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A kind of LLC resonant converter with voltage-doubling rectifier technology is studied in this paper. The converter has not only a general LLC half-bridge resonant converter being easy to obtain ZVS for primary side switches and ZCS for secondary side diodes, a high efficiency of this topology, but also advantages that the transformer structure is simple in which one winding is involved on its secondary...
This paper presents the analysis and design of a boost converter with bipolar Dickson voltage multiplier. The bipolar Dickson voltage multiplier offers high gain with low stress on both capacitors and switches. Connecting bipolar Dickson cell to a boost converter yields several benefits such as an overall high static voltage gain and at the same time reduces the required inductance that ensures operation...
In three-phase dual-active-bridge (DAB) converter, the zero-voltage-switching (ZVS) range, DC capacitor ripple current and converter efficiency are significantly impacted by the selectable system parameters, including transformer turn ratio n, switching frequency f and leakage inductance Lk. The converter performance also varies with different operation conditions, i.e., input voltage, output voltage...
This paper presents a multilevel modular step-down DC-DC switched-capacitor converter that utilizes soft switching resonant operation. Previous versions of traditional multilevel modular switched-capacitor dc-dc converters (MMSCC) have a low switching device voltage rating. Moreover, capacitor voltage stress increases proportionally as the voltage conversion ratio increments. Significant advantage...
This paper proposes a transformer based self-starting boost converter for thermoelectric energy harvesting, which operates even when polarity inversion of thermoelectric generator (TEG) occurs. TEG is used to convert thermal energy into electrical energy. Due to the Seebeck effect, an open circuit voltage of the TEG is proportional to the number of thermocouples in series and to the temperature difference...
This paper presents a 1200 V, 120 A SiC phase-leg power module built in a novel low inductive 3D hybrid structure. The power module consists of DBC substrate and Flexible Printed Circuit (FPC) board equipped with SiC MOSFETs and diodes. The parasitic inductance of the power module is significantly minimized by using the FPC board and the proper layout design to 0.79 nH (extracted by Q3D). The power...
This paper presents a single-stage soft-switching high-frequency link isolated converter for bidirectional motor drive applications. The ‘minimal’ topology is based on the recently proposed soft-switching solid-state transformer (S4T) with a single current-source power conversion stage. This single stage approach reduces total switch rating, provides sinusoidal input and output voltages, and uses...
This paper proposes spread spectrum methods to reduce radiation noise caused by an inductive power transfer (IPT) system. A noise reduction method with spread spectrum techniques has been proposed. The proposed noise reduction method randomly changes the output frequency of an inverter within a range of 79-to-90 kHz. Changing the output frequency, the radiation noise is spread in a frequency domain...
This paper presents the operation principle and benefits of a novel power converter topology named three-level two-stage decoupled Active Neutral Point Clamped Converter (3L-TDANPC), which is implemented based on a hybrid utilization of Si IGBTs and SiC MOSFETs. The 3L-TDANPC converter can achieve high efficiency with limited number of SiC MOSFET modules while keeping balanced distribution among the...
Among various converters, the LLC electric current resonant converter attracts attention because of high power density, low noise and high efficiency. However, this converter cannot apply the analysis of averaging method, and impossible to derivate the transfer function, so designing is difficult. In this study, we devised a method to derive a frequency response characteristic with a transfer function...
This paper presents an Integrated switched-coupled-inductor boost-flyback converter (abbreviated as SCIBFC), which has benefits of both Integrated boost-flyback converter (IBFC) and switched coupled-inductor boost converter. The principle of the proposed converter, analysis of operation (including the effects of parasitic parameters), and design guideline are included. SCIBFC achieves soft-switching...
This paper presents the analytical design procedure to select the inductance and the capacitance values of both the input and output filters for the 5-Level three-phase Back to Back E-Type Converter (5L3Φ BTB E-Type Converter). The 5L3Φ BTB E-Type Converter is used to accomplish the double conversion AC-DC/DC-AC in applications which include variable speed industrial electric drives and the interfacing...
This paper introduces a new insertion index selection method to control a Back-to-Back Modular Multilevel Converter (MMC) laboratory platform. The test bench is based on a Power-Hardware-In-the-Loop (PHIL) setup constructed from two 6kVA, 3-phase, 10 cells per arm MMC systems connected in Back-to-Back configuration. The proposed insertion index selection method uses the arithmetic mean of available...
This paper presents a simplified direct modulation prediction approach for modular multilevel converters (MMC). By using the Euler approximation, the grid-side and circulating currents are firstly predicted to obtain the values in the next switching cycle. Then the modulations are directly calculated based on the established mathematical models for the six-arms of MMC. Subsequently, the capacitor...
This paper has put forward a breakthrough design method for 5G power lighting and thermal. In order to improve the outdoor lightning protection ability, this paper presents a simplified compact lightning protection circuit, whose lightning protection ability can reach 20KA. It also advises to add an ORing MOSFET at the output end of power system, to solve the problem of the limit-exceeding of the...
In this paper, the design of a multi-layer laminated busbar for a Si and SiC hybrid switch based 100 kW three-level T-type, single-phase, power electronics building block is presented. Due to the absence of three-level T-type topology in WBG based power modules at this power level, the PEBB design along with the busbar design is novel. This busbar facilitates the interconnection between the DC-link...
A bidirectional interleaved forward-flyback DC-DC converter with leakage energy recycled is proposed in this paper. The proposed converter uses two transformers to reduce the current stress on the power components to reduce the conduction loss and improve the efficiency. When the proposed converter is operated in the step-up mode, the voltage across switches is clamped at the input voltage, and the...
This paper presents guidelines for passive components design of single-stage buck-boost inverter with unfolding circuit. This inverter has low number of passive components and it is intended for application where a wide input regulation range is required. All theoretical statements are confirmed by simulation results.
In this paper, the low voltage and high current driver is used as an example to analyze and suppress the EMC problem caused by DC / DC power conversion. In the process of low-voltage and high-current driver design, the problem of misalignment of the drive signal occurs. The paper analyzes the mechanism of the electromagnetic interference in the switch process, and then detects the electromagnetic...
High-speed permanent magnet motors (HSPMMs) have gained ever-increasing interests in high speed direct-drive applications due to their advantages of high-power density, small size and high efficiency. However, the low stator inductance of the HSPMM causes large current ripple in the stator current, therefore brings additional iron loss. The Modular multilevel converter (MMC) increases both voltage...
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