249 results about "Electromagnetic system" patented technology

The invention provides an electric power and magnetic power dynamic joint detection method and system based on multivariable fusion, and relates to the technical field of power electronic equipment detection. According to the method, voltage, current and magnetic field sensors are arranged in a to-be-tested electromagnetic system, original physical quantity data are collected, and a multivariable time sequence data set is constructed; through preprocessing and feature extraction, a dynamic feature matrix related to electric power and magnetic power is generated; constructing a joint estimation model based on the matrix, and comparing the joint estimation model with a reference value to obtain a detection residual error; generating a state label according to the residual size and trend, and evaluating the estimation credibility in combination with a confidence interval; and a feedback mechanism is further constructed, model parameters and feature structures are optimized by adopting an adaptive algorithm, and online iteration and self-learning are realized. The method is high in detection precision, high in state recognition capability, good in adaptability and robustness, and suitable for energy flow monitoring and intelligent diagnosis of a complex electromagnetic system.

The utility model relates to the technical field of projection display, in particular to a laser speckle eliminator and projection equipment, the laser speckle eliminator comprises a stator part and a rotor part, the stator part comprises a substrate, and a vibration assembly and a first diffusion sheet which are arranged on the substrate; the mover part comprises an elastic assembly connected with the substrate and a second diffusion sheet arranged on the elastic assembly, and the second diffusion sheet and the first diffusion sheet are oppositely arranged; when the vibration assembly vibrates, the elastic assembly drives the second diffusion sheet to vibrate through resonance so that the second diffusion sheet can move relative to the first diffusion sheet, and the laser speckle eliminator does not need an electromagnetic system, reduces parts and is simple in structure.

The present invention relates to a small-volume magnetic latching relay for smart homes. It solves the problem of existing relays becoming larger as the load increases. The relay comprises a mounting base, an electromagnetic mounting structure disposed in the middle of the mounting base, an L-shaped armature connection assembly disposed on the electromagnetic mounting structure, the L-shaped armature connection assembly and the electromagnetic mounting structure forming an installation space, an electromagnetic system assembly disposed within the installation space, one end of the L-shaped armature connection assembly being connected to the upper end of the electromagnetic system assembly in an opening and closing manner, an electromagnetic return mechanism disposed on one side of the L-shaped armature connection assembly, one side of the electromagnetic return mechanism being plugged into the L-shaped armature connection assembly, a dynamic spring mechanism disposed on one side of the electromagnetic return mechanism, a static spring mechanism disposed on one side of the dynamic spring mechanism, and an assembly housing disposed circumferentially around the mounting base that encloses the entire device. The present invention has the advantages of simplifying the internal structure of the relay, minimizing the assembly volume of the relay, and extending its applicability.

The invention belongs to the technical field of magnetic variable measurement, and particularly relates to a power driving compensation method and system for magnetostrictive load characteristic monitoring, and the method comprises the steps: obtaining a reference zero point of magnetic performance evolution in a cold state environment of an electromagnetic system according to the center frequency of the electromagnetic system; calculating a current main frequency impedance module value and a phase difference through an electrical parameter characterization method, and obtaining a thermal drift index reflecting a hysteresis loop distortion degree in combination with a reference zero point; obtaining correction factors of all orders based on the thermal drift index and the average output power at the current moment, and dynamically updating a coefficient vector of the inverse model; and constructing a pre-distortion driving voltage signal capable of counteracting nonlinear interference by using the new coefficient and the ideal guided wave voltage sequence, and inputting the pre-distortion driving voltage signal to a power amplifier to drive the magnetostrictive transducer. According to the invention, the problem of predistortion failure under a variable-temperature working condition in the prior art is solved, and the signal-to-noise ratio of high-power long-distance guided wave detection is remarkably improved.

