84 results about "Saturation (magnetic)" patented technology

The application relates to a nickel-zinc-copper ferrite and a preparation method and application thereof, the nickel-zinc-copper ferrite comprising main components and auxiliary components; the main components comprise Fe2O3 64-66.7 mol%, NiO 9-12 mol%, ZnO 13.5-19 mol% and CuO 3-9.5 mol% with the total mole percentage being 100 mol%; the auxiliary components comprise Bi2O3 0.3-1.5 wt%, Co2O3 0.1-0.6 wt%, CaCO3 0.03-0.08 wt% and ZrO2 less than or equal to 0.1 wt% with the total mass percentage of the main components being taken as a standard. The content of Fe2O3, ZnO, NiO and CuO is controlled, the content of the auxiliary components is matched and adjusted, the prepared nickel-zinc-copper ferrite has high saturation magnetic induction intensity, high magnetic permeability, high Curie temperature, low residual magnetic induction intensity and low specific temperature coefficient, and can be better applied to power inductance or common-mode inductance.

This invention relates to an Fe-Ni based alloy with enhanced soft magnetic properties utilizing a medium-range ordered structure and its preparation method. The chemical formula of the alloy is: Fe bal Ni a Cr y Si b B c M d Cu e X f Its microstructure is as follows: the alloy matrix is ​​mainly amorphous, with dispersed atomic-scale medium-range ordered (MRO) clusters comprising 15%–40% by volume. The size of these clusters is controlled between 1 nm and 5 nm, and no long-range crystalline phases larger than 10 nm are formed. By introducing Ni element to couple magnetic moments with Fe to reduce the saturation magnetostriction coefficient, and by using a low-temperature relaxation annealing process to control the pre-precipitation behavior of Cu element, a high-density MRO-reinforced framework is established in the amorphous matrix. This material possesses high saturation magnetic induction, low coercivity, and excellent high-frequency permeability, which can improve the problems of large magnetostriction coefficients and high high-frequency noise in existing high-Bs iron-based nanocrystalline alloys. It is particularly suitable for high-frequency high-power transformers and wireless charging magnetic shielding modules.

A magnetoresistive stack may include a first electrically conductive material, a fixed region having a fixed magnetic state, a free region configured to have a first magnetic state and a second magnetic state, a dielectric layer disposed between the fixed region and the free region, a spacer region, and a cap layer disposed between the spacer region and the free region. The free region may include a layer of ferromagnetic material, an insertion layer, an iPMA layer, and / or a low saturation magnetization layer.

This invention provides a new energy core based on wide-width amorphous alloy strip and its preparation method, comprising the following steps: winding the amorphous alloy strip based on a tension-wound diameter linear decreasing function to form a single-frame core; splicing multiple single-frame cores along the magnetic circuit direction to form a core body; and annealing the obtained core body under a protective atmosphere to obtain a new energy core. This invention solves the key technical problems of winding, splicing, and annealing of wide-width amorphous alloy strip in the preparation of high-power new energy cores, and realizes the preparation of large-size amorphous alloy cores with low loss, high saturation magnetic induction intensity, and high structural stability.

This application provides a hybrid magnetic circuit and intelligent flux distribution current transformer energy harvesting device and method to solve the problems of low sensitivity for small current energy harvesting and weak resistance to large current saturation in current transformer energy harvesting devices. The device includes a hybrid magnetic circuit unit, a magnetic state detection unit, and an intelligent flux distribution unit. The hybrid magnetic circuit unit includes a first magnetic circuit and a second magnetic circuit connected in parallel and magnetically coupled. An energy harvesting winding and an auxiliary control winding are wound on the first and second magnetic circuits, respectively. The magnetic state detection unit monitors the magnetization state of the first magnetic circuit, and the intelligent flux distribution unit injects controllable current into the auxiliary control winding to adjust the flux ratio flowing through the first and second magnetic circuits. By constructing a parallel hybrid magnetic circuit and implementing active flux distribution, this application ensures that the first magnetic circuit operates in the ideal linear region under any transmission conductor current, thereby simultaneously achieving ultra-high sensitivity for small current energy harvesting and extremely strong resistance to large current saturation.

