Design of a Boost Power Factor Correction Converter Using Optimization Techniques

Typically, a power-factor-correction (PFC) power supply consists of two stages, one responsible for PFC and the other for voltage regulation. In this paper, we propose to use a constant power sink to represent the voltage regulating stage, resulting in an analytically tractable model that is able to predict the period-doubled oscillations at line frequency that are not detectable by other conventional models. Using a generalized averaging approach, we investigate the low-frequency dynamics and derive closed-form stability conditions that accurately locate the stability boundaries on selected parameter planes. The model can be conveniently used to evaluate the performance of PFC power supplies, such as harmonic distortion and power factor. Experimental results are presented to verify the model.

Section: Applicationsmentioning

confidence: 99%

Line-Frequency Instability of PFC Power Supplies

Chu

Tse

Wong

2009

“…This problem was also reported in previous research [2], [4], [25]. In order to avoid the optimization to be trapped at the local minima, the switching frequency is kept constant in each optimization branch.…”

Section: A Fixed Switching Frequency Branchesmentioning

confidence: 87%

“…It can be implied by (25) that the DC resistance of the inductor is proportional to the square of the inductor value. Since the current ripple of the output inductor is smooth, the frequency harmonics is summed up to the 5 th harmonics to calculate the copper loss of the inductor, given by (27).…”

Section: Output Inductormentioning

confidence: 99%

Two-Stage Optimization Method for Efficient Power Converter Design Including Light Load Operation

Yu¹,

Pong²,

Ling

et al. 2012

Power converter efficiency is always a hot topic for switch mode power supplies. Nowadays, high efficiency is required over a wide load range, e.g., 20%, 50% and 100% load. Computer-aided design optimization is developed in this research work, to optimize off-line power converter efficiency from light load to full load. A two-stage optimization method to optimize power converter efficiency from light load to full load is proposed. The optimization procedure first breaks the converter design variables into many switching frequency branches. In each fixed switching frequency branch, the optimal designs for 20%, 50% and 100% load are derived separately in the first stage, and an objective function using the optimization results in the first stage is formed in the second stage to consider optimizing efficiency at 20%, 50% and 100% load. Component efficiency models are also established to serve as the objective functions of optimizations. Prototypes 400V to 12V/25A 300W two-FET forward converters are built to verify the optimization results.

“…The most common objective functions to minimize are weight [98,99,[102][103][104], cost [32,99,102,[104][105][106][107][108], volume [102,[108][109][110], emitted radiations and thermal resistance of a heatsink [111], area [104,105] and power losses. Alternatively, the optimization can be achieved through efficiency maximization [57, 69, 98, 99, 101, 103-105, 108-110, 112-115].…”

Section: B Control Tuningmentioning

confidence: 99%

Metaheuristic Optimization Methods Applied to Power Converters: A Review

León-Aldaco

Calleja

Aguayo

2015

160

Power converters systems aimed at renewable energy applications have become a common option for sustainable electricity and distributed generation, since their performance has improved, and prices have steadily been reduced in the last years. However, there are still several drawbacks that hinder their widespread installation, such as the simultaneous minimization of cost and volume, efficiency maximization, size reduction, etc. Quite often, accomplishing these goals requires dealing with complicated optimization problems, which are difficult to solve by classical methods. Metaheuristic techniques provide a viable alternative to solve complex, intricate optimization problems, such as those encountered in the development of power electronics converters. This paper presents a comprehensive coverage of metaheuristic methodologies applied in the area of power converters. The review includes a classification of the methodologies and main objective functions in each paper surveyed. An aim for this paper is to highlight the importance of the optimization tools, and the many benefits they provide to tackle the challenges encountered in the design, operation and control of power converters. O 0885-8993 (c)