Electromagnetic anti-interference electricity contactor in double-winding working mode

Abstract

The invention discloses an electromagnetic anti-interference electricity contactor in a double-winding working mode, and belongs to the technical field of electric contactors. When the anti-interference electricity contactor is in a pull-in state, 220V alternating current is supplied to a pull-in coil, so that the pull-in coil is electrified to generate large magnetic force, after a movable iron core and a static iron core are pulled in, the movable iron core and the static iron core are close to each other, and power is supplied to a holding coil; the holding coil is kept in a pull-in state after being electrified, the pull-in coil is small in working power, and the energy-saving effect is better compared with an existing electric contactor; comprising a voltage acquisition module, a logic processing module and a power supply module, and is used for supplying power to the pull-in coil and the holding coil and electrifying the pull-in coil after the contactor is electrified, so that the contactor is pulled in; after the contactor is attracted, power is supplied to the holding coil, so that the contactor is kept in an attracted state; the power supply module further comprises an energy storage module used for storing electric energy, and when the contactor is kept in the pull-in state and the fluctuation quantity of the power supply voltage exceeds a preset value, the logic processing module controls the energy storage module to supply power to the holding coil.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical contactor devices, and particularly to an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode. Background Art

[0002] In the petrochemical field, when power fluctuations occur during production and manufacturing, it will cause key equipment to shut down, and then cause the equipment device to stop running, resulting in the forced interruption of the production process, which may lead to huge economic losses.

[0003] Therefore, in actual production, anti - power - fluctuation contactors are configured in the power supply circuit. The anti - power - fluctuation contactor can respond when there is an instantaneous interruption or voltage fluctuation in the power supply, and maintain the closed state of the main contacts of the contactor during short - term voltage fluctuations, reducing the impact of voltage fluctuations on the equipment.

[0004] Currently, the anti - power - fluctuation contactor mainly uses a suction coil to attract the moving iron core. The moving iron core drives the main contacts to switch to the closed state. When maintaining the attraction, by continuously supplying power to the suction coil, the suction coil continuously generates magnetism to keep the moving iron core attracted. In the above - mentioned way, when maintaining the attracted state, alternating current is supplied to the suction coil, resulting in relatively high noise and high power consumption of the suction coil. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode.

[0006] To achieve the above purpose, the technical solution of the present invention is: an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode, comprising: A voltage acquisition module for acquiring the supply voltage; A logic processing module for obtaining the acquisition data of the voltage acquisition module and analyzing the acquisition data; A power supply module for supplying power to the suction coil and the holding coil. After the contactor is powered on, the suction coil is powered on to make the contactor attract; and after the contactor attracts, the holding coil is powered on to make the contactor maintain the attracted state; The power supply module further includes an energy storage module for storing electric energy. When the contactor is in the state of maintaining attraction, when the fluctuation amount of the supply voltage exceeds a predetermined value, the logic processing module controls the energy storage module to supply power to the holding coil.

[0007] Further, when the holding coil is powered on to make the contactor maintain the attracted state, the power supply module supplies direct current to the holding coil.

[0008] Further, when the holding coil is powered on to make the contactor maintain the attracted state, the holding coil and the suction coil are connected in series.

[0009] Furthermore, an auxiliary switch is included, the two ends of the auxiliary switch are respectively connected to the two ends of the holding coil, and the auxiliary switch is configured to be linked to switch from a closed state to an open state when the contactor switches from an open state to an attracted state.

[0010] Furthermore, the power supply module includes a power supply circuit, which includes a rectifier circuit and a relay, the normally closed end of the relay is connected to the positive output end of the bridge rectifier circuit, the common end of the relay is connected to the pull-in coil, the other end of the pull-in coil is connected to the holding coil, and the other end of the holding coil is connected to the negative output end of the rectifier circuit.

[0011] Furthermore, the energy storage module includes an energy storage circuit, a first end of the energy storage circuit is respectively connected to the positive output end of the power supply circuit and the normally-open end of the relay, a second end of the energy storage circuit is connected to the negative output end of the power supply circuit, a diode 1 is arranged between the first end and the positive output end, a diode 2 is arranged between the first end and the normally-open end, a cathode of the diode 1 is connected to the first end, and a cathode of the diode 2 is connected to the first end.

