A novel flux switching claw pole machine with soft magnetic composite cores

2021 ◽  
pp. 1-21
Author(s):  
Chengcheng Liu ◽  
Qainyu Liu ◽  
Shaopeng Wang ◽  
Youhua Wang ◽  
Gang Lei ◽  
...  
Keyword(s):  
High Frequency ◽  
Permanent Magnets ◽  
Core Loss ◽  
Torque Ripple ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
The Core ◽  
Soft Magnetic Composite ◽  
Torque Coefficient ◽  
3D Finite Element Method

This paper proposes a novel flux switching claw pole machine (FSCPM) with soft magnetic composite (SMC) cores. The proposed FSCPM holds advantages of the conventional flux switching permanent magnet machine (FSPMM) and claw pole machine (CPM) with SMC cores. As permanent magnets are installed between the stator claw pole teeth, FSCPM has good flux concentrating ability, and the air gap flux density can be significantly improved. The torque coefficient of FSCPM is relatively high due to the applied claw pole teeth and global winding. FSCPM is mechanically robust because there are no windings or PMs on its rotor. Moreover, the core loss of FSCPM is relatively low for the SMC material has lower core loss at high frequency compared with silicon steels. The topology and operational principle of FSCPM are explained first. Several main dimensions of the machine are optimized to achieve better performance, based on 3D finite element method (FEM). Furthermore, the rotor skewing technology is adopted to reduce the cogging torque and torque ripple.

scholarly journals Design Issues for Claw Pole Machines with Soft Magnetic Composite Cores

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1998 ◽  
Author(s):  
Chengcheng Liu ◽  
Jiawei Lu ◽  
Youhua Wang ◽  
Gang Lei ◽  
Jianguo Zhu ◽  
...  
Keyword(s):  
Special Kind ◽  
Magnetic Composite ◽  
Design Issues ◽  
Soft Magnetic ◽  
Torque Density ◽  
Soft Magnetic Composite ◽  
Torque Coefficient ◽  
3D Finite Element Method ◽  
Consequent Pole ◽  
Machine Analysis

By using global ring winding, the torque coefficient of the transverse flux machine (TFM) is proportional to its number of pole pairs, and thus the TFM possesses high torque density ability when compared with other electrical machines. As a special kind of TFM, the claw pole machine (CPM) can have more torque due to its special claw pole teeth. The manufacturing of CPM or TFM with silicon steels was very difficult in the past, and is a handicap for the progress of this kind of machine. Thanks to the advent of soft magnetic composite (SMC) materials, the manufacturing process of CPM has become more and more simple. More attention has been paid to this kind of technology, and some mass production CPMs with SMC cores have appeared. However, there are few works that discuss the key design issues for this kind of machine. In this paper, a small CPM with SMC is used as as a research benchmark. Various design methods that can be adopted to improve its performance have been studied, including unequal stator claw pole teeth, a skewing magnet design, consequent pole design, and etc. The 3D finite element method (FEM) is used for the machine analysis, and it is verified by the experimental results of a CPM with SMC cores.

Influence of Heat Treatment Processing on the Magnetic Properties of Fe-3.5Si Soft Magnetic Composites in Material Application

2012 ◽  
Vol 578 ◽  
pp. 206-210
Author(s):  
Yuan Dong Peng ◽  
Zhi Yue Sun ◽  
Jun Wu Nie ◽  
Wen Jun Zhang ◽  
Zeng Guang Mao ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Core Loss ◽  
Treatment Temperature ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
The Core ◽  
Soft Magnetic Composite ◽  
Eddy Loss

In this paper, the effect of heat treatment processing on magnetic properties of Fe-3.5Si soft magnetic composite has been investigated. The thermal treatment improved the magnetic properties of Fe-3.5Si SMC materials. With the treatment temperature increasing, the permeability and eddy loss of the composites increase and the core loss and hysteresis loss decrease. The magnetic properties would be deteriorated at too high temperature. Annealed temperature at 750°C for 60min, the Fe-3.5Si soft magnetic composite has the optimum overall magnetic properties.

scholarly journals Robust Design of a Low-Cost Permanent Magnet Motor with Soft Magnetic Composite Cores Considering the Manufacturing Process and Tolerances

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2025 ◽  
Author(s):  
Chengcheng Liu ◽  
Gang Lei ◽  
Bo Ma ◽  
Youguang Guo ◽  
Jianguo Zhu
Keyword(s):  
Robust Design ◽  
Manufacturing Process ◽  
Low Cost ◽  
Core Loss ◽  
Optimization Method ◽  
Magnetic Composite ◽  
Permanent Magnet Motor ◽  
Soft Magnetic ◽  
The Core ◽  
Soft Magnetic Composite

This paper uses the Taguchi method to optimize the manufacturing process and robust design of a low-cost permanent magnet motor with soft magnetic composite (SMC) cores. For the manufacturing process, SMC cores are produced by using the molding technology without any wire cutting costs. To maximize the relative permeability and minimize the core loss, the Taguchi method is employed to identify the best control factor values for the heat treatment of SMC cores based on a series of experimental results. Due to the manufacturing tolerances, there are significant uncertainties in the core densities and motor dimensions, which will result in big performance variations for the SMC motors in the batch production. To obtain a robust design less sensitive to these tolerances, the conventional Taguchi parameter design method and a sequential Taguchi optimization method are presented to maximize the average torque and minimize the core loss of a low-cost PM motor. Through comparison, it is found that the proposed optimization method is efficient. It can provide an optimal design with better motor performance and manufacturing quality. The proposed method will benefit the industrial production of cost-effective PM-SMC motors with robust and compact designs.

Intergranular insulated Fe/SiO 2 soft magnetic composite for decreased core loss

2016 ◽  
Vol 27 (4) ◽  
pp. 1189-1194 ◽  
Author(s):  
Jian Wang ◽  
Xi’an Fan ◽  
Zhaoyang Wu ◽  
Guangqiang Li
Keyword(s):  
Core Loss ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Soft Magnetic Composite

scholarly journals Investigation of an Inset Micro Permanent Magnet Synchronous Motor Using Soft Magnetic Composite Material

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4445
Author(s):  
Da-Chen Pang ◽  
Zhen-Jia Shi ◽  
Pei-Xuan Xie ◽  
Hua-Chih Huang ◽  
Gia-Thinh Bui
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Silicon Steel ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Tile Type ◽  
Torque Density ◽  
Soft Magnetic Composite

This paper presents the world’s smallest inset permanent magnet synchronous motor (PMSM) with a soft magnetic composite (SMC) core, providing ease of manufacturing for micromachine applications without silicon steel laminations. The inset motor can offer an additional reluctance torque and higher torque density with a lower usage amount of permanent magnet. A 15 mm diameter inset motor was developed with the thickness of a tile-type permanent magnet which is limited to 1 mm by the manufacturer. The motor was designed with high torque density and low torque ripple by varying the interpole iron width for the rotor. Two inset motors were made using both SMC and silicon steel materials for comparison. The performance of the SMC motor was inferior to the silicon steel motor, but it still meets the specifications of the commercial market. If the thickness of the tile-type permanent magnet is further reduced, the micro inset motor with a SMC core can be easily mass-manufactured using powder sintering.

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