Abstract
To improve the endurance and charging flexibility of electric vehicle battery packs, this paper proposes a multi-battery block module (MBM) topology for four-phase switched reluctance motors (SRMs), which not only allows flexible electric vehicle operation, but also achieves fast demagnetization and excitation. By integrating the multi-battery block module and photovoltaic (PV) panel into an asymmetrical half-bridge (AHB) converter, the MBM topology is designed to supply a multilevel bus voltage for the SRM drive. To improve the endurance of battery packs, a PV panel is also added to the topology to charge battery packs when the system is stationary. According to the different operation requirements, multiple power supply modes and charging modes can be realized by controlling the power devices in the proposed MBM topology. The simulation results based on the MATLAB/Simulink platform and the experimental results on a four-phase 8 / 6 switched reluctance motor verify the effectiveness of the proposed design.
Highlights
Human survival is closely related to social progress and energy development
Developing new energy instead of fossil energy consumption to alleviate the energy crisis and reduce greenhouse gas emissions has become the main goal of global energy development in the future [5,6,7]
Traditional power converters cannot meet the complex power supply needs of new energy electric vehicles
Summary
Human survival is closely related to social progress and energy development. With the continuous progress of science and technology, people have to face new crises and challenges [1,2], especially the contradiction that the energy demand is increasing, but the existing fossil energy is increasingly short [3,4]. Traditional power converters cannot meet the complex power supply needs of new energy electric vehicles. It is important to design a power converter which can flexibly combine multiple battery packs to meet the complex running conditions of electric vehicles. Reference [28] proposed an SRM modular power converter based on dual-switch modules and dual-wire windings. It requires two-wire windings and is not suitable for the traditional SRM. The modular power converter for a four-phase SRM proposed in [30] has the advantage of overlapping current pulses, which can increase the speed of the SRM and minimize the number of power switch modules. Three battery static charging methods can be realized, and the charging current can be flexibly adjusted which contributes to an improved battery life
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