[0012] Furthermore, the energy storage module includes at least one capacitor, a positive electrode of the capacitor is connected to the first end, and a negative electrode of the capacitor is connected to the second end.

[0013] Furthermore, when the power supply voltage fluctuation exceeds a predetermined value, the logic processing module controls the relay to switch from a normally closed end to a normally open end.

[0014] Furthermore, the power supply voltage fluctuation exceeding a predetermined value includes: any one phase of the three-phase power supply voltage drops suddenly and is lower than 65%-75% of the rated voltage.

[0015] Furthermore, within a predetermined time period, when the sudden voltage drop recovers to no less than 90% of the rated voltage, the logic processing module controls the relay to switch from the normally open end to the normally closed end.

[0016] Compared with the prior art, the electromagnetic anti-sway contactor with a dual-winding working mode disclosed in the present invention has the following beneficial effects: when the anti-sway contactor is in the attracted state, 220V AC is supplied to the attracting coil so that the attracting coil is energized to generate a large magnetic force, thereby ensuring that the electric contactor has sufficient force to pull the moving iron core to attract. After the moving iron core and the static iron core are attracted, the distance between the two is relatively close, and a smaller magnetic force is required to maintain the attracted state. At this time, the logic control module controls the power supply circuit to reduce the power supply voltage and supply power to the holding coil. After the holding coil is energized, a smaller magnetic force is generated to maintain the attracted state. The working power of the attracting coil is small, and the energy-saving effect is better than that of the existing electric contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is the control logic diagram of an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0018] Figure 2 This is the circuit diagram of the suction coil, holding coil and energy - storage module of an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0019] Figure 3 This is the circuit diagram of an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0020] Figure 4 This is the structural schematic diagram of an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention Figure 1 。

[0021] Figure 5 This is the structural schematic diagram of an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention Figure 2 。

[0022] Figure 6 This is the structural schematic diagram of an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention Figure 3 。

[0023] Figure 7 This is the partial structural schematic diagram of the first insulator in an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0024] Figure 8 This is the cross - sectional structural schematic diagram of the first insulator and the strip - shaped part at A - A in an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0025] Figure 9 This is the partial structural schematic diagram of the insulating cover in an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0026] Figure 10 This is the cross - sectional structural schematic diagram of the insulating cover and the strip - shaped part at A - A in an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0027] Figure 11 This is the cross - sectional structural schematic diagram of the insulating cover at A - A in an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0028] Figure 12 This is the present invention Figure 11 The partial enlarged structural schematic diagram at B; Figure 13 This is the cross - sectional structural schematic diagram of the insulating housing at A - A in an electromagnetic anti - power - fluctuation contactor with a dual - winding working mode according to the present invention.

[0029] In the figure: 10, insulating housing; 11, insulating cover; 110, mating groove; 111, blind hole; 114, relief groove; 115, guiding hole; 113, first strip-shaped hole; 12, movable shaft; 120, positioning surface; 121, limiting section; 122, releasing section; 123, connecting section; 13, second compression spring; 14, limiting post; 21, static iron core; 22, moving iron core; 23, first insulator; 230, clamping member; 231, first strip-shaped groove; 30, main contact one; 301, first compression spring; 31, main contact two; 33, auxiliary contact one; 34, auxiliary contact two; 35, strip-shaped member; 350, clamping groove; 351, limiting groove; 352, plate body; 353, first elastic member; 354, second elastic member; 360, rotating shaft; 361, triggering member; 3610, triggering end; 3611, pressing end; 40, holding coil; 41, attracting coil. Detailed implementation manners

[0030] Now, the present invention will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0031] Embodiment 1 As a specific implementation manner, the technical solution of the present invention is as follows: Refer to Figures 1 - 3 , an electromagnetic anti-sag power contactor with a dual-winding working mode, including: A voltage acquisition module for acquiring the supply voltage; A logic processing module for obtaining the acquisition data of the voltage acquisition module and analyzing the acquisition data; A power supply module for supplying power to the attracting coil 41 and the holding coil 40. After the contactor is powered on, the attracting coil 41 is powered on to make the contactor attract; and after the contactor attracts, the holding coil 40 is powered on to make the contactor maintain the attracted state; The power supply module further includes an energy storage module for storing electric energy. When the contactor is in the maintained attracted state and the fluctuation amount of the supply voltage exceeds a predetermined value, the logic processing module controls the energy storage module to supply power to the holding coil 40.

