Rodrigo Loera-Palomo

Analysis of Quadratic Step-Down DC-DC Converters Based on Noncascading Structures

In the technical literature has been reported the array of dc-dc basic switching converters to increase power handling capabilities on dc-dc applications. In this paper, switching step-down dc-dc converters based in the principle of reduced redundant power processing (R2P2) are presented. This principle states that the non-cascading connection of dc-dc basic converters increases the efficiency on array of converters, from the theoretical point of view. The resulting converters are formed by a pair of L-C networks and a pair of active switches. Also, they have wide conversion ratios and quadratic dependence with respect to the duty ratio. Voltage conversion ratios and steady-state operating conditions are derived. Simulations and experimental results are given to verify the converter characteristics.

Design methodology for quadratic step-down dc-dc converters based on non-cascading structures

This paper deals about a design methodology of a family of quadratic step - down converters based on the reduced redundant power processing principle (R2P2). Here, it is included the expressions for the selection of passive elements, as well as, the expressions of average and maximum values of voltage and current useful to select properly the semiconductor elements. The aim of this paper is to develop a methodology for R2P2 converters under an operation in Continuous Conduction Mode. Simulations in PSpice verifies the results.

Optimized design of a quadratic boost converter based on the R 2 P 2 principle

In this paper is presented the optimal design of a switching boost converter based on the reduced redundant power processing (R2P2) principle. Using the NSGA-II optimization method is found a set of optimal combinations for the converter parameters (inductors and capacitors), such that the open loop performance of the converter is improved. The constraints associated to current/voltage ripples and zero-pole locations are used to improve the design. Simulation results show that the optimized converter can be easily controlled with only one control loop.

Maximum power point tracker based on PFC control scheme

A maximum power point tracking (MPPT) scheme based on a power factor correction (PFC) strategy that uses a multiplier approach is presented. The purpose is that the switching converter behaves as a resistor seen by the photovoltaic module, and thus regulate the input voltage to a desired value. Moreover the multiplier approach considers an inner current loop and an outer voltage loop. In order to obtain a stable closed-loop system, a procedure to determine the bounds of controller parameters is developed. Finally, the control scheme is validated through simulation results.