Isolated Boost Converter with High Efficiency and Wide Input/Output Voltage Range for Space Electric Propulsion System Applications

2019 ◽  
Author(s):  
Ming Fu ◽  
Zicai Wang ◽  
Donglai Zhang ◽  
Hua Zhang
Keyword(s):  
Electric Propulsion ◽  
Output Voltage ◽  
High Efficiency ◽  
Boost Converter ◽  
Propulsion System ◽  
Input Output ◽  
Voltage Range ◽  
Electric Propulsion System

scholarly journals High Efficiency Buck-Boost Converter with Three Modes Selection for HV Applications using 0.18 μm Technology

2020 ◽  
Vol 18 (2) ◽  
pp. 137-144
Author(s):  
Fouad Farah ◽  
Mustapha El Alaoui ◽  
Abdelali El Boutahiri ◽  
Mounir Ouremchi ◽  
Karim El Khadiri ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Output Voltage ◽  
High Efficiency ◽  
Power Conversion ◽  
Boost Converter ◽  
Current Control ◽  
Voltage Range ◽  
Operating Modes ◽  
Soft Start

In this paper, we aim to make a detailed study on the evaluation and the characteristics of the non-inverting buck–boost converter. In order to improve the behaviour of the buck-boost converter for the three operating modes, we propose an architecture based on peak current-control. Using a three modes selection circuit and a soft start circuit, this converter is able to expand the power conversion efficiency and reduce inrush current at the feedback loop. The proposed converter is designed to operate with a variable output voltage. In addition, we use LDMOS transistors with low on-resistance, which are adequate for HV applications. The obtained results show that the proposed buck-boost converter perform perfectly compared to others architecture and it is successfully implemented using 0.18 μm CMOS TSMC technology, with an output voltage regulated to 12V and input voltage range of 4-20 V. The power conversion efficiency for the three operating modes buck, boost and buck-boost are 97.6%, 96.3% and 95.5% respectively at load current of 4A.

scholarly journals High-efficiency Bidirectional Buck–Boost Converter for Residential Energy Storage System

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3786 ◽  
Author(s):  
Seok-Hyeong Ham ◽  
Yoon-Geol Choi ◽  
Hyeon-Seok Lee ◽  
Sang-Won Lee ◽  
Su-Chang Lee ◽  
...  
Keyword(s):  
Energy Storage ◽  
Output Voltage ◽  
High Efficiency ◽  
Storage System ◽  
Core Loss ◽  
Input Voltage ◽  
Switching Frequency ◽  
Input Output ◽  
Voltage Range ◽  
Output Filter

This paper proposes a bidirectional dc–dc converter for residential micro-grid applications. The proposed converter can operate over an input voltage range that overlaps the output voltage range. This converter uses two snubber capacitors to reduce the switch turn-off losses, a dc-blocking capacitor to reduce the input/output filter size, and a 1:1 transformer to reduce core loss. The windings of the transformer are connected in parallel and in reverse-coupled configuration to suppress magnetic flux swing in the core. Zero-voltage turn-on of the switch is achieved by operating the converter in discontinuous conduction mode. The experimental converter was designed to operate at a switching frequency of 40–210 kHz, an input voltage of 48 V, an output voltage of 36–60 V, and an output power of 50–500 W. The power conversion efficiency for boost conversion to 60 V was ≥98.3% in the entire power range. The efficiency for buck conversion to 36 V was ≥98.4% in the entire power range. The output voltage ripple at full load was <3.59 Vp.p for boost conversion (60 V) and 1.35 Vp.p for buck conversion (36 V) with the reduced input/output filter. The experimental results indicate that the proposed converter is well-suited to smart-grid energy storage systems that require high efficiency, small size, and overlapping input and output voltage ranges.

scholarly journals Electric Propulsion system on the basis of the matrix direct frequency converter

