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In this paper a sixth-order low-voltage gain buck converter is introduced. In this converter a high degree of freedom in achieving the performance trade-offs, both in steady-state and dynamic, is possible due to sixth-order nature. The voltage gain of this converter is almost half of the conventional buck converter. A time-domain and state-space analysis is adopted to predict the detailed performance...
In this paper, a H∞ robust controller is designed for high-gain boost converter (HGBC) using mixed-sensitivity method. This controller design is based on the model, which uses a linear time-invariant approximation of nonlinear time-variant PWM converter that describes approximately the behavior of the system. The design of voltage-mode controller for boost converter is challenging, as its duty cycle...
In this paper a dc-dc non-linear-gain quadratic type boost point of load converter is proposed. A detailed time-domain and steady-state analysis is presented to examine the proposed converter performance. Non-linear voltage boosting features are established and then the L, C components defining equations are formulated in terms of ripple quantities. The state-space models are established assuming...
A high gain fourth-order boost converter is formulated by cascading a charge-pump with diode of the conventional boost converter. The added charge-pump is simple in structure, combination of two capacitors and two diodes, and easy to integrate with boost topologies. Its gain is almost two times of the conventional boost converter. At moderate duty ratio the converter is able to step-up a lower source...
In this paper, a fourth-order non-isolated bidirectional converter is proposed for load power management in low-voltage DC grid. With state-space and discrete-time modeling technique, the proposed bidirectional converter is modeled, and small-signal transfer functions are obtained. A digital compensator is designed using these transfer functions both for the charger and discharging cases. The converter...
In this paper a zero-voltage, zero-current high boosting converter using an auxiliary soft-switching network is presented. The high boost ratio is realized by an interleaved boost converter with charge-pump on the load side. Due to the parallel structure of the converter, the auxiliary soft-switching network is capable of providing both zero-voltage and zero-current transitions to the main switches...
In this paper, a fifth-order buck converter facilitating higher bucking operation is proposed. This topology has a step down gain which ideally varies between 0 and 1 for respective minimum and maximum duties of operation. In order to justify the effectiveness of this topology, a steady-state analysis has been carried out and design equations for converter circuit parameters have been obtained. A...
A fourth-order boost point of load converter capable of giving a higher voltage gain similar to fourth-order converters is proposed in this paper. In view of the higher boosting feature, the converter is more suitable to interface the given low voltage source to the high-voltage dc-bus. Component design expressions are formulated through a steady-state analysis. The boosting factor of the proposed...
A robust controller is designed for high-gain boost point of load converter. In view of the high-gain characteristic, the converter gives freedom of connecting a smaller battery source to a larger voltage dc-bus, but more sensitive to uncertainties. To accommodate the uncertainties and to ensure voltage regulation a robust bode method is used in the controller design. The boosting features are demonstrated...
In this paper a zero-voltage transition low current ripple fifth-order boost converter is proposed which offers significant advantages over conventional second-order boost converter. The fifth-order converter provides higher voltage level at lower duty ratios and the ripple at input and output is also reduced. The zero-voltage transition cell which is also incorporated into the circuit provides further...
An alternate approach towards realizing a Fifth Order ZVT Boost Converter has been explored in this paper. The advantage of high voltage-gain of the fifth order converter has been utilized by exploiting the Zero Voltage Transition (ZVT) technique, which allows reasonable full load efficiency at higher-frequency operation. The modes of operation of the converter have been identified thereby establishing...
A quantitative feedback theory based systematic design procedure is proposed for two-inductor boost dc-dc converter. The two-loop design proposed in this paper is effective in handling the uncertainties, both in model as well as in converter parameters. Compatible models are formulated, in discrete-time domain, to achieve this task. Minimum stability margin is enforced so as to keep the system within...
A high-gain boost point of load converter is proposed for point of load applications. In view of the high-gain characteristic, the converter gives freedom of connecting several smaller battery sources to a common dc-bus. The boosting of the proposed converter is higher than the traditional boost and some of the fourth-order boost converters. These boosting features are demonstrated through a steady-state...
A zero-voltage transition network is proposed for a high-gain boost converter. The high-gain is realized by an interleaved boost converter with charge-pump on the load side. An auxiliary zero-voltage transition network; comprising a switch; an inductor and three diodes; is proposed to realize zero voltage turn-ON of the main switches. The resonating inductor of the auxiliary circuit creates resonance...
A fifth-order boost converter design and optimization is presented in this paper. Normally, energy storage elements of the converter are designed keeping the ripples within the limits. Design of the fifth-order boost converter on the basis of ripple constraints alone may result in inferior dynamic performance. In order to meet both dynamic and steady-state performance ripple constraints an ANT colony...
A zero voltage transition fifth-order boost converter is proposed in this paper. This proposed converter gives a voltage gain close to twice the conventional boost converter. It is a single switch topology, which undergoes zero-voltage transition during the switch OFF to ON-state transition. Furthermore, the zero-voltage transition is realized here through an LCS-cell consists of a Lr−Cr resonating...
In this paper, a high gain modular multilevel dc-dc converter topology is proposed. As compared with the conventional modular multilevel step-up converters, the proposed converter offers an additional degree of control-freedom and higher steady-state voltage gain. The proposed converter operates in continuous conduction mode. A detailed small-signal modeling for the proposed converter based on state-space...
In this paper a particle swarm optimization (PSO) based controller design is proposed for fifth-order boost point of load dc-dc converter. Mathematical analysis reported in ref[7] used to formulate the system transfer function. A two-pole two-zero digital controller is designed using the PSO algorithm. As the controller is meant for load voltage regulation with a minimum steady-state error an integral...
Design and analysis of a new low source current ripple soft-switching boost converter is presented in this paper. This converter not only exhibits higher boosting but also the switching devices undergo zero-voltage transition. The zero-voltage transition for the switching devices is realized through a resonating inductor, and a capacitance connected across the device. Detailed steady-state analysis...
A new two-input dc-dc converter for power management in dc grid is presented in this paper. This two-input converter is evolved through the combination of Boost and SEPIC converter. Steady-state and state-space analysis is performed to understand the performance of the proposed converter and then to design appropriate digital controllers for better power management. Using relative gain array theory...
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