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This paper describes the experimental study of a synchronous magnetoelectric generator which magnetic system is based on the asynchronous motor: the stator of magnetoelectric generator is made up of induction machine with a number of poles pairs 2p=12, a cylindrical inductor (rotor) is composed of permanent magnets distributed on the rotor surface. The modeling of magnetic system was carried out using...
The development of element base and manufacturing technologies is always one of the important scientific and technological issues. Both the search for the latest technical solutions and the improvement of known devices remain relevant. These trends are also true for permanent magnet motors used as a propulsion system for an unmanned aerial vehicle. The purpose of the research is to calculate and model...
The paper considers the principle of stabilization for the rotation speed with the use of a magnetic CVT in the form of a magnetic gearbox providing the required reduction coefficient. The paper is devoted to investigations of transients in a autonomous power system consisting of wind turbines with synchronous generators with permanent magnets under sudden change wind speed. The investigation involves...
This paper presents a new investigation of the permanent magnet dimension selection for an AlNiCo based variable-flux machine based on the permanent magnet operating point. To do this, the magnetic features of an AlNiCo permanent magnet material are reviewed and an analytical method to estimate the magnetization level of the permanent magnet at different operation conditions is presented. Moreover,...
In this study slip permanent magnet couplers (slip-PMC) for wind turbine application are introduced and their analysis technique used in finite element method (FEM) is presented. Two optimization methods are employed in determining optimum permanent magnet (PM) rotors for a fixed wound rotor size. The machine topologies, namely surface-mounted and spoke-mounted PM rotor topologies are evaluated against...
This paper presents a new study on the comparison of dual-rotor single-stator (DRSS) and dual-stator single-rotor (DSSR) axial flux-switching permanent magnet (AxFSPM) machines. The DRSS and DSSR AxFSPM machines have the same dimensions except for stator and rotor yoke lengths. 3-D finite element analysis (FEA) and experimental verification are used for the comparison study. The comparison results...
In an Organic Rankine Cycle (ORC) systems, the Permanent Magnet (PM) generator is directly coupled to high-speed turbine shaft, in order to increase system efficiency avoiding introduction of gear-box. On the other hand, current time harmonics induce high frequency currents in rotor parts, which cause a temperature increase. PMs are strongly affected by the operating temperature, since both remanence...
This paper proposes a new design of high-temperature starter-generator with external rotor to be installed on high pressure shaft of aircraft engine to implement More Electrical Engine concept. The basic materials to make this starter-generator were selected and justified. Multi-criteria optimization of the developed design was performed using a genetic algorithm and Pareto method. The optimum (in...
Motor drive operation mechanism of High-Voltage Circuit Breaker(HVCB) need permanent magnet synchronous motor(PMSM) with high-dynamic response. Reducing the rotor inertia of PMSM is one technique to realize high dynamic response of the motor. By digging holes in the rotor, the inertia can be reduced. The influence of shape, position and size of inertia-reducing holes on the performance of PMSM is...
This paper presents the design and optimization of a high-efficiency permanent magnet synchronous alternator with the desired output power of 2 kW at 6 krpm applying to the truck power system. This kind of alternator requires low output voltage and high current. In order to effectively increase the overload power handing capability and efficiency of the designed alternator, the low torque angle is...
High torque density at low speed is one of the main characteristics of applications such as wind turbines and traction systems. Permanent magnet transverse flux machines exhibit this features owing to their high-energy magnetic flux, which is normal to current and motion vector. The machine's specific geometry magnifies cogging torque that further increases torque ripple, noise, and mechanical vibrations...
The paper includes simulation results of the Hybrid Excited Claw Pole Generator with skewed and non-skewed permanent magnets. The test machine has claw poles on two rotor sections, between which an excitation control coil is placed. The novelty of this machine is existence of non-skewed permanent magnets on claws of one part of the rotor and skewed permanent magnets on the second one. The paper presents...
The magnetic bearing using the high temperature bulk superconductor (HTS) has been developed. In this system, the ring shaped permanent magnet is installed in the rotor. It has two poles. This configuration realizes increment of the linkage flux of the surface of the HTS on the stator. Pinning force of the HTS is used to support the rotor weight and keep the rotor stability. Pinning force depends...
Magnetoelectric turbo-generators with direct drive from a turbine which rotor speed reaches several hundreds thousands rpm are widely used in microturbine power plants. Due to the action of centrifugal forces, the permanent magnets of the rotors endure considerable mechanical stresses. In most cases, brittle rare-earth permanent magnets are used in microturbines. To ensure the mechanical stress of...
Efficiency improvements attainable with permanent magnet motors have been well documented. Some permanent magnet motors have been equipped with an induction cage in the rotor to allow direct on line starting. Designs of this type have been referred to as line start permanent magnet motors. A topic that has not received much attention is the use of this type of motor with an adjustable speed drive...
This, paper examines how changing the magnetic orientation of permanent magnets in concentrated winding interior permanent magnet synchronous motors (IPMSMs) affects their demagnetization resistance. We evaluated a prototype for demagnetization at 180°C that consists of a 130-degree V-shaped rotor core in which parallelogram magnets with oblique orientation are arranged and confirmed by finite element...
This paper presents thermal analysis of a water-cooled dual-stator axial-flux permanent magnet (AFPM) machine with focus on the sandwiched rotor. The rotor of the machine is featured by combined rectangle-shaped magnets. Firstly, the eddy current losses in the PM are calculated and analyzed. Secondly, lumped-parameter and FE thermal models are established to calculate the temperature distribution...
Aiming at the problem of multi-DOF bionic drive, a new type of hybrid driven permanent magnet multi-DOF motor with liquid suspension mode is presented in this paper. The structure and working principle of the motor are introduced in detail. The analytical method and the finite element method are used to analyze the air gap magnetic field, and the results are compared and verified. In addition, the...
This paper investigates a novel hybrid axial- and radial-magnetic circuit permanent magnet synchronous machine with flux weakening capability. The presented machine consists of a solid rotor and two stators, i.e. radial stator and axial stator. The PMs are radially buried in the solid rotor so that the flux flows into both radial and axial stator. This paper describes the principle of the presented...
An external rotor transverse flux motor has been proposed in our previous research, which has the advantages of low manufacturing cost and high torque density. In this paper, a novel transverse flux is introduced based on the foregoing motor's structure. At first, the detail motor structures and working principle are introduced. Then, the three-dimensional model of proposed motor is built by finite...
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