This invention belongs to the field of curing and molding of short fiber composite materials, and discloses an apparatus and method for three-dimensional oriented curing and molding of short fibers. The orientation device of this invention includes a storage tank for holding the short fiber curing solution, a base for fixing the entire device, a horizontal rotation system for controlling the horizontal angle of the fibers, a vertical rotation system for controlling the vertical rotation angle of the fibers, and an electromagnetic system and a control system for providing an electromagnetic field. Under the command of the control system, the electromagnetic system generates an electromagnetic field, which is then used for magnetic field positioning under the drive of the horizontal and vertical rotation systems. The electromagnetic field then orients the magnetized short fibers. This apparatus and method can achieve three-dimensional orientation of short fibers in a matrix material, effectively improving the mechanical properties of short fiber reinforced composite materials and further enhancing the designability of short fiber composite materials.

The invention discloses an arbitrary elliptical polarization programmable array antenna construction method. A single multi-polarization reconfigurable antenna can only realize a plurality of discrete polarization states and cannot realize receiving or transmitting of any elliptical polarization electromagnetic wave. According to the method, expected elliptical polarization is decomposed into superposition of vectors in the long axis direction and the short axis direction of an ellipse, four alternative polarization states are selected according to projection values of a multi-linear polarization reconfigurable unit in the two directions, then the number of the four alternative polarization states is calculated, and the polarization states of array units are randomly distributed according to the calculated number. And finally, receiving or transmitting any elliptical polarization electromagnetic wave according to the wave beam direction and the expected elliptical polarization configuration unit excitation phase. Polarization resources of electromagnetic waves can be fully utilized, and the method plays a significant role in expanding the capacity of a wireless electromagnetic system, improving the receiving and transmitting efficiency of the system, resisting external interference and the like.

The invention discloses a continuous operation gravity energy storage device coupled with magnetic field force and an operation method.The device comprises a top storage platform, a ground platform, an energy storage box, a steel cable, a continuously variable transmission, a controller and an electromagnetic system, the top storage platform is arranged above the ground platform, and the energy storage box is vertically hung below the continuously variable transmission through the steel cable; an energy storage weight can be loaded in the box, the electromagnets and the permanent magnets at the top of the energy storage box keep homopolar repulsion, and the electromagnets and the permanent magnets at the bottom of the energy storage box form heteropolar attraction; the controller accurately controls the magnetic field acting force in the lifting process of the energy storage box by adjusting the current intensity of the electromagnet and the rotating speed of the continuously variable transmission, kinetic energy sudden change in the acceleration / deceleration stage of the energy storage weight is dynamically compensated through the magnetic field force, and two sets are arranged to achieve continuous power generation. Through cooperative control of electromagnetic force and mechanical transmission, the rapid response capability of the system to power grid demand fluctuation is remarkably enhanced, meanwhile, the mechanical loss of equipment is reduced, and the application scene of the gravity energy storage technology is expanded.

A switching device comprises an electromagnetic system and two contact systems, the electromagnetic system comprises a coil assembly, a movable iron core and a static iron core, a magnetic gap is reserved between the movable iron core and the static iron core, each contact system comprises a movable contact assembly and a static contact assembly which are matched with each other, and the electromagnetic system is arranged between the two contact systems. The movable iron core is in linkage connection with a linkage piece, the two ends of the linkage piece are in linkage connection with the movable contact assemblies of the two contact systems respectively, under driving of the electromagnetic system, the moving tracks of the movable contact assemblies, the movable iron core and the linkage piece are all parallel to the central axis of the linkage piece, and the central axis of the linkage piece is connected between the two ends of the linkage piece. According to the utility model, the two contact units are respectively arranged at the two opposite sides of the electromagnetic system, the two ends of the linkage piece can drive the moving contact assembly, and meanwhile, the moving tracks of the moving contact assembly, the moving iron core and the linkage piece are parallel to the central axis of the linkage piece, so that the occupied space is small, and the size of the switching device is reduced.