[0032] Specifically, it should be noted that refer to Figure 4 , Figure 5, the specific solution of this application is as follows: The electrical contactor includes a static iron core 21 and a moving iron core 22. The static iron core 21 can move in the direction of approaching and moving away from the moving iron core 22. An attracting coil 41 and a holding coil 40 are provided on the static iron core 21. The moving iron core 22 is connected to a first insulator 23, and a first main contact 30 is provided on the first insulator 23. A second main contact 31 corresponding to the first main contact 30 is also provided on the electrical contactor. The second main contact 31 is fixedly arranged. In specific applications, three first main contacts 30 are connected to the three-phase power supply of the power supply end, and three second main contacts 31 are connected to the downstream electrical equipment. Among them, the voltage acquisition module is used to acquire the three-phase power voltage, and the logic processing module is used to obtain the voltage acquired by the voltage acquisition module and analyze it; The power supply module includes an energy storage module and a power supply circuit. The power supply circuit is connected to the holding coil 40 and the attracting coil 41. The energy storage module includes an energy storage circuit connected to the power supply circuit. The power supply circuit is used to supply alternating current with a voltage of 220V to the attracting coil 41 when the electrical contact is attracted. After the attracting coil 41 is powered on, it generates magnetism to attract the moving iron core 22. When the moving iron core 22 moves, it pulls the first insulator 23 to move synchronously, so that the first main contact 30 changes from Figure 4 the separated state shown to the closed state where the first main contact 30 contacts the second main contact 31. The main contacts are closed. After the attracting coil 41 is powered on to make the contactor attracted, the logic control module controls the power supply module to switch to supply direct current of 24V. And when the power supply circuit supplies power to the attracting coil 41, it also supplies power to the energy storage circuit for energy storage at the same time, so that the attracting coil 41 is powered on. At this time, direct current of 24V is supplied to the attracting coil 41. The attracting coil 41 is powered on to generate magnetism and attract the moving iron core 22 to maintain the attracted state of the moving iron core 22. At the same time, the power supply circuit supplies power to the energy storage module to make the energy storage module store energy. Through the above setting method, when the anti-surge electrical contactor is in the attracted state, by supplying 220V alternating current to the attracting coil 41, the attracting coil 41 is powered on to generate a large magnetic force, so as to ensure that the electrical contactor has enough force to pull the moving iron core 22 to be attracted. After the moving iron core 22 and the static iron core 21 are attracted, the distance between them is relatively close. At this time, a smaller magnetic force is required to maintain the attracted state. At this time, the logic control module controls the power supply circuit to reduce the power supply voltage and supply power to the holding coil 40. After the holding coil 40 is powered on, it generates a smaller magnetic force to maintain the attracted state. The working power of the attracting coil 41 is small, and it has a better energy-saving effect compared with the existing electrical contactor. Compared with the ordinary electrical contactor, the energy-saving efficiency can reach more than 80%.

[0033] Further, as a preferred embodiment, when the holding coil 40 is energized to keep the contactor in the closed state, the power supply module supplies direct current to the holding coil 40. Preferably, after the electric contactor is closed, the logic control module controls the power supply circuit to supply 24V direct current to the holding coil 40. After the holding coil 40 is energized, a small magnetic force is generated to keep the closed state. By supplying direct current, the noise generated by the coil operation can be reduced, and the vibration is small, which improves the service life of the electric contactor. At the same time, the closed state of the electric contactor can be maintained with a lower operating power, and the energy-saving effect is good.

[0034] Further, when the holding coil 40 is energized to keep the contactor in the closed state, the holding coil 40 and the closing coil 41 are connected in series. Specifically, by connecting the holding coil 40 and the closing coil 41 in series in the holding state, and during the closing process of the electric contactor, only the closing coil 41 is connected. At this time, the current passing through the closing coil 41 is large, and the generated magnetic force is large, so as to ensure full closing. After the electric contactor is closed, the holding coil 40 and the closing coil 41 are connected in series to the circuit. At this time, the two are in series, and the resistance increases. Then, under a certain supply voltage, the power when the holding coil 40 and the closing coil 41 work together is small, which is more conducive to energy saving.

