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In this paper three different magnet configurations, e.g. single V-shape, double V-shape and delta-shape are investigated in the integer-slot 48/8 and fractional slot 36/8 interior permanent magnet synchronous machines (IPMSM). An optimization procedure for maximizing torque per ampere is used to compare these six motor models under the same output torque levels. The torque qualities at both low-...
This paper studies the performance of the dual 3-level T-type converter topology, as an advanced 5-level converter, applied to an open-ends induction machine. The performance is evaluated based on harmonic analysis, converter power loss and the steady-state machine performance. An advanced technique based on space-vector pulse-width modulation is proposed to reduce the converter switching stress as...
The performance evaluation of an adjustable space-vector (SV) PWM (SVPWM) strategy for open-winding (OW) permanent magnet synchronous machine (PMSM) (OW-PMSM) drives with common DC bus is presented. Different from modifying the conventional SVPWM algorithm, the proposed method is realized by reconstructing the voltage references for individual SVPWM module. No need of modification on a conventional...
This paper presents the assessment of diode clamped multilevel inverters (DCMLI) and cascaded multi-level inverter (CMLI). For each topology its main features and its implementation using MATLAB-Simulink® are presented. From a case study the inverters are compared taking into account the number of elements required, the waveform of the output voltage, the total harmonic distortion on the voltage signal...
Although windings with various numbers of turns per coil have been presented in several papers in the past, a closed theory on applying different turn ratios in electrical machine windings has not been published yet. Conditions under which different turn ratios can be used to improve the MMF spectrum of electrical machines are therefore discussed in this paper. Analytical expressions for winding factors...
Harmonic voltage compensation of the load connected to the point of common coupling (PCC) by using a series of active power filter (SAPF) based on a single phase cascaded multilevel inverter is proposed. The proposed multilevel inverter are presented in detail. The inverter has the ability of acting as a harmonic source when the reference is a non-sinusoidal signal. To achieve this, a simple control...
The flyback type grid-connected micro inverter has received much attention because of its simple structure and electrical isolation characteristics. However, due to the nonlinear characteristics of the flyback converter, a large amount of harmonic currents are generated during the operation process. In this paper, an inverse control method is proposed to improve the grid current quality of flyback...
This paper describes the 2.4 GHz band SOI-CMOS bridge rectifier for sub-W class rectification. The bridge rectifier topology is suitable for IC integration because of full-wave-rectification without large sized filters. Furthermore, to realize high power operation, the series connected gate connected diodes made by NMOS FETs are employed for higher breakdown voltage. And the LPF is added to reduce...
The 3-phase diode bridge rectifier has the least line current distortion among 6-pulse rectifiers; however, its total harmonic distortion (THD) of 31.08% violates power quality standards. This paper reports distortion reduction by lowering magnitudes of harmonics in the line currents using a delta-wye transformer between the 3-phase utility and the diode bridge rectifier. The leakage inductances of...
Fundamental target regarding aforementioned paper is to design a five level multi strand converter topology without a filter inasmuch as appropriated energy resources based dc-ac alteration system based dc-ac alteration system In this title we are proposing two strategies associated with five level's CHB inverter, specifically break even with step strategy and other is selective harmonic elimination...
Variable flux reluctance machines (VFRM) are an interesting candidate to substitute permanent-magnet synchronous machines in many applications, mainly owing to the absence of rare-earth permanent magnets and improved field weakening capability.
Permanent magnet synchronous machines (PMSMs) have been best choice for the applications which require high torque density, efficiency and performance.
A topology of series active power filter (SAPF) based on a single phase half-bridge cascaded multilevel inverter is proposed to compensate voltage harmonics of the load connected to the point of common coupling (PCC). The main parts of the inverter are presented in detail. Any voltage reference can be easily obtained by a simple control with the proposed inverter. Therefore, the inverter acts as a...
In this paper, a Linear Flux-Switching Permanent Magnet Machine (LFSPMM) and Rotating six-phases Flux-Switching Permanent Magnet Machine (RFSPMM) are modeled and compared using FEM. The results from these models are discussed and compared with measurements, regarding shape and amplitude of the resulting back-EMF waveforms. Furthermore, by using current decoupling control algorithm, the second order...
The design and simulation of a Class-E3F2 power amplifier using 65nm CMOS technology are detailed in this paper. The Class-EF amplifier combines aspects of the Class-E and -F load networks such as the harmonic terminations from the Class F and the use of a shunt capacitance at the drain in the Class E. A mixed-voltage cascode topology is used for the output stage to enable the use of fast low-voltage...
A conventional Unified Power Quality Conditioner (UPQC) is a back-to-back shunt and series converters with a dc-link capacitor, requires 12 switches to resolve voltage and current related power quality issues. Recently a nine-switch UPQC (NS-UPQC) is proposed, but suffers with certain limitations like limited reference amplitude and phase shift, twice the rated dc-link voltage and increased stress...
This work addresses a single-stage active power factor correction (PFC) scheme that is implemented using a Floating Interleaved Boost Converter (FIBC) equipped with an indirect Double Integral Sliding Mode Controller (DISMC) adopted for a single phase full bridge rectifier. Due to the high gain, high efficiency and small size components, FIBC-based approach can achieve unit power factor and voltage-regulation...
This paper presents a new asymmetrical single-phase multilevel inverter topology capable of producing nine-level output voltage with reduce device counts. In order to obtain the desired output voltage, dc sources are connected in all the combination of addition and subtraction through different switches. Proposed topology results in reduction of dc source, switch counts, losses, cost and size of the...
The use of a second phase in household electric wiring is a requirement for feeding heavy loads in those countries using 100 ~ 127 Vrms as the standard voltage. One problem of this wiring is the unbalance between phase currents since single-and two-phase loads coexist. A back-to-back topology is proposed for an active power filter to add it the ability of active power compensation. The presented topology...
This paper proposes a review of the use of time-based arrays as RF energy providers in those wireless applications where an energy-aware transmission is of key importance. The higher simplicity and versatility of time-modulated arrays (TMAs) with respect to other modern radiating systems is deeply discussed: in particular, the multi-harmonic radiation capability of TMA is efficiently deployed in the...
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