30results about How to "Increase magnetic induction" patented technology

The invention provides a loudspeaker and electronic equipment. The loudspeaker comprises a first magnet, a second magnet, a vibrating diaphragm, a voice coil and a first upper magnetizer. The first magnet is located on the inner side of the second magnet. The vibrating diaphragm, the first magnet and the second magnet are oppositely arranged at intervals. The voice coil is fixed on the surface of the diaphragm facing the first magnet. The voice coil, the first magnet and the second magnet are arranged at intervals, and the projection of the voice coil in the first direction is overlapped with part of the first magnet and / or part of the second magnet. The first direction is the thickness direction of the loudspeaker. The first upper magnetizer is fixed on the surface, facing the vibrating diaphragm, of the first magnet. The first upper magnetizer, the vibrating diaphragm and the voice coil are arranged at intervals, and the first upper magnetizer is partially located on the inner side of the voice coil. According to the loudspeaker, the first upper magnetizer is arranged on the inner side of the voice coil to converge the magnetic induction lines in the magnetic fields generated by the first magnet and the second magnet to the voice coil position, so that the magnetic induction intensity at the voice coil position is enhanced, the efficiency of the loudspeaker is improved, and the high-pitch effect of the loudspeaker is improved.

The invention provides a high-magnetic-induction-intensity non-oriented silicon steel thin strip for an automobile driving motor and a manufacturing method of the high-magnetic-induction-intensity non-oriented silicon steel thin strip, and belongs to the technical field of electrical steel manufacturing. (2) carrying out smelting and RH vacuum treatment according to the components; (3) carrying out normalizing pickling treatment on a hot-rolled coil in a pure nitrogen protective atmosphere; (4) rolling into a cold-rolled coil with the thickness of 0.10-0.30 mm by adopting a secondary cold rolling method; (5) recrystallization annealing is conducted at the temperature of 950-1050 DEG C in the H2 atmosphere (the ratio of H2 to N2 is larger than 1.2: 1), and (6) annealing is conducted on an annealed coil in a bell-type furnace, total magnetic field annealing is increased, the magnetic field intensity is 1.5 T, the annealing temperature is 760 DEG C, cooling is conducted after heat preservation is conducted for 1.5 h, and the non-oriented silicon steel thin strip with the medium-frequency iron loss P1.0 / 400 being 6-12 W / kg, the magnetic induction B5000 being 1.69-1.73 T, the yield strength Rp0.2 being 450-520 Mpa and the excellent performance is obtained. The steel grade developed by the invention can simultaneously meet the non-oriented silicon steel thin strip for the automobile driving motor, which has extremely high requirements on medium-frequency iron loss, magnetic induction and strength and extremely excellent comprehensive performance.

The utility model provides an intelligent damper based on laminated MRE and a damping base. The intelligent damper based on the laminated MRE comprises an outer sleeve and an inner sleeve which can move relatively, the outer sleeve comprises a first sleeve body and a second sleeve body, the inner sleeve comprises a third sleeve body, the end of the third sleeve body is inserted into an annular cavity formed by the first sleeve body and the second sleeve body, and the head of the second sleeve body is connected with the bottom wall of the third sleeve body through an elastic piece. A first annular cavity is formed between the first sleeve and the third sleeve, a second annular cavity is formed between the third sleeve and the second sleeve, a plurality of laminated MRE units are arranged in the circumferential direction of the first annular cavity and the circumferential direction of the second annular cavity at intervals, and each laminated MRE unit is correspondingly sleeved with an enameled coil. According to the intelligent damper, the coil is directly wound around the MRE, and under the same MRE effect, the current needing to be connected can be reduced, so that the calorific value is reduced, and the intelligent damper is safer and more suitable for continuous power-on work.

