• Title/Summary/Keyword: surface-mounted permanent magnet motor

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Design and Experimental Verification of an Interior Permanent Magnet Motor for High-speed Machines (고속회전기 적용을 위한 매입형 영구자석 전동기의 설계 및 실험적 검증)

  • Kim, Sung-Il;Lee, Geun-Ho;Lee, Chang-Ha;Hong, Jung-Pyo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.2
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    • pp.306-310
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    • 2010
  • On account of small size and light weight, a high-speed machine is regarded as a key technology for many future applications of drive systems. In high-speed applications, permanent magnet synchronous motors have a number of merits such as high efficiency and high power density. Therefore, they are suitable for driving the air-blower of a fuel cell electric vehicle (FCEV) where space and energy savings are critical. Particularly, a surface-mounted permanent magnet synchronous motor (SPMSM) of them is mainly used as a high-speed machine. However, the motor has a fatal flaw due to a retaining can to maintain the mechanical integrity of a rotor assembly. The can results in the increase of magnetic air-gap length in the SPMSM. Thus, in this paper, an interior permanent magnet synchronous motor (IPMSM) is applied in order to drive the air-blower of FCEV instead of the SPMSM, and the experimental results of two models are compared to verify the capability of the IPMSM for high-speed applications.

Design of an Adaptive Speed Regulator for a Surface-Mounted Permanent Magnet Synchronous Motor (표면부착형 영구자석 동기전동기의 적응속도제어기 설계)

  • Choi, Young-Sik;Yu, Dong-Young;Jung, Jin-Woo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.15 no.6
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    • pp.425-431
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    • 2010
  • This paper proposes a new adaptive speed controller for the speed control of a surface-permanent magnet synchronous motor. The proposed adaptive controller is very insensitive to model parameter and load torque variations since it does not require any accurate information on the motor parameter and load torque values. Moreover, the stability of the proposed control system is analytically proven. To verify the effectiveness of the proposed adaptive speed controller, simulation and experimental results are shown under motor parameter and load torque variations. It is clearly validated that the proposed speed regulator can precisely control the speed of permanent magnet synchronous motors.

Online Parameter Estimation of SPMSM using Affine Projection Algorithm (Affine Projection 알고리즘을 이용한 표면 부착형 영구자석 전동기의 온라인 파라미터 추정)

  • Moon, Byung-Hun;Kim, Hyoung-Woo;Choi, Joon-Young
    • The Transactions of the Korean Institute of Power Electronics
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    • v.23 no.1
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    • pp.66-71
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    • 2018
  • We propose an online parameter estimation method for surface-mounted permanent-magnet synchronous motor (SPMSM) using an affine projection algorithm (APA). The proposed method estimates parameters with two APAs based on the discrete-time model equation of SPMSM during motor operation. The first APA is designed to estimate inductance, and the second APA is designed to estimate resistance and flux linkage. However, in case when the d-axis current is controlled to 0A, the second APA cannot estimate resistance and flux linkage simultaneously because the matrix rank in APA becomes deficient. To overcome this problem, we temporarily inject a negative reference current input to the d-axis control loop, and the matrix in the APA then becomes full rank, which enables the simultaneous estimation of resistance and flux linkage. The proposed method is verified by PSIM simulation and an actual experiment, and the results reveal that SPMSM parameters can be estimated online during motor operation.

Permanent magnet gearless traction drive for German high speed train ICE 3

  • Binder A.;Koch Th.
    • Proceedings of the KIPE Conference
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    • 2001.10a
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    • pp.756-760
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    • 2001
  • Two different designs of permanent magnet motors as direct wheel-set drive for the German high speed train ICE 3 are designed, one with surface mounted magnets (SM) and one with buried rotor magnets (BM). The surface magnet motor has $17\%$ less mass and a slightly higher efficiency and was therefore chosen for further investigations. Compared with the conventional drive system of the ICE 3, consisting of geared inverter fed induction machines, the gearless permanent magnet direct drive yields about $16\%$ lower losses. This calculation is based on the route parameters of the high speed track between Frankfurt/Main and Cologne in Germany, which is currently under construction.

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Vector Control of a Surface-mounted Permanent Magnet Synchronous motor Including Iron Loss (표면부착형 동기전동기의 철손을 고려한 벡터제어)

  • Choi, Young-Tae;Lee, Deuk-Kee;Kim, Heung-Geun
    • Proceedings of the KIEE Conference
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    • 1997.07f
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    • pp.2217-2220
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    • 1997
  • To achieve the high performance speed control of synchronous permanent magnet motor, the influence of iron loss can not be negleced as the increase of driving frequency with high speed operation. This paper proposes a maximum efficiency control algorithm for permanent magnet synchonous motors by controlling the d-axis component of the armature current at any speed and torque. The objective of the optimum efficiency controller is to seek a combination of d-q axis current components which provide minimum input power (minimum losses) at a certain operating point by adding a small amout of perturbation to the d-axis current reference.

