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In an inversion system, high reliability is one of the main targets pursuing. Some problems will threaten the reliability of the system, such as the shoot through issue and the failure of reverse recovery. The dual buck inverters can solve the above problems without adding dead time but the low magnetic utilization increases the volume and weight of the system. This paper firstly reviews the traditional...
This paper examines the quasi-Z-source series resonant DC/DC converter as a candidate topology for the PV module integrated converter (MIC) with an extended input voltage regulation range. The converter features multi-mode operation by combining the shoot-through pulse-width modulation and ordinary phase-shift modulation to realize the boost and buck operating modes, respectively. Our experiments...
A new modular multilevel DC-DC converter with high power density and simplified localized voltage balancing control is proposed. In the proposed configuration, converter building blocks with the same power handling capability are connected in parallel in each row. Converter building block consists of an H-bridge and mutually coupled inductors whose total current is nearly ripple free. These features...
This paper presents a new bidirectional AC-DC interleaved converter topology and its control technique. The proposed control technique, based on One Cycle Controller (OCC), is used to process power in all four quadrants in the V-I plane. A fictitious reactive current is introduced in the control law that decides the PWM switching action. Further, a size reduction of the input side magnetics by the...
A new fault location topology implemented in DC microgrid systems is presented in this paper. Due to existing high level fault current in DC microgrids, the detection, isolation, and location of faults are in great degrees of importance. The main structure of proposing fault location unit is an H-bridge controlled by control electronic platform. Based on the selective switching frequency of the semiconductor...
A family of single phase converters with reduced number of components is introduced in this paper. There are two switches, one coupled inductors and one capacitor in their structure, therefore the cost is reduced considerably. The proposed converters can be used as four quadrant DC/DC converter when fixed duty cycle (D) is applied to switches. On the other hand, they can be used as single phase inverter...
Z-Source inverters can overcome some of the limitations, inherent in traditional Voltage Source and Current Source Inverters and can provide boosted outputs. Most of the literature on Z-source inverters deals with 3-phase or 1-phase bridge inverters. This paper proposes a Single-Phase Z-Source Push-Pull Inverter topology. This scheme has several advantages compared to basic Z-source full-bridge inverter...
In this paper single operational transresistance amplifier based lossless grounded negative inductance simulator topology is presented. The proposed circuit employs only single OTRA and four passive elements. The circuit is studied for nonideality and high frequency self compensation is achieved. Theoretical propositions are verified by simulation.
In this paper, a new bridgeless AC-DC single-ended primary induction (SEPIC) converter for power factor correction (PFC) is proposed. The proposed single phase rectifier has 2 bidirectional switch and 2 fast diodes. The output voltage depends on the switching frequency of the MOSFET. This converter produces low conduction loss, low total harmonic reduction and high power factor reaching near-unity...
Inductive power transfer (IPT) is used to transfer the power over relatively large air gap using the resonant phenomena. The use of IPT in the railway transportations enhances the system performance in terms of reducing the on board energy requirements, minimizing the visual pollution, and reducing the infrastructure. The main challenge in IPT is to transfer efficiently the power from the primary...
This paper discusses four compensation topologies of magnetic coupling system suitable for use in contactless power transfer (CPT) applications. The design and modeling process of CPT system is described in detail. Resonance between the source and load is achieved with compensation capacitors connected at the terminals of the coils. Electric equivalent circuit models are used to describe each circuit...
This paper reports the analyses of two techniques for phase noise reduction in the CMOS Hartley oscillator circuit topology. Namely, the two techniques, noise filter and optimum current density are investigated with the objective of exploring the potential benefits in the mm-waves frequency range. The design of the circuit topology is carried out in 28 nm bulk CMOS technology by STMicroelectronics...
Solid state transformer topologies (SST) have gained great attention because of having features such as reactive power compensation, output voltage regulation and smart grid operation etc. Among SST topologies, three-stage topologies have been mainly focused because there are many appropriate topologies for each conversion stages. However, conventional three-stage topologies may bring complex closed...
In this paper, two types of isolated converter topologies for the implementation of the galvanic isolation of a low-voltage DC network is discussed. Advantages and problems of the topologies are compared and a selection for the suitable topology for two conversion ratios, 1:1 and 2:1 is carried out. The selection is carried out by comparing the life-cycle costs of the converters if used in the low...
This paper proposes an association of two ZVS-PWM three-phase current-fed push-pull DC-DC converters. The ZVS-PWM three-phase current fed push-pull DC-DC converter is already known in literature and can be used to reduce the volume, weight and consequently the cost in many applications when compared to single phase topologies. The proposed association allows the division of the input current between...
This paper further demonstrates the versatility of the Tapped Inductor Switcher (TIS) analysis method proposed in a previous paper. The aim is to extend the application of this modeling technique to converters containing multiple inductive elements. As a study case, a tapped inductor SEPIC derived dc/dc converter is considered. The study from this paper suggests that the SEPIC can be modeled by two...
Photovoltaic power generation is growing worldwide at an accelerated pace. A cascaded multilevel converter topology based on Silicon Carbide switches and high frequency components in association with multiple maximum power point tracking capabilities addresses common limitations of central grid inverters, targeting a raise in the overall efficiency of large-scale photovoltaic power plants. The topology...
This paper proposes two seven level asymmetric inverter with coupled inductors that enable a reduction in the number of controlled switching devices. However, the lack of redundant states and difference in the maximum pole voltages reduce the performance of the inverters due to higher winding currents and saturation of magnetic core. For mitigating those issues, a coupled inductor with elevated magnetizing...
This paper presents the analysis of the application of a hybrid filter (HF) in low voltage distribution systems with linear and nonlinear loads. In the proposed topology, the passive filter (PF) is tuned at third and fifth harmonics, even in situations in which the active filter (AF) is disconnected, and the AF has low rating due his distinct connection to the system. The flexibility and viability...
A low power and high step-down ratio insulated DC-DC converter applied to energy conversion of medium to low voltage is proposed, analyzed and evaluated in this paper. Among its many applications, this work focuses in a compact, simple and low cost galvanic insulation auxiliary power supply. The proposed converter is a multilevel Flyback derived from the Double-Ended topology and it uses the NPC (neutral...
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