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The objective of this paper is to investigate the electromagnetic design aspects of a novel flux-switching motor-compressor with rotor poles designed as airfoils to perform compression. The proposed novel flux-switching motor-compressor is both an electric motor as well as an axial-flow compressor. Conventional motor-driven compressor system typically requires an electric motor and a gear box to connect...
The objective of this paper is to analyze a novel high-speed integrated motor-compressor drive system and investigate the opportunities by using gallium nitride (GaN)-based inverters. The proposed integrated motor-compressor is a combination of electric machine and axial-flow compressor by shaping the rotor pole of the electric machine into airfoils. Hence, the proposed integrated motor-compressor...
The goal of this paper is to design and analyze the electromagnetic performance and thermodynamic performance of a high-speed integrated motor-compressor. The integrated motor-compressor is designed based on the flux-switching permanent magnet (FSPM) machine topology. The rotor poles of the proposed integrated motor-compressor are shaped into airfoils, and the proposed machine can produce electromagnetic...
Tropospheric ozone plays an important role in Earth's atmospheric environment and radiative balance. To assess the temporal variation of tropospheric ozone over Asia, ozone data from the Trajectory-mapped Ozonesonde dataset for the Stratosphere and Troposphere (TOST) were collected, evaluated, processed, and analyzed. Comparing TOST with ozonesonde station data and satellite data, there are good agreements...
The Sentinel-2A (S2A) Multi-Spectral Imager (MSI) is a new remote sensor launched on 23 June 2015 that provides unprecedented Earth observation with high spatial, spectral and temporal resolutions. It has high potential for chlorophyll content estimation. Chlorophyll content plays a crucial role in plant photosynthesis affecting the terrestrial carbon cycle. In this research, a physical retrieval...
In this study, the Bottom-Of-Atmosphere (BOA) reflectance over Egbert, Ontario, Canada on September 24, 2016, as obtained by the Sentinel-2A Multi-Spectral Imager and corrected by the Sentinel-2 atmospheric Correction (Sen2Cor) software, was evaluated based on the 6SV atmospherically corrected reflectance. The aerosol and water vapor parameters used in the 6SV model were obtained from the AERONET...
Conventional electrical machine cooling includes housing fins, shaft-mounted fan, and water jacket. In these cases, heat from the copper loss of windings needs to pass through either the stator core or the air between windings and the housing. Because of the large thermal resistance in the path, these methods are sometimes not efficient enough for high torque density machines. Overheat in windings...
The objective of this research is to propose a novel electric machine integrated with the multistage axial-flow compressor. The proposed integrated machine consists of a flux-switching permanent magnet (FSPM) machine with an airfoil-shaped rotor, which can produce electromagnetic torque and compression of gas flowing through it at the same time. Hence, reduced size and higher efficiency can be achieved...
The goal of this paper is to investigate a proposed novel dual-rotor hybrid synchronous machine using two different types of rotors, i.e. the synchronous reluctance (SyR) and surface permanent magnet (SPM) rotors. Conventional design of dual-rotor machine utilizes SPM rotors on both inner and outer sides with toroidal winding configuration. However, there are limitations of using the permanent magnet...
The purpose of this paper is to investigate both the torque ripple reduction technique and influences of mechanical tolerance on the performances of a novel dual-stator 6/4 flux-switching permanent magnet machine. To minimize the torque ripple, step skew designs are studied to determine the optimal step number and step skew span angle. In addition, three common rotor mechanical tolerance deviation...
This paper describes the importance of theta frequency oscillations through analysis in emotion regulation and in various oscillatory patterns with reappraising sad and fear stimuli. Previous research suggests that the processing of fear and sadness has different neural bases, and that dynamics in theta frequency is particularly sensitive to the processing of emotional stimuli. However, it remains...
This paper proposes the analytical design methods of axial flux-switching permanent magnet (AxFSPM) machines. The analytical design methods take the influences of electric and magnetic loadings into account to calculate the specific sizing of the AxFSPM machine. In addition, the winding functions are implemented to derive the self-, mutual-, and d-axis and q-axis inductance. The results of analytical...
The need for high energy density and high efficiency electrical machines and drives for road traction applications is growing rapidly, due to their environmental benefits compared to traditional internal combustion propulsion systems. The demanding specifications defined by the US Drive 2020 program make the design of high-performance traction motors a challenging task. In particular, providing high...
Precise gas turbine engine control for dynamic processes is of great importance in industry. To be able to preciously control the turbine engine an accurate model, which can predict the engine dynamic responses is required. This work focuses on developing a new prediction model for turbine engine rotor speed in a dynamic situation (time-varying rotor speed command). In this new method, the governor...
In this paper, a silicon-carbide based capacitor-switched phase-shifted full bridge DC-DC converter circuit for electrical vehicles is investigated. The state-of-the-art silicon-carbide components were used as switching power devices. The reduction of conduction and switching losses has been achieved by using silicon-carbide devices. As a consequence, the performance of the converter is increased...
The goal of this paper is to propose a novel concept of permanent magnet machine with integrated airfoil-shaped rotor that can perform compression action. Electrically driven conventional compressor systems need electric machines as prime movers to provide mechanical energy to rotate the compressor. The proposed novel integrated permanent magnet machine system synthesizes both an electric machine...
The purpose of this paper is to study the design opportunities in high-speed toothless toroidal winding surface permanent magnet machine enabled by the implementation of silicon carbide-based power electronic inverters. High-speed machines designed with toothless toroidal winding configuration are beneficial to eliminating the cogging torque due to the absence of stator teeth, but the airgap flux...
This paper presents an audio event classification algorithm which automatically classifies an audio event as footstep, glass breaking, gunshot or scream mainly for surveillance applications. First, the Gabor feature of the audio spectrogram is extracted, there are two kinds of Gabor features, namely global Gabor feature and local Gabor feature. Then we use Principal Components Analysis (PCA) and Linear...
High-speed machines require structurally robust rotor to withstand high centrifugal forces. Flux switching permanent magnet (FSPM) machines are ideal for high speeds since they have a simple and robust rotor structure. They also utilize permanent magnet (PM) in the stator enabling them to achieve high power density. It is desirable to keep the operating frequency minimized to reduce core losses and...
The purpose of this paper is to propose a novel flux-switching permanent magnet motor with an integrated airfoil-shaped rotor. Some of the conventional axial-flow compressor systems need an electric motor to provide mechanical energy input to the compressor. The proposed novel flux-switching motor-compressor can integrate both an electric motor and an axial-flow compressor into a single entity and...
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