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Uninterruptable power supplies (UPS) units are basically used in almost all military applications with preferred voltages of 36V DC and 48V DC. In such applications, Float Cum Boost Charger (FCBC) is most commonly used power supply module. Normally, the output voltage obtained from FCBC was used to drive the ULSB MK-II devices which operates on 48V DC. In the present work, the FCBC module has been...
This paper proposes a current balance control in parallel operation using neural network control in addition to the conventional digital soft-start control for dc-dc converters. The neural network predictor is used in the average current balance control to improve the voltage drop when the current balance operation starts. In the proposed method, the neural network is trained to predict the output...
This paper presents the needs and enablers for an emerging trend in power electronics: fully integrated power conversion. Prime emphasis is placed on discussing the key enablers for this power supply miniaturization trend, comprising high switching frequency, advanced process and packaging, system co-design and circuit innovation. Industry product and research design examples are used to assist the...
The acceleration grid power supply (AGPS) is an important part of neutral beam injector (NBI) system. With the increasing of the NBI power, the requirement for output voltage of the AGPS is becoming higher and higher, even reaching to 1000 kV. As the Inverter type high voltage power supply uses the inverters located at lower voltage side to regulate and cut off the output voltage, it's very suitable...
This work presents a novel current sharing control technique based on an improved droop control scheme for a modular power supply composed of n output parallel-connected DC-DC converters. Each converter is connected to the load through individual line resistance and modeled as a dependent voltage source. In order to provide proper load sharing, a voltage reference adjustment for the main control loop...
This paper presents the design of a linear-assisted hybrid DC-DC power converter for envelope tracking RF power amplifiers. To jointly leverage the high efficiency of switch-mode DC-DC converters and the wide bandwidth capabilities of linear regulators, a hybrid power supply topology is employed. It exploits a parallel combination of a switch-mode buck DC-DC converter to provide the average power...
Recently environmental problems have attracted great attention on a worldwide scale. Therefore, the exploitation of clean-energy resources such as solar arrays, wind generators, fuel cells, and so forth has been concretely attempted. In this case, a multiple-input dc-dc converter is useful to combine the several input power sources and to supply the regulated output voltage for the load from the power...
Early in 2000, the telecoms & datacomms industry introduced a board-level power architecture based on a master DC/DC converter that powers a number of point-of-load regulators. Termed ‘intermediate bus architecture’, the scheme is easy to implement but it is not specifically designed to minimize energy consumption. With its core commitment to saving energy, Ericsson AB has developed a methodology...
For the problem of lead-acid battery charging for a long time, analyzing the causes, discusses the principle of the negative pulse charging based on fuzzy control, made the specific system circuits; shows the simulation and testing results of the system; the results show that the system for improving the lead-acid battery charging time is feasible and effective.
This paper proposes a novel control method for an interface converter that is using an indirect matrix converter (IMC) with a DC power supply. The proposed converter is constructed based on an indirect matrix converter and a converter that combined the function of a boost type converter and a step-down type converter. The proposed converter connects an active snubber to the DC link part of IMC along...
This paper presents a redundant three-phase ac to dc converter using single-phase CUK rectifier module with nearly power factor and minimized dc bus capacitance based on power balance control technique. The focus of the proposed control strategy is to reduce the dc bus capacitance value under condition step load change from 10% (75 W) to 100% (750 W). Using power balance control technique does minimized...
This paper presents a DSP based equipment aimed for power electronics and motor control applications that, in opposite with conventional training equipments, provides a great flexibility to design several applications. The equipment is a modular system with a DC power supply, three-phase MOS-bridge, a signal acquisition system, a DSP development kit and several loads, i.e. DC or AC motors and passive...
The development of Hybrid Electric Vehicles is one of the most effective solutions to improve our environment. For the purposes of improving the characteristic and efficiency of Hybrid Electric Vehicles, different hybrid drive train topologies with super capacitor based energy storages have been studied with concern about energy sources control and management. The methods of controlling mean power...
High power DC/DC converter has become the essential part of the distributed power system in fuel cell powered electric vehicles and stationary power systems. This paper proposes a topology of high power dual-phase boost DC/DC converter for fuel cell power supply. The principle of the converter operating in BOOST mode are analyzed thoroughly. A 150 KW converter was designed. The converter was adopted...
In many applications of DC-DC converters, loads cannot be specified in advance, i.e., their amplitudes are suddenly changed from the zero to the maximum rating. Generally, design conditions are changed for each load and then each controller is re-designed. Then, a so-called robust DC-DC converter which can cover such extensive load changes and also input voltage changes with one controller is needed...
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