This invention relates to the field of fluid impurity removal detection technology, and discloses an online detection method and system for the impurity removal efficiency of a fluid iron separator. The method includes: measuring the instantaneous content of magnetic impurities at the inlet and outlet in real time using a high-frequency electromagnetic induction sensor; monitoring the change in magnetic flux on the surface of the magnetic medium in real time using a miniature fluxgate sensor array; calculating the apparent impurity removal efficiency based on the impurity content at the inlet and outlet using an edge computing gateway, and simultaneously calculating the magnetic medium adsorption saturation based on the magnetic flux decay curve; weighting the apparent impurity removal efficiency using the magnetic medium adsorption saturation as a weight for adsorption effectiveness; when the magnetic medium adsorption saturation is lower than a preset saturation threshold, attenuation is performed according to the ratio of the apparent impurity removal efficiency multiplied by the magnetic medium adsorption saturation to the preset saturation threshold to obtain the true impurity removal efficiency. This invention solves the problem in existing technologies that cannot distinguish whether impurities are effectively retained or merely pass through the iron separator, achieving accurate detection of the true impurity removal efficiency.

The application relates to the technical field of magnetocaloric materials, and discloses a low-curie-temperature iron-based magnetocaloric material, a preparation method, a deicing agent and a coating. The magnetocaloric material takes iron as the main body, introduces rare earth elements, transition group elements and metalloid elements to form a synergistic component system, and has the characteristics of adjustable curie temperature and high saturation magnetic induction intensity. The preparation method comprises the following steps: alloy smelting and high-temperature homogenization heat treatment, block pretreatment, segmented parameter control hydrogen crushing, and gradient temperature rising high-vacuum dehydrogenation. Through the hydrogenation process combining low-temperature permeation, high-pressure crushing and heat preservation and refinement, the uniform and controllable crushing of the alloy is realized, and the residual hydrogen content is effectively reduced in the multi-stage dehydrogenation process. The application can significantly improve the problems of serious oxidation, uneven particle size and magnetic performance attenuation existing in the traditional mechanical crushing or conventional hydrogen crushing process. The obtained magnetocaloric material shows high saturation magnetic induction intensity and stable magnetocaloric performance in the low curie temperature interval.

This utility model relates to a magnetic isolation slot that effectively reduces motor torque ripple, belonging to the field of motor technology. It includes a protective housing, within which a rotating shaft extends from both ends of the housing. A stator core, nested and fixedly connected to the housing, is located between the rotating shaft and the housing. A rotor, inserted and connected to the rotating shaft, is located between the rotating shaft and the stator core. The stator core includes a core shaft, and its inner wall has several equally spaced, annularly distributed winding posts integrated with the core shaft. Magnetic isolation slots penetrating the front sides of each winding post are provided. It features a simple structure and good operational performance. The magnetic saturation effect of the magnetic isolation bridge or slots limits magnetic leakage, thereby improving the uniformity of the magnetic field distribution and reducing torque fluctuations. The magnetic isolation slots adjust armature reaction, improving commutation performance and reducing the risk of sparking.

This invention discloses a Cr-rich multiphase hexa-element non-noble metal high-entropy alloy and its preparation method, belonging to the field of magnetic high-entropy alloy technology. Preparation raw materials: Cr 65-70 at.%, Fe 1-5 at.%, Co 1-5 at.%, Ni 1-5 at.%, Al 10-15 at.%, and Mo 10-15 at.%, totaling 100 at.%. Preparation method: (1) Mix the raw materials evenly; (2) Continuously introduce argon gas; (3) Heat at a uniform rate, simultaneously increasing the argon gas flow rate, maintain at 1200℃ for 16 hours, and then reduce the argon gas flow rate; (4) Cool at a uniform rate, simultaneously increasing the argon gas flow rate, maintain at 900℃ for 10 hours, and then reduce the argon gas flow rate; (5) Cool at a uniform rate, maintaining the argon gas flow rate and rapidly cooling to room temperature, thus obtaining the alloy. This invention achieves a high Curie temperature Ti at low cost by combining a precise doping strategy of hexa-element non-noble metal elements with one-step heat treatment and a staged rapid cooling process. c With low saturation magnetization M s The coordinated regulation of these technologies effectively overcomes key bottlenecks such as high magnetic loss and poor magnetic stability in traditional magnetic materials, providing a material basis for the development of next-generation high-frequency and high-temperature magnetic devices.

