• Title/Summary/Keyword: outer rotor

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The Characteristic of the Hub Construction Wind Power Industry of the West-South Seashore with Favorable Products (서남해안 풍력산업 허브 구축사업의 유망 상품의 특성)

  • Cha, In Su;Kim, Taehyung;Lee, Ki Bong
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.179.1-179.1
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    • 2010
  • This paper has represented about the wind power industry of the west-south seashore with leading industry development for Honam Economic Region. These projects have composed of wind power industry of the west-south seashore, offshore wind turbine(2MW, 3MW) and onshore wind turbine(3kW, 5kW, 10kW), 11 projects, during 3 years- with honam leading industry development for economic region. The contents of these project are 3 favorable products and 3 business support projects. The favorable products are the MW offshore wind system with Outer-rotor type PMSG, the 3MWoffshore wind system with adaptation type of west-south sea, the hybrid generator system with wind turbine technology basis.

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A Novel Double-Loop Vector Control Strategy for PMSMs Based on Kinetic Energy Feedback

  • Wang, Anbang;Wang, Qunjing;Jiang, Weidong
    • Journal of Power Electronics
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    • v.15 no.5
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    • pp.1256-1263
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    • 2015
  • A novel vector control strategy for a permanent magnet synchronous motor (PMSM) based on the kinetic energy stored in the rotor is proposed in this paper. The novel strategy is composed of two closed loops, in which the current loop is the inner loop, and the kinetic energy serves as the outer loop. The theoretical basis and the design procedure of the two loops are given. The feasibility of the proposed control strategy is verified by experimental results. When compared with traditional vector control strategies, the proposed vector control strategy based on energy feedback has better dynamic performance. In addition, an effective estimation solution for the load variation is put forward.

A Small Disk-type Hybrid Self-healing Motor (소형 원판형 하이브리드 자기 부상 모터)

  • ;Yohji Okada
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.11 no.8
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    • pp.338-348
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    • 2001
  • A hybrid self-hearing motor, which Is a functional combination of general permanent magnet (PM) motor and hybrid active magnetic bearing(AMB), was proposed a few years ago. In this paper the hybrid self-bearing motor is modified to a disk type, in which one of two magnetic hearings was substituted for a thin yoke to make the system more compact. An outer rotors in this self-hearing motor is actively controlled only in two radial directions while the ocher motions are passively salable owing to the disk-type structure. Main advantages of the proposed self-hearing motor are simple control mechanism, low power consumption and smart structure. Mathematical model for the magnetic force Is built wish consideration of the radial displacement of the rotor. The model helps us not only to design a levitation controller but also to expect the system performance. Some experimental results show good capability and feasibility of the Proposed self-bearing motor.

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TFM 3D Simulation to design an actuator for Mobile Robot climbing stairs (계단 승월용 이동로붓의 구동모터 제작을 위한 TFM의 3D 시뮬레이션)

  • Yun, Sang-Seok;Kim, Seung-Ho;Choi, Chang-Hwan;Kim, Chul-Soo;Park, Kyi-Hwan
    • Proceedings of the KIEE Conference
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    • 2003.10b
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    • pp.75-78
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    • 2003
  • Mobile Robot climbing stairs needs high power and high efficiency. one of the high power type motor is Transverse Flux Motor (TFM). Moreover, TFM is a high force density per volume. We analyzed a characteristic for the TFM and simulated the parametric research of the TPM by using 3D FEM solutions. It presents to design the basis of the TPM. design parameters are Radius of outer rotor, pole height, pole depth, pole depth, airgap, and Magnetomotive force.

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Design of Slot Wedge Shape for Reducing Cogging Torque in Outer Rotor Type Permanent Magnet Synchronous Generator with Open Slot Structure (개방형 슬롯 구조를 갖는 외전형 영구자석 동기발전기의 코깅 토크 저감을 위한 슬롯 ��지 형상 설계)

  • Kim, Bong-Ju;Park, Su-Kang;Moon, Jae-Won;Kwon, Byung-Il
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.936-938
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    • 2011
  • This paper suggests the slot wedge shape for reducing the cogging torque of a gearless type direct-drive permanent magnet synchronous generator with open slot shape. To achieve this, we are designed the appropriate specifications of the permanent magnet synchronous generator by selected the appropriate material of slot wedge and various slot wedge shapes. The PMSG models were analyzed by finite element method. Finally, we have suggested appropriate material of slot wedges and its shape which has benefit to further reducing cogging torque and preventing decreasing of the generating power.

