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This paper describes a digital-mapping DDFS with a frequency tuning and amplitude resolutions of 24-bits and 10-bits respectively. This Si-CMOS-MMIC is the first solution supporting a sampling rate of 7GS/s and frequency, phase and amplitude modulations in the digital domain. It includes a 14-bits pipelined ripple-carry adder and a 10-bits high-speed multiplier for phase and amplitude modulations...
In this paper, in order to replace a conventional electric linear actuator which is consist of rotary PM machine and ball screw, a novel double-sided five-phase modular linear permanent magnet synchronous machine (MLPMSM) is proposed and designed with the same volume. The basic structure of the machine is firstly described and the major dimensions of one module are then optimized to acquire the largest...
In this study slip permanent magnet couplers (slip-PMC) for wind turbine application are introduced and their analysis technique used in finite element method (FEM) is presented. Two optimization methods are employed in determining optimum permanent magnet (PM) rotors for a fixed wound rotor size. The machine topologies, namely surface-mounted and spoke-mounted PM rotor topologies are evaluated against...
Cloud computing is used to provide memory and processing unit over the internet on pay-per-use basis. During the initial stage, the cloud computing environment faced complex problems due to multiplexing number of requests with available resources. The current state of the art is researchers have numerous solutions to resolve issues in handling CPU and RAM but, to the best of our knowledge; they have...
Aiming at the problem of multi-DOF bionic drive, a new type of hybrid driven permanent magnet multi-DOF motor with liquid suspension mode is presented in this paper. The structure and working principle of the motor are introduced in detail. The analytical method and the finite element method are used to analyze the air gap magnetic field, and the results are compared and verified. In addition, the...
This paper provides description of frequency-effective command and measurement system. The rise of frequency resource usage efficiency is achieved by means of application of simple digital modulation for simultaneous range measurement and command and telemetry data transmission.
In this paper we present methods to reach 10-years of battery life for Industrial Internet of Things (IIoT) wireless sensor network (WSN) using a platform called the I3Mote. I3Mote provides connected sensor nodes for tough industrial environment and a number of I3Motes can form a large-scale coverage of data collectors or actuators. The goal is to achieve 10-years network life time for all the connected...
Diesel Engine Generators (DEGs) are used to generate power but in the process produce emissions of toxic air pollutants (taps). These ‘taps’ include Particulate Matter (PM) and Oxides of Nitrogen (NOx) which are harmful to humans and the environment. This paper has investigated the effect of retrofitting a 15kVA DEG using Retrofitted Diesel Fuel (RDF) and Pure Diesel Fuel (PDF). The data obtained...
This paper mainly focuses on the analysis of the eddy current loss in permanent magnet (PM) of the surface-mounted PM vernier machine (SPMVM). The eddy current losses under open-circuit, armature reaction and load conditions are detailed investigated by the analytical method and finite-element analysis (FEA). The influence of the pole ratio, which is defined as the ratio of the rotor PM pole-pairs...
Cloud computing is an evolution of Distributed system that has been adopted by worldwide scientifically and commercially. For optimal use of cloud's potential power, effective and efficient algorithm are required, which will select best resources from available cloud resources for different applications. This allocation of user requests to the cloud resource can optimize various parameters like energy...
A low-smoke fuel (LSF) produced via the devolatilisation of coal lumps is proposed as an option to combat the health-damaging effects of domestic coal combustion. This study investigates the effect of the LSF particle size on its performance in a conventional domestic coal stove. Three size groups, 15mm, 40mm, and a mixed size LSF were tested against their coal counterpart for reduction in CO and...
Air quality in the South African low-income residential areas is poor due to gaseous and particulate emissions from a range of sources including domestic burning. The absence of data on fuel use and variability in low-income residential areas introduces uncertainties when quantifying total emissions from the township. The aim is to characterise KwaDela resident's fuel use, and stove operation behaviour...
This paper compares three high aspect ratio axial field topologies for traction applications employing soft magnetic composite (SMC). The paper examines the following topologies using finite element (FE) method: a torus, a yokeless and segmented armature (YASA), and a single-sided configuration. All the machines are designed to the same specification for a light electric vehicle, and the FE simulations...
Nowadays, low cost and high efficiency electrical motors are useful in order to reduce the growing energy consumption. Synchronous Reluctance Motors (SynRMs) with and without permanent magnets (PMs) have a somewhat higher efficiency and nevertheless acceptable cost compared to induction machines. This paper focuses on the rotor design without magnets and with PMs and its impact on the performance...
Particle pollution problem has become widely catastrophic in many countries around the world. During outdoor activity, many people have to face the effects of particle pollution in the atmosphere. This is the main cause for respiratory health defects, such as heart, vascular, stroke and lung disease. In order to protect and prevent people from the particle matter area, this research shows the step...
The aim of this paper is to provide a well-organized design procedure for selecting the proper permanent magnet (PM) material to be used in constructing the interior permanent magnet synchronous machines (IPMSM). A simple and clear design flow chart is introduced to support the machine designer in each design step. The design starts by selecting one of the proposed PM grades as a base line material...
Many experimental results round the worls have measured elevated concentrations of fine particles in underground metro systems, with significant implications for human health caused by the protacted exposition to Particulate Matter (PM). On the basis of these considerations, the aim of this research is to propose an original literature review with respect to the particulate matter concentrations (PM10...
In this paper a high gain low noise Op-Amp has been designed. In designing of a high gain Op-Amp, for large values of coupling capacitor, gain will decrease. Since our requirement was to increase the gain, so we have designed a three stage Op-Amp. Our designed circuit provides gain of 78.4 dB, which is very much larger than two stage Op-Amp. There is a trade-off between various parameters like Phase...
A diesel engine is one of the most fuel efficient engines and expected to save energy even it is necessary to remove particulate matter (PM) contained in the exhaust gas. Diesel particulate filter (DPF) has been established as a key technology in reducing diesel PM, however, technological improvements are still required to reduce pressure drop and to assure the regeneration. Therefore, we focused...
In this paper we review a class of the Continuous Phase modulation (CPM), namely, the Quaternary Frequency Shift Keying (CP-QFSK) signaling and investigate its suitability for the application in mobile radio systems. This type of modulation renders its self as a spectrally efficient scheme that is currently used in a wide variety of applications ranging from communications systems to sonar, geophysics,...
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