2015 ◽  
Vol 7 (2) ◽  
Author(s):  
Evgenij Koptjaev ◽  
Roman Evseev ◽  
Vyacheslav Balashevich
Keyword(s):  
Electric Propulsion ◽  
Output Voltage ◽  
Frequency Converter ◽  
Asynchronous Motor ◽  
Propulsion System ◽  
Mode Switching ◽  
Natural Mode ◽  
Propulsion Systems ◽  
Electric Propulsion System ◽  
Soft Start

Many of today's ships are equipped with electric propulsion systems, which leads to the relevance of the article. The general trend is the use of electric propulsion systems AC, due to a more robust design of an asynchronous motor and slightly better weight and dimensions. The use of asynchronous motor requires a static frequency converter for speed control and soft start. In the currently used PWM converters different types. Opportunities classical direct frequency converters are limited due to a number of fundamental shortcomings, particularly the lack of quality of the output voltage and the presence of the gap current during switching. Offered in Article electric propulsion system with direct frequency converter allows for a natural mode switching valves, as well as significantly improve the harmonic composition of output voltage and current of the inverter. The absence of a carrier frequency pulse-width modulation improves acoustics and electromagnetic compatibility with the ship's equipment. Mode powered by two independent generators improves vibro-acoustic characteristics.

Design of a hybrid propulsion system for a three wheeled bicycle

2015 ◽  
Vol 34 (1) ◽  
pp. 189-209 ◽  
Author(s):  
Vittore Cossalter ◽  
Alberto Doria ◽  
Marco Ferrari ◽  
Enrico Giolo ◽  
Nicola Bianchi ◽  
...  
Keyword(s):  
Electric Propulsion ◽  
High Efficiency ◽  
Propulsion System ◽  
Content Type ◽  
Hybrid Propulsion ◽  
Synchronous Reluctance Machine ◽  
Electric Propulsion System ◽  
Reluctance Machine ◽  
Dynamic Performances ◽  
Multi Body

Purpose – Velomobiles or bicycles cars are human-powered vehicles, enclosed for improving aerodynamic performance and protection from weather and collisions. The purpose of this paper is to design and develop a three-wheeled velomobile equipped with a hybrid human-electric propulsion system. Design/methodology/approach – The mechanical layout has been developed in order to improve safety, a CAD code has been used for the design and the dynamic performances have been studied by means of specific multi-body codes. The electric propulsion system has been designed both with analytical and FEM methods. Findings – A special three-wheeled tilting vehicle layout equipped with a four-bar linkage connection has been developed. A particular synchronous reluctance machine has been developed, which is very suitable for human-electric hybrid propulsion. A MATLAB code for integrated mechanical and electrical analysis has been developed. Originality/value – A new kind of light vehicle has been conceived. A new synchronous reluctance machine with high efficiency has been developed. A performance analysis in electric, human and hybrid working modes has been presented, which takes into account the specific features of both the electric motor and the pedaling legs. A prototype of the vehicle has been built.

scholarly journals A high efficiency non-inverting multi device buck-boost DC-DC converter with reduced ripple current and wide bandwidth for fuel cell low voltage applications

2018 ◽  
Vol 15 (2) ◽  
pp. 165-186
Author(s):  
Naik Venkatesh ◽  
Paulson Samuel
Keyword(s):  
Steady State ◽  
Fuel Cell ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Input Voltage ◽  
Boost Converter ◽  
Prototype Model ◽  
Voltage Range ◽  
Operating Modes

The voltage produced by the fuel cell (FC) device is unregulated and varies from 0.4 V to 0.8 V on full load to no-load respectively. When these devices are used in low voltage applications and output voltage lies between higher and lower values of input voltage range, it is required to connect a DCDC buck-boost converter to get a fixed output voltage. In this paper, a new noninverting multi device buck boost converter (MDBBC) is proposed, in which the multi device buck and boost converters are connected in cascade and operate individually either in buck or boost operating modes. The paper also includes the steady state analysis of MDDBC based on the state space averaging technique. A prototype model of proposed converter compatible with FCS-1000 Horizon FC model with rating of 270 W, 36 V is designed and developed. The proposed converter is experimentally validated with the results obtained from the prototype model, and results show the superiority of the converter with higher efficiency and lesser ripple current observed under steady state operation of the converter.

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