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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...
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...
Recently, there has been interest in using alternative conductor geometries such as Litz wires, transposed conductors, rectangular, and form wound conductors for realizing electric machines to increase the armature current density and thermal performance. Among these, the application of foil conductors has been demonstrated in an axial flux machine and a preliminary study on the AC loss modeling and...
The design of the first stage of a 59:1 multistage magnetic gearbox for a wind turbine demonstrator is presented. The multistage magnetic gearbox (MSMG) is composed of a two stage magnetic gearbox (MG). The first stage of the MSMG has a gear ratio of 6.45. A spoke type MG rotor typology is used with a unique segmented fully laminated rotor structure. Axially segmented magnets and a unique set of radial...
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...
An interior permanent magnet synchronous machine drive exhibits an inherent wide speed range capability. In order to exploit this peculiar characteristic while assuring the lowest power losses, a proper control algorithm has to be used. In particular, as long as the required voltage is below the limit imposed by the available DC bus, the control algorithm must command the maximum torque per ampere...
Implementation of a Fuzzy Logic speed controller for a Permanent Magnet DC (PMDC) motor using a low-cost Arduino interfaced with a standard xPC Target MATLAB environment is demonstrated. The Arduino solution is acceptable at kHz sampling frequencies. The study of speed control of PMDC motor based on Arduino and L298N H-Bridge using an artificial intelligence control method, such as Fuzzy PID with...
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 presents the results of field calculations of cogging torque of a 12-pole torque motor with an 18-slot stator. A constant angular velocity of the magnet and the same size gap between n-1 magnets were assumed. In these conditions, the effect of change of the nth gap between magnets on the cogging torque was tested. Due to considerable length of the machine the calculations were performed...
This paper presents the design and analysis of high performance flat-type linear permanent magnet gears. A salient pole mover structure and a simple scheme of pole shift are proposed. Totally thirteen topologies (including those of the conventional topology and the twelve new topologies) with different mover structures are given. The corresponding prototypes with a gear ratio of −5.5:1 are optimally...
The paper presents an analysis of influence of selected fault states on properties of brushless DC motor with permanent magnets. The subject of study was BLDC motor designed by the authors for unmanned aerial vehicle hybrid drive. Four parallel branches per each phase were provided in the discussed 3-phase motor. After open-winding fault in single or few parallel branches, a further operation of the...
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 accurate knowledge of the machine parameters is a well-known important prerequisite for the inverter control design of variable speed drives. Due to the non-linear characteristics caused by cross-coupling and saturation effects the calculation of the inductances and in particular the magnetic flux of synchronous machines cannot be done straightforward. This paper presents a numerical stable method...
This paper presents the theoretical analysis of flux-weakening performance of series permanent magnet (SPM) memory machine. A modified circle diagram is proposed to graphically illustrate the maximum torque per voltage (MTPV) flux-weakening control strategy for the memory machine. It is shown that a maximum torque capacity can be obtained by controlling the armature current and magnet flux simultaneously...
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...
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...
This paper introduces a new topology of multi-stator hybrid excitation permanent magnet synchronous motor with flux weakening capacity. The presented machine features a hybrid magnetic circuit in which the flux generated by PMs are routed into two paths by employing an axial stator. The detailed structure of the presented machine is given in this paper together with the principle of flux weakening...
Line-start permanent magnet synchronous motor with composite rotor is a new type of permanent magnet synchronous motor, which uses eddy currents induced in solid rotor and copper bars to achieve self- starting capability. In order to research the demagnetization of permanent magnets under three-phase short circuit and out-of-step fault, the finite element model considering saturation, eddy currents...
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