Limited motion rotary actuators of the toroidal-stator, permanent-magnet rotor type

1982 ◽  
Vol 129 (4) ◽  
pp. 190 ◽  
Author(s):  
C. Dawson ◽  
H.R. Bolton
Keyword(s):  
Permanent Magnet ◽  
Rotor Type ◽  
Limited Motion

scholarly journals Iron Loss Analysis of a Concentrated Winding Type Interior Permanent Magnet Synchronous Motor with Single and Dual Layer Magnet Shape

Machines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 74
Author(s):  
Chan-Ho Baek ◽  
Hyo-Seob Shin ◽  
Jang-Young Choi
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Homogenization Method ◽  
Iron Loss ◽  
Frequency Separation ◽  
Permanent Magnet Synchronous Motors ◽  
Loss Analysis ◽  
Iron Losses ◽  
Interior Permanent Magnet ◽  
Rotor Type

In this study, the iron losses of high flux density concentrated winding-type interior permanent magnet synchronous motors for three different magnet shapes (single-V, single-flat, and dual-delta) and rotor structures are analyzed and compared. Iron loss is analyzed using the classical Steinmetz equation (CSE) based on the frequency separation approach using the iron loss material table, and each rotor type is compared. In addition, to validate the hysteresis loss for each rotor type, two additional analyses are performed. In the methods considered, the number of minor loops is counted, and the area is calculated based on DC bias. The eddy current loss is compared using two approaches: CSE base frequency separation and the homogenization method considering the skin effect. This study primarily focuses on the comparison of relative iron losses based on different rotor topologies instead of absolute comparisons.

Design and Investigation of Outer Rotor Permanent Magnet Flux Switching Machine for Downhole Application

2017 ◽  
Vol 8 (1) ◽  
pp. 231 ◽  
Author(s):  
Rajesh Kumar ◽  
Erwan Sulaiman ◽  
Mahyuzie Jenal ◽  
Laili Iwani Jusoh ◽  
Fatihah Shafiqah Bahrim
Keyword(s):  
Permanent Magnet ◽  
Joint Venture ◽  
Research Work ◽  
Research Topic ◽  
Permanent Magnet Synchronous Machine ◽  
Reluctance Machine ◽  
Outer Rotor ◽  
Rotor Structure ◽  
Power Densities ◽  
Rotor Type

Permanent magnet flux switching machine (PMFSM) is a joint venture of switch reluctance machine (SRM) and permanent magnet synchronous machine (PMSM). It has become a prominent research topic for various applications because of robust rotor structure, high torque and power densities but few were developed for downhole applications mainly due to harsh environmental conditions. Formerly, most of developed PMFSMs for downhole applications were mainly concentrated on inner-rotor type design, and difficult to find research work on outer-rotor configuration. Therefore, this paper introduces the design and investigation of PMFSM with outer-rotor configuration for downhole application. Primarily, the geometric topology of proposed design is described in detail. Then, the no load and load analysis are implemented in order to investigate the initial performance of the proposed design.

scholarly journals Performance Analysis of Synchronous Reluctance Motor with Limited Amount of Permanent Magnet

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3504 ◽  
Author(s):  
Ngo ◽  
Hsieh
Keyword(s):  
Performance Analysis ◽  
Permanent Magnet ◽  
Motor Performance ◽  
High Performance ◽  
Field Weakening ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
Rotor Flux ◽  
Rotor Type

This paper analyzes the performance of a synchronous reluctance motor (SynRM) equipped with a limited amount of a permanent magnet (PM). This is conventionally implemented by inserting PMs in rotor flux barriers, and this is often called the PM-assisted SynRM (PMa-SynRM). However, common PMa-SynRMs could be vulnerable to irreversible demagnetization. Therefore, motor performance and PM demagnetization should be simultaneously considered, and this would require the PM to be properly arranged. In this paper, various rotor configurations are carefully studied and compared in order to maximize the motor performance, avoid irreversible demagnetization and achieve higher PM utilization. Moreover, the field weakening capability is investigated and improved by regulating armature excitation. A particular rotor type with flux intensification was found to possess higher PM utilization, lower demagnetization possibility with fairly high performance. Thus, suitable rotor configurations are recommended for certain applications.

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