Optimal Design of Reformed Auxiliary Teeth for Reducing End Detent Force of Stationary Discontinuous Armature PMLSM

Kim, Sungjin; Park, Eui-Jong; Jung, Sang-Yong; Kim, Yong-Jae

doi:10.1109/tasc.2016.2527725

Cited by 17 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to eliminate the detent force harmonics as much as possible, it is necessary to ensure that the initial phase difference of the three sine functions in formula (14)- (17) should be (2π/3)+2kπ (k is an integer) and the initial phase difference of the three cosine functions should be (2π/3)+2kπ in formula (18)-(21) (k is an integer). Since the initial phases of formula (14)- (17) and formula (18)- (21) are the same respectively, there is an optimal size of SDAP, which makes the fluctuation of thrust and normal force minimum at the same time.…”

Section: ) the Optimal Size Of Sdapmentioning

confidence: 99%

See 1 more Smart Citation

Research on the Method of Suppressing the End Detent Force of Permanent Magnet Linear Synchronous Motor Based on Stepped Double Auxiliary Pole

Zhang

Huang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

Permanent magnet linear synchronous motors have the advantages of high thrust density, high acceleration, high speed, and high efficiency, which are widely used in CNC lathes, lithography machines, rail transportation, etc. In high-speed, high-precision servo control systems, detent force fluctuation caused by end effect can easily cause problems such as speed fluctuation, mechanical vibration and electromagnetic noise, which affect the servo performance of permanent magnet linear synchronous motors. Aiming at the detent force fluctuation caused by the end effect of permanent magnet linear synchronous motor, this paper proposes a stepped double auxiliary pole method. The method has a good suppression effect on the end normal force fluctuation and the end thrust fluctuation, which improves the servo performance of the permanent magnet linear synchronous motor in the high-precision servo system. In the traditional methods of suppressing the fluctuation of end detent force, two common methods are using a magnetic isolation aluminum plate and optimizing the auxiliary pole size. The former needs a magnetic isolation aluminum plate to connect the auxiliary pole and the primary mover. Therefore, it needs to add the connection device to connect those three parts. The connection device complicates the auxiliary pole part and increases manufacturing difficulty. The latter does not change the manufacturing process, but in the early design process, the optimum size of the auxiliary needs to be considered. Compared with these two methods, the one proposed in this paper avoids the complex structure of magnetic isolation aluminum plate, the stepped double auxiliary pole is integrated with the primary mover. Moreover, it has a fixed structure with optimum size. Therefore, the method in the paper does not change the manufacturing process, improves the strength of the initial pole structure, and reduces design period. Finally, the finite element analysis by ANSYS was performed to illustrate the correctness and effectiveness of the method.

show abstract

Section: ) the Optimal Size Of Sdapmentioning

confidence: 99%

“…A. Boduroglu, SJ Kim, KH Shin, etc. proposed that changing the size and shape of the primary end teeth or auxiliary pole can effectively suppress the detent force fluctuation caused by end effect [13][14][15][16][17]. But the optimal size and shape need to be designed.…”

Section: Introductionmentioning

confidence: 99%

Research on the Method of Suppressing the End Detent Force of Permanent Magnet Linear Synchronous Motor Based on Stepped Double Auxiliary Pole

Zhang

Huang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

show abstract

“…In order to simplify the analysis process, the three-dimensional model is reasonable. Assuming that the calculation is simplified for a two-dimensional model, the following assumptions can be made [11]- [13]:…”

Section: A Air Gap Magnetic Field Analysismentioning

confidence: 99%

Sensorless Vector Control of Permanent Magnet Synchronous Linear Motor Based on Self-Adaptive Super-Twisting Sliding Mode Controller

