All motors run on the principle that interacting magnetic fields in the rotor (the rotating component) and the stator (the stationary component) generate motion. …A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft mounted permanent magnet mechanism and current is induced into the stationary armature. In this work, different analytical methods for calculating the mechanical stresses in the rotors of permanent magnet machines are presented. The focus is on interior permanent magnet machines. First, an overview of eight different methods from the literature is given. Specific differences are pointed out, and a brief summary of the …Permanent magnet motor. Schematic of a permanent magnet motor. A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with the armature for ... A high-speed (HS) permanent magnet (PM) synchronous motor (HSPMSM) with a carbon fiber-reinforced plastic (CFRP) protective sleeve in the surface-mounted rotor was explored in this study.Eddy current losses in magnets are a major consideration in the rotor design of permanent magnet synchronous motors (PMSMs). Stator design choices and the use of modern inverters with high switching frequency introduce harmonics that can contribute to significant losses in the magnets, causing the rotor to heat up. In typical …External rotors of “outrunner” type. Rotors with additional bandage (Polyglas, Kevlar, carbon) Rotors with protecting sleeve. Contact us. Jan Kratochvil ml. +420 607 570 823 [email protected]. We will be happy to cooperate on development and manufacturing of rotors with permanent magnets, please contact our specialist. Leave …This paper is focused on the optimal design, simulation, and experimental testing of a counter-rotating double-rotor axial flux permanent magnet synchronous …This paper overviews high-speed permanent magnet (HSPM) machines, accounting for stator structures, winding configurations, rotor constructions, and parasitic effects. Firstly, single-phase and three-phase PM machines are introduced for high-speed applications. Secondly, for three-phase HSPM machines, applications, advantages, and …Permanent magnet motor. Schematic of a permanent magnet motor. A permanent magnet motor is a type of electric motor that uses permanent magnets for the field excitation and a wound armature. The permanent magnets can either be stationary or rotating; interior or exterior to the armature for a radial flux machine or layered with the armature for ... A permanent magnet synchronous generator is a generator where the excitation field is provided by a permanent magnet instead of a coil. The term synchronous refers here to the fact that the rotor and magnetic field rotate with the same speed, because the magnetic field is generated through a shaft mounted permanent magnet mechanism and current is induced into the stationary armature. Rmr reluctance of the magnet to rotor back iron leakage flux Rmm reluctance of the magnet to magnet leakage flux Rg reluctance of the airgap rb mean radius of stator winding, i.e. (ri + ro)/2 ri inner radius of magnet ro outer radius of magnet Sc area of one conductor cross-section Sp arc length of one coil pitch at the outer radius ro of the ...For high-speed permanent magnet synchronous motor (PMSM), its efficiency is significantly affected by the performance of permanent magnets (PMs), and the phenomenon of demagnetization will occur with the increase of PM temperature. So, the temperature detection of PMs in rotor is very necessary for the safe operation of PMSM, …Measure Skewing Angle. MagScope software makes it easier than ever to measure the skewing angle of skewed permanent magnet rotors, enabling the detection of skewing angle deviations. The right figure shows an example of the step skew on an IPM (Interior Permanent Magnet) rotor, represented in a cross-section graph with automatic zero-crossing ... More specifically, the rotor itself contains permanent magnets, which are either surface-mounted to the rotor lamination stack or embedded within the rotor …This paper overviews high-speed permanent magnet (HSPM) machines, accounting for stator structures, winding configurations, rotor constructions, and parasitic effects. Firstly, single-phase and three-phase PM machines are introduced for high-speed applications. Secondly, for three-phase HSPM machines, applications, advantages, and …where Φ is the magnet flux crossing the air gap, R is the total reluctance through the flux paths and θ is the rotor angle. It is clear that if the reluctance R does not vary as the rotor rotates, then the cogging torque T cog is zero. From this point of view, the cogging torque can be improved by changing the V-shape rotor structure variables …Aug 17, 2022 · For high-speed permanent magnet machines (HSPMMs), two different rotor structures are widely used: surface-mounted permanent magnet (SPM) and interior permanent magnet (IPM). The two different rotor structures have a large impact on the comprehensive