Characteristic Analysis of the Influence of Auxiliary Teeth and Notching on the Reduction of the Detent Force of a Permanent Magnet Linear Synchronous Machine

Seo, Sunae; Jang, Gang-Hyeon; Koo, Min-Mo; Choi, Jang-Young

doi:10.1109/tasc.2018.2796586

Cited by 20 publications

(14 citation statements)

References 9 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%

“…Taking formula (14)- (17) as an example, it is necessary to ensure that the initial phase difference of the three sine functions in f1(x), f2(x), f3(x) and f4(x) should be (2π/3)+2kπ (k is an integer). It can be seen from the physical model that a, b and c are all positive numbers, and c>b.…”

Section: ) the Optimal Size Of Sdapmentioning

confidence: 99%

“…Comparing formula (26) with formula (14)- (17), it can be found that there are only 3 times harmonics left in the thrust harmonics of each end face. The other harmonic components are suppressed, and the main principle is: each group of end faces contains three different-position end faces, whose positions ensure that the initial phase difference of the same order harmonic component (except the multiple harmonic component of 3) generated by each end face is 120 °, so as to achieve cancel each other out.…”

Section: ) Principle Of Thrust Fluctuation Suppressionmentioning

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%

See 3 more Smart Citations

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%

Section: ) the Optimal Size Of Sdapmentioning

confidence: 99%

Section: ) Principle Of Thrust Fluctuation Suppressionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

“…Unfortunately, in most of these types of machines when the phases are not energized a detent force appears because of the interaction between the permanent magnets and the poles or teeth in which the windings are disposed of. Different techniques have been proposed for the reduction in detent force, the most usual are aside PM skewing and PM length/width adjustment [4,5], an asymmetric arrangement of PM, use of semi-closed slots [6], and utilization of auxiliary teeth or teeth notching [7]. Some other techniques use specific control strategies [8], in some cases, a combination of control and Energies 2020, 13, 5162 2 of 16 structural design (e.g., skewing PM, Halbach array) are employed [9,10], and others are based on the shift of the permanent magnets, poles and slots, the slots or poles and the distance between the magnet segments of each pole [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Two-Phase Linear Hybrid Reluctance Actuator with Low Detent Force

et al. 2020

View full text Add to dashboard Cite

In this paper, a novel two-phase linear hybrid reluctance actuator with the double-sided segmented stator, made of laminated U cores, and an interior mover with permanent magnets is proposed. The permanent magnets are disposed of in a way that increases the thrust force of a double-sided linear switched reluctance actuator of the same size. To achieve this objective, each phase of the actuator is powered by a single H-bridge inverter. To reduce the detent force, the upper and the lower stator were shifted. Finite element analysis was used to demonstrate that the proposed actuator has a high force density with low detent force. In addition, a comparative study between the proposed linear hybrid reluctance actuator, linear switched reluctance, and linear permanent magnet actuators of the same size was performed. Finally, experimental tests carried out in a prototype confirmed the goals of the proposed actuator.

show abstract

Detent Force Reduction in Permanent Magnet Linear Synchronous Motor Base on Magnetic Field Similarity Method

et al. 2019

View full text Add to dashboard Cite

Permanent-magnet linear synchronous motors (PMLSMs) have been widely used in various industries. However, the inherent detent force of these motors limits their application range, especially in high-precision motion and low-speed systems. In this study, magnetic field similarity (MFS) method and edgy teeth-shape optimization are proposed to reduce the detent force. First, an equivalent model of the PMLSM is established wherein the end effect is initially taken into consideration, and the parameters, such as reluctance, energy, and detent force, are calculated. Second, the principle of the MFS is introduced, and the main parameters that affect the detent force are obtained. The detent force is studied and analyzed using parametric analysis, and the shape of the edgy teeth is optimized by particle swarm optimization. The simulation verifies the correctness and applicability of the proposed method. Finally, a prototype is fabricated and the experimental results verify the validity of the mathematical model and simulation results.INDEX TERMS Magnetic field similarity, equivalent magnetic circuit, finite element analysis, tubular permanent magnet linear generator, particle swarm optimization.

show abstract

Characteristic Analysis of the Influence of Auxiliary Teeth and Notching on the Reduction of the Detent Force of a Permanent Magnet Linear Synchronous Machine

Cited by 20 publications

References 9 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

Two-Phase Linear Hybrid Reluctance Actuator with Low Detent Force

Detent Force Reduction in Permanent Magnet Linear Synchronous Motor Base on Magnetic Field Similarity Method

Contact Info

Product

Resources

About