Zhou

et al. 2019

IEEE Access

View full text Add to dashboard Cite

Due to its own structural characteristics, permanent magnet synchronous linear motors (PMSLMs) have unstable motor parameters during operation due to the end effect and the inherent magnetic circuit instability. At the same time, linear motors have the characteristics of reciprocating switching motion and high-speed positioning motion in industrial applications, thus placing high demands on the controller. In order to improve the performance of the PMSLM, this paper firstly studies the linear motor structure, the distribution characteristics of its air gap magnetic field are obtained, and the simulation analysis for the back electromotive force (EMF) of PMSLM of its running process is carried out. Then, a state observer based on the sliding mode state observer (SMO) is built to replace the traditional speed sensor and a super-twisting sliding mode controller is designed. The double-closed loop control of the speed and the use of high-order sliding mode control features effectively reduce the chattering of the system and reduce the impact of the observation error brought by the observer on the system. The adaptive sliding mode control strategy is used to effectively suppress the influence of the boundaryless uncertainty interference on the system and reduce the influence of the observation error brought by the observer on the system. This paper also combines the linear motor experimental platform to further verify the control scheme based on the super-twisting sliding mode non-sensing linear motor. The simulation and experimental results show that SMO has accurate speed and position tracking performance, the system's chattering is significantly reduced, the control precision is excellent, and the introduction of adaptive sliding mode controller enhances the robustness of the system.

show abstract

“…The previous research related to the detent force reduction in the LPMM has focused on the addition of an auxiliary tooth and PM skew [ 4 , 5 , 6 ]. Seo et al [ 7 ] and Kim et al [ 8 ] proposed adding an auxiliary tooth to reduce the detent of the LPMM and adjusted its thickness and position. Although the detent force is reduced due to the auxiliary tooth, the air-gap magnetic flux distribution is distorted [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Fast Design Optimization and Comparative Analysis for Linear Permanent Magnet Motor with Magnet Skew, Auxiliary Tooth and Overhang Structure

Kim

Woo

2022

Sensors

View full text Add to dashboard Cite

This paper presents a fast design optimization using an effective characteristic analysis for linear permanent magnet motors (LPMMs) with techniques for improving motor performance such as using an auxiliary tooth, permanent magnet (PM) skew, and overhang structures. These techniques have different effects on the characteristics of the LPMM depending on the combinations of each other, resulting in complexity in the design optimization process. In particular, the three-dimensional (3-D) effect of the PM skew and overhang structure takes a lot of time to be analyzed. To deal with this problem, an effective magnetic field analysis method and a novel optimization algorithm are proposed. Preferentially, the field reconstruction method is used for a fast and accurate evaluation of the magnetic field of the LPMM. In the proposed magnetic field analysis method, the change of magnetic field distribution due to the addition of an auxiliary tooth is predicted, and the 3-D magnetic field effect of PM skew and overhang structure is considered. By reducing the computational burden in the magnetic field analysis, the electromagnetic characteristics of LPMMs can be calculated quickly, such as detent force, end force, thrust force, and back-EMF. The effect of the auxiliary tooth and overhang structure on the optimal PM skew length is investigated with comparative study results. Subsequently, the proposed optimization algorithm has the advantage of reducing time cost by providing multimodal optimization and robustness evaluation of local peaks at the same time. The proposed method is verified via comparison with finite element analysis and experimental results.

show abstract

Optimal Design of Reformed Auxiliary Teeth for Reducing End Detent Force of Stationary Discontinuous Armature PMLSM

Cited by 17 publications

References 5 publications

Research on the Method of Suppressing the End Detent Force of Permanent Magnet Linear Synchronous Motor Based on Stepped Double Auxiliary Pole

Research on the Method of Suppressing the End Detent Force of Permanent Magnet Linear Synchronous Motor Based on Stepped Double Auxiliary Pole

Sensorless Vector Control of Permanent Magnet Synchronous Linear Motor Based on Self-Adaptive Super-Twisting Sliding Mode Controller

Fast Design Optimization and Comparative Analysis for Linear Permanent Magnet Motor with Magnet Skew, Auxiliary Tooth and Overhang Structure

Contact Info

Product

Resources

About