CN220752299U - Contactor main contact adhesion detection device - Google Patents
Contactor main contact adhesion detection device Download PDFInfo
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- CN220752299U CN220752299U CN202420430292.1U CN202420430292U CN220752299U CN 220752299 U CN220752299 U CN 220752299U CN 202420430292 U CN202420430292 U CN 202420430292U CN 220752299 U CN220752299 U CN 220752299U
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- 239000003990 capacitor Substances 0.000 claims description 33
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- 238000010586 diagram Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a main contact adhesion detection device of a contactor, which belongs to the technical field of contactors and comprises an MCU, a first power supply loop and a second power supply loop; the first power supply loop comprises a contactor KM1, a relay K1, a bonding state detection circuit NL1, a live detection circuit DD1, a contactor driving circuit QD1 and a fuse F1; the second power supply loop comprises a contactor KM2, a relay K2, a bonding state detection circuit NL2, a live detection circuit DD2, a contactor driving circuit QD2 and a fuse F2; the contactor KM1 is connected with the relay K1 and the relay K2; the contactor KM2 is connected with the relay K2 and the relay K1; the contactor driving circuit QD1 is connected with the contactor KM1 and the MCU; the contactor driving circuit QD2 is connected with the contactor KM2 and the MCU; the adhesion state detection circuit NL1 is connected with the contactor KM1 and the relay K1; the adhesion state detection circuit NL2 is connected to the contactor KM2 and the relay K2. The utility model has the advantages that: the power supply safety is greatly improved.
Description
Technical Field
The utility model relates to the technical field of contactors, in particular to a main contact adhesion detection device of a contactor.
Background
At present, the communication power supply all adopts a double-circuit power supply loop which is backed up each other to provide power for a load, and when the contactor contacts pass through large current exceeding the breaking capacity of the contactor contacts, or an intermediate relay in the power supply loop is insufficient to bear the dissipation power when the contactor coils are attracted, the problems of shaking, instant overload or reduced pressure of a contactor spring and the like of the contactor contacts can be caused, so that the adhesion condition of the main contacts of the contactor is caused. When the main contact of the contactor is stuck, the risk of tripping or firing of the equipment can occur at the moment of switching the power supply circuit, and the consequences are very serious.
Therefore, how to provide a device for detecting adhesion of main contacts of a contactor to achieve improvement of power supply safety becomes a technical problem to be solved urgently.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a main contact adhesion detection device for a contactor, which can improve the power supply safety.
The utility model is realized in the following way: a contactor main contact adhesion detection device comprises an MCU, a first power supply loop and a second power supply loop;
the first power supply loop comprises a contactor KM1, a relay K1, a bonding state detection circuit NL1, a charge detection circuit DD1, a contactor driving circuit QD1 and a fuse F1; the second power supply loop comprises a contactor KM2, a relay K2, a bonding state detection circuit NL2, a charge detection circuit DD2, a contactor driving circuit QD2 and a fuse F2;
the contactor KM1 is connected with a relay K1 and a relay K2; the contactor KM2 is connected with the relay K2 and the relay K1;
one end of the contactor driving circuit QD1 is connected with the contactor KM1, and the other end of the contactor driving circuit QD is connected with the MCU; one end of the contactor driving circuit QD2 is connected with the contactor KM2, and the other end of the contactor driving circuit QD is connected with the MCU; the adhesion state detection circuit NL1 is connected with the contactor KM1 and the relay K1 respectively; the adhesion state detection circuit NL2 is connected with the contactor KM2 and the relay K2 respectively; the live detection circuit DD1 is connected with the contactor KM1 and the relay K1 respectively; the live detection circuit DD2 is respectively connected with the contactor KM2 and the relay K2; the fuse F1 is connected with the relay K1; the fuse F2 is connected to the relay K2.
