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A pulsed power system is the transformation of electrical energy in to the high peak power pulses which can be transferred to the load by means of switching devices like MOSFET, SCR, IGBT etc. which converts a low power to high power short time pulse hence, very high average power and energy will get with the pulsed power system. This system is a simply energy storage either in electrostatic field...
Compared with three-phase SRM, multi-phase SRM is higher power density and lower torque ripple. However, with phase number increasing, the requirement of power converters for multi-phase SRM such as using less power devices and independence between phases are enhanced. In this paper, six kinds of power converters for six-phase SRM are investigated and compared including asymmetric half bridge (AHB)...
Power converter open-circuit fault leads to reduction of motor output performance. Fault-tolerant control strategy, which is applied to power converter of four-phase doubly salient electro-magnetic motor (DSEM) drive, is investigated in this paper to improve the post-fault motor performance. A fault-tolerant topology is newly presented. It has the advantage of simple structure with only two bidirectional...
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...
In this paper, a novel torque sharing function (TSF)-based direct instantaneous torque control (DITC) strategy is presented to reduce the torque ripple for switched reluctance motors (SRMs) by using a multi-level converter. The corresponding control algorithm is described and analyzed during the different conduction regions in detail. By using the new converter topology, the TSF-based DITC can compensate...
The Capacitor-Input-Type 3-phase diode rectifiers offer several merits, e.g., compact size, light weight and cheap and thus, those are widely applied in practice. Though, their input currents distort significantly and it can cause harmonic pollution in power systems. Thus, it is essential to obtain solutions with maintaining the merits. In the Choke-Input-Type diode rectifiers, multiple three-phase...
Galvanically isolated impedance-source (IS) dc-dc converters are a high performance solution proven for emerging power electronics applications. However, studies of their bidirectional operation have been scarce. Focus in this paper is on the reverse power transfer possibilities of the high performance quasi-Z-source (qZS) series resonant dc-dc converter. This enables extension of functionality and...
This paper introduces a new transformerless converter topology for Multiphase-Based Wind Energy Conversion Systems (WECSs). In this topology, a twelve-phase induction generator is integrated to the grid using dual Nine-Switch Converters (NSCs) connected in series forming a high voltage cascaded dc-link. For this generator phase number, this topology reduces the total number of semiconductor devices...
This paper presents an optimum solution for field deployment for off-grid renewable energy based single phase power generation using a 3-phase self excited induction generator (SEIG). While several topologies of 3-phase SEIG to feed single phase loads are discussed in the literature, it is essential to study all possible configurations to arrive at best possible solution for given application, to...
In the present scenario, high power industrial drive applications mostly employ Voltage Source Inverter (VSI) fed induction motors. In the very high power ranges (>10 MW), Load Commutated Inverter (LCI) fed synchronous motors are also used. Economy and efficiency are crucial factors for drives in such high power applications. Recently, a new hybrid drive topology using a specially designed dual...
Single-phase four-leg variable frequency PWM drives have been traditionally generating balanced two-phase output voltages resulting in a circular space vector trajectory while feeding the two-phase induction motor (TPIM). Keeping in view of the asymmetry in the auxiliary and main windings in the TPIM, this paper suggests output voltages to be generated by the drive in accordance with the windings...
Variable speed drives system are known to bear Common Mode Voltage which causes shaft voltage, bearing currents and EMI problems. In this paper a new topology to realize multilevel operation for a 3-φ, dual inverter fed open ended winding induction motor with Common Mode Voltage (CMV) elimination is presented. The proposed dual-inverter configuration makes it easy to facilitate all the space vector...
Due to the flybacks' indirect characteristic of energy transfer, the transformer size increases for high power levels. Providing an additional direct energy transfer path can decrease its size. Parallel forward-flyback converters offer such functionality and outperform forward converters with regard to PFC functionality. A balanced forward-flyback converter is a variation on this kind of parallel...
In this paper, a high frequency linked cascaded multilevel inverter (CMLI) is presented, which brings simplicity for CMLI to connect in renewable systems and electronic vehicular applications. The requirement of multiple isolated dc-supplies and their balancing is a critical drawback in CMLI and for this reason; it is very difficult to connect a CMLI directly with any system. The utilization of multi-winding...
Presently, most of the commercial and industrial sectors are using PV system because of its advantages towards clean and green energy. Subsequently, it is not an ideal power source as it solely depends upon sun light. In the recent past, a lot of research and development has been carried out to enhance the reliability, efficiency and cost effectiveness of power electronics converters in order to increase...
This literature review presents a summary of recent research about PM-less machines for electrical vehicles. Recently, IPM machines has proven to be very popular among electrical vehicle manufacturers. However, the neodymium permanent magnets being used are expensive and have a risk of rocketing the production cost of a machine if the price increases more. With this in mind, five PM-less machine topologies...
Currently used inverter solutions for ship propulsion applications are based in classic voltage source inverter (VSI) topologies, mostly two-level voltages source inverters (2L-VSI) and cascaded H-Bridge voltage source inverters (CHB-VSI) which have became a standard as from the industrial point of view. Nevertheless, modern ship propulsion applications are required to operate under faulty conditions,...
This paper proposes a novel hybrid excitation vernier permanent magnet machine (HE-VPM). The characteristics of the proposed machine are: 1) The PMs are embedded in the stator teeth, which is helpful for heat dissipation; 2) the rotor is salient structure without PMs and windings, which ensures the reliability of high speed running; 3) The non-overlapping concentrated winding shortens the end-winding,...
In this paper, a new thin yoke modular linear flux-switching permanent magnet (TYMLFSPM) machine with fault-tolerant capability is proposed. The analysis for the proposed TYMLFSPM machine is carried out by the finite-element method. The ratio of mover pole pitch to stator pole pitch is optimized to increase the thrust force and thrust force density.
Inductive Power Transfer (IPT) systems have been more and more popular as they offer numerous advantages over conventional wired power transfer systems in terms of convenience, safety, isolation, and flexibility. This paper presents an overview of power converter topologies as well as modulation strategies for IPT systems. Besides, a brief introduction to the overview of fundamental components in...
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