The invention provides a double-magnetic-source magnetofluid sealing device and a cooling control system and method.The double-magnetic-source magnetofluid sealing device comprises a shell, a rotating shaft is rotationally installed in the shell through a bearing, an inner pole shoe, a permanent magnet sleeve and an inner permanent magnet are installed on the rotating shaft, and the bearing and the inner pole shoe are axially limited through the sleeve; an outer pole shoe and an outer permanent magnet are mounted in the shell through radial positioning; the shell is provided with a water inlet, the water inlet is communicated with a cooling water path in the shell, and an outlet of the cooling water path is connected with the water outlet; the shell is provided with a plurality of magnetofluid supplementing ports used for supplementing magnetofluid, and the magnetofluid supplementing ports are communicated with the tooth groove holes in the pole shoes. And the magnetic fluid supplementing port is also used as a temperature measuring port for measuring temperature. By additionally arranging the inner pole shoes and the inner permanent magnets on the shaft, the magnetic gathering performance of the pole shoes is greatly enhanced, the magnetic leakage of the device is reduced, and the magnetomotive force of a magnetic loop is enhanced, so that the magnetic induction intensity of a sealing gap is improved, and the pressure resistance of the device is improved.

The utility model discloses a PEEP valve for a breathing machine and an anaesthesia machine. The PEEP valve comprises a thrust driving assembly and an air path assembly. The thrust driving assembly comprises an upper cover, a second printed circuit board, a coil support, a coil, an inner magnet yoke, an outer magnet yoke, a permanent magnet, a first printed circuit board, a flexible circuit board and a push rod. The inner magnet yoke and the permanent magnet are located in the outer magnet yoke and are coaxial; the coil is wound on the outer ring of the coil bracket; the push rod is fixed in the center of the coil bracket; the coil support is located on the inner magnet yoke, the push rod penetrates through the permanent magnet and a center hole of the inner magnet yoke, the two ends of the flexible circuit board are connected with the first printed circuit board and the second printed circuit board respectively, the first printed circuit board is fixed to the coil support, and the second printed circuit board is fixedly connected to the upper cover. The top of the push rod penetrates through the center through hole of the upper cover and is in clearance fit with the center through hole. The permanent magnet synchronous motor is high in efficiency, long in service life, strong in manufacturability and high in thrust linearity.

The invention discloses a double-end grounding loop resistance tester and method, and the tester comprises a current source loop which is composed of a to-be-tested resistor loop and a DC constant current source module, is connected with the two ends of the to-be-tested resistor loop in parallel, and generates voltage drop at the two ends of the to-be-tested resistor loop, the other end of the to-be-measured resistor loop is connected with one end of the voltage sampling circuit and one end of the direct current sampling circuit; the other end of the voltage sampling circuit and the other end of the direct current sampling circuit are connected with one end of the analog-to-digital conversion circuit; the other end of the analog-digital conversion circuit is connected with one end of the CPU circuit; and the other end of the CPU circuit is respectively connected with the display circuit, the storage circuit, the communication circuit and the key circuit. The current test probe is suitable for a large-diameter switch, the test precision and the operation simplicity can be guaranteed, and the technical problem that the shunt current of a grounding wire is difficult to test under different conditions can be solved.

The invention relates to the technical field of oriented silicon steel cold rolling production, in particular to a cold continuous rolling method and equipment for efficiently producing low-temperature high-magnetic-induction oriented silicon steel. According to the method, efficient and stable production of the thin-gauge low-temperature high-magnetic-induction oriented silicon steel can be achieved, and meanwhile the excellent plate shape and the high-magnetic-induction performance are guaranteed; through cooperative control of targeted roll shape design and process parameters, the problems of edge drop and convexity of the steel strip can be accurately regulated and controlled, the strip shape defect easily occurring in the rolling process of the thin-gauge steel strip is effectively avoided, the finished steel strip has excellent straightness, and the rolling quality of the thin-gauge steel strip is improved. A good foundation is provided for smooth proceeding of subsequent procedures and stacking use of final products; meanwhile, by optimizing texture orientation control in the cold rolling process and combining with an efficient inhibitor formed through subsequent nitriding treatment, the magnetic induction intensity of the finished low-temperature high-magnetic-induction oriented silicon steel is remarkably improved, meanwhile, iron loss is reduced, the magnetic performance of the product is more excellent, and the use requirement of power equipment for efficient soft magnetic materials can be better met.

The invention discloses a preparation method of an amorphous iron core, and belongs to the technical field of amorphous iron cores. The invention discloses a preparation method of an amorphous iron core, which comprises the following preparation steps: (1) winding an iron-based amorphous alloy strip to obtain an amorphous iron core blank; (2) carrying out pre-annealing treatment on the amorphous iron core blank; (3) winding copper strips inside and outside the amorphous iron core blank subjected to pre-annealing treatment, and performing secondary annealing treatment; and (4) putting the amorphous iron core blank subjected to secondary annealing treatment into an insulating adhesive for vacuum impregnation, taking out the amorphous iron core blank, and putting the amorphous iron core blank into a drying oven for drying to obtain the amorphous iron core.