[0035] Further, as a specific embodiment, it further includes an auxiliary switch. Both ends of the auxiliary switch are respectively connected to both ends of the holding coil 40. The auxiliary switch is configured to be switched from the closed state to the open state when the contactor is switched from the open state to the closed state. Specifically, refer to Figure 1 , Figure 4 , the electric contactor is also configured with an auxiliary switch SW-PB-1. The auxiliary switch SW-PB-1 includes an auxiliary contact 33 and an auxiliary contact 34. When the electric contactor is in the Figure 4 open state shown, the contact between the auxiliary contact 33 and the auxiliary contact 34 means that the auxiliary switch SW-PB-1 is in the closed state. At this time, the holding coil 40 is short-circuited. Then, when the power supply module supplies power, only the closing coil 41 is energized. After the closing coil 41 is energized, it generates magnetism to attract the moving iron core 22, pulling the first insulator 23 to move so that the main contact 30 and the main contact 31 are in contact. Among them, the auxiliary contact 34 is connected to the first insulator 23, and the auxiliary instrument is connected to the outer shell of the electric contactor. When the first insulator 23 moves, it drives the auxiliary contact point 2 to move. When the first insulator 23 moves and drives the main contact 30 to switch to the closed state, it can drive the auxiliary contact 33 to move from the contact state with the auxiliary contact 34 to the separated state, so that the auxiliary switch SW-PB-1 is switched from the normally closed state to the open state. Refer to Figure 1, at this time, the holding coil 40 and the pulling-in coil 41 are kept in series, the holding coil 40 is energized, and the magnetic force generated by the holding coil 40 keeps the electric contactor in the pulled-in state. It should be noted that the specific structure of the electric contactor is referred to below.

[0036] Further, as a specific implementation manner, refer to Figures 1 - 3 , the power supply module includes a power supply circuit, the power supply circuit includes a rectification circuit and a relay, the normally-closed terminal of the relay is connected to the positive output terminal of the bridge rectification circuit, the common terminal of the relay is connected to the pulling-in coil 41, the other end of the pulling-in coil 41 is connected to the holding coil 40, and the other end of the holding coil 40 is connected to the negative output terminal of the rectification circuit.

[0037] Specifically, the rectification circuit includes diodes D16, D17, D18, and D19 connected in series end to end. A first connection terminal is connected between diodes D16 and D17, and the first connection terminal is used to connect to the first phase line L1. A second connection terminal is connected between diodes D18 and D19, and the second connection terminal is used to connect to the neutral line. The positive output terminal is arranged between diodes D16 and D19, and the negative output terminal is arranged between diodes D18 and D17. During the actual working process, the positive output terminal is connected to the normally-closed terminal 7 of the relay. Refer to Figure 2 , the common terminal of the relay is connected to the pulling-in coil 41, the other end of the pulling-in coil 41 is connected to the holding coil 40, and the other end of the holding coil 40 is connected to the negative output terminal. The auxiliary switch SW-PB-1 is in the closed state initially. When the electric contactor is pulled in, it is powered by the first phase line, and the relay is in the state where the common terminal is connected to the normally-closed terminal. At this time, the first phase line supplies 220V alternating current to the pulling-in coil 41. After the pulling-in coil 41 is energized, it generates a magnetic force to attract the static iron core 21 to generate a magnetic force to attract the moving iron core 22, so that the electric contactor is closed. After closing, the interlocking auxiliary switch SW-PB-1 is opened. Then, at this time, the pulling-in coil 41 and the holding coil 40 are in series. At this time, the rectification circuit is controlled to work to supply 24V direct current, and the relay maintains the initial working state. Then, at this time, the holding coil 40 and the pulling-in coil 41 are powered to keep the electric contactor in the pulled-in state.

