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A power conditioner with a high voltage gain for a combined heat and power generation system based on a solid oxide fuel cell is presented in this paper. The power conditioner consists of two dc-to-dc stages: an interleaved boost converter with minimized input current ripple and a series resonant converter. By analytic investigation, a pre-estimation of the converter's efficiency is shown and a method...
This paper deals with a current-fed full bridge dc-dc converter. By the results of an analytical investigation, the impact of the transformer's winding ratio, its leakage inductance and dimension of input inductor on the converter's efficiency is emphasized. Out of this, design considerations for the converter are given. Experimental results, taken from a 1.2 kW prototype, are shown.
In this paper, an overview of the, for a converter design most important, fuel cell characteristics is given. Different DC-DC converter topologies are presented. Their qualification for a low-input voltage, high-input current application is discussed. A comparison of the converters is given with regard to the power range they are appropriate for. The limiting factors for the transferable power are...
This paper investigates the single active bridge dc-dc converter with voltage doubler. An analytical investigation is given, completely describing the operating behaviour of the converter. Herewith, the impact of the transformerpsilas properties and a calculation of the current stress of the semiconductors and passive devices is shown. The results are compared to the single active bridge with full...
Fuel cells in the kW range have a high output current and low output voltage. To connect them to the mains, a DC-DC converter with a high voltage gain and an inverter are needed. In this paper an investigation of the voltage-fed full bridge dc-dc converter with high voltage gain is presented. A detailed analysis of the different operating modes, the semiconductors' current and voltage stress, the...
Fuel cells at moderate power levels have a high output current and low output voltage. In order to make them usable for applications with a higher voltage demand, a DC-DC converter with large voltage gain is needed. This paper deals with a voltage-fed full bridge converter that is designed to reach a high voltage gain. Analytical calculations are given, completely describing the operating behaviour...
This paper reports on a micro linear stepping motor which is supplied by a DC-DC converter. The micro linear motor is built up by using micro fabrication techniques like sputtering, UV depth lithography and electroplating [1, 2, 3]. In order to adjust the stator current, an adapted drive has been developed. Due to the very small inductances of the motor coils, the chosen DC-DC converter works with...
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