Input Current Ripple Reduction Approach for the Interleaved Boost Converter

Fuel cells are being increasingly used in wide range of applications for stand-alone and grid connected systems due to their high efficiency and low emissions. A power conditioning unit, consisting of DC-DC converter and an inverter, is invariably used as an interface between the fuel cell and the load in a typical fuel cell system for ac applications because of unregulated nature of fuel cell voltage. In this research, a comparative analysis of different input ripple reduction methods, input current ripples, the output voltage ripples, and the size of passive components with high efficiency compared with the other topologies is done. The different dc/dc converter topologies is compared such as conventional Boost Converter (BC), Multi Device Boost Converter (MDBC), and Two-Phase Interleaved Boost Converter (IBC), Multi Device Interleaved Boost Converter(MDIBC) to verify its dynamic performance. The DC-DC converter topologies are designed and investigated by using MATLAB/Simulink. The simulation and experimental results have signified that interleaved converter topology is more efficient than other dc-dc converter topologies in achieving high performance and reliability for high-power dc-dc converters.

Analysis and minimization of input current and voltage ripples of five-phase PWM inverters are presented in this paper. The analytical expressions for the RMS value of input current and voltage ripples as a function of the PWM reference signal are derived. Different to three-phase PWM inverters, it is shown that pure sinusoidal is the optimum reference signal that produces minimum input voltage ripple. Input current ripple does not depend on the employed reference signal so the ripple canpsilat be minimized by changing reference signal. Simulation and experimental results verify the analysis.

In this paper we will suggest equipment for a portable field hospital that is electrically fed by solar panels. The solar panel is connected to the removable (Portable) field hospital via an interface, which is an Interleaved Boost Converter (IBC). The analytical study is carried out for the traditional Boost Converter(BC) and the Interleaved Boost Converter (IBC) using Matlab/Simulink To ensure the electric supply of the portable field hospital with suitable voltage values. The paper will explain what might happen if we doubled or tripled the main elements of the conventional boost converter. The expected results will reflect the implementation importance of the interleaved converter (IBC) in comparison with conventional converter. We will also compare the different types of interleaved converter (IBC), so that we get the best interior connection of the IBC, which achieves the suitable distribution of the total current between the coils, as well as the best size – weight specifications. The selected IBC will contain less ripple in the output voltage waveform, where we provide the potable field hospital feed without disturbances or breakdowns, which cause the IBC to be out of serves or fault occurring to any part of it.

In this paper, the design and development of a novel interleaved tri-state boost converter (ITBC), which produces lower ripple and exhibits better dynamic response, is discussed. Boost converters are frequently connected in parallel and operate in an interleaving mode for the reduction of ripple content in source current and in output voltage. In this way, interleaved boost converter (IBC) is conceived, which improves the power handling capabilities and increases the overall system rating. It also has the advantage of reduction of the ripple content in source current and output voltage, but when control-to-output transfer function of IBC is derived under continuous conduction mode of operation, then a right-half-plane (RHP) zero appears in the transfer function. Due to the presence of RHP zero, IBC has nonminimum phase problem, which deteriorates the dynamic performance. The tri-state boost converter (TBC) is the best choice for RHP zero elimination, but due to the extra freewheeling mode, ripple content will also be increased. The proposed converter is a parallel combination of two TBC and operates in an interleaving mode. Therefore, the proposed converter has both of the advantages of TBC and IBC. The performance analyses of ITBC, TBC, and IBC have been studied based on simulation and experimental results. From the comparative analysis, it is observed that ITBC is performed better than other two converters. The ripple comparisons between three converters have also been done. It is found that the ripple content in ITBC is slightly greater than IBC but is less than TBC.

A novel dual-switch forward converter with input current ripple reduction, one of Taiwan Tech converters, is derived from a tertiary-winding forward converter by inserting a clamping capacitor between two identical primary windings and modifying with two series-connected MOSFETs and diodes. Lossless snubbing, voltage clamping, voltage sharing, and input current ripple reduction features are obtained under steady-state and transient conditions. Moreover, low voltage rating MOSFET accompanied with lower equivalent RDS(on) results in the reduction of the conduction losses. Furthermore, the reduced EMI filter components can be used to meet the EMI regulation due to the reduction of the pulsating input current-ripple. Consequently, it is suitable for high input-voltage, high efficiency, and high power density power conversion applications. To demonstrate its feasibility, the operation principle and the experimental results of the proposed converter with 300–400 V input and 50V/5A output power are described.

In this paper a novel approach is that the switches in parallel used to develop a interleaved boost dc-dc converter and pulse width modulation integrated circuits (PWM ICs) are used in order to maintain phase difference between switching pluses are 180°. These dedicated ICs makes closed loop operation of interleaved boost converter(IBC). With the input voltage about 52V and the output voltage about 218V with it can drive the load about 500W, with an efficiency of about 90%. In place of battery it can be replaced by solar string and with four batteries of each 12V with high current rated can be used to drive high power load with continuous conduction mode(CCM) of operation. In the following simplified schematic is included along with proposed circuit, the input and output filters can be smaller due to ripple current cancellation. Authors of this contribution report a simulation and hardware results of proposed topology of a two stage IBC with it has been shown that the size and cost can be minimized, possible extension to multiple topologies is indicated.