[0038] Further, as a specific implementation manner, refer to Figure 2, the energy storage module includes an energy storage circuit. The first end of the energy storage circuit is respectively connected to the positive output end of the power supply circuit and the normally open end of the relay. The second end of the energy storage circuit is connected to the negative output end of the power supply circuit. A first diode is provided between the first end and the positive output end, and a second diode is provided between the first end and the normally open end. The negative pole of the first diode is connected to the first end, and the positive pole of the second diode is connected to the first end. Specifically, a first diode D20 is provided between the first ends of the energy storage circuit. The first diode D20 can allow the forward voltage to pass through and be connected to the energy storage circuit. The second end of the energy storage circuit is connected to the negative output end, so as to supply power to the energy storage circuit when the rectifier circuit supplies 24V DC power, enabling the energy storage circuit to store energy.

[0039] Further, as a specific implementation manner, the energy storage module includes at least one capacitor. The positive pole of the capacitor is connected to the first end, and the negative pole is connected to the second end. Specifically, the energy storage module includes two capacitors C1 and C2 connected in series to store energy through the capacitors C1 and C2.

[0040] Further, as a specific implementation manner, when the power supply voltage fluctuation amount exceeds a predetermined value, the logic processing module controls the relay to switch from the normally closed end to the normally open end. Specifically, continue to refer to Figure 2 , the logic processing module is used to obtain the voltage values of the three-phase power in real time. When the fluctuation of the voltage values of the three-phase power exceeds a predetermined value, it controls the relay to switch, so that the common end of the relay is connected to the normally open end 6. At this time, the energy storage module can supply power. When the energy storage module supplies power, the current flows out from the positive pole of the capacitor, passes through the second diode D3, then flows through the relay to the pull-in coil 41 and the holding coil 40, and then returns to the negative pole of the capacitor, so as to supply power through the energy storage module and maintain the pulling-in state of the anti-power-failure contactor. Within a predetermined time period, if the voltage values of the three-phase power are restored, the relay switches to the initial state where the common end is connected to the normally closed end 7, and the power supply circuit continues to supply power to the coil, and the energy storage module stores energy to keep the contactor in the pulling-in state.

[0041] Further, refer to Figure 2 、 Figure 3 , as a specific implementation manner, Figure 3It is a control circuit diagram of a relay. Terminal a is connected to terminal b, terminal b is connected to the collector of triode Q2, and the emitter of triode Q2 is grounded. It also includes thyristor Q3, diode D5, resistor R12, resistor R15, zener diode D21, and optocoupler P620. When working, when the voltages of phase lines L1, L2, and L3 are within the normal range, the optocoupler P620 works normally and is in the conducting state. At this time, the current passing through resistor R12 passes through diode D15 and optocoupler P620 in sequence. At this time, thyristor Q3 is not conducting, so triode Q2 is in the cut-off state, and the relay is in the normally closed state. When the fluctuations of phase lines L1, L2, and L3 exceed the predetermined value, the intensity of the electrical signal received by the light-emitting diode end of the optocoupler P620 decreases, the optocoupler P620 cuts off or the output current decreases. At this time, the current passing through resistor R12 flows through thyristor Q3, and thyristor Q3 is in the conducting state. Then triode Q works in the amplification state, and the relay works and switches to the normally open end. After the voltages of phase lines L1, L2, and L3 return to the normal value, the optocoupler P620 returns to the conducting state, and the relay returns to the initial normally closed working state.

[0042] Further, as a specific implementation manner, the supply voltage fluctuation exceeding the predetermined value includes: any one of the three-phase supply voltages suddenly drops and is lower than 65%-75% of the rated voltage. The three-phase voltages are respectively detected by the voltage acquisition module. When any one-phase voltage drops to 65%-75% of the rated voltage, the specific selected values are 65%, 70%, and 75%. The larger the selected value, the higher the anti-surging sensitivity of the contactor. Preferably 70%; when any one-phase voltage drops to 70% of the rated voltage, the relay is controlled to work and switch, so as to effectively ensure the probability of the contactor opening due to voltage fluctuation.