The application discloses a method and device for determining oil saturation under reservoir conditions and a storage medium, and belongs to the technical field of oil and gas exploration and development. The method comprises the following steps: obtaining target micro-pore structure characteristics of a target well at a target depth, formation pore pressure, nuclear magnetic resonance logging T2 spectrum of the target well and a plurality of core samples; performing a dual-pressure nuclear magnetic joint measurement experiment on each core sample to construct a rock minimum connected pore diameter representation model; determining a rock minimum connected pore diameter according to the target micro-pore structure characteristics based on the rock minimum connected pore diameter representation model; determining a maximum capillary force according to the rock minimum connected pore diameter; determining an oil and gas charging minimum pore diameter according to the formation pore pressure, the maximum capillary force and the rock minimum connected pore diameter; determining a key relaxation time point according to the oil and gas charging minimum pore diameter; and determining the oil saturation according to the key relaxation time point and the nuclear magnetic resonance logging T2 spectrum. The application can improve the characterization accuracy of the oil saturation.

The application discloses a kind of saturation magnetic induction prediction of iron-based amorphous alloy, component design and super-high saturation magnetic induction iron-based amorphous / nanocrystalline alloy. Through machine learning model XGBoost combined with SHAP analysis reveals the core role of ferromagnetic element content, alloy mixing enthalpy and electronegativity difference, while maintaining high ferromagnetic element content, without deteriorating amorphous forming ability, after annealing can obtain very low coercivity, realize high saturation magnetic induction and amorphous forming ability, the synergistic optimization of coercivity. The parameters used in the composition design criteria proposed by the application do not require experimental data and can be calculated directly from the alloy composition. Combined with machine learning model, high-performance components can be quickly screened, significantly reducing the development cycle and cost of traditional trial-and-error method, providing systematic theoretical guidance for the development of high-performance soft magnetic materials and improving industrial feasibility.

The application relates to the technical field of amorphous soft magnetic material preparation, and discloses a cobalt-based amorphous soft magnetic alloy material, a preparation method thereof and application. a Fe b Mo c Si d B e C f M g In the formula, a, b, c, d, e, f and g respectively represent the atomic percentage content of corresponding components; wherein 50<=a<=70, 2<=b<=8, 0.5<=c<=5, 10<=d<=20, 10<=e<=20, 0.01<=f<=0.5, 0.1<=g<=5, and a+b+c+d+e+f+g=100; and M represents at least one of elements V, Cr, Mn and Nb. The cobalt-based amorphous soft magnetic alloy material provided by the application has low saturation magnetic induction intensity, low coercive force, high rectangular ratio and other superior soft magnetic properties, is good in corrosion resistance and easy to prepare; and a magnetic probe prepared from the alloy material has high precision in sensor testing, and has important significance for promoting the development of small high-precision magnetic flux gate current sensors.

This invention discloses a nested ferrite switch based on a composite magnetic circuit, belonging to the field of microwave device technology. It includes a central ferrite rod (1), an insulating dielectric sleeve (2), an excitation coil (3), and a dielectric substrate (5). A coplanar waveguide transmission line (6) is provided on the dielectric substrate (5). The central ferrite rod (1) is embedded in the central junction of the coplanar waveguide. A soft magnetic metal yoke (4) with a magnetic flux density of 2 to 5 times the saturation magnetization of the ferrite is provided outside the central ferrite rod (1). This invention uses a coplanar waveguide and a special magnetic yoke design for the ferrite switch, which can achieve the advantages of high power capacity and wide bandwidth. Through simulation design, the relative bandwidth of the ferrite switch designed with this structure can reach more than 15%.

The application relates to a low-cost high-saturation-flux-density iron-based amorphous nanocrystalline soft magnetic alloy and preparation and application thereof, and aims to solve the technical problems of high cost, difficult consideration of high saturation magnetic induction and low coercivity, and narrow heat treatment process window of existing iron-based nanocrystalline soft magnetic alloys. 82 Si a B b P c Mo 0.5 Cu x , wherein 2.79<=a<=2.87, 12.07<=b<=12.44, 1.39<=c<=1.44, 0.75<=x<=1.25, and a+b+c=17.5-x. The alloy can optimize the soft magnetic performance by adjusting the Cu content and the annealing process. Under the optimal test condition, the saturation magnetic flux density of the typical component alloy can reach 1.82 T, and the coercivity is as low as 1.4 A / m, thereby forming an excellent combination of high magnetic energy storage and low magnetic hysteresis loss, and being suitable for the scene of high magnetic flux and low loss of a soft magnetic device.