The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker, a major loop structure of the circuit breaker comprises an operating piece, an electromagnetic system, a contact system, an arc extinguishing system and a control system, the operating piece slides in a reciprocating manner to drive the contact system to be closed and opened through the electromagnetic system, and the control system controls the electromagnetic system to act to drive the contact system to be closed and opened; the main loop structure further comprises a sampling device, and when overload and / or short-circuit current flows through the contact system, the electromagnetic system is controlled by the control system to drive the contact system to be disconnected; the circuit breaker is simple in structure and can be suitable for various current protection thresholds.

The utility model relates to a relay. The relay includes: a base; the contact assembly comprises a first movable spring part, a second movable spring part, a first static spring part and a second static spring part which are arranged on the base, the first movable spring part is opposite to the first static spring part, the second movable spring part is opposite to the second static spring part, and at least part of the first static spring part can generate flexible deformation; the electromagnetic system is arranged on the base and used for driving the first movable spring part and the second movable spring part to move in the direction close to or away from the first static spring part and the second static spring part. And the stroke difference that the electromagnetic system drives the first movable spring part and the first static spring part to make contact is smaller than the stroke difference that the electromagnetic system drives the second movable spring part and the second static spring part to make contact. According to the relay, the first static spring part can absorb contact stress through flexible deformation, and the first static spring part and the first movable spring part are prevented from being damaged and deformed due to stress.

The magnetic separation column comprises an ore feeding hopper, a tailing overflow groove, a separation column body, an electromagnetic system, a concentrate opening and a water feeding pipe, the ore feeding hopper is arranged at the top of the separation column body, the lower portion of the separation column body is communicated with the separation column body, the tailing overflow groove is formed in the upper portion of the separation column body, the concentrate opening is formed in the bottom of the separation column body, and the electromagnetic system is arranged outside the separation column body in a sleeved mode. The water supply pipe is inserted into the lower part of the sorting column; the device is characterized by further comprising a magnetism gathering medium body, the magnetism gathering medium body is fixedly arranged in the separation column, and the top of the magnetism gathering medium body corresponds to the uppermost electromagnetic system. According to the utility model, the phenomenon that fine-particle magnetite moves upwards along with rising water flow and enters tailings to cause black running is effectively avoided, so that the recovery rate of iron ore concentrate is increased, and the grade of the tailings is reduced.

The utility model provides a permanent magnet type electromagnetic system and a contactor. The permanent magnet type electromagnetic system comprises a static iron core, two coil windings, a movable iron core and a magnetic conduction driving assembly. The two coil windings are arranged on the static iron core; the movable iron core is arranged opposite to the static iron core along a first direction; the magnetic conductive driving assembly is connected with the movable iron core, a first magnetic field force is generated between the magnetic conductive driving assembly and the static iron core, the first magnetic field force is used for driving the magnetic conductive driving assembly to move towards the movable iron core so as to reset the movable iron core, and a second magnetic field force is generated between the movable iron core and the static iron core so as to reset the movable iron core. And a third magnetic field force is generated between the static iron core and the coil winding. The third magnetic field force is opposite to the first magnetic field force, and the second magnetic field force is opposite to the first magnetic field force. The moving stroke of the movable iron core can be effectively improved.

The invention relates to the technical field of electrical elements, and discloses a switching-on mechanism, the switching-on mechanism is used for connecting an electromagnetic system, the electromagnetic system comprises a yoke plate and a push rod penetrating out of the yoke plate, the switching-on mechanism comprises a support, a button assembly and a limiting maintaining assembly, and the support is used for connecting the yoke plate; the button assembly is movably connected with the support and has an initial position and a switching-on position, the button assembly can move from the initial position to the switching-on position under the action of external force so as to push the push rod to switch on, the limiting and maintaining assembly is movably connected with the support, and the moving direction of the limiting and maintaining assembly and the moving direction of the button assembly form an included angle. And at the closing position, the limiting maintaining assembly abuts against the button assembly in the moving direction of the button assembly and limits and blocks the button assembly from moving from the closing position to the initial position, and convenience is provided for the power-off maintenance process of the electromagnetic relay in an integrated installation mode.