performance in multiple physical fields of HSPMMs, including mechanical stress, electromagnetic characteristics, and temperature distribution ... This paper is focused on the optimal design, simulation, and experimental testing of a counter-rotating double-rotor axial flux permanent magnet synchronous generator (CRDR-AFPMSG) for wind turbine applications. For the optimal design of the CRDR-AFPMSG, the particle swarm optimization algorithm to maximize efficiency and …Apr 8, 2022 · This paper proposes two structures of dual-stator permanent-magnet vernier machines (VMs) for high-torque low-speed applications. The proposed structures consist of dual-sided rotor which is sandwiched by inner and outer stators. These topologies include 22 and 46 consequent-pole magnets in the rotor and 24 and 48 stator slots for Design A and Design B, respectively. Design A is an improved ... Since the pole arc coefficient of the rotor permanent magnet is 0.5, according to Ref. 28, the magnetomotive force generated by the permanent magnet is equal to that generated by the adjacent FMP.Brushless DC electric motor. The motor from a 3.5 in floppy disk drive. The coils, arranged radially, are made from copper wire coated with blue insulation. The rotor (upper right) has been removed and turned upside-down. The grey ring inside its cup is a permanent magnet. This particular motor is an outrunner, with the stator inside the rotor. 2.1 Selection of Solution Variants for Analysis. In this study, an analysis of the selection of the number of stator slots to the number of magnetic poles was carried out for the structure of the Permanent Magnet Synchronous Motor (PMSM) with an external rotor, with surface mounted magnets (SPM) with a double-layer, concentrated winding …Permanent Magnet Motors - External Rotor. The W series external-rotor permanent magnet motor combines the high strength alloy material with the patented one-piece fan …Aug 17, 2022 · For high-speed permanent magnet machines (HSPMMs), two different rotor structures are widely used: surface-mounted permanent magnet (SPM) and interior permanent magnet (IPM). The two different rotor structures have a large impact on the comprehensive performance in multiple physical fields of HSPMMs, including mechanical stress, electromagnetic characteristics, and temperature distribution ... External rotors of “outrunner” type. Rotors with additional bandage (Polyglas, Kevlar, carbon) Rotors with protecting sleeve. Contact us. Jan Kratochvil ml. +420 607 570 823 [email protected]. We will be happy to cooperate on development and manufacturing of rotors with permanent magnets, please contact our specialist. Leave …For the high-frequency permanent magnet electrical machine, a reasonable mechanical aspect design is crucial to meet its stability and reliability. This study focuses on the accurate modelling and analysis of the natural frequencies and modes of the rotor assembly for a designed and manufactured 100 kW 32,000 r/min motor.Permanent-magnet motors can be designed to operate at synchronous speed from a supply of constant voltage and frequency. The magnets are embedded in the rotor iron, and a damper winding is placed in slots in the rotor surface to provide starting capability. Such a motor does not, however, have means of controlling the stator power factor. This paper proposes a new structure of the dual-rotor hybrid-excited axial-flux permanent magnet vernier machine (DR-HEAFPMVM) with the modular stator and the consequent-pole PM (CPM) rotor for low-speed, high torque density applications such as in-wheel electric vehicles. The tooth-wound non-overlapping armature windings and direct …Axial flux permanent magnet synchronous motors (AFPMSMs) have been widely used in wind-power generation, electric vehicles, aircraft, and other renewable-energy applications owing to their high power density, operating efficiency, and integrability. To facilitate comprehensive research on AFPMSM, this article reviews the developments in …When considering the mechanical design of these rotors, SPM rotors allow higher rotational speeds than IPM rotors and will be the focus of this article. The …The eccentricity of the rotor influences the gap permeance, the operating point of the rotor magnets, the gap magnetic flux density distribution, and therefore the electromagnetic force and its spectral distribution. In this paper, the NVH response for dynamic and static eccentricities based on the radial magnetic force harmonics is …Mar 25, 2021 · Compared with other types of electrical machines, permanent magnet synchronous machines (PMSM) have high torque density, high power density, small losses, simple structure for the rotor, and then ... Synchronous motor. Miniature synchronous motor used in analog clocks. The rotor is made of permanent magnet. Small synchronous motor with integral stepdown gear from a microwave oven. A synchronous electric motor is an AC electric motor in which, at steady