• Title/Summary/Keyword: Permanent Magnets

Search Result 496, Processing Time 0.024 seconds

Electromagnetic and Vibration Analysis of E-core Switched Reluctance Motor with Permanent Magnets and Auxiliary Windings

  • Saranya, S.;Balaji, M.
    • Journal of Power Electronics
    • /
    • v.19 no.2
    • /
    • pp.540-548
    • /
    • 2019

  • In this work a new configuration of E-core stator Switched Reluctance Motor (SRM) with permanent magnets and auxiliary windings embedded in the stator yoke is proposed. For the proposed configuration of SRM electromagnetic analysis is performed using Finite Element Analysis (FEA) based computer aided design package MagNet and to emphasize its merits a comparison is drawn with existing hybrid excitation configuration of SRM. In addition, the vibration characteristics of the motor are analyzed by performing modal and transient analysis using the ANSYS package. Results of the analysis reveals that the proposed configuration of SRM exhibits better electromagnetic and vibration characteristics and is capable of competing with the existing topologies in the variable speed market.

  • https://doi.org/10.6113/JPE.2019.19.2.540 인용 PDF KSCI HTML

A Noble Control Scheme of Hybrid Magnet Levitation Train (복합자석형 자기부상차량의 제어특성 개선)

  • Kwon, Byung-Il
    • Proceedings of the KIEE Conference
    • /
    • 1991.07a
    • /
    • pp.127-130
    • /
    • 1991

  • A magnetic levitation system with hybrid magnets, which is composed of permanent magnets and electromagnets, consumes less power than the conventional attraction type system. A parallel complementary controller on the lift controller is proposed to reduce the sensitivity for parameter variation and force disturbance. Simulation and experiment show that the lift system has robustness to force disturbance.

  • PDF

Design of a wind turbine generator with low cogging torque by using evolution strategy (진화론적 알고리즘을 이용한 코깅토크가 적은 풍력발전기의 설계)

  • Park, Ju-Gyeong;Cha, Guee-Soo;Lee, Hee-Joon;Kim, Yong-Sub
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.17 no.11
    • /
    • pp.755-760
    • /
    • 2016

  • The demand for independent generators using renewable energy has been increasing. Among those independent generators, small wind turbine generators have been actively developed. Permanent magnets are generally used for small wind turbine generators to realize a simple structure and small volume. On the other hand, cogging torque is included due to the structure of the permanent magnet synchronous machine, which can be the source of noise and vibration. The cogging torque can be varied by the shape of the permanent magnet and core, and it can be reduced using the appropriate design techniques. This paper proposes a design technique that can reduce the cogging torque by changing the shape of the permanent magnets for SPMSM (Surface Permanent Magnet Synchronous Motor), which is used widely for small wind turbine generators. Evolution Strategy, which is one of non-deterministic optimization techniques, was adopted to find the optimal shape of the permanent magnets that can reduce the cogging torque. The angle and outer diameter of permanent magnet were set as the design variable. A 300W class wind turbine generator, whose pole/slot combination was 8 poles/18 slots, was designed with the proposed design technique. The properties of the generator, including the cogging torque and output voltage, were calculated. The calculation results showed that the cogging torque of the optimized model was reduced compared to that of the initial model. The design technique proposed by this paper can be an effective measure to reduce the cogging torque.

  • https://doi.org/10.5762/KAIS.2016.17.11.755 인용 PDF KSCI