• Title, Summary, Keyword: Consequent pole

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Design and Analysis of a Material Efficient Sinusoidal Consequent-Pole High-Speed Axial-Flux Machine

  • Kumar, Sunil;Kwon, Byung-il
    • Journal of IKEEE
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    • v.22 no.3
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    • pp.759-766
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    • 2018
  • This paper presents a high-speed axial-flux machine which utilizes the idea of sinusoidal shaped pole combined with a consequent iron-pole. The target of the proposed machine is the cost reduction of the relatively expensive Samarium-Cobalt (SmCo) permanent magnet (PM) material and the torque per PM volume improvement by using sinusoidal consequent-pole rotor. The effectiveness of the proposed machine is validated by comparing it with conventional consequent-pole and with conventional PM machines using 3-D finite element method (FEM) simulations. The comparison and analysis is done in terms of back electro-motive force (back-EMF) harmonic contents, torque per PM volume and torque ripple characteristics. The simulation results show that the proposed machine is suitable and cost-effective for high-speed and high torque per PM volume applications. Furthermore, due to the consequent pole, the magnetic flux saturation and the overload current torque-capability are also presented and discussed in the paper.

The Design and Characteristics Comparison of 600W Class Consequent Pole Type IPMSM (600W급 Consequent Pole Type IPMSM 설계 및 특성 비교)

  • Gim, Gyu-Hwa;Park, Byung-Jun;Kim, Yongn-Tae;KimJang, Gyu-Tak
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.8
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    • pp.1040-1046
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    • 2018
  • The Permanent Magnet Synchronous Motor(PMSM) has various advantages. However, new types of research have been carried out because of rising prices of materials for rare earth magnets used in PMSM and also unstable supply. In this paper, we propose Consequent Pole(CP) type IPMSM for magnet reduction. The shape of CP type IPMSM stator was same with Basic model IPMSM. The design of the rotor shape was proceeded that CP type IPMSM achieved the same output as the basic model IPMSM. Finally, the selected model and IPMSM were compared and discussed.

Design Considerations and Validation of Permanent Magnet Vernier Machine with Consequent Pole Rotor for Low Speed Servo Applications

  • Chung, Shi-Uk;Chun, Yon-Do;Woo, Byung-Chul;Hong, Do-Kwan;Lee, Ji-Young
    • Journal of Electrical Engineering and Technology
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    • v.8 no.5
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    • pp.1146-1151
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    • 2013
  • This paper deals with design consideration and validation of a new pole-slot combination for permanent magnet vernier machine (PMVM) with consequent pole (CP) rotor especially for extremely low speed servo applications. A 136pole-24slot PMVM with CP rotor is introduced and analyzed by 2D and 3D finite element analysis (FEA) and discussion on experimental validation is also included.

Analysis and Experimental Characterization of Low Speed Direct Drive Fractional Slot Concentrated Winding Surface Permanent Magnet Synchronous Motor with Consequent Pole Rotor

  • Chung, Shi-Uk;Chun, Yon-Do;Moon, Seok-Hwan
    • Journal of Electrical Engineering and Technology
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    • v.10 no.5
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    • pp.2057-2061
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    • 2015
  • This paper describes analysis and experimental characterization of low speed direct drive fractional slot concentrated winding (FSCW) surface permanent magnet synchronous motor (SPMSM) with consequent pole (CP) rotor, for which studies have been recently performed. The proposed motor, which consists of 30 poles and 36 slots, is analyzed and characterized by extensive 2D finite element analysis (FEA) and together with 3D FEA for an appropriate PM overhang length design. The validity of the analysis is confirmed by the corresponding experiments which fully characterize the proposed motor with excellent agreement between the FEA and the experiments. Thermal stability is also experimentally examined to determine continuous operating points and instantaneous operating points of the proposed motor. It is highly expected that the proposed motor is applicable for low speed direct drive applications.

Design technique of fuzzy controller using pole assignment method and the stability analysis of the system

  • Cho, Young-Wan;Noh, Heung-Sik;Ki, Seung-Woo;Park, Mignon-
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.1090-1093
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    • 1993
  • In this paper, the design technique of fuzzy controller using pole placement method and the stability analysis of the system are discussed. The consequent parts of the fuzzy model representing the fuzzy control system are descrived by linear stated equations. It cannot be guaranteed that the total fuzzy system is stable even if all subsystems are stable. The range of the consequent parameters of fuzzy feedback controller which is stable for each fuzzy subspace of the input space are derived, using a rather simplified stability criterion. Then, the consequent parameters of fuzzy controller is determined with the sufficient condition that the fuzzy feedback controller maintain robust stability for the model of other subspace.

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Rotor Position Detection of CPPM Belt Starter Generator with Trapezoidal Back EMF using Six Hall Sensors

  • Xu, Jiaqun;Long, Feng;Cui, Haotian
    • Journal of Magnetics
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    • v.21 no.2
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    • pp.173-178
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    • 2016
  • Six-step commutation control widely used in brushless DC (BLDC) motor can be applied to consequent pole permanent magnet (CPPM) belt starter generator (BSG) with trapezoidal back electromotive force (EMF) in the starter state. However, rotor position detection with three Hall sensors in BLDC motor can hardly be employed in CPPM BSG due to asymmetric flux distribution in each pole side of CPPM BSG. This paper presents a low-cost rotor position detection method for CPPM BSG in which six Hall sensors are proposed to be used based on the analysis of flux distribution by 3D FEA. In the method, the six Hall sensors are divided into three groups and two signals in each group are combined through performing logic operations. In addition, offset angle between back EMF and the related Hall signal can be compensated by moving the Hall sensors. Experiments of a 2 kW CPPM BSG prototype have also been performed to verify the proposed method.

A Self-teaming Fuzzy Logic Controller using Fuzzy Neural Network (퍼지 신경망을 이용한 자기학습 퍼지논리 제어기)

  • Lee, Woo-Young
    • Proceedings of the KIEE Conference
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    • pp.211-213
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    • 1993
  • In this paper, we proposed a design method of self-learning fuzzy logic controller using fuzzy neural network. The parameters of membership function in premise are modified by descent method and also consequent parameters by learning mechanism of animal conditioning theory. The proposed method is applied to pole balancing system in order to confirm the feasibility.

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