state, [1] the rotation of the shaft is synchronized with the frequency of the supply ...A commercial traction motor (Prius 2010), designed with Nd-Fe-B magnets for maximum power 60 kW and maximum speed 13,500 rpm, is used as the baseline for comparing the HRMM design. The HRMM design shows comparable performance with the commercial design for the given speed range with ~ 50% reduction in critical rare earth …Jan 13, 2023 · Structure Review of Inner Permanent Magnet Synchronous machines (PMSM) Radial magnetization pattern can used applied to the permanent magnet motors, motors are in different size and shapes for the different applications. In this section different kind of PM motors will be reviewed. Field Excitation (FE) Permanent Magnet (PM) Hybrid Excitation (HE) Structure Review of Inner Permanent Magnet Synchronous machines (PMSM) Radial magnetization pattern can used applied to the permanent magnet motors, motors are in different size and shapes for the different applications. In this section different kind of PM motors will be reviewed. Field Excitation (FE) Permanent Magnet (PM) …A magneto-structural combined dimensional and topology optimization approach for interior permanent magnet synchronous machine (IPMSM) rotor design is proposed using the solid isotropic material with penalization (SIMP) density-based topology optimization method. This method optimizes the location and dimensions of the …Brushless DC electric motor. The motor from a 3.5 in floppy disk drive. The coils, arranged radially, are made from copper wire coated with blue insulation. The rotor (upper right) has been removed and turned upside-down. The grey ring inside its cup is a permanent magnet. This particular motor is an outrunner, with the stator inside the rotor. In order to get rid of the bulky and lossy differential gears and to enhance the system robustness, the magnetic differential (MagD) system is proposed after the mechanical differential (MechD) and electronic differential (ElecD) systems. The MagD system is mainly composed of the double-rotor (DR) stator-permanent-magnet (PM) …Rotor configurations strongly affect the torque and efficiency performance of permanent magnet electric motors. In this paper, different rotor configurations of the permanent magnet BLDC motor ...The accurate calculation and reduction of electromagnetic force waves are important prerequisite for the evaluation and optimization of electromagnetic vibration. In this paper, an accurate calculation method of air gap permeance is proposed, the air gap flux density and the resulting electromagnetic force waves of 6p36s surface-mounted …2.1 Design of Rotor Eccentric Arc and Performance Analysis. This paper takes a permanent-magnet rotor as an example. Figure 1 shows 1/8 models of a rotor without an eccentric arc design, a rotor core designed with a conventional eccentric arc, and a rotor core designed with the improved eccentric arc. The permanent magnets of the …2 Rotor system dynamics modelling of high-speed PM motor 2.1 Support characteristics of active magnetic bearings (AMBs) To make the rotor reach a high speed, the use of non-contact magnetic bearing or air bearing is required. First the rotor critical speed analysis needs to study the support characteristics of rotor-bearing system.Permanent magnet generator (PMG) for vehicles has attracted more and more attention because of its high efficiency, high power density, and high reliability. However, the weak main air-gap magnetic field can affect the output performance and the normal use of electrical equipment. Aiming at the problem, this paper took the rotor …Axial flux permanent magnet (AFPM) motors offer superior power, efficiency, and torque density with their unique flat rotor and stator arrangement. Originally developed for vehicle applications, these motors have seen significant advancements in materials, making them even more powerful and compact. Ongoing research is focused …Metrics. Permanent magnets constructed from metal ions and organic linkers using molecular design principles could bring transformative advances in areas such as energy conversion, transportation ...Permanent magnet traction motor has the advantages of high efficiency, high power density, high torque density and quick dynamic response, which has been widely used in the traction field of electric vehicle. The high-performance control of permanent magnet traction motor depends on accurate rotor position information, which is usually …Several new topologies without permanent magnets in the rotor have been published recently [3]. These topologies feature either a low mechanical complexity [4], a wide air gap to rotor radius ratio [5], further called gap factor G, or a good torque per stator permanent magnet mass ratio [6]. In theory, reluctance rotors have advantages for very ...High Performance Magnets and Precision Assemblies. Arnold’s high-performance permanent magnets have a wide variety of applications, from