Electromagnetic Normal Force Characteristics of a Permanent Magnet Linear Synchronous Motor with Double Primary Side

Abstract

The large normal force of the permanent magnet linear synchronous motor (PMLSM) is caused by the PM group shifting. This is the significant drawback which will deteriorate the performance of the drive system in high-precision applications. In the optimization design process, when the PM group shifting length is not zero the normal force will be changed into a pulsation curve with large amplitude. To solve this problem, this paper proposes that the PMLSM is divided into two symmetrical PMLSMs. The effectiveness of this proposed structure is verified by the simulation and experiment according to the comparison of the electromagnetic force characteristics between the conventional and proposed structures.Index Terms-Detent force, normal force, permanent magnet linear synchronous motor (PMSLM), thrust force.

Optimal design of permanent magnet linear synchronous motors based on Taguchi method

“…In the PMLSM optimisation design, DOE can be used to explore the effects of various structure parameters on motor thrust and thrust ripple [29]. The method proposed in this paper is one of DOE, which is commonly known as Taguchi optimisation method; this method is one of those that use orthogonal array to screen the experimental conditions and means [30], the advantage of this method is that it uses the least experimental data based on the number of factors and levels in factor parameter space to achieve the best combination of parameter design and optimal results. Four undetermined factors exist, namely, h , δ , τ , and d , and each factor has three levels [31].…”

Optimal Design of Electromagnetic Force of Hidden—Pole Magnetic Suspension Linear Motor

“…In Ansoft, the x-axis negative direction is the motion direction of the platform, and the positive direction of the y-axis is the floating direction. The two motor models are respectively divided, and the boundary conditions are set and solved [26]. Figure.…”

Detent Force Reduction of an Arc-Linear Permanent-Magnet Synchronous Motor by Using Compensation Windings

“…The result shows that without optimization, the detent force caused by the end effect is much higher than that caused by the slot effect. The ways to reduce the detent force can be classified into two kinds, one is the sophisticated control strategies of the machines [13][14][15][16], and the other is the optimization of the machine structure [17][18][19][20][21][22][23][24][25], as shown in Fig. 1.…”

“…[18] analyzed the influence of the primary side length on the detent force, and indicated that the detent force can be greatly reduced by optimization of the length. [19] developed a multiple secondary side PMLSM to reduce the detent force, while [20] developed a multiple primary side PMLSM to reduce the detent force. Auxiliary poles or auxiliary teeth are also widely used to reduce the detent force [21][22][23][24].…”