The invention relates to the technical field of nursing instruments in the rehabilitation medicine department, and discloses a body position auxiliary placing pad for spinal cord injury rehabilitation medicine nursing, lower connecting clamping blocks are fixedly connected to the two sides of the lower surface of a bearing pad, a bearing air bag is embedded in the bearing pad, and a headrest is slidably connected to the front end of the upper surface of the bearing pad; a back cushion is slidably connected to the middle of the upper surface of the bearing cushion, and side limiting cushions are slidably connected to the positions, located on the two sides of the back cushion, of the upper surface of the bearing cushion. When the headrest and the back cushion are pressed downwards, the middle position of the pressed bearing air bag is sunken downwards, air moves towards the two sides of the bearing air bag, then side limiting cushions on the two sides are pushed upwards to ascend, the two sides of a patient are limited, meanwhile, a lower triggering plate moves downwards, a driven groove is driven through an inclined pressing plate, and then a driven transverse plate is driven to move towards the inner side; and then the side neck pillows on the two sides are driven to move synchronously, and the neck of the patient is protected.

The application discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic energy conversion, wherein the sound production device comprises a magnetic circuit system, a shell, a mesh cloth and a vibration system; the magnetic circuit system comprises a magnetic yoke, a center magnetic circuit arranged on the magnetic yoke and a side magnetic circuit; the side magnetic circuit comprises two side magnets; the magnetic yoke comprises a bottom plate and two side plates connected with the bottom plate; the side magnetic circuit and the side plates are arranged around the periphery of the center magnetic circuit and are spaced apart from the center magnetic circuit to form a magnetic gap; the shell is provided with a communication hole; the mesh cloth covers the communication hole; the mesh cloth and the side plates are spaced apart to form an air flow channel; the air flow channel is connected with an external environment and a cavity on the inner side of the side plate through the mesh cloth; and the vibration system comprises a diaphragm and a voice coil, and the voice coil is arranged corresponding to the magnetic gap. The mesh cloth and the shell are integrally injection molded to realize complete filling; on this basis, the two side plates and the center magnetic circuit form a magnetic loop, the magnetic induction intensity of the magnetic gap is improved, and the acoustic performance of the sound production device is improved.

The utility model provides an intelligent terminal compatible with wall hanging and desktop use, which relates to the technical field of display equipment assembly and comprises a terminal body and an on-hook plate, and the terminal body comprises a rear cover and a support plate rotatably connected with the rear cover. The rear cover is provided with an installation cavity forming a protruding part, one end of the hinge is embedded in the installation cavity, and the other end of the hinge is connected with the supporting plate and used for supporting the terminal body when the table top is used. And the rear cover is provided with a power supply interface, and the power supply interface sequentially penetrates through the supporting plate and the on-hook plate to be connected to a wall junction box. A positioning part is arranged on the rear cover, a magnetic sheet is embedded in the rear cover, a positioning protrusion made of magnetic conductive materials is arranged on the hanging plate, and stable positioning is achieved through magnetic attraction. The whole structure is compact, assembling and switching operations are simple and fast, the number of extra assemblies is reduced, the manufacturing cost is reduced, and the user experience is improved.

The invention relates to a design method of an ultra-low field magnetic resonance imaging elliptic cylinder type magnet structure, and belongs to the technical field of medical electromagnetic detection. According to the method, a shape-dependent method or a virtual magnet method is adopted to design a magnet structure, a magnet is rotated in a gear transmission mode, and a large gear on the magnet is tightly matched with a small gear driven by a motor to realize rotation phase control, so that sliding of the magnet when the magnet starts to rotate and stops rotating during friction force transmission can be overcome; therefore, high-resolution two-dimensional radio frequency phase coding imaging is realized. The magnet design method is novel, the design difficulty of the lightweight magnet can be reduced, the high uniformity of the main magnetic field of the magnet is ensured, a gradient coil system is not needed, two-dimensional radio frequency phase coding imaging is realized by rotating the magnet, and the complexity of equipment is reduced.

