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In this work a model of the oscillator with inductive coupling of the gates operating at ultralow voltage is presented and experimentally verified. The topology needs a bias voltage at the gates, and we propose a circuit called starting block to generate this voltage from the supply. Theoretical behavior is compared with experimental results, showing good agreement. The circuit, which behaves as astable...
Front end PFC (power factor correction) boost ac-dc converter is an intrinsic part of applications like telecom servers, electric vehicle (EV) charging, and microgrids. In this paper a bridgeless PFC boost rectifier with two dc/dc boost circuits topology is employed to convert universal ac input to a fixed and regulated output dc voltage. High efficiency and power density are key figure-of-merits...
Compared to conventional L filters, LCL filters and LLCL filters have better high-frequency harmonic attenuation ability with less total inductance. However, one or two more magnetic cores are commonly demanded for grid-side and paralleled trap inductors. To further reduce the weight and volume of filter inductors, magnetic integration technique is an effective way. For conventional integrated LCL...
High power multi-level converters are deemed as the mainstay power conversion technology for renewable energy systems including the PV farm, energy storage system and electrical vehicle charge station. This paper is focused on the modeling and design of coupled and integrated magnetics in three-level DC/DC converter with multi-phase interleaved structure. The interleaved phase legs offer the benefit...
This paper introduces the differential-mode circulating current (DMCC) and zero-sequence circulating current (ZSCC) reduction method for paralleled inverters with zero common-mode (CM) PWM algorithm. By analyzing the reason of current jump in phase-leg, the method based on the freedom of PWM signal exchange and active voltage vector sequence exchange can be adopted which can keep volt-seconds balance...
This paper proposed a novel multiplexing module based on LCL topology for dynamic wireless charging of electric vehicles. The LCL compensation network is widely used due to its insensitivity of output characteristics to load variation. But the design of an LCL topology requires a compensation inductor with the same value of a transmitter. The proposed multiplexing LCL module (MLM) can make the primary...
For suppressing of the conducted electromagnetic interference (EMI), passive EMI filter (PEF) is the most widely applied technique at present. The near-field coupling due to PEF passive components layout has great influence on filtering performance. Currently, the layout of PEF components completely dependents on the experience of EMC engineer. However, there is a lack in systematic design method...
Single-ended primary-inductor converter (SEPIC) is a dc-dc converter which uses a series capacitor to couple energy from the input to the output. The customized SEPIC converter by two configurations lacking magnetic coupling and by means of magnetic coupling is presented with two high-static gain here. The configuration through magnetic coupling have an output voltage of efficiency 91.9% with a increase...
Traditional half bridge dual buck inverter (DBI) has a low power density due to the employing of two large input capacitances and two discrete output inductors. Magnetic integration is an effective method to enhance power density. However, unexpected circulating current may be induced by adopting conventional magnetic integration scheme. This paper proposes a novel magnetic integrated DBI inverter,...
To increase the efficiency of the three-phase dual active bridge (DAB) converter for low voltage direct current (LVDC) system, the design consideration based on performance analysis is proposed. The three phase DAB converters are widely used in high-power applications requiring bidirectional power conversion. This is because the three phase DAB converter has not only capability of zero voltage switching...
Based on the analysis of the SRG power generation system, a zero-input current ripple QBC with coupled inductor was designed to solve the problem about the large ripple of output voltage and the influence of current ripple on the load in case of endangering the operation of sensitive load, which can realize zero-input current ripple and zero-output voltage ripple by allocating parameters(turn ratio,...
In this paper, a concept is presented for simplifying and accelerating the development and testing process of a Permanent Magnet Synchronous Machine (PMSM), or its control unit, without utilizing any actual electric machine. The proposed Permanent Magnet Synchronous Machine Emulator (PMSME) utilizes the Power-Hardware-In-the-Loop (PHIL) concept to reproduce the mechanical and electrical characteristics...
This paper presents a high power density coupled tape-wound inductor consisting of nano-crystalline material used in a DC/DC converter. In a first step the comparison of the 2-phase coupled inductor (CI) with the 2-phase interleaved converter (SII) is presented. Second step is designing the CI ρ/η-pareto analysis. To test the device a high power density SiC-converter is designed. The experimentally...
Two-phase residential installations have become very common in Ecuador since different policies prompt the users to replace gas stoves and water heaters by electric appliances. The addition of a second phase to the originally installed single-phase wiring is required to obtain 220Vrms. This fact carries an intrinsic unbalance since single- and two-phase loads coexist. In this paper a topology for...
Filter design heavily depends on magnetic inter-component couplings. To determine the magnetic coupling, i.e. the mutual inductance between two components, it is necessary to define a coupling model, in order to figure out to which extent a component catches the magnetic field. The coupling model of complex components, such as common mode chokes, cannot be established directly from geometry because...
The fast command tracking provided by the dual-loop fast finite-settling-step (FSS) control for a DC-to-DC converter has been shown to have more energy saving capability than using the conventional PID controller. FSS control is developed based on the accurate nonlinear converter modeling. Thus, circuit parameter mismatch can affect the performance of FSS control so that the loss minimization capability...
This paper is on the study of double coupled oscillators, where two cross-coupled differential oscillators share the same bias current. Without external coupling, competition for bias current happens, and the one with a higher Q can grab most of the current, and the other one is starved to death. With external coupling, a beat pattern is generated and the beat frequency is strongly related to the...
Interleaved dc/dc converter with coupled inductors is preferred in high power applications for their better steady- state and dynamic-state performances. But most of the coupled inductors proposed so far for multi-phase interleaved converters are in the same core, which may suffer several issues, such as asymmetrical parameters, high manufacturing cost and large dc flux. In this paper, the merits...
This paper presents the design and implementation of an impedance compression network (ICN) to correct distance variation or misalignment between coils in wireless power transfer (WPT) systems. Magnetic resonant coupling (MRC) coils provide high efficiency for charging mid-range WPT applications. However, a distance variation or misalignment between coils causes a coil-impedance change and significantly...
We present a dc-dc resonant converter structure that has a pair of loosely coupled inductors in place of one filter inductor and two resonant inductors. Not only the number of inductors is reduced by one, but in this arrangment the transformer provides galvanic isolation and requires a sub-unity coupling coefficient which eases the implementation, especially at high switching frequencies. Various...
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