The invention provides a switching device of a contactor and the contactor, and relates to the technical field of low-voltage electric appliances, the switching device comprises a rocker arm assembly and a travel switch which are arranged in a linkage mode, the rocker arm assembly is further used for being in linkage with a contact system and an electromagnetic system, the electromagnetic system comprises a pull-in coil and a holding coil which are connected in parallel, and the travel switch is connected with the pull-in coil; the electromagnetic system drives the rocker arm assembly to rotate, so that the rocker arm assembly drives the contact system to be closed, the rocker arm assembly drives the travel switch to act, so that the suction coil is disconnected, and closing is completed through the holding coil. The suction coil and the holding coil jointly act to drive the rocker arm assembly to rotate initially in a high-power mode, once the rocker arm assembly triggers the travel switch, the suction coil is disconnected, and closing continues to be conducted through the low-power holding coil so as to save energy. The rocker arm assembly triggers the travel switch, so that a pure mechanical structure is used for controlling coil attraction, switching of two working modes is kept, the number of electronic devices is reduced, reliable working of products is guaranteed, and cost is reduced.

The application belongs to the technical field of wind turbine simulation, and provides a wind turbine full-closed loop simulator and method based on a field programmable gate array, which comprises a field programmable gate array chip, an ARM chip and a digital-analog interface connected with the field programmable gate array chip; the application adopts the field programmable gate array chip, and realizes transient real-time simulation of the electromagnetic system of the wind turbine by means of the powerful parallel computing capability of the field programmable gate array chip; compared with the prior art, the application can quickly verify the effect of the control strategy by using the built-in controller, and can access the actual wind turbine controller through the digital-analog interface to perform hardware-in-the-loop simulation and test the control effect; meanwhile, the ARM chip is used as a real-time operation carrier of the wind turbine controller algorithm, and the field programmable gate array chip and the ARM chip interact with real-time data through a digital-analog channel to realize a wind turbine closed loop real-time simulation platform.

The invention discloses an aluminum water filtering method and device, and relates to the technical field of aluminum water purification, and the method comprises the following steps: carrying out coarse filtration on aluminum water containing impurities; the aluminum water subjected to coarse filtration is pretreated; carrying out primary filtration on the pretreated molten aluminum; the aluminum water subjected to primary filtration enters an intermediate area and is activated by an electromagnetic coil to attract metal impurities; carrying out secondary filtration on the activated molten aluminum; and the aluminum water subjected to secondary filtration flows out of the discharge hole. The device comprises a feed port, a filter unit, an electromagnetic system, a discharge port and a control terminal. The filtering efficiency is improved, the service life is prolonged, and the maintenance cost is reduced.

This invention discloses a method and system for resampling time-domain data of electromechanical-electromagnetic simulations while preserving time-frequency domain features. It includes: constructing electromechanical and electromagnetic transient time-series trajectory samples of a new energy power grid system; processing the trajectory samples separately using an improved Proni method to obtain frequency domain response features; reconstructing the electromechanical and electromagnetic transient time-series trajectories separately using linear interpolation and adaptive resampling techniques based on the frequency domain response features; and fusing the time-domain and frequency-domain features in the reconstructed time-series trajectory data to form a comprehensive feature vector, thereby obtaining electromechanical-electromagnetic simulation time-domain data that preserves time-frequency domain features. This invention solves the asynchronous sampling problem of electromechanical-electromagnetic time-domain simulation data and can be used to support the feature analysis of inconsistent data at different time scales in electromechanical and electromagnetic systems. It has broad application prospects and significant practical implications in fields such as scheduling and control of new energy power grids.