The invention relates to the technical field of polishing equipment, and discloses a magnetic field array polishing device which comprises an array carrier, a rotating shaft and an outer sleeve. Two rows of edge magnet sets and a row of middle magnet sets are arranged on the side face of the array carrier, one end of the rotating shaft is inserted into the bottom of the array carrier, the other end of the rotating shaft extends out of the array carrier, the rotating shaft is externally connected with an output source to drive the array carrier to rotate, and the outer sleeve is arranged on the outer side of the array carrier in a sleeving mode. According to the polishing device, each N-pole outward magnetic field is in an obvious brush shape, the N-pole brush-shaped magnetic fields are distributed in a continuous S-like shape from the side face of an array carrier, and when an array rotates by a circle, the number of times and the strength that all positions of any 30 mm long line segment outside the carrier parallel to the axial direction of the array carrier are scratched by a magnet are consistent; and therefore, magnetorheological polishing is more uniform and sufficient, and the efficiency and capacity of magnetorheological polishing are improved.

The present invention relates to the technical field of flat ring high gradient magnetic separation equipment, and in particular to a composite magnetic system for a flat ring high gradient magnetic separator. It comprises a plurality of permanent magnetic poles and electromagnetic magnetic poles distributed in the circumferential direction; the number of the permanent magnetic poles and the electromagnetic magnetic poles is an even number, the permanent magnetic poles and the electromagnetic magnetic poles have the same circumferential position and are opposite to each other, the one-to-one opposite permanent magnetic poles and the electromagnetic magnetic poles have the same polarity, the two adjacent permanent magnetic poles have opposite polarity, and the two adjacent electromagnetic magnetic poles have opposite polarity; a cylinder that can rotate around its own axis is arranged outside the permanent magnetic pole, and the magnetic medium is fixed in the circumferential direction of the cylinder and rotates with the cylinder. The present invention combines the permanent magnetic system and the electromagnetic magnetic system, which fully utilizes the advantages of the permanent magnetic system with low energy consumption and large unit processing capacity of the flat ring high gradient magnetic separator, and overcomes the disadvantages of the low background magnetic induction intensity and difficulty in adjustment generated by the permanent magnetic system, which can effectively reduce the problem of high energy consumption of high gradient magnetic separation technology.

The utility model relates to the technical field of automobile sensors, in particular to an installation structure of a seat position sensor, which comprises a guide rail, a slide rail and the seat position sensor installed at one end of the slide rail, a guide rail opening is arranged on one side face of the guide rail, and two edges of the guide rail opening are respectively folded inwards to form inwards-buckled flanges. A sliding rail opening opposite to the guide rail opening is formed in one side face of the sliding rail, the two edges of the sliding rail opening are turned outwards to form outer turned edges in lap joint with the turned edges respectively, one end of the sliding rail is connected with a fixing clamp, and the fixing clamp is connected with the seat position sensor. The seat position sensor is installed at one end of the sliding rail through the fixing clamp and moves along with the sliding rail, the fixing clamp and the sliding rail are connected in a pluggable mode, installation is easy and convenient, and the fixing clamp and the seat position sensor are connected in a pluggable and bolt fixing mode rapidly and effectively. And a transverse Z-shaped metal sheet is additionally arranged on the guide rail, so that the change of the magnetic induction intensity is further enhanced.

The utility model belongs to the technical field of electronic components, concretely relates to a chip transformer, including magnetic core, cladding layer and electrode, wherein, magnetic core includes I -shaped magnetic core and chip magnetic core, the cladding layer is in I -shaped structure and is cladded in the outside of I -shaped magnetic core, and the cladding layer is set up in open -mouthed type near chip magnetic core side, the cladding layer end portion is provided with a plurality of electrodes away from chip magnetic core side, the both ends of I -shaped magnetic core with the chip magnetic core between be provided with air gap structure, the air gap structure includes first air gap spacer close to the end of I -shaped magnetic core, second air gap spacer close to chip magnetic core and the magnetic sheet setting between first air gap spacer and second air gap spacer.