Further, the adhesion state detection circuit NL1 and the adhesion state detection circuit NL2 each include a power chip UM3, a capacitor C56, a capacitor C58, a capacitor C64, a capacitor C67, a resistor R86, a resistor R95, a fuse F3, a clamp diode D12, a clamp diode D13, an optocoupler OC4, and a contact J18;
pin 2 of the power chip UM3 is connected with capacitor C64 and capacitor C67, and pin 4 is connected with capacitor C56, capacitor C58 and fuse F3;
the pin 1 of the optical coupler OC4 is connected with the resistor R86 and the clamping diode D13, and the pin 4 is connected with the resistor R95 and the MCU;
pin 1 of the contact J18 is connected with a fuse F3, and pin 2 is connected with a clamping diode D12 and a resistor R86; the contact J18 is also connected to an auxiliary contact of the contactor KM1 or KM 2.
Further, the live detection circuit DD1 and the live detection circuit DD2 each include an optocoupler OC3, a resistor R77 and a resistor R84;
the pin 1 of the optical coupler OC3 is connected with the resistor R77, and the pin 4 is connected with the resistor R84 and the MCU; the resistor R77 is connected to the contactor KM1 and the relay K1, or to the contactor KM2 and the relay K2.
Further, the contactor driving circuit QD1 and the contactor driving circuit QD2 each include a relay K3, a diode D5, a transistor Q6, a transistor Q7, a capacitor C51, a resistor R50, a resistor R51, a resistor R54, a resistor R55, a contact J10, and a self-recovery fuse RT1;
one end of the resistor R54 is connected with the MCU, and the other end of the resistor R54 is connected with the resistor R55, the capacitor C51 and the b pole of the triode Q7; the C pole of the triode Q7 is connected with a resistor R51, and the e pole is connected with a pin 7 of a relay K3, the input end of a diode D5, a capacitor C51 and a resistor R55; the e pole of the triode Q6 is connected with a resistor R50, the b pole is connected with the resistor R50 and a resistor R51, and the c pole is connected with a pin 8 of a relay K3 and the output end of a diode D5;
pin 1 of the contact J10 is connected with a relay K3, and pin 3 is connected with a self-recovery fuse RT1; the contact J10 is also connected to the contactor KM1 or KM 2.
The utility model has the advantages that:
by arranging the first power supply loop and the second power supply loop, the contactor KM1 of the first power supply loop is connected with the relay K1 and the relay K2 of the second power supply loop, the contactor KM2 of the second power supply loop is connected with the relay K2 and the relay K1 of the first power supply loop, namely, the contactor KM1, the relay K1, the contactor KM2 and the relay K2 form an interlocking relationship, the power supply loop of the relay K1 is controlled by a normally open contact of the contactor KM2, and the power supply loop of the relay K2 is controlled by a normally open contact of the contactor KM1; and the first power supply loop and the second power supply loop are respectively provided with an adhesion state detection circuit NL1 and an adhesion state detection circuit NL2 which are connected with the MCU, when the MCU detects that the main contact of the contactor KM1 or the contactor KM2 is adhered through the adhesion state detection circuit NL1 or the adhesion state detection circuit NL2, the contactor KM2 or the contactor KM1 cannot be electrified, the power supply loop is prevented from being switched when the main contact of the contactor is adhered, and the power supply safety is greatly improved.
Drawings
The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of a contact primary contact adhesion detection device of the present utility model.
Fig. 2 is a circuit diagram of a contact main contact adhesion detection device according to the present utility model.
Fig. 3 is a circuit diagram of the adhesion state detection circuit of the present utility model.
Fig. 4 is a circuit diagram of the present utility model charge detection circuit.
Fig. 5 is a circuit diagram of the contactor driving circuit of the present utility model.
Detailed Description
According to the embodiment of the utility model, by providing the device for detecting the adhesion of the main contact of the contactor, the technical problem that equipment tripping or ignition occurs at the moment of switching the power supply loop after the adhesion of the main contact of the contactor occurs in the prior art is solved, and the technical effect of greatly improving the power supply safety is realized.
