Design Of A 6.8-Kw Two-Phase Converter For 48v Automotive Applications
2020 THIRTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2020)(2020)
摘要
48V motor drive systems become more prevalent with the widespread introduction of low-cost micro-mobility and micro-hybrid propulsion systems. Two-phase electric machines offer a more compact and economical structure and lower cost than three-phase electric machine alternatives, while the power density and torque density remain the same. For some applications, such as 48V mild hybrid propulsion system, two-phase electric machine is a superior solution. In this paper, three topologies of two-phase voltage source inverters are compared and the three-legged configuration is selected. To obtain the optimal motor drive system cost, a 48-V silicon MOSFET-based, two-phase power converter with maximum power of 6.8kW is designed and developed. The DC-link capacitance and voltage ripple is analyzed in order to minimize the capacitor bank. The design process is explained in details and the experimental tests are included.
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关键词
Two-phase converter, 48V motor drive system, SVPWM, DC-link voltage ripple
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