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In recent years a strong emphasis of community to environmental protection is visible. This resulted in intensification of research focusing on finding new technologies to remove pollutants from the environment. One of the very promising technology in many technological processes where removing gaseous, harmful substances from the atmosphere is necessary is the non-thermal plasma (NTP) technology...
This paper proposes an extended methodology to generate high step-up DC/DC converters. The methodology is based on integration of the common circuits of the standard non-isolated DC/DC converters and association of the converters output sections. For the integration of two non-isolated converters, the output sections are series connected, meanwhile parallel and cascaded connection are only possible...
The use of Direct Current to Direct Current (DC-DC) converters in Electric Vehicles (EV) drive trains allows for optimal combination of a power source complementing an energy source. Various topologies have been analysed and compared for their best features. A set of parameters has been created, based on which a new topology has been developed. The new topology is modular and allows for redundancy...
This paper presents an isolated three-phase bidirectional AC-DC converter with a novel modulation strategy that enables Zero-Voltage-Switching (ZVS) for all switches over the whole AC line period. The AC-DC converter allows the direct coupling of a three-phase AC system with a DC port applying a single high-frequency transformer. A novel modelling approach for the power flows and the derivation of...
The paper presents a proposal for capacitance and inductance selection procedure of the modular multilevel converter. Two analysis criteria are taken into consideration, the circulating current and voltage ripple across submodule capacitors. Results are obtained numerically by using the converter averaged model based on state equations. In the modular multilevel converter operating under a direct...
The usage of magnetoresistive current sensors is increasing steadily in the field of power electronics. Sensors must not only be accurate and dynamic, but must also be compact and robust. An integrated SMT magneto-resistive current sensor as well as a 2 MHz bandwidth THT current sensor is introduced. Various future applications from the wide field of power electronics are shown that open up new possibilities...
Recently, the bi-directional dc-dc converter has been focused on because of the huge demand for diversification of power supply network including battery. The dual active bridge (DAB) dc-dc converter is one of the most popular circuits for bi-directional applications because of its simple structure. However, power efficiency at light load is the intrinsic problem of a bi-directional DAB DC-DC converter...
Modular multilevel converters with embedded battery cells are suitable candidates to improve the energy conversion efficiency of battery electric vehicles. In this new topology, the series connection of the battery cells is obtained by means of H-bridge modules, allowing the highest flexibility for the discharge and recharge of each individual battery cell. This objective can be achieved in practice...
By replacing the power inductor in a traditional converter topology with a transmission line, new functions such as inverting and non-inverting output voltage polarity from the same converter will arise. In this paper, the proposed technology was investigated in an AC/DC converter where the traditional topology (diode bridge and secondary DC/DC converter) was replaced with a single converter with...
Wind turbines and the belonging converters increase in size and price. A reduction in the number of main components is desirable while it reduces need of space, investments and increases the efficiency. A wind turbine contains both a converter reactor and a step up transformer. The paper presents theory and laboratory measurements for a new control strategy which make it possibly to connect a wind...
This paper introduces a novel power management architecture for battery powered portable applications, where ac-dc power adapters are used to charge the battery. The flyback-based system allows independent regulation of output bus voltage, irrespective of adapter output, and battery cell voltages. This architecture creates the flexibility to use a wide range of adapters to power the device while charging...
This paper describes a novel way to implement soft switching in DC/DC converters for high current low voltage applications in the automotive field. Adding resonant elements to a bidirectional buck boost converter enables resonant behaviour. In simulation and laboratory it will be shown that this behaviour reduces the switch-off losses strongly.
For research at high magnetic fields (>30 T) a series connection of a superconducting and resistive magnet is used, requiring high DC power (8 MW) with an extremely low current ripple (< 15 ppm) and a very high short time current stability (2 ppm of In). One single initially 4.4 MW, finally 8 MW, water-cooled thyristor converter with passive filtering is constructed and put in operation, fulfilling...
The Soft Switching Three Level Inverter — abbreviated to S3L Inverter — was first introduced in 2011. It is a novel circuit topology for PWM inverters, whose areas of application include electrical drives and grid-tie inverters for photovoltaic installations and wind power plants, and for power supplies. It is of very simple design and therefore inexpensive. It is implemented completely as soft switching...
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