The technical scheme in the embodiment of the utility model aims to solve the problems, and the overall thought is as follows: the contactor KM1, the relay K1, the contactor KM2 and the relay K2 are arranged to form an interlocking relationship, when the MCU detects that the main contact of the contactor KM1 or the contactor KM2 is adhered through the adhesion state detection circuit NL1 or the adhesion state detection circuit NL2, the contactor KM2 or the contactor KM1 cannot be electrified, and the power supply loop is prevented from being switched when the main contact of the contactor is adhered, so that the power supply safety is improved.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 5, a preferred embodiment of a device for detecting adhesion of a main contact of a contactor according to the present utility model includes an MCU, a first power supply loop, and a second power supply loop;
the MCU is used for controlling the operation of the adhesion detection device, and in the specific implementation, the MCU capable of realizing the function is selected from the prior art, and is not limited to any model, for example, STM32F103 series MCU of ST company, and the control program is well known to the person skilled in the art, and can be obtained by the person skilled in the art without the need of creative labor; the first power supply loop and the second power supply loop are power supply loops which are mutually backed up and are used for supplying power to a load;
the first power supply loop comprises a contactor KM1, a relay K1, a bonding state detection circuit NL1, a charge detection circuit DD1, a contactor driving circuit QD1 and a fuse F1; the second power supply loop comprises a contactor KM2, a relay K2, a bonding state detection circuit NL2, a charge detection circuit DD2, a contactor driving circuit QD2 and a fuse F2;
the adhesion state detection circuit NL1 is used for detecting the channel states of the contactor KM1 and the relay K1; the adhesion state detection circuit NL2 is used for detecting the channel states of the contactor KM2 and the relay K2; the electrification detection circuit DD1 is used for detecting whether the contactor KM1 and the relay K1 are electrified or not; the electrification detection circuit DD2 is used for detecting whether the contactor KM2 and the relay K2 are electrified or not; the contactor driving circuit QD1 is used for driving the contactor KM1; the contactor driving circuit QD2 is used for driving the contactor KM2;
the contactor KM1 is connected with a relay K1 and a relay K2; the contactor KM2 is connected with the relay K2 and the relay K1;
one end of the contactor driving circuit QD1 is connected with the contactor KM1, and the other end of the contactor driving circuit QD is connected with the MCU; one end of the contactor driving circuit QD2 is connected with the contactor KM2, and the other end of the contactor driving circuit QD is connected with the MCU; the adhesion state detection circuit NL1 is connected with the contactor KM1 and the relay K1 respectively; the adhesion state detection circuit NL2 is connected with the contactor KM2 and the relay K2 respectively; the live detection circuit DD1 is connected with the contactor KM1 and the relay K1 respectively; the live detection circuit DD2 is respectively connected with the contactor KM2 and the relay K2; the fuse F1 is connected with the relay K1; the fuse F2 is connected to the relay K2.
The adhesion state detection circuit NL1 and the adhesion state detection circuit NL2 each include a power chip UM3, a capacitor C56, a capacitor C58, a capacitor C64, a capacitor C67, a resistor R86, a resistor R95, a fuse F3, a clamp diode D12, a clamp diode D13, an optocoupler OC4, and a contact J18;
pin 2 of the power chip UM3 is connected with capacitor C64 and capacitor C67, and pin 4 is connected with capacitor C56, capacitor C58 and fuse F3;
the pin 1 (input end positive electrode) of the optical coupler OC4 is connected with the resistor R86 and the clamping diode D13, and the pin 4 (collector electrode) is connected with the resistor R95 and the MCU;
pin 1 of the contact J18 is connected with a fuse F3, and pin 2 is connected with a clamping diode D12 and a resistor R86; the contact J18 is also connected to an auxiliary contact of the contactor KM1 or KM 2. Because the main contact and the auxiliary contact are in mechanical linkage, the main contact state is the auxiliary contact state, and the contact state is converted into an electric signal to be sent to the MCU through the isolation of the optocoupler OC 4.
