter of this disclosure.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an ac input resistant intermediate relay circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an ac countermeasure device according to an exemplary embodiment of the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
The ac input resistant intermediate relay circuit of the embodiment shown in fig. 1 and 2 includes a dc power supply positive terminal 111 and a dc power supply negative terminal 112 as input interfaces for power input.
The ac input resisting intermediate relay circuit shown in fig. 1 further includes a front stage switch relay KM and at least one controlled relay, a coil of the controlled relay is connected between the dc power supply negative terminal 120 and an output contact of the front stage switch relay KM, and the coil is powered on through a contact action of the front stage switch relay KM.
In the embodiment of the present invention, taking two controlled relays, i.e. the first relay KM1 and the second relay KM2 as an example, in a preferred example, the two controlled relays KM1 and KM2 are generally relays with the same model parameters.
The ac input resisting intermediate relay circuit shown in fig. 1 further includes an ac resisting device 120 connected between the dc power source positive terminal 111 and the dc power source negative terminal 112, for controlling the operation of the front stage switch relay KM according to the type of the input power source, i.e., ac or dc.
The ac impedance device 120 has a switch circuit 122, one end of the switch circuit 122 is connected to the negative terminal 112 of the dc power supply, and the other end is connected to the relay coil of the preceding stage switch relay KM, and the other end of the relay coil of the preceding stage switch relay KM is connected to the positive terminal 111 of the dc power supply.
Therefore, the ac countermeasure means 120 detects whether the input is dc or ac, and controls the switching circuit to be turned off when dc input is detected, and controls the switching circuit 122 to be turned on when dc input is detected, so that the relay coil of the front stage switch relay KM is energized and operates reliably.
Preferably, the ac rejection means 120 controls the switch circuit 122 to turn off upon detecting an ac input, and controls the switch circuit 122 to turn on upon detecting a dc input.
As shown in fig. 1, a series voltage-dividing resistor RQ1 is connected to the relay coil of the front-stage switch relay KM at the other end of the switch circuit 122. The voltage dividing resistor RQ1 serves as a voltage dividing resistor of the preceding stage switch relay KM.
As shown in fig. 1, the other end of the switch circuit 122 is connected in series with a starting resistor RP1, connected to the normally closed contact of the preceding stage switch relay KM, and connected to the positive terminal 111 of the dc power supply. Therefore, when the front-stage switch relay KM is in effective action, the starting resistor RP1 (5W) is used as the starting resistor of the controlled relays KM1 and KM2, and the starting power is ensured to be more than or equal to 5W.
With reference to the embodiment of fig. 1, a protection diode D2 is further disposed between the positive terminal 111 of the dc power supply and the relay coil of the pre-stage switch relay KM, the positive terminal of the protection diode D2 is connected to the positive terminal 111 of the dc power supply, and the negative terminal thereof is connected to the relay coil of the pre-stage switch relay KM. Therefore, the protection diode D2 is arranged to directly prevent reverse connection and burning.
As shown in fig. 1 and 2, the ac countermeasure device 120 further includes a control circuit 121 for inputting a delay time, and the control circuit 121 for inputting a delay time is connected to the switch circuit 122 for controlling the on/off of the switch circuit 122.
With reference to the example shown in fig. 2, the control circuit 121 for inputting the delay time includes a first resistor R1, a first capacitor C1, and a control IC 124, where the first resistor R1 and the first capacitor C1 are connected in series between the negative terminal 112 of the dc power supply and a power supply terminal VCC, and the power supply terminal VCC may be determined according to the model of the selected control IC. In the embodiment of the utility model, control IC chooses TLC555 timer for use.
Therefore, with reference to fig. 2, the first resistor R1 and the first capacitor C1 form a delay time control circuit for controlling the delay time T. The embodiment of the utility model provides an in, control delay time through chooseing for use suitable first resistance R1 and first electric capacity C1 about 15ms.
As shown in fig. 2, the TRIG port and the THRES port of the control IC 124 are respectively connected between the first resistor R1 and the first capacitor C1, and the OUT port of the control IC 124 is output to the switch circuit 122.
