Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"zero-current transition"”.
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Single-switch three-phase zero-current-transition rectifier with power factor correction
A novel, zero-current-transition (ZCT) topology of the single-switch three-phase boost PFC rectifier is proposed. The soft transition is achieved with a low-power auxiliary circuit employing an additional switch. The circuit can be used with an IGBT at switching frequencies up to 50. Its operation …
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Unified zero-current-transition techniques for high-power three-phase PWM inverters
… devoted to a unified and comprehensive study of zero-current-transition (ZCT) soft-switching techniques for high-power three-phase PWM inverter applications. Major efforts in this study are as follows: 1) Conception of one new ZCT scheme and one new ZCT topology; 2) Systematic comparison of a …
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Soft-switching techniques for pulse-width-modulated converters
… families of soft-switching PWM converters: the zero-voltage-switched (ZVS) PWM converters, the zero-current-switched (ZCS) PWM converters, the zerovoltage- transition (ZVT) PWM converters, and the zero-current-transition (ZCT) PWM converters. The family of ZVS- and ZCS-PWM converters are …
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Analysis and Evaluation of Soft-switching Inverter Techniques in Electric Vehicle Applications
… types of soft-switching inverters realizing the zero-voltage-transition (ZVT) or zero-current-transition (ZCT) operation are identified to achieve high efficiency operation. Then one hard-switching inverter and the chosen soft-switching inverters are designed and implemented with the 55 kW power …
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Implementation of a 100kW Soft-Switched DC Bus Regulator Based on Power Electronics Building Block Concept
… for an 800V DC distributed power system. The zero current transition (ZCT) soft-switching technique is used to improve the performance of the bus regulator by minimizing switching loss and improving overall efficiency. PEBB modules and a digital control building block are the subsystems of the …
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Modeling, Analysis, and Design of Distributed Power Electronics System Based on Building Block Concept
… are evaluated for PEBB applications. The Zero-Current-Transition (ZCT) is proved better because the parasitics in the power current flow path are absorbed into the resonant soft-switching operation. This makes the PEBBs insensitive to system integration. Based on the building block …
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Soft-switching techniques for high-power PWM converters
… with minimum increase of device voltage/current stresses and converter circulating energy, and thus have advantages over conventional techniques in efficiency, power density, reliability, and cost of power converters. The improved zero-current transition (ZCT) converters achieve …
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Optimal vertical plane booster guidance including pitch dynamics
… with minimum increase of device voltage/current stresses and converter circulating energy, and thus have advantages over conventional techniques in efficiency, power density, reliability, and cost of power converters. The improved zero-current transition (ZCT) converters achieve …
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Design and implementation of a universal onboard battery fast charger for transportation electrification applications
… been designed for proof-of concept. The detailed current stress analysis and loss modelling of the proposed converter was done using empirical calculations and verified using PSIM. To enhance the efficiency of the converter, a simple zero current switching (ZCS) method is applied to most operated …
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A Power Conditioning System for Superconductive Magnetic Energy Storage based on Multi-Level Voltage Source Converter
… with a 1800-V DC link, a 200-A maximum load current , and a switching frequency reaching 20-kHz with the help of zero-current-transition (ZCT) soft-switching. This PCS has a great number of advantages over conventional ones in terms of size, speed, and cost. Conventional PCSs use thyristors, …
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Application of High-Power Snubberless Semiconductor Switches in High-Frequency PWM Converters
… the capacity to handle very high voltages and currents but lacked the ability to perform high frequency switching. Low-power converters, such as computer power supplies and low horsepower motor drives, have employed high-frequency switching for years and have benefited from very nice output …