The present invention provides a magnetic latching relay, comprising an electromagnetic system, a contact system and a restoring spring. The electromagnetic system drives the contact system to switch between a self-holding state in which the contacts are in contact and a restoring state in which the contacts are separated by controlling the activity of the armature. The restoring spring is fixed on the electromagnetic system and has an elastic part extending therefrom with a stiffness smaller than that of the movable spring of the contact system. The elastic part is located between the armature and the contact system and extends along the width direction of the armature. In the restoring state, the elastic part maintains a certain gap with the armature. When switching from the restoring state to the self-holding state, the armature contacts the elastic part and drives the elastic part to deform. In the self-holding state, the deformation of the elastic part of the restoring spring and the contact pressure together constitute a reaction force system, ensuring that the asymmetric magnetic circuit provides a reaction force to smoothly disconnect the contacts when restoring; the armature moves smoothly and the switching is more reliable.

A magnetic latching relay comprises a base, an electromagnetic system, an armature, a push rod, a magnetic steel part and a main contact assembly, the electromagnetic system, the armature, the push rod, the magnetic steel part and the main contact assembly are installed on the base, the electromagnetic system is connected with the armature, the armature is connected with the push rod, the push rod is connected with the main contact assembly, and the magnetic steel part is arranged beside the main contact assembly. The switch further comprises an auxiliary contact assembly installed on the base, the auxiliary contact assembly comprises an auxiliary movable reed and an auxiliary static reed which are oppositely arranged, the push rod comprises an auxiliary contact push part, and the auxiliary contact push part is matched with the auxiliary movable reed to drive the auxiliary movable reed to make contact with or be separated from the auxiliary static reed. The auxiliary contact assembly further comprises an auxiliary contact protective cover, and the auxiliary movable reed and the auxiliary static reed are arranged in the auxiliary contact protective cover. The auxiliary contact protective cover can protect the auxiliary movable reed and the auxiliary static reed, and improves the contact reliability of the auxiliary contact.

The present application relates to the technical field of geophysical electromagnetic exploration data processing, and specifically discloses a kind of orthogonal digital phase-sensitive detection time-frequency electromagnetic complex response extraction method, automatically extracts base frequency and initial phase using transmitter stored time-stamped current data, constructs zero initial phase orthogonal reference signal, carries out two-way digital phase-sensitive detection to receiver full waveform sampling data, obtains in-phase component and quadrature component, so as to calculate the complex response amplitude and phase information of target frequency.The present application does not need analog phase-locked loop and artificial phase modulation process, can stably extract complex response parameters under strong interference and strong noise background, is especially suitable for array time-frequency electromagnetic receiver full waveform sampling data post-processing, without transmitting current waveform to each receiving node in real time, improves the flexibility and scalability of time-frequency electromagnetic system.

The application discloses a small-sized circuit breaker clapping type electromagnetic system with high magnetic efficiency, which comprises a magnetic yoke, and a armature is arranged above the magnetic yoke; the armature comprises a shaft pin part and a magnetic concentration part, and a recess part is further arranged on the magnetic concentration part; wherein the recess part is recessed towards the magnetic yoke. In summary, without reducing the magnetic increase of the magnetic yoke to the static contact rod, the recess part is arranged in the normal working air gap path of the armature, the distance from the current conductor is reduced, the electromagnetic force is larger and more concentrated in the working air gap, the magnetic path surface is larger, the suction is sufficient under low current (such as 32A and below), the action is sensitive, the magnetic flux leakage is minimum, and the large current working condition is considered.

The application relates to the field of switch electric appliances, in particular to a contactor with built-in fuse. The contactor with built-in fuse comprises a first contactor and a second contactor, the first contactor comprises a first electromagnetic system, a first cover shell, a first movable contact bridge, a first static contact and a second static contact; the second contactor comprises a second electromagnetic system, a second cover shell, a second movable contact bridge, a third static contact and a fourth static contact; the contactor further comprises a fuse, the fuse comprises a third cover shell, a first fuse static contact, a second fuse static contact and a fuse body; the second static contact, the first fuse static contact, the fuse body, the second fuse static contact and the fourth static contact are connected in series. The contactor with built-in fuse has the advantages that the first contactor, the fuse and the second contactor are integrated and connected in series, the copper bars and the fuse base between devices are reduced, and the contactor has the functions of conduction and breaking under normal current and the fuse has the function of melting under short-circuit current.