As shown in fig. 2, the GND port of the control IC 124 is connected to the dc power supply negative terminal 112.
Preferably, the CONT port of the control IC 124 is connected to the negative terminal 112 of the dc power supply via a second capacitor C2.
As shown in fig. 2, preferably, two ends of the first capacitor C1 are further connected in parallel and inversely connected with a first diode D1, a negative electrode end of the first diode D1 is connected with the power supply terminal VCC, and a positive electrode end is connected between the first resistor R1 and the first capacitor C1.
Referring to fig. 2, the switching circuit 122 includes a second resistor R2, a first zener diode VR1, and an N-type MOS transistor Q1. The OUT port of the control IC 124 is connected to the G pole of the N-type MOS transistor Q1, the S pole of the N-type MOS transistor Q1 is connected to the dc power supply negative terminal 112, a second resistor R2 and a first voltage stabilizing diode VR1 are further arranged in parallel between the G pole of the N-type MOS transistor Q1 and the dc power supply negative terminal 112, and the D pole of the N-type MOS transistor Q1 is output to the relay coil of the pre-stage switch relay KM.
Thus, with reference to the example shown in fig. 1 and 2, when dc power is input to the dc power positive terminal 111 and the dc power negative terminal 112, the ac countermeasure device 120 supplies power first to perform delay timing, and after a delay of 15ms, the N-type MOS transistor Q1 of the control switch circuit is turned on, and the preceding stage switch relay KM1 is activated after being activated, and the controlled relays KM1 and KM2 are activated to activate.
When the ac power is input to the dc power positive terminal 111 and the dc power negative terminal 112, when the ac input is + the power supply of the ac impedance device 120 starts to delay the timing, and the ac input becomes-within a certain time (e.g., 10 ms), the ac impedance device 120 stops the timing when the power is cut off, so that the ac impedance device 120 does not time to a preset time duration, e.g., 15ms, so that the switching circuit thereof is not turned on, and the preceding stage switching relay KM is not operated.
Therefore, the input delay alternating current input resistant relay circuit has the advantages that the relay circuit does not act all the time when alternating current is input, and reliably acts after delaying the preset time length when direct current is input, and the relay circuit has the advantages of direct current reverse connection and no burning.
With reference to the examples shown in fig. 1 and 2, the following possible types of components are selected:
the preceding stage switch relay KM1, the first relay KM1 and the second relay KM2 adopt the same model parameters, for example, HF115F series relays, and in a 220VDC relay circuit, for example, 110V (coil voltage level) series relays in HF115F series may be adopted;
first diode D1: a fast recovery diode, particularly a diode with a withstand voltage of more than 100V, in this example, model 4148;
protection diode D2: 1N series diodes with high withstand voltage and reverse recovery time IN ms level are adopted, such as IN4005, 4006 and 4007 series diodes;
the first voltage-stabilizing diode VD1 can adopt IN47 series voltage-stabilizing tubes, and IN the embodiment, 1N4742A/12V voltage-stabilizing tubes are selected;
voltage-dividing resistor RQ1: the resistance value is between 26K and 32K ohms, and 28K ohms is adopted in the embodiment of the utility model;
starting resistor QP1: the resistance value is 22K-28K ohm, the utility model selects 28K ohm;
first capacitance C1:1-1.2uF;
second capacitance C2:10-20nF;
n type MOS pipe Q1: MOS tubes with voltage of 600-800V/current of 0.4-1A, such as KIA1N60H type MOS tubes;
first resistance R1:10K-50K ohm, and can be designed by combining the first capacitor according to the design requirement of the time delay duration;
second resistance R2:12K ohms.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. An anti-ac input intermediate relay circuit, comprising:
a positive terminal (111) of a direct current power supply;
a DC power supply negative terminal (112);
a preceding stage switch relay (KM);
at least one controlled first relay (KM 1), wherein a coil of the first relay (KM 1) is connected between a direct-current power supply negative end (112) and an output contact of a preceding stage switch relay (KM);
the alternating current resisting device (120) is connected between the positive end (111) of the direct current power supply and the negative end (112) of the direct current power supply and is used for controlling the action of the front stage switch relay (KM) according to the type of the input power supply;
the alternating current resisting device (120) is provided with a switch circuit (122), one end of the switch circuit (122) is connected to the negative pole end (112) of the direct current power supply, the other end of the switch circuit is connected to the relay coil of the preceding stage switch relay (KM), and the other end of the relay coil of the preceding stage switch relay (KM) is connected with the positive pole end (111) of the direct current power supply.
