Reduced‐order small signal modelling of high‐order high step‐up converters with clamp circuit and voltage multiplier cell

Abstract

Generally, the modelling of high step-up converters with a large number of passive components consisting of inductors, coupled-inductors (CL) and capacitors is very complex. Recently, to further increase the voltage gain in high step-up converters in a simple and low-cost manner, voltage multiplier (VM) circuits have been increasingly used. Also, to reduce the switch voltage spike, clamp circuits are applied. This leads to an increase in the order of systems and operational modes as well. Thus, for simpler modelling and reducing the state variables, the use of reduced-order techniques are required. A general structure for small signal modelling of such converters including passive clamp, CL and VM circuits is presented. For this purpose, an example of these types of converters is selected. At first, a full-order model of this high-order converter is derived using the state-space averaging method. Then, two reduced-order models of the converter are derived and then compared with the full-order model. Also, the small signal and low frequency behaviour is evaluated. In addition, the impact of the parameter variations on the frequency response and stability margin is investigated. Finally, experimental results based on laboratory prototype are presented to verify the validity of the theoretical analysis.

Analysis of a New Soft-Switched Step-Up Trans-Inverse DC/DC Converter Based on Three-Winding Coupled-Inductor

“…Also, for the non-conservative of the model, the parasitic resistance of the input inductor (rLin) is considered because of the high input current level in the input section of the converter. The state vector of the proposed converter is defined as: After applying the weighting factors on the state equations and then superimposing small ac perturbations same (as the procedure described in [30]), the transfer functions input-tooutput voltages (vo/vin) and control-to-output voltage (vo/d) are obtained. The bode plot diagrams of transfer functions vo/vin and vo/d of the proposed converter along with conventional SEPIC are illustrated in Fig.…”

Model Reduction by Generalized Falk Method for Efficient Field-Circuit Simulations

“…Reduced-order models have been developed in many areas of engineering, such as circuits (e.g., [1][2][3][4]), power systems (e.g., [5][6][7]), electromagnetics (e.g., [8][9][10]), fluid mechanics (e.g., [11][12][13]), nonlinear structural mechanics and earthquake engineering (e.g., [14]), nonlinear hydraulic fracturing problems (e.g., [15]), etc., to cite a few. Deep-learning artificial neural networks have been introduced to build on more traditional model-order reduction methods, such as the Proper Orthogonal Decomposition (POD), 1 to increase computational efficiency [16][17][18][19][20][21].…”

“…There are many applications of semiconductors in power electronic devices used in data centers, electric vehicles, renewable energy (solar, wind, wave and tidal power). An important real-world application system is the Tesla Model S, 3 for which the wheels are turned by an induction motor driven by a 3-phase AC generated by a motor inverter taking as input the DC from its battery pack; see Fig. 1.…”

“…At the detailed component level, the design of the Tesla motor inverter relied on IGBTs, 4 [44][45][46][47][48]. 3 See, e.g., the video "How does an Electric Car work? Tesla Model S" Youtube, from time 3:56, where the motor inverter and the induction motor correspond to the motor drive and the electric motor/generator in Fig.…”

Design of a switched‐capacitor boost converter utilizing magnetic coupling with capability of right‐half plane zero elimination

“…Also, interleaved configuration-based converters with ultra-large step voltage ratio have been reported in [18,19] and dc/dc converters with cascade quasi-Z-source networks have been presented in [20,21]. Other topologies that incorporate with voltage multiplier cells for increasing the voltage transfer gain are analysed in [22,23].…”