scholarly journals Comparative Study of a Fault-Tolerant Multiphase Wound-Field Doubly Salient Machine for Electrical Actuators

Energies ◽  
2015 ◽  
Vol 8 (5) ◽  
pp. 3640-3660 ◽  
Author(s):  
Li-Wei Shi ◽  
Bo Zhou
Keyword(s):  
Comparative Study ◽  
Fault Tolerant ◽  
Doubly Salient

scholarly journals Modern Messaging Queues - RabbitMQ, NATS and NATS Streaming

2020 ◽  
Vol 9 (2) ◽  
pp. 402-408
Keyword(s):  
Comparative Study ◽  
Fault Tolerant ◽  
Low Latency ◽  
Data Streaming ◽  
The Core ◽  
Actual Time ◽  
Depth Study ◽  
The Comparative Study ◽  
Microservice Architecture

Distributed messaging structures shape the core of massive microservice architecture , cloud native applications and data streaming as they are used to communicate between different application services. With actual-time crucial programs there is a developing need for well-constructed messaging platform this is fault tolerant, has low latency and scalable. This paper surveys various message broker that are in vogue today. These modern message brokers have their own adavantages and disadvantages that have come up lately. There is need for the comparative study to decide which broker is most suitable for a specific appalication. An in-depth study is required to decide which features of a messaging system meet the needs of the application. The paper outlines information about three messaging systems – RabbitMq, Nats and Nats-Streaming and explores the features they offer as well as their performance under varied testing workloads..

scholarly journals Torque characteristics of double-stator permanent magnet synchronous machines

2017 ◽  
Vol 66 (4) ◽  
pp. 815-828
Author(s):  
Chukwuemeka Chijioke Awah ◽  
Ogbonnaya Inya Okoro
Keyword(s):  
Comparative Study ◽  
Permanent Magnet ◽  
Magnetic Force ◽  
Fault Tolerant ◽  
Synchronous Machine ◽  
Synchronous Machines ◽  
Permanent Magnet Synchronous Machines ◽  
Rotor Position ◽  
Rotor Pole ◽  
Static Torque

Abstract The torque profile of a double-stator permanent magnet (PM) synchronous machine of 90 mm stator diameter having different rotor pole numbers as well as dual excitation is investigated in this paper. The analysis includes a comparative study of the machine’s torque and power-speed curves, static torque and inductance characteristics, losses and unbalanced magnetic force. The most promising flux-weakening potential is revealed in 13- and 7-rotor pole machines. Moreover, the machines having different rotor/stator (Nr/Ns) pole combinations of the form Nr = Ns ± 1 have balanced and symmetric static torque waveforms variation with the rotor position in contrast to the machines having Nr = Ns ± 2. Further, the inductance results of the analyzed machines reveal that the machines with odd rotor pole numbers have better fault-tolerant capability than their even rotor pole equivalents. A prototype of the developed double-stator machine having a 13-pole rotor is manufactured and tested for verification.

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