A Rogowski coil applied to distribution network traveling wave current acquisition belongs to the field of traveling wave current acquisition equipment. It comprises a ring-shaped winding framework (2), a secondary side coil (3) is wound on the winding framework (2), and a primary side coil (4) is further arranged at the winding framework (2), characterized in that a magnetic core (6) is arranged in the winding framework (2), at least one opening is arranged on the circumference of the magnetic core (6), and the winding angle of the secondary side coil (3) along the circumference of the winding framework (2) is less than 360°. In the Rogowski coil applied to distribution network traveling wave current acquisition, at least one opening is arranged on the circumference of the magnetic core, so that the magnetic core meets the mutual inductance coefficient of the distribution network traveling wave current, and the magnetic saturation during measurement is avoided, meanwhile, the two coil joints of the secondary side coil do not overlap on the surface of the winding framework, which is more helpful to meet the requirement of inter-turn capacitance and further meet the frequency bandwidth during sampling.

The utility model relates to the field of transformer, specifically disclose a kind of iron core stacking structure of reducing transformer loss, including several stacked silicon steel sheet assemblies, from middle to outside, the size of silicon steel sheet assembly presents ladder change, the width and thickness of each group silicon steel sheet assembly are adjusted in the application scheme.'The ladder stacking structure of'middle wide, outside narrow', by matching magnetic flux density distribution, central wide piece controls magnetic flux density below saturation point to reduce hysteresis loss, reduce difficult to utilize edge material, significantly reduce the core loss and material cost.The size design proposed in scheme compared with the result of 'width gradient calculation empirical formula', slightly adjust the thickness of different group silicon steel sheet assembly, noise reduction 2-4dB, hysteresis loss drop 10%.

This application discloses a transformer and a power supply structure for a variable frequency microwave oven. The transformer includes a frame and a magnetic core assembly. The frame has a central hole; the magnetic core assembly is supported by the frame and includes a central magnetic post that passes through the central hole; the saturation magnetic flux density of the magnetic core assembly is greater than 420 millitalas; the diameter of the central magnetic post ranges from 13.5 mm to 15.5 mm; the difference between the diameter of the central hole and the diameter of the central magnetic post ranges from 1 mm to 5 mm. These features enable the miniaturization of the transformer.

The present application relates to the technical field of current transformer, and discloses an anti-interference current transformer with sectional shielding winding of secondary winding, which comprises a closed composite core, a primary winding, a sectional secondary winding assembly, a sectional shielding mechanism and an adaptive current equalization shielding unit. The present application is systematically and cooperatively optimized from four dimensions of magnetic circuit, winding, shielding and grounding. Wide-band magnetic flux conversion and anti-saturation are realized through the radial layered composite core. The winding parameter consistency problem is solved through the sectional winding of the secondary winding and the independent insulation framework. The adjacent winding cross interference is blocked and the parasitic loss is reduced through the sectional Faraday cage shielding. The current unevenness and stray magnetic field are suppressed from the primary side source through the adaptive current equalization shielding unit. Finally, a unified discharge channel is provided for all interference currents through the single-point grounding system, so as to comprehensively improve the measurement accuracy and operation stability of the current transformer in the strong electromagnetic interference environment.

The present application relates to a kind of steel cable magnetic flux leakage flaw detection multimodal signal fusion method and system, steel cable nondestructive testing technical field, for the problem of existing flaw detection equipment to fine diameter steel cable detection ability insufficient, multi-sensor interference is serious and data fusion precision low, the present application is realized by following scheme: using the modular probe based on Halbach permanent magnet array realizes the saturation magnetization to fine to diameter 2mm steel cable;Interference is suppressed using double-ring differential Hall element layout, and leakage flux signal is accurately extracted;The signals of three detection modes of magnetic flux leakage, eddy current and ultrasonic are fused, are collected by FPGA hardware synchronization, and are comprehensively processed by feature level fusion and adaptive weight distribution algorithm, finally by classifier realizes the accurate identification and positioning of defect.The present application effectively improves the detection precision of fine steel cable defect, anti-interference ability and intelligent diagnosis level.

The application belongs to the technical field of electronic information materials, and specifically provides a method for preparing M-type barium ferrite monocrystal thin film under low temperature conditions; the method is characterized by innovative design of liquid phase raw materials and strict design of liquid phase epitaxy process parameters, and can grow the M-type barium ferrite monocrystal thin film with excellent performance on SGGG (111) substrate by liquid phase epitaxy method under low temperature conditions of 830-850 DEG C, which is not only simple in process and low in cost, but also has high crystallization quality, no impurities and defects. The M-type barium ferrite monocrystal thin film prepared by the method is a single crystal material, the film thickness is up to 150 mu m, the saturation magnetization is about 4500 Oe, the remanence is about 1000 Oe, the easy magnetization axis (c axis) is perpendicular to the film surface, has high uniaxial magnetic crystal anisotropy field, and is very beneficial to realize self-bias design of the device.

