Comparative study between peak current mode and hysteretic current mode control of a single–ended primary inductance converter

Abstract

Dc-dc converters have been reported as exhibiting a wide range of bifurcations and chaos under certain conditions. In this study, the analysis of bifurcation in a peak current-controlled single-ended primary inductance converter (SEPIC) topology operating in the continuous conduction mode is performed and is compared with the hysteretic current mode control. The stability of the system is analysed by varying the reference current. The locii of the complex eigenvalues and the characteristic multipliers indicate that the one-periodic orbit loses its stability via period-doubling bifurcation. A hysteretic current-controlled SEPIC converter that uses the sum of the two inductor currents as a control variable is discussed. The operation states of the converter are studied based on the theory of sliding mode control. A computer simulation using MATLAB/SIMULINK confirms the predicted bifurcations and the experimental results show that stable periodic operation is obtained for a wide variation in parameter.

Non‐linear modal analysis of transient interaction behaviours in SEPIC DC–DC converters

“…Influence of circuit parameters on fundamental modes: Fundamental modal sensitivity analysis approach [4,21,22] is a powerful and effective method to assess the impact of system parameters on the fundamental modes, which is derived as follows:…”

“…In (21), That is, the indices I2 kl j can comprehensively consider the amplitude and duration of interacted modes so that these indices are able to measure the influence of non-linear transient interactions [19]. Theoretically, five fundamental modes can give rise to 25 second-order interacted modes in SEPIC converters.…”

Pulse train controlled quadratic buck converter operating in discontinuous conduction mode

“…In spite of several control schemes are in vogue, still there is the prevalence of anomalous behaviour in such systems. With different control strategies, the converter undergoes various dynamical behaviours which has been extensively studied and reported in [2][3][4][5][6][7][8]. Hence, its comprehensive steady-state control performance is essential to provide a route path for engineers in the design perspective.…”

Fixed‐frequency adaptive on‐time buck converter with ramp compensation

“…However, slope compensation is required to stabilise the system when duty cycles are >0.5 [8,9], and load transient response speed is limited with fixed frequency control. Therefore, constant on-time mode [10][11][12], constant off-time mode [13,14], and hysteretic current mode [15][16][17][18] are introduced, which possess the advantage of fast transient response. However, they lead to a variable frequency when the input voltage or the output voltage is changed.…”