The utility model relates to the technical field of loudspeaker, the utility model discloses a double hua si magnetic circuit system, including T iron, the magnetic steel of T iron outside setting and the hua si subassembly of T iron outside setting and located the upper end of magnetic steel, the gap groove is formed between magnetic steel and hua si subassembly and T iron, voice coil is located in the gap groove, the inside ring of hua si subassembly is equipped with the installation groove, the short circuit ring is inlayed in the installation groove, the inner wall of short circuit ring is flush with the inner wall of hua si subassembly. This technical scheme can increase the magnetic induction intensity and reduce the loudspeaker distortion under the condition of guaranteeing the invariable magnetic gap width by setting the short circuit ring in the hua si subassembly, the double hua si structure of this technical scheme is superimposed, can increase the magnetic conductivity cross -section area, guarantee the center position of short circuit ring in the volume of voice coil, so that when the magnetic circuit saturation magnetization, the wide magnetic field area will be produced on two hua si, and voice coil moves completely in the magnetic field, reduces the distortion.

The invention discloses a motor rotor and a motor applying the same, and relates to the technical field of motors, the motor rotor comprises an annular magnet yoke and magnetic steel, the magnetic steel is arranged on one side, close to a motor stator, of the magnet yoke, the magnet yoke comprises a plurality of magnetic pole groups, and the plurality of magnetic pole groups are arranged according to a Halbach array; the magnetic field intensity of an air gap area between the motor rotor and the motor stator is enhanced; the magnetic pole groups are used for replacing silicon steel sheets, so that an iron core part is omitted, the occupied space is reduced, the structural compactness of the rotor is improved, the magnetic induction intensity is increased, the magnetic field energy density is improved, the motor can output higher power under the same volume, and the motor is suitable for high-power-density application scenes; in addition, the magnetic pole sets are arranged in a Halbach array mode, magnetic flux is effectively concentrated, magnetic induction intensity in air gaps is improved, interference of reverse magnetic flux is reduced, the motor can utilize a magnetic field more efficiently in the operation process, output power is improved, meanwhile, loss of the motor is reduced, and therefore the overall performance and efficiency are improved.

This invention relates to a method for improving the texture orientation and processing properties of Fe-6.5%Si steel, belonging to the field of material modification technology. It includes composition adjustment, determining the normalization temperature range and cooling medium, cold rolling and annealing treatments, calculating the lattice slip energy of the cold-rolled non-oriented steel sheet, electrical pulse modification, and temperature control. This invention alters the magnetic and deformation properties of Fe-6.5%Si alloys through the addition of alloying elements and pulsed current treatment, resulting in low-iron-loss, low-noise, high-silicon electrical steel for power transformers that can be produced using rolling processes. The silicon steel sheets prepared using this invention have been validated in engineering applications. Third-party testing has shown that their performance indicators meet the requirements for silicon steel sheets used in transformers, demonstrating strong engineering practicality and enabling actual industrial production.

The utility model relates to the technical field of magnetic field combination devices, in particular to a special-shaped magnetic field combination device for enhancing the magnetic induction intensity of an alternating magnetic field by using externally-attached permanent magnets, a magnetic force assembly comprises a plurality of permanent magnets, and the permanent magnets are used for enhancing the magnetic induction intensity B of the alternating magnetic field generated by the special-shaped magnetic field combination device. The permanent magnets are used for bonding magnetizer components of the device, so that the alternating magnetic field is changed into a special-shaped magnetic field; the constraint sheet and the transition sheet are fixed on the magnetic core through the adsorption force of the permanent magnet, and no binder is used for bonding, so that the magnetic resistance loss caused by the use of the binder is eliminated; due to the fact that the permanent magnet is additionally arranged, the magnetic induction intensity B of an alternating magnetic field formed by the device is improved, after the magnetic induction intensity B is improved, output of alternating current can be correspondingly reduced, and therefore the purpose of saving electric energy is achieved.

The present invention discloses a device and method for providing a high-stable magnetic flux change rate, comprising a placement table, a magnetic assembly is fixed on the top surface of which, the magnetic assembly consists of a first magnet group, a second magnet group and a guide magnet, the first magnet group is formed by bonding a plurality of first magnets with N levels facing upwards in sequence along a first horizontal direction, the second magnet group is formed by bonding a plurality of second magnets with S levels facing upwards in sequence along the first horizontal direction, the first magnet group and the second magnet group are arranged side by side and spaced apart along the second horizontal direction, the second horizontal direction is perpendicular to the first horizontal direction, the guide magnet is bonded between the first magnet group and the second magnet group and is located at the center of the magnetic assembly, with the N level facing the first magnet group and the S level facing the second magnet group, the placement table is connected to a rotating mechanism, the rotating mechanism is used to drive the placement table to drive the magnetic assembly to rotate horizontally around the axis, the central axis of the magnetic assembly coincides with the rotation axis of the placement table, and can provide a magnetic field with a stable magnetic flux change rate when the magnetic assembly rotates horizontally.

