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Showing 1 to 18 of 18 for “"permanent magnet machines"”.
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SENSORLESS CONTROL OF BRUSHLESS PERMANENT-MAGNET MACHINES FOR POWER TOOL APPLICATION
Permanent-magnet-synchronous-machine (PMSM) drives are widely used in industrial and commercial applications which requires fast dynamic response and accurate control over wide speed ranges. Although, there exists challenges to develop position-sensorless based vector control of PMSM operating in …
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Modelling and detection of faults in axial-flux permanent magnet machines
… topologies and configurations of axial-flux permanent magnet machine has spurred its use for electromechanical energy conversion in several applications. As it becomes increasingly deployed, effective condition monitoring built on reliable and accurate fault detection techniques is needed to …
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Analysis and Modelling of Fractional-Slot Concentrated-Wound Interior Permanent Magnet Machines
… concentrated-wound (FSCW) interior permanent magnet (IPM) machines and establishes a basis for their magnetic and electrical analysis. In the state of the art methods for analyzing such machines, the non-homogeneous magnetic saturation and the non-linear B-H curve of the rotor iron …
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Design and Multi-physical Fields Analysis of High Speed Permanent Magnet Machines
… high efficiency and compact size, high speed permanent magnet machines (HSPMMs) have found wide application in industrial areas. Compared with a conventional speed permanent magnet machine, a HSPMM rotor can reach speeds of more than 10,000 rpm, which brings challenges with regard to …
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Analytical representation and finite element analysis of magnetically-geared permanent magnet machines
Recently, magnetic gears have drawn significant interest as a promising alternative to their mechanical counterparts by introducing features such as generating high torque at low speed, reduced acoustic noise and vibrations, low maintenance, inherent overload protection, improved reliability, …
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Analytical methods for electromechanical forces and torque computation in brushless permanent magnet machines
… forces that are present in a machine due to the magnetic field set up by current-carrying conductors and coils, especially when in the presence of permeable iron, is one of the most important and difficult problems in the vast field of the theory and design of electrical machines. It is a …
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Aspects of magnetisation and iron loss characteristics in switched-reluctance and permanent-magnet machines
In the first section, the magnetisation characteristics of the switched-reluctance motor are examined. Measurements have been carried out using both static and dynamic test methods. The test data has been compared with simulation results from analytical design programs and finite element models. …
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High-frequency, high-pole count design for improving specific power density of electric machines
… for improving specific power density of electric machines for weight and/or volume sensitive applications. Although electric machine designs have reached a limit in terms of efficiency, reliability, and cost, newer applications such as in aviation or the oil and gas industry are demanding …
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Comparison of interior permanent magnet synchronous machines for a high-speed application
Permanent Magnet machines have been increasingly used in high-speed applications due to the advantages they offer such as higher efficiency, output torque and, output power. This dissertation discusses the electrical and magnetic design of permanent magnet machines and the design and analysis of …
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Doubly-Salient Permanent Magnet Flux-Reversal-Free-Stator Switched Reluctance Machines
… hybrid machine having variable reluctance and permanent magnets (PMs) is presented. The machine makes use of the features of a PM machine and variable reluctance machine. The resulting machine is doubly salient and has a structure free of flux reversals. Unlike conventional doubly salient …
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Design of a permanent magnet motor and a drive for cranking purposes
… increased the research of applications of permanent magnets for use in automobiles. However the application of permanent magnet machines for cranking purposes has not been investigated much. Difficult operating conditions, like, a maximum current density of 35A/mm², and the ability to …
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Parameter Identification And Fault Detection For Reliable Control Of Permanent Magnet Motors
… (DTC) and Field Oriented Control (FOC) for Permanent Magnet Machines. New detection schemes forfault detection, isolation and machine parameter identification are presented and analyzed. Different control schemes as PID, DTC, FOC for Control of PM machines have different control loops and …
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Variable air gap axial flux permanent magnet machine with mechanical field weakening
Field-weakening of electrical machines enables rotational speeds to exceed the rated values. This is particularly simple in some AC machines such as induction machines where the field strength magnitudes are determined hence controlled by a component of current in the stator windings. In …
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Linear generators for direct drive marine renewable energy converters
… on the development of two novel topology linear permanent magnet machines suitable for use in this application. For each topology, models are presented that are capable of predicting the force characteristics and dynamic generator performance. The models, which are verified experimentally, reveal …
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Modeling, design, and optimization of permanent magnet synchronous machines
… algorithms, mechanical structures, and electric machines. Running, legged robots have presented challenges in the area of electric machinery in particular. In addition to the low-speed, high-torque, low-mass requirements on the machines, the act of running results in an unconventional drive cycle …
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High-density multilevel power converters for use in renewable and transportation applications
… driving low-inductance high-density electric machines. Much of the prior work on the FCML converter has focused on various aspects of converter control. However, the demonstration of the power density and efficiency benefits of the topology have often been masked by the use of general-purpose …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Condition monitoring of electrical machines is a field which continuously demands improvement, especially as the tasks performed by these machines become more demanding and complex. Presently, the well-established condition monitoring techniques are based on steady-state analysis of various …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Condition monitoring of electrical machines is a field which continuously demands improvement, especially as the tasks performed by these machines become more demanding and complex. Presently, the well established condition monitoring techniques are based on steadystate analysis of various …