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The symmetrical compensation is widely used in inductive power transfer (IPT) system due to the advantages of achieving good coupling coefficient when the coils are perfectly aligned and easy to design. This paper investigates a general tuning method for voltage-fed symmetrical higher-order resonant networks for achieving load-independent transconductance. With the proposed tuning method, a resonant...
Z-source inverters (ZSIs), compared to the conventional two-stage architecture, embrace some interesting features, like the reduced size and complexity of the entire conversion system. Many research activities have been established to improve the performance of the so-called ZSI since it has been proposed in 2003, and several modifications have been introduced since then. These modifications include...
Owing to economic aspects, Central inverter is the dominating candidate in large scale PV installations despite its lower energy harvest compared to other topologies like string inverters especially under partial shading conditions. In this paper a new voltage balancing topology is introduced to enable better energy yield from central inverters. The proposed topology is characterized by its fractional...
An isolated high-voltage high-frequency pulsed power converter for non-thermal plasma ozone generation is proposed in this paper. With an input of 500 VDC, the output pulsed voltage can reach −12 kV through the inductor-capacitor resonance together with a step-up transformer. The pulse duration is designed as 1.66 μs. An anti-series connected switch pair at the input terminal enables the energy stored...
Over the past decades, many WSN (Wireless Sensor Network) systems have emerged. Today, the WSN systems with different technologies have started to become parts of Internet of Things (IoT) and Cyber-Physical Systems(CPSs). This situation has also led to the emergence of heterogeneous and autonomous WSN structures. In these types of complex projects, involving different WSN systems, it is necessary...
This paper presents a novel tubular flux-reversal transverse flux permanent magnet linear machine (FR-TFPMLM), in which both magnet and armature winding are located at the short primary side whereas the secondary side is composed of only magnetic steel. This configuration is typically used in long stroke applications to save magnet material. With different configurations of phase winding, the machine...
This paper develops an analytical model to study the performance of dual-wound three-phase surface permanent magnet synchronous machines under normal operating conditions and various fault scenarios. A generic analytical model of inductance calculation is developed considering multiple layers of coils in the stator slots for different slot-pole combinations. The performance of three dual-wound machine...
This paper investigates two converters composed of a five-level H-bridge cell cascaded with a three-level one. Two types of 5-level H-bridges are used, the first one is composed of a NPC leg and a 2-level leg (in the first topology), and the second one is composed of NPC legs only (in the second configuration). In both topologies the 5-level cell is cascaded with a 3-level H-bridge. Both converters...
An analytical approach for accurate calculation of the conduction and switching power losses associated with the switching devices in the 5-Level 3-Phase Back to Back E-Type Converter (5L3ϕ BTB E-Type Converter) has been proposed in this paper. The 5L3ϕ BTB E-Type Converter is composed by two different multilevel topologies: the 5-Level E-Type Inverter and the 5-Level E-Type Rectifier. The power losses...
This paper discusses a power rectifier based on a cascaded topology composed of a three-leg cell and three H-bridge cells. Each leg of the three-leg cell is cascaded connected to an H-bridge cell. Since different types of converter are series-connected, the topology is assumed to be hybrid. The capacitors of the H-bridge cells operate as floating capacitors. It is shown that the discussed topology...
This paper presents the design and control of a three-phase ground power supply unit for aircraft servicing. A new mixed technology converter composed by a three-phase Silicon Carbide (SiC) full bridge unit and a three-phase full bridge IGBT unit connected across the same dc link is used instead of the conventional full bridge configuration. In order to satisfy the stringent requirements of the output...
This paper proposes a single-phase AC converter with an active power decoupling circuit operated in DCM (discontinuous current mode) for PV (photovoltaic) systems. The proposed converter consists of an H-bridge single-phase AC converter and a boost converter, and a compensation circuit employed with a small capacitor for the power ripple. In many active power decoupling topologies that have been studied,...
This paper investigates two five-level reduced hybrid inverters with split-wound coupled inductor and reduced number of components. The proposed inverters are composed of two legs, one of two levels and another of three-levels. Two types of three-level leg have been investigated: diode-clamped and flying capacitor. When compared with more conventional topologies consisting of two three-level legs,...
This paper presents a new topology of multilevel converter that allows to increase the number of output voltage levels reducing the numbers of semiconductors necessary in comparison with the standard multilevel converters like Active Neutral Point Clamped (ANPC) and Stacked Multicell Converter (SMC). This new topology called Reduced Multilevel Converter (RMC) consists of a tandem connection of basic...
In order to reduce the size of high-voltage flying capacitors in the five-level hybrid-clamped inverter, an improved modulation strategy based on phase-shifted PWM (PSPWM) is proposed in this paper. The four carrier waves are redistributed and the charge/discharge time of the high voltage capacitor can be largely reduced. The only disadvantage of this PWM scheme is that the harmonic characteristic...
Boundary conduction mode control is a convenient and low cost method for realizing power factor correction in boost and flyback converters. A signal proportional to the input sinusoid is used as a reference for shaping an inductor current. For a boost converter, this renders the input current to be sinusoidal, but it causes distortion in Flyback and buck derived converters. Mathematically, it can...
The paper presents a new bridgeless buck-boost PFC with the use of the Active Virtual Ground (AVG) technique which is called Manitoba Rectifier. The proposed topology can convert the grid AC voltage to a wide range of voltage output within a single stage circuit. By using the simple structure and the bridgeless technique, an efficient system is able to be guaranteed. In addition, the proposed topology...
Multilevel topology and selective harmonic compensation (SHC) can control active power, reactive power, and to provide ancillary functions to support the grid. However, researchers find that with conventional L or LCL filter, multilevel SHC would act as noise source and inject harmonics to the grid by itself. Moreover, the output current of the multilevel converter is sensitive to the error of the...
A hybrid active filter with a new voltage synchronization control loop is proposed to improve the harmonic content of nonlinear active front end converters for mobile mining equipment. This hybrid filter topology utilizes the DC bus established by the AFE and provides load harmonics at the PCC. Unlike traditional hybrid active filters, this topology uses no real power or control loops to maintain...
Paralleled inverters have the merits of high power rating, improved reliability and convenient maintenance, but zero-sequence circulating current (ZSCC) will occur and lead to current distortion and system loss. The ZSCC control is more complicated when adopting three-level topology and increasing paralleled number. This paper addresses the suppression of ZSCC in multi-paralleled three-level T-type...
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