This invention belongs to the field of marine engineering and structural vibration control technology, and discloses a ball-bearing supported bidirectional active-passive tuned mass damper, which is composed of two arc-shaped tuned mass dampers with perpendicular motion directions. The inertial mass is supported on an arc-shaped base by a ball bearing assembly, cleverly converting sliding friction into low-resistance rolling friction, making the damper more sensitive to start, while maintaining a compact structure. In terms of passive control, the device dissipates energy through electromagnetic damping generated by the relative motion between the magnet assembly and the conductor plate. The integrated active control system, composed of a drive coil and a magnet assembly, can apply additional active control force to the TMD, thereby upgrading the traditional passive TMD to a higher-performance active-passive hybrid system, enhancing its adaptability and robustness to complex loads. In addition, the device adopts a non-contact electromagnetic guidance design, utilizing a figure-eight coil assembly in conjunction with a lateral magnet assembly to eliminate the friction of traditional mechanical guidance mechanisms.

The invention discloses a multi-acupoint synergistic excitation tinnitus treatment coil based on an auricle conformal composite loop. The coil comprises an auricle conformal composite loop adaptive to the auricle root contour and a plurality of acupoint collaborative excitation coils nested on the auricle conformal composite loop. The auricle conformal composite loop adopts a composite structure formed by combining a straight line section and an arc section, so that tight conformity with ear anatomical characteristics is realized; during working, cooperative excitation is formed through reverse configuration of currents of the main coil and the auxiliary coil, and a focusing electric field with enhanced vector superposition is generated at acupuncture points such as the ear door and the listening uterus. The problems that a traditional coil is poor in fitting degree and poor in focusing performance are effectively solved, and non-invasive efficient and accurate treatment is achieved.

This application discloses a complete production method for ultra-thin high-grade non-oriented silicon steel and its acid continuous rolling combined with 20-roll precision cold rolling. The thickness of the non-oriented silicon steel is (0.05~0.15)±0.002mm. The production method includes: heating: homogenization temperature 1000~1140℃; hot rolling: the initial rolling temperature of the first finishing rolling pass ≥950℃, the final rolling temperature of the last finishing rolling pass 850±15℃, and the hot-rolled plate thickness 1.80~2.30mm; coiling temperature 630±15℃; pickling and continuous cold rolling: pickling and multi-pass continuous cold rolling are performed using a multi-stand pickling and continuous cold rolling mill, and the hardened plate thickness is 0.2~0.35mm; normalizing the hardened plate: normalizing the hardened plate in a normalizing furnace to obtain a normalized hardened plate; normalizing temperature 850~950℃; 20-roll cold finishing; annealing: annealing temperature 900~1000℃, annealing time 40~120s.

The utility model relates to an electromagnetic valve, including casing, the coil former with core body placement hole who arranges in the casing and with casing fixed connection, the first core body and the second core body who arranges in core body placement hole, one of first core body and second core body is fixedly connected with casing, first core body and second core body respectively have the first end face and the second end face that can mutually shape cooperation, the second core body is equipped with the guide hole that extends from the second end face and removes the first end face along the axial direction, first core body has the guide protruding portion that protrudes from the first end face and can be guided to move to the guide hole. This design assembly is simpler, is favorable to reduce the complexity of manufacturing process, improves assembly efficiency, reduces cost, and in the assembly process is not easy to introduce the impurity or the deformation, improves the service life of electromagnetic valve.

The application discloses a kind of plasma source assembly and semiconductor process chamber, belong to the field of semiconductors.A kind of plasma source assembly, applied to semiconductor process chamber, the plasma source assembly includes: insulating medium pipe, Faraday shield, coil and magnetic conducting piece;The insulating medium pipe is used to communicate with the cavity of the semiconductor process chamber;The coil is wound on the outside of the insulating medium pipe;The magnetic conducting piece is encircled in the outer periphery of the coil.A kind of semiconductor process chamber includes the above-mentioned plasma source assembly.The application can at least solve the problem that high power in coil leads to higher power loss.