[0043] Further, within a predetermined time duration, when the suddenly dropped voltage returns to not less than 90% of the rated voltage, the logic processing module controls the relay to switch from the normally open end to the normally closed end. Specifically, the value range of the predetermined time duration is not greater than 3 seconds. Within the predetermined time duration range, when the fluctuating voltage returns to 90% of the rated voltage, the downstream can be effectively powered. At this time, the relay is controlled to switch to the state where the initial common terminal is connected to the normally closed terminal, and the energy storage module is in the charging state, so as to ensure that the energy storage module has sufficient electric energy to cope with the next power surge.

[0044] Embodiment 2 This application provides an electromagnetic anti-surging contactor with a dual-winding working mode. In order to better explain the working principle and structure of the anti-surging contactor, refer to Figure 4 - Figure Figure 12, the specific structure of the anti - power - failure contactor is as follows: It includes a static iron core 21, an insulating housing, and an insulating cover 11 detachably connected to the insulating housing. The static iron core 21 is arranged inside the insulating housing. The first insulator 23 is in guiding sliding fit with the insulating cover 11. The first insulator 23 is provided with a clamping member 230. The moving iron core 22 is clamped and fitted with the first insulator 23 through the clamping member 230. The attracting coil 41 and the holding coil 40 are arranged on the static iron core 21. The moving iron core 22 is provided with a permanent magnet. A return spring (not shown in the figure) is arranged between the static iron core 21 and the moving iron core 22. When the coil is not energized, under the elastic force of the return spring, the static iron core 21 and the moving iron core 22 remain in Figure 4 the separated state shown. When the attracting coil 41 is energized, the static iron core 21 generates magnetism and attracts the moving iron core 22 to move.

[0045] Further, three main contacts one 30 and three main contacts two 31 are arranged on the first insulator 23. A first compression spring 301 is arranged between the main contact one 30 and the first insulator 23. The main contact two 31 is arranged on the insulating cover 11. When the first insulator 23 moves, it drives the main contact one 30 to contact the main contact two 31, and under the elastic force of the first compression spring 301, the main contact one 30 and the main contact two 31 are in close contact for conduction, completing the closing of the main contacts.

[0046] Further, referring to Figures 4 - 13 , along the guiding sliding direction, a first strip - shaped groove 231 is arranged on the side of the first insulator 23. A mating groove 110 corresponding to the first strip - shaped groove 231 is arranged on the insulating cover 11. A strip - shaped member 35 is arranged in the mating groove 110 in a guiding manner. The strip - shaped member 35 is provided with a plate body 352 extending into the first strip - shaped groove 231. Referring to Figure 4 , when the contactor is in the initial non - closed state, the relative positions of the strip - shaped member 35 and the first insulating member are as Figure 8 shown. The first insulating plate is at the middle position of the first strip - shaped groove 231. A first elastic member 353 and a second elastic member 354 are respectively arranged on both sides of the plate body 352. Both the first elastic member 353 and the second elastic member 354 are compression springs. In Figure 8 the state shown, the first elastic member 353 is in a compressed state, and the second elastic member 354 is in a free state or a compressed state. At this time, the elastic force of the first elastic member 353 on the plate body 352 is greater than the elastic force of the second elastic member 354 on the plate body 352. A clamping groove 350 is arranged on the strip - shaped member 35. The auxiliary contact two 34 is clamped and fitted with the clamping groove 350. Referring to Figure 4 , at this time, the auxiliary contact two 34 is in a state of contacting the auxiliary contact one 33. At this time, the first elastic member 353 provides the force for the auxiliary contact two 34 and the auxiliary contact one 33 to be pressed and contacted tightly.

[0047] Further, referring to Figures 9 - 12, on one end face of the insulating cover 11 close to the insulating housing, a blind hole 111 is provided. An active shaft 12 is guidingly arranged in the blind hole 111. A guiding hole 115 perpendicular to the blind hole 111 is provided on the side wall of the blind hole 111. A limiting post 14 is guidingly arranged in the guiding hole 115. A limiting groove 351 adapted to the limiting post 14 is provided on the side surface of the strip-shaped member 35; along the direction from the bottom to the orifice of the blind hole 111, the outer peripheral surface of the active shaft 12 includes a positioning surface 120, a limiting section 121, a connecting section 123, and a releasing section 122 that are sequentially connected. Both the limiting section 121 and the releasing section 122 are cylindrical surfaces coaxial with the active shaft 12. The radius of the releasing section 122 is smaller than that of the limiting section 121. The connecting section 123 is a conical surface connecting the limiting section 121 and the releasing section 122. A second compression spring 13 is arranged between the bottom of the blind hole 111 and the active shaft 12. Through this setting method, refer to Figure 9 , in the initial state, the limiting groove 351 and the limiting section 121 correspond to the limiting post 14. At this time, under the elastic force of the second compression spring 13, the annular positioning surface 120 abuts against the limiting post 14. The limiting post 14 limits the active shaft 12, making the lower end of the active shaft 12 lower than the lower end face of the insulating cover 11. At the same time, the limiting post 14 is limited by the limiting section 121, keeping the limiting post 14 in the limiting state where the end extends into the limiting groove 351.