This invention relates to a current measuring device and a current measuring method, which reduces the influence of magnetic saturation of a magnetic shield and accurately measures the current flowing in a conductor. The current measuring device includes: a magnetic shield having a cutout for capturing the magnetic field generated by the current flowing in the conductor into its internal space; a sensor disposed within the internal space of the magnetic shield and outputting a voltage corresponding to the magnetic field at its location; and a circuit unit that detects the current flowing in the conductor based on the voltage output from the sensor. In this current measuring device, the magnetic shield has a first correction unit, and / or, the magnetic shield or the circuit unit has a second correction unit. The first correction unit corrects for the influence of magnetic flux density saturation of the magnetic shield by the magnetic field measured by the sensor, and the second correction unit corrects the voltage output from the sensor in a manner that reduces the influence of magnetic flux density saturation of the magnetic shield.

The present application relates to a kind of time-domain electric source superconducting electromagnetic detection primary magnetic field compensation method and system, eliminate the influence of primary magnetic field on superconducting sensor observation, improve secondary magnetic field measurement accuracy.First, the primary magnetic field distribution of electric source emission current on ground is calculated, to design secondary field measuring line with primary magnetic field contour line;The compensation current of measuring line is calculated, and compensation transmitter and electric source transmitter are synchronized using GPS, and compensation current is emitted at measuring point to offset primary magnetic field, with the same characteristics of compensation current on the same contour line;By adjusting the load RL parameter of compensation system, the turn-off time of compensation current and electric source emission current is consistent, and the primary magnetic field generated by electric source emission current is completely offset.The present application can solve the problem that superconducting sensor loses lock and magnetic saturation due to the large change rate and range of primary magnetic field in the near-source area of electric source, realize effective observation of superconducting sensor in the near-source area, and expand the measurement area and detection area.

To overcome the problem that existing magnetic shielding materials struggle to balance saturation magnetic induction and loss characteristics, this invention provides a nanocrystalline magnetic permeable sheet, its preparation method, and a spliced ​​magnetic shielding sheet. The nanocrystalline magnetic permeable sheet is composed of Fe. (100‑x‑y‑z‑α‑β‑γ) Co x Cu y M z Si α B β X γ Wherein, M includes one or more of Nb, V, Mo, Ta, W, Zr, Hf, Ti, Cr, Mn, Al, Sc, Y, Zn, and Sn; X includes one or more of C, Ge, P, Ga, Sb, In, and S; 0.1≤x≤10, 0.2≤y≤1.5, 1≤z≤5, 1≤α≤18, 5≤β≤15, 0≤γ≤3, and satisfies 18≤y+z+α+β+γ≤26; the saturation magnetic induction intensity B of the nanocrystalline magnetic permeable sheet is... s The permeability is 1.25~1.75 T; at a test frequency of 128kHz, the real part of the permeability μ' is 100~10000 and the imaginary part of the permeability μ” is 2~7000; at a test frequency of 360kHz, the real part of the permeability μ' is 95~5500 and the imaginary part of the permeability μ” is 2~5800.

This invention discloses a low-temperature sintering NiCuZn ferrite material with high initial permeability and low power loss, and its preparation method. It belongs to the technical field of ferrite material preparation for LTCF inductors, and includes a main component and additives. The main component has the molecular formula Ni. 0.23‑x Cu 0.22+ x Zn 0.55 Fe2O4, x=0.01~0.04; based on the mass of the main component, the additives include: 0.4~0.9 wt% V2O5, 0.1~0.3 wt% Sb2O3. This invention employs a combined V2O5-Sb2O3 additive, whose synergistic effect provides more liquid-phase sintering sites for the liquid-phase sintering process, promotes sintering densification, and improves various magnetic properties of NiCuZn ferrite, achieving comprehensive optimization of permeability, saturation magnetic induction, and power loss at MHz-level frequencies.