An explosion-proof type explosion-proof electromagnetic valve comprises a magnetic conductive shell, an electromagnetic valve body, an electromagnetic valve body and a control device, an installation cavity is formed in the magnetic conductive shell, and the magnetic conductive shell is an electric conductor with magnetism; the driving assembly comprises a coil main body which is arranged in the mounting cavity; the explosion-proof coil is characterized in that the coil main body is wrapped and filled with an explosion-proof layer formed by an insulating heat-resistant material; the coil main body is electrically connected with the magnetic conductive shell, and the magnetic conductive shell is grounded; and the magnetic conductive shell is matched with the height of the coil main body and wraps the coil main body. According to the flame-proof type explosion-proof electromagnetic valve, the coil main body can take the magnetic conductive shell as a dielectric medium to realize grounding, so that the space for arranging a flame-proof shell and a wire holder is saved, and the volume miniaturization arrangement of the flame-proof type explosion-proof electromagnetic valve is facilitated; and meanwhile, the explosion-proof layer in the magnetic conductive shell also enables the explosion-proof capability of the magnetic conductive shell to be stronger, so that the magnetic conductive shell has the functions of explosion suppression and magnetic conduction at the same time, and has the advantage of dual purposes.

The invention relates to a high magnetic induction oriented high silicon steel strip and a preparation method thereof. The preparation method comprises the following steps that raw materials are subjected to smelting, continuous casting and hot rolling, and a hot rolled plate with the thickness being 2-3 mm is obtained; the hot-rolled plate is subjected to cold rolling, decarburization annealing and secondary recrystallization annealing treatment, and an oriented silicon steel strip is obtained; dispersing solid silicon oxide powder in an organic solvent to form slurry, and uniformly coating the surface of the oriented silicon steel strip with the slurry; the coated strip is subjected to siliconizing treatment at the temperature of 100-300 DEG C, the feeding speed is larger than or equal to 0.01 m / min, and the protective atmosphere of siliconizing treatment is a silicon-containing gaseous compound; and carrying out post-treatment on the siliconized high-silicon steel strip to obtain the high-magnetic-induction oriented high-silicon steel strip.

The invention relates to the technical field of permanent magnet vernier motors, and provides a parallel magnetic circuit permanent magnet vernier motor, which comprises a left rotor claw pole, a spoke type permanent magnet, a stator, a stator winding, a middle magnetic ring and a right rotor claw pole, a left rotor claw pole, a middle magnetic ring and a right rotor claw pole are sequentially assembled from left to right to form a rotor, and the rotor is assembled with the stator; the left rotor claw pole and the right rotor claw pole are assembled together, and a cavity for placing a middle magnetic ring is formed between two claw pole discs of the left rotor claw pole and the right rotor claw pole; the spoke type permanent magnets are formed by distributing a plurality of permanent magnets along the circumference in an array mode, and each permanent magnet is connected between the claw poles of the left rotor and the right rotor; the spoke type permanent magnet adopts tangential excitation, and the middle magnetic ring adopts an axial excitation mode; a magnetic flux path of the spoke type permanent magnet and a magnetic flux path of the middle magnetic ring exist in a mutually independent parallel connection mode; through the design of parallel excitation, the magnetic flux of a main magnetic circuit is enhanced, and the torque density and the power factor of the motor are improved.

This application provides an inductor, a power factor correction circuit, and a power supply system. The inductor includes a coil winding and a magnetic core. The magnetic core includes a first outer magnetic core, a second outer magnetic core, and a winding unit. The first outer magnetic core and the second outer magnetic core are disposed opposite to each other in a first direction, the winding unit is disposed between the first outer magnetic core and the second outer magnetic core, and the coil winding is disposed around the winding unit. The winding unit includes a magnetic core middle column and at least two air-gaps distributed in the first direction, and an axis of the magnetic core middle column is parallel to the first direction. The at least two air-gaps include one air air-gap and at least one solid air-gap. A magnetic induction intensity of the solid air-gap is greater than a magnetic induction intensity of the magnetic core middle column. A total air-gap of the inductor may vary with magnitude of a current of the coil winding. When the inductor is used in the power factor correction circuit of the power supply system, an inductance of the inductor of the power supply system can be large in a light load phase, and operating efficiency of the power factor correction circuit can be improved, to optimize efficiency of the power supply system in the light load phase.