[0048] Further, before the suction coil 41 is energized, under the elastic force of a return spring (not shown in the figure), the moving iron core 22 is pushed to be in the Figure 4 shown initial state. At this time, the strip-shaped member 35, the active shaft 12, the limiting post 14, and the insulating cover 11 are kept in the Figures 5 - 12 shown state. When the suction coil 41 is energized and pulls the moving iron core 22 to move towards the static iron core 21, since the limiting post 14 limits the strip-shaped member 35, the strip-shaped member 35 will not move at this time and remains in the Figure 4 shown state. The first auxiliary contact 33 and the second auxiliary contact 34 remain in contact. At this time, the auxiliary switch SW-PB-1 remains closed. As the static iron core 21 moves, the first insulator 23 is pulled to move, thereby compressing the second elastic member 354, and the first elastic member 353 rebounds, so that the elastic force of the second elastic member 354 is greater than that of the first elastic member 353.

[0049] Further, refer to Figure 5 、 Figure 12 , on one side of the insulating housing 10 close to the insulating cover 11, an installation groove is provided. A rotating shaft 360 and a triggering member 361 are rotatably arranged on the side wall of the installation groove. The middle position of the triggering member 361 is rotatably connected to the rotating shaft 360. The triggering member 361 includes a triggering end 3610 corresponding to the end face of the first insulator 23 and a pressing section corresponding to the active shaft 12. When the electrical contactor is in the Figure 5In the initial state shown, the extrusion section is able to contact the end of the movable shaft 12, so that the trigger end 3610 is in Figure 13 In the state of extending out of the mounting slot as shown, when the pull-in coil 41 is energized to switch the electric contactor to the pull-in state, the end face of the first insulator 23 is contacted and squeezed with the trigger end 3610 under the action of the magnetic attraction of the pull-in coil 41, thereby pushing the trigger member 361 to swing under the action of the lever, pushing the movable shaft 12 through the squeezing section, so that the movable shaft 12 resists the elastic force of the second compression spring 13 and moves, so that the release section 122 of the movable shaft 12 corresponds to the limiting column 14. At this time, the limiting column 14 can retract inwardly, and the limiting column 14 loses the limit on the strip member 35. Then, under the elastic force of the second elastic member 354, the limiting column 14 loses the limit on the strip member 35. The strip 35 is pushed to move, and the strip 35 drives the auxiliary contact 1 33 and the auxiliary contact 2 34 to separate, so that the auxiliary switch SW-PB-1 is opened, thereby achieving the effect of linking the auxiliary switch SW-PB-1 to open. Through this setting method, it can be ensured that the auxiliary switch SW-PB-1 is disconnected only when the attraction coil 41 is energized to attract the moving iron core 22 to move so that the first insulator 23 contacts the upper end surface of the insulating shell 10 so that the moving iron core 22 and the static iron core 21 are fully attracted, and the coil 40 is switched to be energized, thereby ensuring that the electric contactor can work effectively and improving the working stability of the electric contactor.

[0050] Furthermore, as a preferred embodiment, an avoidance groove 114 is provided on the end surface of the insulating cover 11. By providing the avoidance groove 114, the extrusion end 3611 can be avoided, ensuring that the trigger member 361 can swing effectively.