To utilize the maximum power generated by the solar panel, it is required to match its internal resistance with that of the load. Because it has nonlinear internal resistance which varies as the intensity of light falling on the panel varies. In this paper boost converter interface is used as Maximum Power Point Tracker (MPPT) to match the source with the load. The problem in using high frequency converter interface is that high frequency ripple interaction with Photovoltaic system. To reduce the ripple, Interleaved Boost Converter (IBC) is considered. The advantages of IBC compared to the conventional boost converter are low input ripple current, high efficiency, faster transient response, reduced electromagnetic emission and improved reliability. The performance of two cell IBC with non-coupled, coupled and inverse coupled inductors with R and RL loads has been presented in this paper. Comparative results have been presented with simulation results with the help of MATLAB software.

This letter is to present a Δ-Y hybrid impedance network based boost converter with reduced input current ripple. Comparing to the existing impedance network based boost converters to enhance the output port characteristic, i.e., voltage conversion ratio, of the traditional boost converter (TBC), the proposed converter applies the impedance network to improve its input port performance, i.e., the input current ripple issue. The proposed Δ-Y hybrid impedance network consists of the TBC's main inductor, an additional coupled inductor, and an additional resonant inductor and capacitor pair. Although the peak currents flowing through the diode and the switch are higher in comparison to the TBC, the proposed converter can remain TBC's voltage conversion feature and effectively reduce the input current ripple and the average current of the main inductor with the application of the Δ-Y hybrid impedance network. The operating principle of the proposed converter is explained and the principle of current ripple reduction is analyzed in detail. Experimental results from a prototype are carried out to validate the effectiveness of the proposed converter.

High efficiency interleaved boost converters (IBC) are required to interface the low voltage input to high power load like fuel cell vehicle, hybrid electric vehicle and photo voltaic applications. This paper analyzes the effect of coupled inductor on the performance of three level IBC (TLIBC). The duty cycle of the IBC is varied by proportional –integral controller. Converter circuits were simulated by MATLAB and the outcome confirms that IBC performance has been improved.

Comparison of the input filter effect to PV panel by SEPIC MPPT converter

This paper considers input current-ripple reduction on Pulse-link DC-AC converter for fuel cells applications operated by zero-current-slope mode. For reducing the input current-ripple, series LC circuit has been connected in parallel at the Pulse-link DC-AC converter. The input current-ripple characteristics have two main domains with combination of series LC parameters. The current-ripple level depends on inductance values. Input current-ripple is reduced when the inductor current flown at series LC circuit has zero-slopes in one switching period. At that time, small parameters values can be achieved.

A modular high power high gain, non-isolated DC-DC boost converter accompanied by twin coupled-inductors is presented in this proposed paper. DC-DC converters serve to the requirements of multiple applications such as automotive systems, sustainable energy based applications and multiple dc-back up energy units. The proposed topology of converter comprises of hybrid combination of interleaved boost converters(IBC), twin coupled-inductors(Cis), voltage multiplier unit(VMU). IBC to reduce stress on switches, and lower the input current ripples, twin coupled-inductors connected in series for voltage gain and current balancing, voltage multiplier unit to boost up the output voltage and get high gain. The main significant trait like voltage-gain, stress on diodes and switches, turns-ratio, component design, utilization factor, and efficiency are summarized. The circuit layout, operational aspects, simulation results and performance analysis of 60 V/1.4 kV, 3kW, 100kHz proposed converter are presented.

This paper deals with a new single-stage high boost quasi-Z-source inverter based on the active switched Z-impedance network. The proposed inverter provides higher voltage boost factor, draws continuous input current, and shares the same ground between the input source and the bridge inverter. Compared with the traditional enhanced boost (quasi-)Z-source inverters (EB-ZSI/EB-qZSI), for two less inductors, one less capacitor, and one additional active switch used at the impedance network, the output voltage boost factor of the proposed inverter is twice as much as the EB-ZSI and EB-qZSI, which implies that it can use a very higher modulation index to provide improved quality output waveforms. Besides, for obtaining the same dc-ac output voltage gain, the proposed method has lower active switching voltage stress, lower passive component voltage ratings, and lower shoot-through current stress with lower input current ripple. The operation theory analysis, power loss calculation, simulation results, and performance comparison with other high boost impedance source inverters are presented. To verify the operating theory of the proposed inverter, a laboratory prototype based on the TMS320F28335 DSP was constructed and tested with 60 V dc input and ac 110 Vrms phase output. Finally, both simulations and the experimental results confirmed that the proposed inverter has high boost voltage inversion capability.

Multiphase dc-dc converters are widely used in power electronics. In the case of generating multiple output voltages from a common input voltage, converters have to operate at non-uniform duty cycles. This is challenging in regard to input current ripple minimization, as control techniques for interleaved operation of asymmetric converters are not well understood. In this paper, analytic formulas are derived to obtain uneven phase-shift angles for optimal ripple minimization. Simulations verify the performance of the proposed technique and compare it to conventional methods.

This paper proposes a high gain interleaved boost converter (IBC) for universal line PFC applications. It is realized by interleaving two conventional boost converters. It is capable of operating at three different duty regions, $0\leq \mathbf{D}\leq 0.5, 0.5\leq \mathbf{D}\leq 1$ and $0\leq \mathbf{D}\leq 1$ to produce high voltage gain as compared to the conventional IBC. The three different duty regions occurred due to switching logic applied on the two controlled switches of the proposed converter. Detailed mathematical modeling of the proposed converter is carried out, and its steady-state behavior is verified through scaled down laboratory prototype.