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Control Based Reduction of Detent Force for Permanent Magnet Linear Synchronous Motor
Yu-wu Zhu(주옥오),Yun-hyun Cho(조윤현) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
The detent force of the permanent magnet linear synchronous motor (PMLSM) is caused by the interaction between the permanent magnet and the iron core of the mover without input current. It is a function of the mover position relative to the stator. This paper proposes a control based method to reduce the detent force for the PMLSM. This detent force that can be predicted by finite element method (FEM) is compensated by injecting the instantaneous current using the field oriented control (FOC) method. Both the simulated and experimental results are reported to validate the effectiveness of this proposed method.
PMLSM의 추력 리플 저감을 위한 DSP기반 디지털 제어기의 설계
진상민(Sang-Min Jin),주옥오(Yu-Wu Zhu),김도선(Do-Sun Kim),조윤현(Yun-Hyun Cho) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.4
Thrust ripples in Permanent Magnet Linear Motor(PMLSM) are mainly generated by cogging force. Cogging force caused by the interaction between the iron core and the Permanent Magnet(PM), and end effect. This paper has proposed a control method for thrust ripples suppression and design of one-chip proceeding digital controller using TMS320LF2407. This control method is realized by Field Oriented Control(FOC) adding to current compensation. The effectiveness of proposed control method is verified by experimentation comparing between the compensation and non-compensation.
A Selection of PM-LSM Topology Structure for Ropeless Elevator System
Sang-Min Jin(진상민),Koon-Seok Chung(정군석),Yu-wu Zhu(주옥오),Yun-hyun Cho(조윤현) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
One of the most important technical improvement required for ropeless elevator system to become practical is the improvements in overall system efficiency. Moreover, the predominant drawback of permanent magnet (PM) linear synchronous motor (LSM) is large detent force. Therefore, for the given volume the selection of high power density PM-LSM with low detent force is very imperative. In this paper, we will investigate the characteristics of thrust and detent force of PM-LSM under different motor topology structure. Finally, the long stator double-sided iron core type PM-LSM with fractional slot winding is the best choice for the ropeless elevator system.