The live detection circuit DD1 and the live detection circuit DD2 each comprise an optocoupler OC3, a resistor R77 and a resistor R84;
the pin 1 (positive electrode of the input end) of the optical coupler OC3 is connected with the resistor R77, and the pin 4 (collector) is connected with the resistor R84 and the MCU; the resistor R77 is connected to the contactor KM1 and the relay K1, or to the contactor KM2 and the relay K2. Namely, through the isolation of the optocoupler OC3, the electrified state of the contact is converted into an electric signal to be sent to the MCU.
The contactor driving circuit QD1 and the contactor driving circuit QD2 each comprise a relay K3, a diode D5, a transistor Q6, a transistor Q7, a capacitor C51, a resistor R50, a resistor R51, a resistor R54, a resistor R55, a contact J10 and a self-recovery fuse RT1;
one end of the resistor R54 is connected with the MCU, and the other end of the resistor R54 is connected with the resistor R55, the capacitor C51 and the b pole of the triode Q7; the C pole of the triode Q7 is connected with a resistor R51, and the e pole is connected with a pin 7 of a relay K3, the input end of a diode D5, a capacitor C51 and a resistor R55; the e pole of the triode Q6 is connected with a resistor R50, the b pole is connected with the resistor R50 and a resistor R51, and the c pole is connected with a pin 8 of a relay K3 and the output end of a diode D5;
pin 1 of the contact J10 is connected with a relay K3, and pin 3 is connected with a self-recovery fuse RT1; the contact J10 is also connected to the contactor KM1 or KM 2.
The high level sent by the MCU drives the triode Q7 and then the triode Q6 to enable the relay K3 to work, and the normally open contact point of the relay K3 sends large current to the coil of the contactor through the contact J10 to drive the contactor.
The working principle of the utility model is as follows:
when the MCU detects that the relay K1 and the relay K2 are electrified and are in a normally open state, and the normally closed auxiliary contacts of the contactor KM1 and the contactor KM2 are normal, the MCU starts the contactor KM1, the normally closed auxiliary contact of the contactor KM1 is detected to be in an off state, the fact that the main contact and the auxiliary normally open contact of the contactor KM1 are normally attracted is indicated, a power supply loop of the relay K2 is conducted, and a power supply of the contactor KM2 is forcibly disconnected.
When the power supply of the second power supply loop is to be switched, if the MCU detects that the main contact of the contactor KM1 is adhered through the adhesion state detection circuit NL1, the contactor KM2 is controlled to be incapable of being electrified.
In summary, the utility model has the advantages that:
by arranging the first power supply loop and the second power supply loop, the contactor KM1 of the first power supply loop is connected with the relay K1 and the relay K2 of the second power supply loop, the contactor KM2 of the second power supply loop is connected with the relay K2 and the relay K1 of the first power supply loop, namely, the contactor KM1, the relay K1, the contactor KM2 and the relay K2 form an interlocking relationship, the power supply loop of the relay K1 is controlled by a normally open contact of the contactor KM2, and the power supply loop of the relay K2 is controlled by a normally open contact of the contactor KM1; and the first power supply loop and the second power supply loop are respectively provided with an adhesion state detection circuit NL1 and an adhesion state detection circuit NL2 which are connected with the MCU, when the MCU detects that the main contact of the contactor KM1 or the contactor KM2 is adhered through the adhesion state detection circuit NL1 or the adhesion state detection circuit NL2, the contactor KM2 or the contactor KM1 cannot be electrified, the power supply loop is prevented from being switched when the main contact of the contactor is adhered, and the power supply safety is greatly improved.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.
