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  • Permanent magnet synchronous generator Wikipedia

    Permanent magnet generators (PMGs) or alternators (PMAs) do not require a DC supply for the excitation circuit, nor do they have slip ringsand contact brushes. A key disadvantage in PMAs or PMGs is that the air gap flux is not controllable, so the voltage of the machine cannot be easily regulated. A persistent magnetic field imposes safety issues during assembly, field service or repair. High performance permanent magnets, themselves, have structural and thermal issues. Torque current MMF vectorially c

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  • Control Engineering Understanding permanent magnet

    However, in a permanent magnet machine, the magnet reduces the available iron for flux linkage. A magnet’s permeability is near that of air. Therefore, the magnet can be viewed as an air gap. The magnet is in the flux path as it travels through the d axis. The flux path traveling through the q axis does not cross a magnet. Therefore, more iron can be linked with the q-axis flux path, which results in a

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  • Permanent Magnets in Electric Machines Electric Power

    Permanent magnets are often suitable as replacements for the field windings in electric machines, that is, they can produce the fundamental interaction field. This chapter contains, a means to develop some of the mathematical skills required and to point to some of the important issues involved. Permanent magnet materials are just materials with very wide hysteresis loops. The chapter shows a

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  • Permanent Magnets and Machines Permanent Magnet

    Permanent Magnets and Machines. With R. Krishnan. This chapter presents an introduction to permanent magnets (PM) and their varieties, their characteristics such as demagnetization, and energy density and realization of machines with PMs. The demagnetization characteristic is the one used in analysis and design of the machines, as it includes the effect of the external magnetic field intensity

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  • Three-phase permanent magnet synchronous machine with

    The Permanent Magnet Synchronous Machine block implements a three-phase or a five-phase permanent magnet synchronous machine. The stator windings are connected in wye to an internal neutral point. The three-phase machine can have a sinusoidal or trapezoidal back EMF waveform. The rotor can be round or salient-pole for the sinusoidal machine. The rotor is round when the machine is

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  • WO2006045333A1 Permanent magnet machine Google

    PERMANENT MAGNET MACHINE Field of the invention This invention relates to a magnetic repellent motor, or drive mechanism. Such a mechanism may be useful for

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  • Analysis of a permanent magnet synchronous machine used in

    The use of a permanent magnet synchronous machines (PMSMs) to achieve high performance and high energy efficiency in modern industrial technology has increased rapidly in recent decades. Similarly, the demand for PMSMs in hazardous locations has been

    Details >
  • Control Engineering Understanding permanent magnet

    However, in a permanent magnet machine, the magnet reduces the available iron for flux linkage. A magnet’s permeability is near that of air. Therefore, the magnet can be viewed as an air gap. The magnet is in the flux path as it travels through the d axis. The flux

    Details >
  • Permanent Magnets in Electric Machines Electric Power

    Permanent magnets are often suitable as replacements for the field windings in electric machines, that is, they can produce the fundamental interaction field. This chapter contains, a means to develop some of the mathematical skills required and to point to some of the important issues involved. Permanent magnet materials are just materials with very wide hysteresis loops. The chapter shows a

    Details >
  • Permanent Magnets and Machines Permanent Magnet

    This chapter presents an introduction to permanent magnets (PM) and their varieties, their characteristics such as demagnetization, and energy density and realization of machines with PMs. The demagnetization characteristic is the one used in analysis and design of the machines, as it includes the effect of the external magnetic field intensity that invariably comes into existence in the machine due to its winding

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  • Permanent Magnet Synchronous Machines MDPI

    Permanent Magnet Synchronous Machines Sandra Eriksson Department of Engineering Sciences, Uppsala University, Box 534, 751 21 Uppsala, Sweden; [email protected] Received: 2 July 2019; Accepted: 22 July 2019; Published: 23 July 2019 Abstract: Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the

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  • Permanent Magnet Synchronous Machine MATLAB &

    The PWM inverter is built entirely with standard Simulink® blocks. Its output goes through Controlled Voltage Source blocks before being applied to the PMSM block's stator windings. The load torque applied to the machine's shaft is originally set to its nominal value (3 N.m) and steps down to 1 N.m at t = 0.04 s. Two control loops are used. The inner loop regulates the motor's stator currents. The outer loop

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  • Permanent Magnets and Machines Taylor & Francis Group

    This chapter presents an introduction to permanent magnets (PM) and their varieties, their characteristics such as demagnetization, and energy density and realization of machines with PMs. The demagnetization characteristic is the one used in analysis and design of the machines, as it includes the effect of the external magnetic field intensity that invariably comes into existence in the machine due to its winding

    Details >
  • Analysis of a permanent magnet synchronous machine used in

    The use of a permanent magnet synchronous machines (PMSMs) to achieve high performance and high energy efficiency in modern industrial technology has increased rapidly in recent decades. Similarly, the demand for PMSMs in hazardous locations has been

    Details >
  • Axial Flux Permanent Magnet Brushless Machines

    Axial Flux Permanent Magnet (AFPM) brushless machines are modern electrical machines with a lot of advantages over their conventional counterparts. They are being increasingly used in consumer electronics, public life, instrumentation and automation system, clinical engineering, industrial electromechanical drives, automobile manufacturing industry, electric and hybrid electric vehicles

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  • Permanent Magnet AC Motors Motor Control & How

    12.06.2012· Video on Permanent Magnet motors; How they work and how to control them. Presented by Texas Instruments for use on DIYInventor. Please thumbs

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  • Iron Loss and Parameter Measurement of Permanent

    Iron Loss and Parameter Measurement of Permanent Magnet Synchronous Machines. Richter, Jan; Dollinger, Andreas; Doppelbauer, Martin. Abstract: In this paper a measurement technique for synchronous machines is presented that allows the experimental identification of stator flux linkage as well as iron and friction losses in each operation point. The technique can be applied to all kinds of

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