This invention discloses an iron-cobalt-based nanocrystalline alloy material and its preparation method, relating to the technical field of soft magnetic alloy materials. The material composition is: (Fe... a Co b ) 73.5‑x Cu c Nb d Si e B f Y x The specific contents of a, b, c, d, e, f, and x are as follows: 0 ≤ x ≤ 5, 0.7 ≤ a ≤ 0.9, 0.1 ≤ b ≤ 0.3, a + b = 1, 0.9 ≤ c ≤ 1.1, 2.8 ≤ d ≤ 3.2, 12.0 ≤ e ≤ 16.0, 8 ≤ f ≤ 10, c + d + e + f = 26.5. This invention provides an iron-cobalt-based nanocrystalline alloy material with higher permeability, higher saturation magnetic induction, and lower coercivity. Furthermore, this material exhibits a higher specific magnetic susceptibility, meeting the requirements of high-power-density devices for material miniaturization and lightweighting.

A coil component includes a first body containing a first magnetic material and a second body disposed on an upper surface of the first body, the second body containing a second magnetic material. An insulating layer is disposed on an upper surface of the second body, and a coil is at least partially disposed in the second body and extends to a surface of the second body. The first magnetic material has a saturation magnetostriction constant that is smaller than the saturation magnetostriction constant of the second magnetic material, thereby reducing magnetostriction in a lower portion of the coil component and suppressing acoustic noise.

A current measurement device (1) includes a magnetic shield (13) having a notch portion (20) for taking a magnetic field generated by a current flowing through a conductor (MC) to be measured into an internal space; a sensor (14) that is disposed in the internal space of the magnetic shield and outputs a voltage corresponding to a magnetic field at a position where the sensor (14) is disposed; and a circuit unit (12) that detects the current flowing through the conductor (MC) to be measured based on the voltage output from the sensor (14), and the magnetic shield (13) includes a first correction unit (A) that corrects the magnetic field measured by the sensor (14) to reduce influence of magnetic flux density saturation of the magnetic shield, and / or magnetic shield (13) or the circuit unit (12) includes a second correction unit (B) that corrects the voltage output from the sensor to reduce the influence of the magnetic flux density saturation of the magnetic shield (13).

The utility model provides a kind of for the multi-source environment power taking device of railway additional line and sensing self-powered system.The multi-source environment power taking device includes flexible band material magnetic core magnetic field power taking module and auxiliary power supply module, and the output end of flexible band material magnetic core magnetic field power taking module is connected with anti-surge module in parallel, and the output end of anti-surge module is connected with magnetic core saturation suppression and filter reactive compensation module in parallel;The output end of magnetic core saturation suppression and filter reactive compensation module is connected with multi-modal rectifier module in parallel, and the output end of multi-modal rectifier module and the output end of auxiliary power supply module are connected with power conversion device.The utility model is by adopting laminated magnetic core and adding insulation film between magnetic core layer and layer to suppress eddy current loss, realize the promotion of magnetic field induction power taking device power taking power;On the basis of magnetic field induction power taking, simultaneously capture the rest field source energy in environment to realize auxiliary power supply, multi-source complement, solve the problem of insufficient energy of magnetic field induction power taking mode under railway additional line current intermittence.

The utility model discloses a kind of efficient brushless hollow cup DC motor stator, including the stator core made of high saturation soft magnetic material, the middle part of the stator core is equipped with core inner hole, the inside of the core inner hole is equipped with cup type winding, and the inside of the core inner hole is attached with insulating film, the cup type winding is by several sheet hexagonal winding column and is rolled by coiling machine, the cup type winding is fixed on the inner wall of core inner hole by high temperature epoxy adhesive layer;The utility model not only guarantees the electrical insulation between stator core and winding cup, but also reduces the inconvenience caused by artificial paste insulating film, improves the quality reliability of stator, shortens manufacturing cycle, improves work efficiency;Relative to filling process, manufacturing cycle is shortened by 2 / 3.

This utility model relates to an electric motor, specifically an electric motor and a compressor. The motor satisfies the following condition: (μ0×hcj / Bm)×100≤N×a×Wt / t≤(μ0×hcj / Bm)×2000; where N is the number of turns in a single stator winding, Wt is the shortest width of the stator teeth, t is the thickness of a single permanent magnet, a is the angle between permanent magnets in the same pole, Bm is the saturation magnetic flux density of the stator material, μ0 is the permeability of free space, and hcj is the intrinsic coercivity of the permanent magnet material. Compared with the prior art, this utility model addresses the deficiency of existing technologies that only reflect the influence of a few structures in the motor on demagnetization resistance. This solution proposes the relationship between the number of coil turns, the shortest width of the teeth, the thickness of the permanent magnet, the angle between the permanent magnets, and the demagnetization resistance. By adjusting the motor structure, the motor's demagnetization resistance can be improved, and the amount of permanent magnets used can be reduced.