scholarly journals A Review of Transverse Flux Machines Topologies and Design

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7173
Author(s):  
Víctor Ballestín-Bernad ◽  
Jesús Sergio Artal-Sevil ◽  
José Antonio Domínguez-Navarro
Keyword(s):  
Power Systems ◽  
Prime Mover ◽  
Variable Speed ◽  
Direct Drive ◽  
Comprehensive Review ◽  
Potential Applications ◽  
High Torque ◽  
Transverse Flux ◽  
Drive Systems ◽  
Load Variable

High torque and power density are unique merits of transverse flux machines (TFMs). TFMs are particularly suitable for use in direct-drive systems, that is, those power systems with no gearbox between the electric machine and the prime mover or load. Variable speed wind turbines and in-wheel traction seem to be great-potential applications for TFMs. Nevertheless, the cogging torque, efficiency, power factor and manufacturing of TFMs should still be improved. In this paper, a comprehensive review of TFMs topologies and design is made, dealing with TFM applications, topologies, operation, design and modeling.

scholarly journals Control of a Direct-Drive Arm

1983 ◽  
Vol 105 (3) ◽  
pp. 136-142 ◽  
Author(s):  
H. Asada ◽  
T. Kanade ◽  
I. Takeyama
Keyword(s):  
Drive System ◽  
Direct Drive ◽  
Excellent Performance ◽  
Mechanical Stiffness ◽  
Feedback Controllers ◽  
Transmission Mechanisms ◽  
Single Link ◽  
High Torque ◽  
Drive Systems ◽  
Speed And Accuracy

A direct-drive arm is a mechanical arm in which the shafts of articulated joints are directly coupled to the rotors of motors with high torque. Since the arm does not contain transmission mechanisms between the motors and their loads, the drive system has no backlash, small friction, and high mechanical stiffness, all of which are desirable for fast, accurate, and versatile robots. First, the prototype robot is described, and basic feedback controllers for single-link drive systems are designed. Second, feedforward compensation is discussed. This compensation significantly reduces the effect of interactions among multiple joints and nonlinear forces. The experiments showed the excellent performance of the direct-drive arm in terms of speed and accuracy.

A New Central Control Scheme for Future Micro-Grid Systems Considering Variable Speed Drive Systems and Fuzzy Logic Control System

2019 ◽  
Vol 8 (2) ◽  
pp. 25-46
Author(s):  
Safwan Mhrez Nadweh ◽  
G. Hayek ◽  
Bassam Atieh
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Power ◽  
Variable Speed ◽  
Nonlinear Loads ◽  
Distortion Factor ◽  
Variable Speed Drive ◽  
Grid Systems ◽  
Micro Grid ◽  
Drive Systems

The increased use of nonlinear loads in power systems have caused problems with the quality of electrical power systems, which affects its performance. One of the most important nonlinear loads is variable speed drive systems (VSDS) which causes issues to the industrial plants power supply. In this article, the authors compare different control methods to apply the bias voltages required to operate transistors in the four-quadrant chopper which added to the dc- link of the variable-speed drive system in order to improve power quality, considering future micro-grid systems. A selection is then made of the appropriate one that improves power quality specifications. This article discusses the issues related to VSDS, such as total harmonic distortion factor THD%; the ripple factor of the DC current and voltage of the VSDS; and its harmful effects on the power system.

