A Non-Inverting Multi Device Interleaved Buck Boost Converter for Fuel Cell Low Voltage Applications

A Novel Control Scheme of Four Switch Buck-Boost Converter for Super Capacitor Pre-Charger

“…It means that the later the transition point, the smaller the volume of inductor and output capacitor. The inductance and capacitance can be calculated according to Eq (6) and (7).…”

“…If it is not met, high inrush current flows through Relay #2 when it turns on. Due to these characteristics, step-up operation is required [7][8]. Second, the input and output side of the SCPC becomes the same node when Relay #2 turns on.…”

State-Feedback Control of Interleaved Buck–Boost DC–DC Power Converter with Continuous Input Current for Fuel Cell Energy Sources: Theoretical Design and Experimental Validation

“…V d denotes the desired output voltage in the steady state. The (average) DC components are obtained by setting to zero all the state variable derivatives in (7)(8)(9). Doing so, we obtain the following equations from (9):…”

“…In this section, we aim at designing an appropriate controller for the nonlinear system (1-3), on the basis of the nonlinear model (7)(8)(9). The model complexity lies in its nonlinearity and the uncertainty of the load resistance.…”

“…Furthermore, the proposed topology of the Buck-Boost conver Indeed, the static (current-voltage) characteristic of PEMFC, shown in Figure 2, is nonlinear [6,7] and depends on the thermodynamically predicted fuel cell voltage output and the following three majors losses: activation losses (due to electrochemical reaction), ohmic losses (due to ionic electronic condition), and concentration losses (due to mass transport). Therefore, PEMFC systems need to use the DC-DC power converters to supply regulated and stable power to the different loads and equipment [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Classical DC-DC power converters of Boost and Buck converters are widely used in the fuel cell system [22][23][24][25].…”