The invention discloses an antenna for carrying out electromagnetic radiation and receiving by using a rotary wing of an unmanned aerial vehicle and a design method thereof, and the method comprises the steps: 101, carrying out the modeling of a rotor-antenna conformal structure, and building a rotor-antenna integrated three-dimensional parameterized model; 102, designing a rotary conduction feed structure, and designing a high-speed coaxial rotary joint according to impedance continuity, mode integrity and isolation indexes of a static end and a moving end; 103, carrying out time-varying electromagnetic modeling and optimization analysis; 104, carrying out multi-rotor collaborative design, and coordinating the phase and angle relationship of each rotor; and 105, implementing and verifying. The arrangement form of the antenna array on the unmanned aerial vehicle is innovatively provided, the antenna is deployed by highly utilizing the structure of the unmanned aerial vehicle, the formed array can realize the functions of enhancing communication, navigation interference resistance and the like of the unmanned aerial vehicle by utilizing rotation information, and the unmanned aerial vehicle can be effectively controlled under the condition that the aerodynamic performance and the structure of the unmanned aerial vehicle are not influenced. And the integration level and the stability of the unmanned aerial vehicle electromagnetic system are improved.

The application relates to the technical field of electric control elements, in particular to a miniaturized high-protection DC contactor, so as to solve the problems that the process operation is complicated, time-consuming and large in space ratio when silicon rubber is generally used for internal filling of the traditional DC contactor, and finally the maintenance convenience of the internal filling structure of the DC contactor is poor and the overall application efficiency is low. The cover plate of the DC contactor is clamped with the base assembly through self-back dowel, the electromagnetic system drives the contact bridge mechanism to contact or separate from the static contact of the base assembly, the traditional screw column type base packaging structure is replaced, the space utilization rate in the shell is significantly improved by combining the up-down displacement of the contact bridge mechanism, the structural height is effectively reduced while the structural strength and sealing performance are ensured, the product miniaturization is ensured, the silicon rubber filling process is replaced by a sealing gasket, the assembly process is simplified, and the composite connection of the combined nail and rivet further guarantees the mechanical stability and sealing reliability of the overall structure.

The utility model relates to an electromagnetic system of a contactor, which comprises a shell, and a moving contact assembly, a static iron core, a coil framework, a travel switch and an electronic control unit are arranged in the shell. According to the utility model, the moving contact assembly, the static iron core, the coil framework, the travel switch and other parts are integrated in the shell, the compactness of the whole structure is realized, and the design of the coil framework enables one end of the coil framework to extend into the static iron core to be matched with the structure of the static iron core and the other end of the coil framework to extend outwards to install the travel switch, so that the space is saved; the arrangement of all the components is more reasonable, the space utilization rate is improved, the air gap groove formed in the static iron core is used for containing the working air gap, the size and position of the working air gap can be controlled, it is ensured that the electromagnetic system can generate stable and predictable magnetic field force during working, then the moving contact assembly is driven to act accurately, and the service life of the electromagnetic system is prolonged. And the electromagnetic system realizes a remarkable energy-saving effect by optimizing the processes of magnetic field generation and action execution.

The electromagnetic system capable of improving the electromagnetic attraction force comprises a magnetic conduction cylinder, a movable iron core and a push rod, and a cavity where the electromagnetic system is located is separated from a cavity where a contact system is located through a yoke plate; one end of the movable iron core penetrates through the magnetic conductive cylinder; one end of the push rod is fixed on the movable iron core, the other end of the push rod penetrates through the yoke plate, and a movable contact of the contact system is arranged on the push rod and can move relative to the push rod; and an elastic piece for sealing a gap between the contact surfaces of the yoke plate and the push rod is arranged on the periphery of the contact surface of the yoke plate and the push rod. The electromagnetic system can be applied to the contactor. The sealing performance of the chamber where the contact system of the contactor is located can be improved through the elastic piece, the gap between the magnetic conductive cylinder and the movable iron core is shortened, and the electromagnetic attraction is improved.