Fundamental Design of a Consequent-Pole Transverse-Flux Motor for Direct-Drive Systems

2013 ◽  
Vol 49 (7) ◽  
pp. 4096-4099 ◽  
Author(s):  
Yasuhito Ueda ◽  
Hiroshi Takahashi ◽  
Toshikatsu Akiba ◽  
Mitsunobu Yoshida
Keyword(s):  
Direct Drive ◽  
Transverse Flux ◽  
Drive Systems ◽  
Consequent Pole ◽  
Fundamental Design

A Comprehensive Review of Permanent Magnet Transverse Flux Machines: Use in Direct-Drive Applications

2020 ◽  
Vol 26 (6) ◽  
pp. 87-98
Author(s):  
Tausif Husain ◽  
Iftekhar Hasan ◽  
Yilmaz Sozer ◽  
Iqbal Husain ◽  
Eduard Muljadi
Keyword(s):  
Permanent Magnet ◽  
Direct Drive ◽  
Comprehensive Review ◽  
Transverse Flux

scholarly journals VARIATION OF ELECTRIC PROPERTIES BETWEEN SURFACE PERMANENT MAGNET AND INTERIOR PERMANENT MAGNET MOTOR

2012 ◽  
Vol 06 ◽  
pp. 109-114
Author(s):  
BYUNG-CHUL WOO ◽  
DO-KWAN HONG ◽  
JI-YOUNG LEE
Keyword(s):  
Permanent Magnet ◽  
Complex Geometry ◽  
Torque Ripple ◽  
Direct Drive ◽  
Element Analysis ◽  
Torque Density ◽  
Interior Permanent Magnet ◽  
3D Fea ◽  
High Torque ◽  
Transverse Flux

The most distinctive advantage of transverse flux motor(TFM) is high torque density which has prompted many researches into studying various design variants. TFM is well suited for low speed direct drive applications due to its high torque density. This paper deals with simulation based comparisons between a surface permanent magnet transverse flux motor(SPM-TFM) and an interior permanent magnet transverse flux motor(IPM-TFM). A commercial finite element analysis(FEA) software Maxwell 3D is used for electromagnetic field computation to fully analyze complex geometry of the TFMs. General characteristics, such as cogging torque, rated torque and torque ripple characteristics of the two TFMs are analyzed and compared by extensive 3D FEA.

Comprehensive Review on Flexoelectric Energy Harvesting Technology: Mechanisms, Device Configurations, and Potential Applications

2021 ◽  
Author(s):  
Alekhika Tripathy ◽  
Balasubramaniam Saravanakumar ◽  
Smita Mohanty ◽  
Sanjay K. Nayak ◽  
Ananthakumar Ramadoss
Keyword(s):  
Energy Harvesting ◽  
Comprehensive Review ◽  
Potential Applications

scholarly journals IoT Technologies during and Beyond COVID-19: A Comprehensive Review

2021 ◽  
Vol 13 (5) ◽  
pp. 105
Author(s):  
Mohamed Yousif ◽  
Chaminda Hewage ◽  
Liqaa Nawaf
Keyword(s):  
Social Impact ◽  
Contact Tracing ◽  
Privacy And Security ◽  
Comprehensive Review ◽  
Iot Applications ◽  
Depth Analysis ◽  
Challenges And Opportunities ◽  
Potential Applications ◽  
Readiness Level ◽  
Improved Performance

The COVID-19 pandemic provided a much-needed sanity check for IoT-inspired frameworks and solutions. IoT solutions such as remote health monitoring and contact tracing provided support for authorities to successfully manage the spread of the coronavirus. This article provides the first comprehensive review of key IoT solutions that have had an impact on COVID-19 in healthcare, contact tracing, and transportation during the pandemic. Each sector is investigated in depth; and potential applications, social and economic impact, and barriers for mass adaptation are discussed in detail. Furthermore, it elaborates on the challenges and opportunities for IoT framework solutions in the immediate post-COVID-19 era. To this end, privacy and security concerns of IoT applications are analyzed in depth and emerging standards and code of practices for mass adaptation are also discussed. The main contribution of this review paper is the in-depth analysis and categorization of sector-wise IoT technologies, which have the potential to be prominent applications in the new normal. IoT applications in each selected sector are rated for their potential economic and social impact, timeline for mass adaptation, and Technology Readiness Level (TRL). In addition, this article outlines potential research directions for next-generation IoT applications that would facilitate improved performance with preserved privacy and security, as well as wider adaptation by the population at large.

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