Efficient Multi-Phase Converter for E-Mobility

Abstract

The recent growth of battery-powered applications has increased the need for high-efficiency step-up dc-dc converters. The step-up conversion is commonly used in several applications, such as electric vehicle (EV); plug-in hybrid electric vehicles (PHEV); photovoltaic (PV) systems; uninterruptible power supplies (UPS); and fuel cell systems. The input current is shared among inductors by paralleling the converters; resulting in high reliability and efficiency. In this paper; a detailed analysis for reducing power loss and improving efficiency is discussed. In continuous conduction mode; the converters are tested with a constant duty cycle of 50%. The multi phase interleaved boost converter (MPIBC) is controlled by interleaved switching techniques; which have the same switching frequency but phases are shifted. The efficiency of the six phase IBC model is 93.82% and 95.74% for an input voltage of 20 V and 200 V, respectively. The presented six phase MPIBC is validated by comparing it with the existing six phase IBC. The result shows that the presented converter is better than the existing converter. The prototype of the two phase and six phase IBC is fabricated to test the performance. It is found that the output power at the load end is highest for the 5 kHz switching frequency.

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

“…Figure 4 illustrates the conversion ratio versus duty ratio in the presence of the variations in the load resistance R and parasitic parameters (R o , R ac , r). 𝑉 = 𝑉 + 𝑉 (17) with 𝜂 = ( )…”

“…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].…”

“…The authors [15][16][17] present multi-level architectures of Boost-type power converters; these converters are not suitable with the fuel cell as a power source, when one wants a converter output voltage lower than V fc_min (minimum fuel cell voltage). However, they can be used in other applications.…”

A Photovoltaic-Powered Modified Multiport Converter for an EV Charger with Bidirectional and Grid Connected Capability Assist PV2V, G2V, and V2G

“…The converter should be able to regulate the power between the generating station, grid, and charging stations. The control strategy plays a crucial role in managing the power flow between the multiple energy sources, the grid, the Battery Energy Storage System (BESS), and the charging station [19]. It takes the power generation of sources connected to the grid, demand at charging stations, and the grid.…”

Reliability improvement of multi-phase interleaved DC-DC converters for fuel cell electric vehicle applications

“…Interleaved boost converter (IBC) topologies are regarded as efficient alternatives to avoid using this redundancy. FC applications benefit from this converter topology; it is modular, highly efficient, reliable, and reduces FC current ripple [18]- [20]. IBC topologies' main benefit is that they continue to provide power to the load even if OCFs are in switches.…”