The application relates to the technical field of electrical connection devices, in particular to a contactor and a coil protection accessory. The contactor provided by the application comprises an electromagnetic system and a coil protection component, the electromagnetic system comprises a moving iron core, a static iron core and a coil, and the moving iron core is arranged opposite to the static iron core. The coil is arranged on the static iron core. The coil protection component comprises a first normally closed contact, a second normally closed contact and a time-delay operation structure. Through the cooperation of the first normally closed contact, the second normally closed contact, the time-delay operation structure, the moving iron core and the coil, the coil power supply can be cut off in time under the condition that the moving iron core is attracted abnormally, so that the overheat phenomenon of the coil and the static iron core can be avoided, the coil can be protected from the damage caused by the overheat phenomenon, the coil protection component structure is relatively simple, the cost is relatively low, a relatively high contactor and coil are protected at a relatively low cost, and the fire risk can be reduced.

The utility model belongs to the field of alternating current contactors, and particularly relates to an alternating current contactor, which comprises a shell, an electromagnetic system, a contact frame, a movable contact bridge, a contact spring and a static contact, the contact frame is provided with a mounting hole for the movable contact bridge to pass through, and two guide bumps are arranged on two sides, corresponding to the middle of the movable contact bridge, in the mounting hole. Two sides of the contact spring are provided with two guide projections, two sides of the movable contact bridge are provided with four guide sheets which are distributed on two sides of the two guide projections, and the four guide sheets move along with the movable contact bridge and slide on two sides of the two guide projections in a reciprocating manner, so that the four guide sheets of the movable contact bridge can be driven by elastic force of the contact spring to slide along two sides of the two guide projections in a reciprocating manner. Stable and reliable contact between the moving contact bridge and the static contact can be ensured, the contact reliability is higher, and the service life of the contact can be prolonged.

A control circuit and a direct current contactor, the control circuit comprises an action loop and a main control circuit, the connection and disconnection of the action loop are controlled by a switching tube, so that a coil of a direct current electromagnetic system connected to the action loop is connected or disconnected, the main control circuit is connected with a driving circuit, and the driving circuit controls the connection and disconnection of the switching tube. The system further comprises a voltage sampling circuit and a current sampling circuit, the voltage sampling circuit is connected between the main control circuit and the action loop and used for collecting voltage signals of the coil, the current sampling circuit is connected between the main control circuit and the action loop and used for collecting current signals flowing through the coil, and the main control circuit is connected with a feedback unit. The feedback unit is used for feeding back operation states of the coil and the contact mechanism. According to the utility model, the main control circuit obtains the working current and the working voltage of the coil and the operation state data of the coil in real time, and then feeds back the operation states of the coil and the contact mechanism through the feedback unit, so that when a fault occurs, the fault can be quickly and accurately eliminated.

The invention belongs to the technical field of low-voltage electric appliances, and particularly discloses an electromagnetic system and a contactor. According to the electromagnetic system provided by the invention, the static iron core assembly comprises a plurality of coil windings, and the magnetic attraction force between the movable iron core and the static iron core assembly is improved, so that the movement stroke of the movable iron core is improved; the magnetic flux of the magnetic piece can be conducted through the first magnetic conducting piece and the second magnetic conducting piece, the magnetic piece and the static iron core assembly form a magnetic field to generate first magnetic field force, the second magnetic conducting piece is arranged around the static iron core assembly, the first magnetic field force is improved, the contactor has large initial counter force, and therefore the requirement of the contactor with the large total range is met; when the static iron core assembly and the movable iron core generate the second magnetic field force, the static iron core assembly can also generate the third magnetic field force opposite to the first magnetic field force, the third magnetic field force can offset the first magnetic field force, when the static iron core assembly adsorbs the movable iron core, only small reset force needs to be overcome, and therefore the movement stroke of the movable iron core is further increased.