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A Study on Cogging Torque Reduction by Teeth Notching and Permanent Magnet offset in Surface-mounted Permanent Magnet Synchronous Motor (표면부착형 영구자석 동기전동기의 노치 및 영구자석 offset에 의한 코깅토크 저감 연구)

  • Kim, Tae-Woo;Chang, Jung-Hwan
    • Proceedings of the KIEE Conference
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    • 2011.07a
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    • pp.969-970
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    • 2011
  • 본 논문은 표면부착형 영구자석 동기전동기(Surfacemounted Permanent Magnet Synchronous Motor)의 영구자석 offset의 변화와 노치(notch)의 적용에 따른 코깅토크 저감 특성을 분석하고, 중심합성계획법(Central Composite Design)을 이용한 최적 모델 설계에 대한 연구이다. 영구자석 offset만 적용한 모델의 경우 코깅토크의 피크-피크값은 95%로 크게 저감되었지만 정격전류 인가시 평균토크의 감소율이 12.3%로 출력 손실이 크기 때문에 최적 설계를 통해 추가적으로 노치를 적용하고 영구자석 Offset을 조절함으로써 코깅토크 저감율을 96.5%로 개선시킬 수 있었고, 평균토크의 감소율은 7.7%로 영구자석 offset만 적용한 모델보다 평균토크의 감소량이 작아진 것을 확인할 수 있었다.

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Robust Digital Speed Control Scheme of Permanent Magnet Synchronous Motor (영구자석 동기전동기의 강인한 디지털 속도 제어기법)

  • Jung, Jin-Woo;Choi, Young-Sik
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.1
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    • pp.44-49
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    • 2011
  • This paper proposes a robust digital speed regulator for a surface-mounted permanent magnet synchronous motor(SPMSM). The proposed speed controller uses a simple digital load disturbance resistance scheme which does not require a load torque observer, so it can be easily and simply implemented without degrading the control performance. To validate the effectiveness of the proposed control algorithm, experimental results as well as simulation results are shown under motor parameter variations using a prototype SPMSM driving system. Finally, it was confirmed that the proposed method can precisely regulate the speed of the SPMSM.

Development of Inter Turn Short Fault Model of IPM Motor (IPM모터의 턴쇼트 고장모델에 관한 연구)

  • Gu, Bon-Gwan
    • The Transactions of the Korean Institute of Power Electronics
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    • v.20 no.4
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    • pp.305-312
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    • 2015
  • In this study, inter-turn short fault models of interior permanent magnet synchronous motors (IPMSM) are developed by adding saliency modeling to surface-mounted permanent magnet motor models. The saliency model is obtained using the deformed flux models based on both fault-winding flux information and inductance variations caused by cross-flux linkages that depend on the distribution of the same phase windings. By assuming the balanced three-phase current injection, we obtain the positive and negative sequence voltages and the fault current in the positive and the negative synchronous reference frames. The output torque model is developed by adding the magnet and the reluctance torque, which are derived from the developed models. To verify the proposed IPMSM model with an inter-turn short fault, finite element method-based simulation and experimental measurement results are presented.

Analysis and Modeling of Magnetic Characteristics in Surface-Mounted Permanent-Magnet Machines with Rotor Overhang

  • Yeo, Han-Kyeol;Woo, Dong-Kyun;Lim, Dong-Kuk;Ro, Jong-Suk;Jung, Hyun-Kyo
    • Journal of international Conference on Electrical Machines and Systems
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    • v.2 no.4
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    • pp.399-404
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    • 2013
  • The rotor overhang is used to enhance air-gap flux and improve power density. Due to asymmetry in the axial direction caused by the overhang, the time consuming 3D analysis is necessary to design the motor with overhang. To solve this problem, this paper proposes the equivalent magnetic circuit model (EMCM) that can consider overhang effects without the 3D analysis by using effective air-gap length. The analysis time can be reduced significantly via the proposed EMCM. The reduction of the analysis time is essential for the preliminary design of the motor. In order to verify the proposed model, the 3-D finite-element method (FEM) analysis is adopted. 3-D FEM results confirm the validity of the proposed EMCM.