electric motors on ships, aircraft, and motorsport cars to pump couplings, batteries, solar panels and NMR Equipment. Our diverse markets allow us to keep our technologies on the leading edge of innovation. An integrated-starter-generator (ISG) is a key component of hybrid electric vehicles (HEVs), which starts the engine as a motor and generates electric power as a generator according to operational conditions and system requirements [1,2,3].At present, conventional permanent magnet (PM) brushless machines with PMs in the rotor are …Nov 11, 2021 · According to the location of permanent magnet on the rotor, the permanent magnet synchronous motor rotor mainly has two different structures: surface-mounted and buried. Due to the strength limitation of silicon steel sheets, the application of buried rotor in the high-speed field is relatively smaller than surface-mounted rotor. A surface-mounted permanent magnet synchronous motor (SPMSM) is an electric motor with a simple magnetic circuit design, fast responsiveness, linear torque–current characteristics, speed–voltage characteristics, and constant operating speed. SPMSMs use only magnetic torque; however, interior PMSMs (IPMSMs) have high …The designed external rotor PMSynRM motor is shown in Fig. 1.PMSynRM is designed to be mounted in the wheels of the EVs. The design parameters of the designed motor are given in Table 1.The d-axis and q-axis magnetization inductances play an important role in determining the electromagnetic performance of the motor [] and this is …Aiming at the rotor strength problem of high speed permanent magnet synchronous motor (HSPMSM), a design method for maximum outer diameter of permanent magnet is proposed. Firstly, on the basis of mechanics of materials, the stress analytical model of HSPMSM rotor with anisotropic material is established. Then, the …2.1 Design of Rotor Eccentric Arc and Performance Analysis. This paper takes a permanent-magnet rotor as an example. Figure 1 shows 1/8 models of a rotor without an eccentric arc design, a rotor core designed with a conventional eccentric arc, and a rotor core designed with the improved eccentric arc. The permanent magnets of the …The accurate calculation and reduction of electromagnetic force waves are important prerequisite for the evaluation and optimization of electromagnetic vibration. In this paper, an accurate calculation method of air gap permeance is proposed, the air gap flux density and the resulting electromagnetic force waves of 6p36s surface-mounted …All motors run on the principle that interacting magnetic fields in the rotor (the rotating component) and the stator (the stationary component) generate motion. …Measure Skewing Angle. MagScope software makes it easier than ever to measure the skewing angle of skewed permanent magnet rotors, enabling the detection of skewing angle deviations. The right figure shows an example of the step skew on an IPM (Interior Permanent Magnet) rotor, represented in a cross-section graph with automatic zero-crossing ... In this study, a three‐phase outer rotor PMaSynRM with a power of 1 kW and a speed of 750 rpm was designed. The stator and rotor geometric structures of the designed motor were determined. The combination of slots/poles …Dual Rotor Axial Flux Generator (DRAFG) is a permanent magnet axial flux generator commonly used for low speed power generation using wind power. This generator can generate useful amount of ...Arnold produces high performance permanent magnet motor components and sub-assemblies for aerospace and defense, industrial, automotive, and motorsport applications, such as: KERS — Kinetic Energy Recovery …Sep 2, 2020 · In the PMSG that has not been the CT reduction technique, the rotor permanent magnets (PMs) have an increasing effect on the CT since each PM has the same relative position with reference to the stator slots . The CT in each PM is in the same phase as the others, so, the harmonic component of each is added together then, CT has become higher. The SPMSM has the permanent magnets fixed on the surface of the rotor leading to a symmetrical radial air-gap reluctance path between the rotor and the stator core. The IPMSM has the permanent magnets inserted inside the rotor core leading to a non-symmetrical radial air-gap reluctance path between the rotor and the stator core. The research is devoted to the investigation of NdFeB permanent magnet (PM) based synchronous generators with non-overlapping concentrated windings. The rotor of such …Metrics. Permanent magnets constructed from metal ions and organic linkers using molecular design principles could bring transformative advances in areas such as energy conversion, transportation ...Electromagnetic interaction between the rotor permanent magnet and the stator slots is quite large. (1000 N simulated value for this motor). The air-gap needs to be as small as 1 mm. Fig. 4a shows the single disc of rotor with 9° skewed permanent magnets. The