Claims (3)
1. The utility model provides a contactor main contact adhesion detection device which characterized in that: comprises an MCU, a first power supply loop and a second power supply loop;
the first power supply loop comprises a contactor KM1, a relay K1, a bonding state detection circuit NL1, a charge detection circuit DD1, a contactor driving circuit QD1 and a fuse F1; the second power supply loop comprises a contactor KM2, a relay K2, a bonding state detection circuit NL2, a charge detection circuit DD2, a contactor driving circuit QD2 and a fuse F2;
the contactor KM1 is connected with a relay K1 and a relay K2; the contactor KM2 is connected with the relay K2 and the relay K1;
one end of the contactor driving circuit QD1 is connected with the contactor KM1, and the other end of the contactor driving circuit QD is connected with the MCU; one end of the contactor driving circuit QD2 is connected with the contactor KM2, and the other end of the contactor driving circuit QD is connected with the MCU; the adhesion state detection circuit NL1 is connected with the contactor KM1 and the relay K1 respectively; the adhesion state detection circuit NL2 is connected with the contactor KM2 and the relay K2 respectively; the live detection circuit DD1 is connected with the contactor KM1 and the relay K1 respectively; the live detection circuit DD2 is respectively connected with the contactor KM2 and the relay K2; the fuse F1 is connected with the relay K1; the fuse F2 is connected with the relay K2; the adhesion state detection circuit NL1 and the adhesion state detection circuit NL2 each include a power chip UM3, a capacitor C56, a capacitor C58, a capacitor C64, a capacitor C67, a resistor R86, a resistor R95, a fuse F3, a clamp diode D12, a clamp diode D13, an optocoupler OC4, and a contact J18;
pin 2 of the power chip UM3 is connected with capacitor C64 and capacitor C67, and pin 4 is connected with capacitor C56, capacitor C58 and fuse F3;
the pin 1 of the optical coupler OC4 is connected with the resistor R86 and the clamping diode D13, and the pin 4 is connected with the resistor R95 and the MCU;
pin 1 of the contact J18 is connected with a fuse F3, and pin 2 is connected with a clamping diode D12 and a resistor R86; the contact J18 is also connected to an auxiliary contact of the contactor KM1 or KM 2.
2. The contact primary contact adhesion detection device of claim 1, wherein: the live detection circuit DD1 and the live detection circuit DD2 each comprise an optocoupler OC3, a resistor R77 and a resistor R84;
the pin 1 of the optical coupler OC3 is connected with the resistor R77, and the pin 4 is connected with the resistor R84 and the MCU; the resistor R77 is connected to the contactor KM1 and the relay K1, or to the contactor KM2 and the relay K2.
3. The contact primary contact adhesion detection device of claim 1, wherein: the contactor driving circuit QD1 and the contactor driving circuit QD2 each comprise a relay K3, a diode D5, a transistor Q6, a transistor Q7, a capacitor C51, a resistor R50, a resistor R51, a resistor R54, a resistor R55, a contact J10 and a self-recovery fuse RT1;
one end of the resistor R54 is connected with the MCU, and the other end of the resistor R54 is connected with the resistor R55, the capacitor C51 and the b pole of the triode Q7; the C pole of the triode Q7 is connected with a resistor R51, and the e pole is connected with a pin 7 of a relay K3, the input end of a diode D5, a capacitor C51 and a resistor R55; the e pole of the triode Q6 is connected with a resistor R50, the b pole is connected with the resistor R50 and a resistor R51, and the c pole is connected with a pin 8 of a relay K3 and the output end of a diode D5;
pin 1 of the contact J10 is connected with a relay K3, and pin 3 is connected with a self-recovery fuse RT1; the contact J10 is also connected to the contactor KM1 or KM 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420430292.1U CN220752299U (en) | 2024-03-06 | 2024-03-06 | Contactor main contact adhesion detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420430292.1U CN220752299U (en) | 2024-03-06 | 2024-03-06 | Contactor main contact adhesion detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220752299U true CN220752299U (en) | 2024-04-09 |
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ID=90566231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420430292.1U Active CN220752299U (en) | 2024-03-06 | 2024-03-06 | Contactor main contact adhesion detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220752299U (en) |
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- 2024-03-06 CN CN202420430292.1U patent/CN220752299U/en active Active
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