2. The ac input resistant intermediate relay circuit according to claim 1, wherein the ac resistant device (120) controls the switching circuit (122) to be turned off according to the detection of the ac input, and controls the switching circuit (122) to be turned on according to the detection of the dc input.
3. An anti-ac-input intermediate relay circuit according to claim 1, characterized in that the other end of the switch circuit (122) is connected with a series divider resistor (RQ 1) connected to the relay coil of the preceding switch relay (KM).
4. An anti-ac-input intermediate relay circuit according to claim 3, characterized in that the other end of the switch circuit (122) is connected in series with a starting resistor (RP 1) connected to the normally closed contact of the preceding switch relay (KM) and to the positive terminal (111) of the dc power supply.
5. An anti-ac input intermediate relay circuit according to claim 1, characterized in that a protection diode (D2) is further disposed between the dc power source positive terminal (111) and the relay coil of the pre-stage switch relay (KM), the positive terminal of the protection diode (D2) is connected to the dc power source positive terminal (111), and the negative terminal thereof is connected to the relay coil of the pre-stage switch relay (KM).
6. An anti-ac-input relay circuit according to any one of claims 1-5, characterized in that said anti-ac device (120) further comprises an input delay control circuit (121), said control circuit (121) being connected to said switching circuit (122) for controlling the turn-off/turn-on of said switching circuit (122).
7. The AC input resistant intermediate relay circuit as claimed in claim 6, wherein the input delay control circuit (121) comprises a first resistor (R1), a first capacitor (C1) and a control IC (124), the first resistor (R1) and the first capacitor (C1) are connected in series between the DC power supply negative terminal (112) and the power supply terminal (VCC), the first resistor (R1) and the first capacitor (C1) form a delay time control circuit for controlling the delay time T; the TRIG port and the THRES port of the control IC (124) are respectively connected between a first resistor (R1) and a first capacitor (C1), and the OUT port of the control IC (124) is output to the switch circuit (122).
8. An ac input relay circuit according to claim 7, wherein said delay time period T is controlled to be 15ms.
9. An anti-ac input relay circuit according to claim 7, wherein the first capacitor (C1) is further connected in parallel with a first diode (D1) at its two ends, the first diode (D1) having its negative terminal connected to the power supply terminal (VCC) and its positive terminal connected between the first resistor (R1) and the first capacitor (C1).
10. The ac input resistant intermediate relay circuit according to claim 7, wherein the switch circuit (122) includes a second resistor (R2), a first voltage regulator diode (VR 1) and an N-type MOS transistor (Q1), the OUT port of the control IC (124) is connected to the G pole of the N-type MOS transistor (Q1), the S pole of the N-type MOS transistor (Q1) is connected to the dc power supply negative terminal (112), and the second resistor (R2) and the first voltage regulator diode (VR 1) are further arranged in parallel between the G pole of the N-type MOS transistor (Q1) and the dc power supply negative terminal (112), and the D pole of the N-type MOS transistor (Q1) is output to the relay coil of the preceding stage switch relay (KM).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220965893.3U CN217882849U (en) | 2022-04-25 | 2022-04-25 | anti-AC input intermediate relay circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220965893.3U CN217882849U (en) | 2022-04-25 | 2022-04-25 | anti-AC input intermediate relay circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217882849U true CN217882849U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220965893.3U Expired - Fee Related CN217882849U (en) | 2022-04-25 | 2022-04-25 | anti-AC input intermediate relay circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217882849U (en) |
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2022
- 2022-04-25 CN CN202220965893.3U patent/CN217882849U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |