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This paper presents a comprehensive survey of the energy harvesting concept in the current social and technological context, with the intent to draw attention to linear generators, in different topologies, as competitive candidates in green energy conversion microsystems. The emerging technologies of energy scavenging are discussed, examining both the environmental sources and a selection of applications...
This paper proposes the ferrite magnet-assisted synchronous reluctance (FMASR) machine topology for use as direct-driven generator in low-speed micro-wind power applications. The FMASR generator consists of a stator core hosting three-phase distributed winding, and a transversally-laminated rotor having multilayer flux-barriers with embedded FMs in flux-concentration arrangement. Analytical model...
In a world of continuous changes, environmental protection and energy conservation are becoming real concerns. The development of renewable energy technology has taken on an accelerated pace to fulfill these needs. Wind energy conversion has been considered to be one of the most promising renewable energy, owing to its fast developing technology. In the present paper, three-phase 12/8 switched reluctance...
This paper investigates two topologies of ferrite-permanent-magnet synchronous machines for use as direct-driven generators in micro-wind power applications, i.e. the axial-flux double-sided inner-stator permanent-magnet (AF-PM) generator and the radial-flux spoke-type interior-permanent-magnet (RF-IPM) generator. The comparative design analysis of AF-PM and RF-IPM micro-wind generators based on finite-element...
Loss analysis of small induction motors is conducted in order to show the differences by supplying with sinusoidal and PWM voltage. In the first part of the analysis, under sinusoidal voltage supply, the motor was tested according to the Canadian CSA C390-98 standard (based on IEEE 112B). These results are the reference for finite element-based and analytical loss calculations. In the second part...
Rapid prototyping is the typical method used by engineers to develop and test control strategies. The paper presents an Embedded Motor Drive test bench for developing and study energy efficient of motor drives. The prototyping platform system uses Matlab/Simulink and Target Support Package for TI C2000 toolbox. A real-time target controller eZdsp F2812 provided with a power stage inverter represents...
This paper approaches the electromagnetic design and finite-element analysis of an axial-flux permanent-magnet (AFPM) synchronous generator for small-scale wind turbines. The study is conducted to find a good-performance and cost-effective electric generator topology for micro-wind power application. The proposed double-sided two-stators-one-rotor AFPM synchronous generator with non-overlapping concentrated...
The paper presents an Embedded Motor Drive Prototyping test bench for developing and study energy efficient of the motor drives. The development platform uses an eZdsp target controller with power stage converter that employs Targeted Code Generation from Matlab-Simulink and the Target Support Package for the TI C2000 microcontrollers. Computer Aided Control System Design (CACSD) tools are used to...
This paper proposes an innovative topology for double-sided inner-stator axial-flux permanent-magnet (AFPM) machine for use as direct-driven generator with low-speed micro-wind turbines. The design evaluation of the new AFPM wind generator, based on 3-D finite-element field analysis, proves that the ironless stator with non-overlapping concentrated winding, sandwiched between two opposing steel-rotor...
This paper presents a comparative study between the axial-flux and radial-flux permanent-magnet synchronous generators for a 3 kW wind turbine application. This study emphasizes the most cost-effective solution to be implemented by the industrial partner. There are three constructive types of electric generators considered in this work. All are based on permanent-magnet synchronous generators (PMSGs),...
Hybrid electric vehicles and full electric vehicles are becoming a viable alternative to gasoline or diesel powered vehicles. Four main factors are contributing to this evolution: oil price, pollution, greenhouse effect and advances in electrochemical energy storage. All major car manufacturers are developing projects in this area. Until now, the full electric vehicles available on the market have...
The paper focuses on the development and implementation by means of dSPACE-based hardware-in-the-loop (HIL) simulation and experiment of a Direct Thrust Force Control (DTFC) for a two-phase tubular permanent-magnet actuator (TPMA), with discussion on electric supply, inverter topologies, and applicability. The results of the embodied control strategy in real time direct-drive systems confirm its applicability,...
A Permeance Network Analysis (PNA) of the dynamic behavior of a three phase Switched Reluctance Motor fed from a full-bridge inverter is presented. The non-linear effects due to global and local saturation are taken into consideration as well as the mutual coupling between phases. All permeances in the magnetic circuit are analytically computed in order to reduce the overall computation time in view...
This paper proposes a direct power control technique applied to a variable-speed doubly-fed induction generator (DFIG) of a micro-hydro energy conversion system. This assembly consists of a permanent-magnet synchronous machine (PMSM) linked mechanically and electrically (through back-to-back power electronic converters) to the DFIG (on the rotor side). The PMSM has the role to recover or supply the...
This paper reports on experimental results for a grid-connected hybrid wind/micro-hydro power system associated with a supercapacitor energy storage device (SCESD). It comprises a doubly-fed induction generator linked mechanically and electrically (through back-to-back power electronic converters in the rotor circuit) to a permanent magnet synchronous machine, which may recover or supply the slip...
Flywheel energy storage systems (FESSs) improve the quality of the electric power delivered by wind generators, and help these generators contributing to the ancillary services. Presently, FESSs containing a flux-oriented controlled induction machine (IM) are mainly considered for this kind of application. The paper proposes the direct torque control (DTC) for an IM-based FESS associated to a variable-speed...
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