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In-wheel Motor Design for an Electric Scooter

  • Lee, Ji-Young;Woo, Byung-Chul;Kim, Jong-Moo;Oh, Hong-Seok
    • Journal of Electrical Engineering and Technology
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    • v.12 no.6
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    • pp.2307-2316
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    • 2017
  • The aim of this paper is to provide an optimal design of in-wheel motor for an electric scooter (E-scooter) considering economical production. The preliminary development in-wheel motor, which has a direct-driven outer rotor type attached to the E-scooter's rear wheel without any gear, is introduced first. The objective of the optimal design of this in-wheel motor is to improve the output characteristics of the motor and to have a stator form to facilitate automatic winding. Response surface methodology was used for the optimal design and 2-dimensional finite element method was used for electro-magnetic field analysis. Experimental results showed that the designed and fabricated in-wheel motor could satisfy the required specifications in terms of speed, power, efficiency, and cogging torque.

Characteristic Analysis of Outer-Rotor Type SRM for Washing Machines (세탁기용 외전형 SRM의 특성해석)

  • Park, Bo-Ryang;Kim, A-Ran;Ahn, Jin-Woo;Lee, Dong-Hee
    • Proceedings of the KIPE Conference
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    • 2011.07a
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    • pp.531-532
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    • 2011
  • 본 논문에서는 세탁기의 DD Moter로 사용되고 있는 BLDCM을 대신하여 세탁기의 부하에 따른 세탁모드와 탈수모드의 특징에 만족시키는 외전형 SRM을 설계하였다. 이와 같은 특징을 고려하여 외전형 SRM의 극 조합으로 12/8, 18/12, 36/24 극에 대해 설계하고 유한요소해석법을 통해 외전형 SRM의 특성을 해석하였다. 본 논문에서는 세탁기용 전동기에 알맞은 구조로 18/12극이 적절한 것으로 평가되었다.

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A Study of Cogging Torque Minimization for a Outer-Rotor Type Small BLDC Motor by using Latin Hypercube Sampling strategy (II) (LHS를 이용한 소형 다상 외전형 BLDC 전동기의 코깅토크 최소화 연구 (II))

  • Woo, Sung-Hyun;Chung, Hyun-Koo;Kim, Yong-Bae;Shin, Pan-Seok;Oh, Jin-Seok;Kong, Yeong-Kyung
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.646_647
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    • 2009
  • 소형 다상 외전형 BLDC 전동기의 코깅토크를 최소화하기 위해 코깅토크의 발생원인 중 하나인 영구자석의 형상에 샘플링 포인트 기법인 LHS를 이용한 최적화 알고리즘을 적용하여 코깅토크를 최소화하는 최적 설계를 수행 하였다. 총 3번의 반복계산을 하여 코깅토크가 최소화 되는 최적점을 계산한 결과,최대 코깅토크가 0.20 [N.m]에서 0.15 [N.m]로, 초기 형상의 약 75%로 감소되었다

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A Design on Reduction Cogging Torque of Dual Generator Radial Flux Permanent Magnet Generator for Small Wind Turbine

  • Lee, Gyeong-Chan;Jung, Tae-Uk
    • Journal of Electrical Engineering and Technology
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    • v.8 no.6
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    • pp.1590-1595
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    • 2013
  • In this paper, the design for an electromagnetic structure and reduction cogging torque of a dual generator structured RFPM generator, which is a combination of the inner- and outer-rotor types, has been proposed. We call this a dual generator radial flux permanent magnet generator. To reduce the cogging torque, firstly, stator tooth pairing was designed; secondly, stator displacement was designed and finally, stator tooth pairing and stator displacement were carried out simultaneously. We found the optimal design condition about stator tooth pairing angle combination and stator displacement angle for cogging torque minimization. As a result, a cogging was reduced by 93.3[%] by this study.

Quasi-3D analysis of Axial Flux Permanent Magnet Rotating Machines using Space Harmonic Methods (공간고조파법을 이용한 축 자속 영구자석 회전기기의 준(準)-3D 특성 해석)

  • Choi, Jang-Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.5
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    • pp.942-948
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    • 2011
  • This paper deals with characteristic analysis of axial flux permanent magnet (AFPM) machines with axially magnetized PM rotor using quasi-3-D analysis modeling. On the basis of magnetic vector potential and a two-dimensional (2-D) polar-coordinate system, the magnetic field solutions due to various PM rotors are obtained. In particular, 3-D problem, that is, the reduction of magnetic fields near outer and inner radius of the PM is solved by introducing a special function for radial position. And then, the analytical solutions for back-emf and torque are also derived from magnetic field solutions. The predictions are shown in good agreement with those obtained from 3-D finite element analyses (FEA). Finally, it can be judged that analytical solutions for electromagnetic quantities presented in this paper are very useful for the AFPM machines in terms of following items : initial design, sensitivity analysis with design parameters, and estimation of control parameters.