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Shi-Uk Chung,Ji-Won Kim,Byung-Chul Woo,Do-Kwan Hong,Ji-Young Lee,Dae-Hyun Koo IEEE 2011 IEEE transactions on magnetics Vol.47 No.10
<P>Permanent magnet linear synchronous motor (PMLSM) has been successfully applied in various industry fields due mainly to excellent dynamic characteristics and accurate positioning capability. However, PMLSM suffers force ripple, which deteriorates controllability, and it is often considered to be an expensive linear drive mechanism since it requires a large amount of rare-earth permanent magnet (PM) material in the stationary part. This paper introduces and analyzes a new design of winding and mover arrangement for doubly salient permanent magnet linear synchronous motor (DSPMLSM). The proposed design reduces force ripples, magnetic unbalance, and the amount of PM material used in the stationary part. Extensive finite element analysis (FEA) reveals the effectiveness of the proposed design.</P>
Shi-Uk Chung,Ji-Won Kim,Yon-Do Chun,Byung-Chul Woo,Do-Kwan Hong IEEE 2015 IEEE transactions on energy conversion Vol.30 No.1
<P>This paper deals with a 44pole-48slot fractional slot concentrated winding permanent magnet synchronous machine (FSCW PMSM) for a low-speed direct drive. Two different rotor topologies, a surface permanent magnet (SPM) rotor and a consequent pole (CP) rotor, are optimized and compared both analytically and experimentally. The experimental results confirmed that an FSCW PMSM with a CP rotor can achieve almost equivalent performance at the rated state when compared to an FSCW PMSM with an SPM rotor with 33% less permanent magnet material.</P>
Chung, Shi-Uk,Chun, Yon-Do,Woo, Byung-Chul,Hong, Do-Kwan,Lee, Ji-Young The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.5
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.
Chung, Shi-Uk,Kim, Jong-Moo,Woo, Byung-Chul,Hong, Do-Kwan,Lee, Ji-Young 한국정밀공학회 2013 International Journal of Precision Engineering and Vol.14 No.12
This paper introduces a comprehensive approach to the development of doubly salient permanent magnet linear synchronous motor (DSPMLSM) including design, analysis, optimization, and experimental validation. Due to the proposed reduction design, force ripple caused by end-effect is dramatically reduced without any auxiliary teeth on both ends of mover. Response surface methodology (RSM) combined with 2D finite element analysis (FEA) is performed to maximize rated thrust. A prototype was made based on the analysis and tested to confirm the validity of the analysis. The comparison between analysis and experiment shows an excellent agreement. Controllabilty of the prototype is also examined to show applicability in general-purpose automation applications. It is experimentally shown that the proposed DSPMLSM topology successfully achieve high acceleration, high speed, and high precision positioning capability.
Development of a 20-Pole–24-Slot SPMSM With Consequent Pole Rotor for In-Wheel Direct Drive
Chung, Shi-Uk,Moon, Seok-Hwan,Kim, Dong-Jun,Kim, Jong-Moo Institute of Electrical and Electronics Engineers 2016 IEEE transactions on industrial electronics Vol.63 No.1
<P>In-wheel motors bring a fundamental change in electric vehicle technology by removing conventional mechanical components and freeing up space inside the vehicle body. This approach ultimately helps to realize all-wheel independent control for improved vehicle dynamics and increased vehicle design freedom. However, when space allowed for an in-wheel motor is taken into consideration, high torque density, high efficiency, and widespeed- range capability are typically required. This paper specifically investigates a 20-pole-24-slot surface permanent magnet synchronous motor with consequent pole rotor for in-wheel direct drive since this topology is well suited for high-pole motors and thus high-torque directdrive applications. Extensive finite-element analysis is carried out to characterize the proposed motor, and the practical feasibility of the proposed motor is discussed. Finally, the validity of the analysis was experimentally verified.</P>
Chung, Shi-Uk,Chun, Yon-Do,Moon, Seok-Hwan The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.5
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.
Shi-Uk Chung,Yon-Do Chun,Byung-Chul Woo,Do-Kwan Hong,Ji-Young Lee 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.5
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.
Shi-Uk Chung,Yon-Do Chun,Seok-Hwan Moon 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.5
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.
Shi-Uk Chung,Jong-Moo Kim Institute of Electrical and Electronics Engineers 2016 IEEE transactions on industrial electronics Vol.63 No.5
<P>This paper analytically and experimentally shows effectiveness and simplicity of mover teeth arrangement design, which dramatically reduces detent force and consequently speed ripple at low speed. For this purpose, this paper describes two design steps that include the conventional magnetic circuit optimization by response surface methodology (RSM) and a slight modification of the optimized model based on the proposed mover teeth arrangement. Two prototypes were fabricated, tested, and compared from various perspectives. It was experimentally confirmed that the proposed design is very effective in reduction of detent force and speed ripple with the least sacrifice of performance.</P>
Shi Uk Chung,Yon-Do Chun,Seok-Hwan Moon 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.5
This corrects the article "Analysis and Experimental Characterization of Low Speed Direct Drive Fractional Slot Concentrated Winding Surface Permanent Magnet Synchronous Motor with Consequent Pole Rotor" in volume 10, No. 5 on page 2058.