machine rotors were constructed by using mild-steel.1. Introduction. At present, the low-speed high-torque transmission system has vast application prospects in the application fields of ship propulsion, lifting, mining and oil field exploitation [1].Permanent magnet motors can maintain good performance in a wide range of load changes, so they have received extensive attention in low-speed and large …This paper proposes a novel layered permanent magnet motor (N-LPM), which is based on a three-degree-of-freedom (3-DOF) permanent magnet motor. Compared with the former, the improved N-LPM air gap magnetic density, torque and structure stability have been significantly improved. The proposed N-LPM has three …May 30, 2023 · Currently, research is being carried out on the performance improvement of permanent-magnet-synchronous motors (PMSM) used in air conditioning and blowing systems for marine, as well as structural research, regarding their high-speed operation. Surface-mounted permanent magnet (SPM) motors used in marine propulsion and air-conditioning systems have the advantages of easy rotor manufacturing ... Permanent Magnet (PM) Brushless Direct Current (BLDC) actuators/motors have many advantages over conventional machines, including high efficiency, easy controllability over a wide range of operating speeds, etc. There are many prototypes for such motors; some of them have a very complicated construction, and this ensures their …Eddy current losses in magnets are a major consideration in the rotor design of permanent magnet synchronous motors (PMSMs). Stator design choices and the use of modern inverters with high switching frequency introduce harmonics that can contribute to significant losses in the magnets, causing the rotor to heat up. In typical …Nov 15, 2016 · Any device that turns electricity into motion, meaning electrical energy into mechanical energy, is called an electric motor. Due to the continuous need for increased power density and high efficiency levels, PM motors (permanent magnet) are now common among today’s motor market. The first electric motors used bar magnets, and were more or ... an interior permanent magnet (PM) synchronous motor into a hybrid motor. This hybrid technology uses a conventional induction rotor cage to bring the motor up to its slip speed just like any traditional induction motor. Once at slip speed, the powerful interior magnets pull the rotor into true synchronous speed with the rotating magnetic field.Apr 1, 2012 · In fact, as weâ ll explore, the major difference between PMAC and permanent magnet DC motors is that the faster a PMACâ s rotor spins, the higher back-EMF voltage is generated. Permanent magnet generator (PMG) for vehicles has attracted more and more attention because of its high efficiency, high power density, and high reliability. However, the weak main air-gap magnetic field can affect the output performance and the normal use of electrical equipment. Aiming at the problem, this paper took the rotor …2.1 Selection of Solution Variants for Analysis. In this study, an analysis of the selection of the number of stator slots to the number of magnetic poles was carried out for the structure of the Permanent Magnet Synchronous Motor (PMSM) with an external rotor, with surface mounted magnets (SPM) with a double-layer, concentrated winding …In this paper, a novel dual mechanical port dual rotor counter-rotating permanent magnet flux switching generator (DMPDRCR-PMFSG) for wind turbine applications is proposed. Power distribution between the inner and outer rotors of the proposed DMPDRCR-PMFSG that contributes to the cumulative output power is …Brushless DC electric motor. The motor from a 3.5 in floppy disk drive. The coils, arranged radially, are made from copper wire coated with blue insulation. The rotor (upper right) has been removed and turned upside-down. The grey ring inside its cup is a permanent magnet. This particular motor is an outrunner, with the stator inside the rotor.Rotor position information is necessary for the control of a permanent magnet synchronous motor (PMSM) and position sensorless control is the trend for its low cost, high reliability and space-saving.
Yu S B, Tang R. Electromagnetic and mechanical characterizations of noise and vibration in permanent magnet synchronous machines. IEEE Trans Magn, 2006, 42: 1335–1338. Article Google Scholar Zuo S, Lin F, Wu X. Noise analysis, calculation, and reduction of external rotor permanent-magnet synchronous motor.. What time does captain d
