Power loss model for efficiency improvement of boost converter (original) (raw)
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Analytical power losses model of boost rectifier
IET Power Electronics, 2014
An analytical power losses model of boost rectifier is presented in this study. A power losses model that takes into account both continuous and discontinuous current modes is derived. The analytical expressions of conduction and dynamic losses, including losses in inductor core and winding, are given. Also, equivalent input resistance, which models single-phase and three-phase rectifiers' power losses, is modelled. The model is verified through simulations and experimental measurements on single-phase boost rectifier that is used in wind turbine with permanent-magnet generator.
An algorithm for boost converter efficiency optimization
2013 XXIV International Conference on Information, Communication and Automation Technologies (ICAT), 2013
In this paper, an algorithm based on the technique of variable switching frequency is applied, so that working point of boost converter is at the boundary between continuous and discontinuous working mode aiming at achieving maximum efficiency of the converter. Controller is based on variable switching frequency and measuring the voltage on the main converter switch. The proposed algorithm is verified by the simulations and experimental measurements on a converter prototype.
Design and Analysis of an Efficient Boost Converter for Renewable Energy Sources
Renewable energy is evolved from natural sources. Photovoltaic (PV) and fuel cells are commonly used Renewable energy sources. A derived DC-DC converter is suggested for efficient renewable energy sources. An efficient Boost converter (BC) topology is discussed in this paper for renewable energy sources. The merits of this topology are reduced EME (Electromagnetic emission), fast transient response and low input current ripple. In suggested topology, 2 identical inductors and an auxiliary inductor are used to reduce the switching loss and switching stress of BC connected with PV system, used PWM technique for triggering the switches. The performance of BC along with PV system is analyzed by Matlab/Simulation software.
Modelling, Analysis, Simulation and Experimental Results Regarding a New Boost Converter Topology
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Optimization of Switching Loss of a DC-DC Boost Converter
International Journal of Recent Technology and Engineering (IJRTE), 2019
The dc-dc boost converters are widely used in various power conversion applications because of their increase in demand both in domestic, commercial and industrial applications. The voltage boosting techniques include mostly combination of components such as inductors, capacitors, switches etc with their various configurations. The combination of these boosting components oriented in different configurations appears largely in literature, but refer the techniques of hard-switching of the semi-conductor devices. In order to meet the growing demand and to look into the aspect of better efficiency of these converters, the soft-switching of devices plays a prominent role, which lacks in literature. Though very few papers appear in literature as far as soft-switching is concerned, but the addition of more than one or two switches make the things uneasy and the researchers lack interest in it. Even though the conventional boost converters appear in various forms of topologies in literatur...
Efficiency optimization of a single-phase boost DC-DC converter for electric vehicle applications
One of the main problems in autonomous electric vehicles is the energy storage, because a high autonomy and high power condition demand large mass, big volume and high cost of the storage unit. Consequently, in order to avoid power losses and to downsize the storage unit and the electric systems, the electric power train in the vehicle must be as efficient as possible. This paper proposes a methodology to optimize the efficiency of a DC-DC converter that interface the storage unit with the motor's drive. In this way, with the purpose of increasing the efficiency, this methodology combines three techniques: 1) The use of low-loss components such as Si CoolMos, GaN and SiC diodes and Mosfets, and Multilayer Ceramic Capacitors, 2) a complete power loss analysis as a function of the switching frequency and a calculation method of core losses based on the approximation of Fourier Series, and 3) the Area Product Analysis of magnetic components. With this methodology, it is possible to achieve high efficiency and high power density, which is suitable for automotive applications. The methodology has been verified with a set of tests on a 1kW prototype. As a result of the proposed methodology, a power efficiency of 99% was experimentally obtained.
Reliability Analysis and Performance Degradation of a Boost Converter
IEEE Transactions on Industry Applications, 2014
In general, power converters are operated in closed-loop systems, and any characteristic variations in one component will simultaneously alter the operating point of other components, resulting in a shift in overall reliability profile. This interdependence makes the reliability of a converter a complex function of time and operating conditions; therefore, the application may demand periodic replacement of converters to avoid downtime and maintenance cost. By knowing the present state of health and the remaining life of a power converter, it is possible to reduce the maintenance cost for expensive high-power converters. This paper presents a reliability analysis for a boost converter, although this method could be used to any power converter being operated using closed-loop controls. Through the conducted study, it is revealed that the reliability of a boost converter having control loops degrades with time, and this paper presents a method to calculate time-varying reliability of a boost converter as a function of characteristic variations in different components in the circuit. In addition, the effects of operating and ambient conditions have been included in the reliability model as well. It was found that any increase in the ON-state resistance of the MOSFET or equivalent series resistance of the output capacitor decreases the overall reliability of the converter. However, any variation in the capacitance has a more complex impact on the converter's reliability. This paper is a step forward to the power-converter reliability analysis because the cumulative effect of multiple degraded components has been considered in the reliability model.
International Journal of Engineering Research and Technology (IJERT), 2019
https://www.ijert.org/Closed-Loop-Power-Conversion-Efficiency-Improvement-of-AC-DC-Boost-Converter-using1:1Transformer https://www.ijert.org/research/closed-loop-power-conversion-efficiency-improvement-of-ac-dc-boost-converter-using1:1transformer-IJERTCONV7IS02048.pdf This paper proposes a circuit structure that can improve the power conversion efficiency of an AC-DC boost converter with closed loop control technique. The circuit uses a 1:1 transformer and a voltage boost circuit composed of an inductor, a capacitor, a diode, a MOSFET, a PIC microcontroller ,a voltage sensor and a PI controller. This project describes the new type of ac dc boost converter with high voltage conversion ratio. The transformer forces the converter to operate in continuous conduction mode for input current, and there by reduces input ripple, power loss due to turn-ON of switch and reverse recovery of diode is minimized. This proposed converter improve the voltage gain with reduced stages when compared with conventional converter. The proposed converter has high ηe over a wide range of ac input voltage Vac: ηe = 92.9% at Vac = 85 V and ηe = 97.4% at Vac = 264 V, when the converter was operated at dc output voltage of 400 V and output power of 500W.
A Novel DC-DC Boost Converter Design for Higher Conversion Efficiency
This paper presents the development of a DC-DC boost converter. In the proposed boost converter design, a passive regenerative snubber circuit is included to absorb the energy of stray inductance so as to reduce the IGBT switching losses. MATLAB simulation as well as an experiment results are conducted to validate the proposed device. The results show that the proposed boost converter design gives an efficiency of 93% which is better than the conventional converter (88%).
Theoretical Study on Performance Constraints of a DC-DC Boost Converter
This paper investigates the effect of the variation of duty ratio on the different performance parameters of a non-isolated dc-dc boost converter. Five important parameters dependent on the duty ratio have been identified namely output voltage, output current, effective impedance at the input, minimum inductance and minimum capacitance for continuous conduction mode (CCM). The effect of variation duty ratio on the performance of these parameters is investigated and reported. The study also takes into consideration the relation of duty ratio with switching period, which in turn affects the duty ratio.