Models that accurately predict the output voltage ripple magnitude are essential for applications with stringent performance target for it. Impact of the dc input ripple on the output ripple for a frequency-controlled...
详细信息
Models that accurately predict the output voltage ripple magnitude are essential for applications with stringent performance target for it. Impact of the dc input ripple on the output ripple for a frequency-controlled series resonant converter (SRC) using a discrete-domain exact discretization modeling method is analyzed in this paper. A novel discrete state-space model along with a small-signal model for the SRC considering three state variables is presented. The audiosusceptibility (AS) transfer function that relates the input-to-output ripple is derived from the small-signal model. Analysis of the AS transfer function indicates a resonance peak and an expression is derived connecting the AS resonance frequency for the input ripple based on the SRC component values. Further analysis is done to show that a set of values for the SRC parameter exists, which forms a design space, for which the normalized gain offered by the SRC for the input ripple is less than unity at any input ripple frequency. A test setup to introduce the variable frequency ripple at the input of the SRC for the experimental evaluation of the AS transfer function is developed. Influence of stray parameters on the AS gain, AS resonance frequency, and on the SRC tank resonance frequency is evaluated. An SRC is designed at a power level of 10 kW. The analysis using the derived analyticalmodel, simulations, and experimental results are found to be closely matching.
Converter topologies of Switch Mode Power Supplies, for example in consumer products, have to fulfill many specifications and demands especially in matters of efficiency and low overall costs. In order to optimize the...
详细信息
ISBN:
(纸本)9781538651537
Converter topologies of Switch Mode Power Supplies, for example in consumer products, have to fulfill many specifications and demands especially in matters of efficiency and low overall costs. In order to optimize these converters, simulation methods have to be found that predict their real behavior accurately within short simulation time. However, simulation accuracy often suffers from neglection of nonlinear component characteristics, especially nonlinear capacitances associated with semiconductor devices. Integrating them in Sample datamodeling generates a simulation method that achieves both goals, short simulation durations and results close to reality.
This note considers stability analysis of a class of pulsewidth modulated (PWM) systems that incorporates several different switched mode dc-de- converters. The systems of the class typically have periodic solutions. ...
详细信息
This note considers stability analysis of a class of pulsewidth modulated (PWM) systems that incorporates several different switched mode dc-de- converters. The systems of the class typically have periodic solutions. A sampleddata model is developed and used to prove stability of these solutions. Conditions for global and local exponential stability are derived using quadratic and piecewise quadratic Lyapunov functions. The state space is partitioned and the stability conditions are verified by checking a set of coupled linear matrix inequalities (LMIs).
The Steady-state MNA method establishes steady-state analysis of AC power converters which contain linear elements. This method is easier to implement than state equations and allows the calculation of a transition ma...
详细信息
ISBN:
(纸本)0852965877
The Steady-state MNA method establishes steady-state analysis of AC power converters which contain linear elements. This method is easier to implement than state equations and allows the calculation of a transition matrix without approximation. The MNA method offers equations with a better observability than conventional state space steady-state modeling. The steady-state MNA method is also suitable for sampled data modeling.
暂无评论