Today’s automotive industry has focused its studies on electric vehicles (EVs) or hybrid electric vehicles (HEVs) rather than gasoline-powered vehicles. For this reason, more investment has been made in electric motors with high efficiency, high torque density, and high-power factor to be used in both EVs and HEVs. In this study, an outer-rotor …Feb 21, 2023 · An interior permanent magnet synchronous motor (IPMSM) with ‘VV—’ shape rotor topology structure is proposed. The established two-dimensional (2D) parameterized finite element analysis (FEA) models are used to analyze and compare the output average torque, torque density, air-gap flux density and back electromotive force (EMF) of the IPMSM with ‘V’ shape, ‘V—’ shape, ‘VV ... Jan 10, 2022 · The rated power and speed of the permanent magnet grinding electric spindle are 7.5Kw and 950r/min, respectively.The main parameters of the PMGES are as follows, the rotor mass is m = 5.66 kg; the rotor radius is R = 0.072 mm; the axial length of the air gap is L = 0.178 mm, nominal air gap length is δ 0 = 3 × 10 −3 m, air permeability is ... 2.1 Electrical Characteristics. The equivalent circuit of a PMDC motor is shown in Fig. 1. The supply voltage and the current are given. The circuit consists of an induced voltage (Vi) in series with an armature resistor (Rarm) and inductance (Larm). The rotation of the ux generates the induced voltage. The windings of coreless axial flux permanent-magnet machine (CAFPM) are exposed to the rotor magnetic field, where each back electromotive force (EMF) harmonic is induced not only by several ...Apr 1, 2012 · In fact, as weâ ll explore, the major difference between PMAC and permanent magnet DC motors is that the faster a PMACâ s rotor spins, the higher back-EMF voltage is generated. effects of magnet polarities [18,19], PM number [20], winding configurations[21,22], asymmetrical stator pole [23], stator/rotor combinations [24] etc., and their effects on electromagnetic characteristics have been presented. Further more, investigations of the working mechanism have demonstrated that only fundamental rotor permeance and1. Introduction. At present, the low-speed high-torque transmission system has vast application prospects in the application fields of ship propulsion, lifting, mining and oil field exploitation [1].Permanent magnet motors can maintain good performance in a wide range of load changes, so they have received extensive attention in low-speed and large …May 30, 2023 · Currently, research is being carried out on the performance improvement of permanent-magnet-synchronous motors (PMSM) used in air conditioning and blowing systems for marine, as well as structural research, regarding their high-speed operation. Surface-mounted permanent magnet (SPM) motors used in marine propulsion and air-conditioning systems have the advantages of easy rotor manufacturing ... An interior permanent magnet synchronous motor (IPMSM) with ‘VV—’ shape rotor topology structure is proposed. The established two-dimensional (2D) parameterized finite element analysis (FEA) models are used to analyze and compare the output average torque, torque density, air-gap flux density and back electromotive force …Permanent-magnet motors can be designed to operate at synchronous speed from a supply of constant voltage and frequency. The magnets are embedded in the rotor iron, and a damper winding is placed in slots in the rotor surface to provide starting capability. Such a motor does not, however, have means of controlling the stator power factor. A permanent magnet is a material that can provide magnetic flux when magnetized with an applied magnetic field and its magnetism capability is characterized by two key parameters: remanence and coercitivity. In general, the intrinsic coercitivity of a permanent magnet (Hcj ) is greater than 300kOe (in the CGS unit) or 24kA / m (in the SI unit). An interior permanent magnet synchronous motor (IPMSM) with ‘VV—’ shape rotor topology structure is proposed. The established two-dimensional (2D) parameterized finite element analysis (FEA) models are used to analyze and compare the output average torque, torque density, air-gap flux density and back electromotive force …More specifically, the rotor itself contains permanent magnets, which are either surface-mounted to the rotor lamination stack or embedded within the rotor …Conventional high-speed flux-switching machines have either a high fundamental frequency or more even harmonics. This paper proposes a novel six-slot four-pole axial flux-switching permanent magnet machine for high-speed applications. The machine, consisting of two radially distributed stators and one rotor, can effectively …The accurate calculation and reduction of electromagnetic force waves are important prerequisite for the evaluation and optimization of electromagnetic vibration. In this paper, an accurate calculation method of air gap permeance is proposed, the air gap flux density and the resulting electromagnetic force waves of 6p36s surface-mounted …An ironless rotor structure wastes permanent magnet material, since the magnetic circuit closes through air in the rotor side. Therefore, a thin steel rim, to which the magnets are attached, is employed (Fig. 9.1) The rim can be either a laminated structure, in which case the eddy current losses of the rotor remain.
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