[0051] Further, when the electrical contact needs to be switched from the closed state to the initial open state, the holding coil 40 is de-energized, and the moving iron core 22 and the first insulator 23 are pushed back under the elastic force of the return spring (not shown in the figure). During the return of the first insulator 23, the first insulator 23 is separated from the trigger 361. At this time, under the elastic force of the second compression spring 13, the movable shaft 12 has a tendency to return. Since the limit post 14 and the limit groove 351 do not correspond at this time, the connecting section 123 contacts the end of the limit post 14 and maintains the current state. As the first insulator 23 returns, the second elastic member 354 gradually returns, and the elastic force of the first elastic member 353 on the plate body 352 gradually equals the elastic force of the second elastic member 354 on the plate body 352. As the first insulator 23 continues to move, since the limit post 14 exerts a squeezing force on the strip 35, there is a certain frictional force F between the strip 35 and the ends of the first insulator 23 and the limit post 14. Then the first elastic member 353 is compressed. When the elastic force of the first elastic member 353 is greater than the sum of the elastic force of the second elastic member 354 on the plate body 352 and the frictional force F, the strip 35 is pushed back under the elastic force of the first elastic member 353 until the limit groove 351 coincides with the limit post 14. Then, under the elastic force of the second compression spring 13, the movable shaft 12 continues to move, squeezing the limit post 14 into the limit groove 351 to limit the strip 35, and returning to Figure 4 the initial state shown.

[0052] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An electromagnetic anti-sway contactor with a dual-winding working mode, characterized in that: include: Voltage acquisition module, used to collect power supply voltage; A logic processing module is used to obtain the collected data of the voltage collection module and analyze the collected data; A power supply module is used to supply power to the pull-in coil (41) and the holding coil (40); after the contactor is powered on, the pull-in coil (41) is powered on to close the contactor; and after the contactor is closed, power is supplied to the holding coil (40) to keep the contactor in a closed state; The power supply module also includes an energy storage module for storing electric energy. When the contactor is in a closed state and the fluctuation of the power supply voltage exceeds a predetermined value, the logic processing module controls the energy storage module to supply power to the holding coil (40).

2. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 1, characterized in that: When the holding coil (40) is energized to keep the contactor in a closed state, the power supply module supplies direct current to the holding coil (40).

3. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 2, characterized in that: When the holding coil (40) is energized to keep the contactor in a closed state, the holding coil (40) and the closing coil (41) are connected in series.

4. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 3, characterized in that: It also includes an auxiliary switch, the two ends of which are respectively connected to the two ends of the holding coil (40), and the auxiliary switch is configured to be linked to switch from a closed state to an open state when the contactor switches from an open state to an attracted state.

5. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 4, characterized in that: The power supply module comprises a power supply circuit, which comprises a rectifier circuit and a relay, wherein the normally closed end of the relay is connected to the positive output end of the bridge rectifier circuit, the common end of the relay is connected to the pull-in coil (41), the other end of the pull-in coil (41) is connected to the holding coil (40), and the other end of the holding coil (40) is connected to the negative output end of the rectifier circuit.

6. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 5, characterized in that: The energy storage module includes an energy storage circuit, wherein the first end of the energy storage circuit is respectively connected to the positive output end of the power supply circuit and the normally-open end of the relay, the second end of the energy storage circuit is connected to the negative output end of the power supply circuit, a diode 1 is arranged between the first end and the positive output end, a diode 2 is arranged between the first end and the normally-open end, the cathode of the diode 1 is connected to the first end, and the anode of the diode 2 is connected to the first end.

7. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 6, characterized in that: The energy storage module includes at least one capacitor, a positive electrode of the capacitor is connected to the first end, and a negative electrode of the capacitor is connected to the second end.

8. The electromagnetic anti-sway contactor with dual winding working mode according to claim 7, characterized in that: When the power supply voltage fluctuation exceeds a predetermined value, the logic processing module controls the relay to switch from the normally closed end to the normally open end.

9. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 1, characterized in that: The power supply voltage fluctuation exceeding the predetermined value includes: any phase of the three-phase power supply voltage drops suddenly and is lower than 65%-75% of the rated voltage.

10. The electromagnetic anti-sway contactor with a dual-winding working mode according to claim 9, characterized in that: When the voltage drop recovers to no less than 90% of the rated voltage within a predetermined time period, the logic processing module controls the relay to switch from the normally open end to the normally closed end.

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