Abstract
This paper suggests the reasonable switching frequency determination method for achieving highest efficiency of the railway propulsion system consisting the silicon carbide (SiC) inverter and permanent magnet synchronous motor (PMSM). The SiC power device allows increasing the switching frequency of the inverter because it has the small switching power loss. The total efficiency is taken into account for determining the switching frequency of SiC inverter in this paper. In the efficiency analysis of SiC inverter and PMSM, the PMSM drive control is considered with the hybrid switching method combined the synchronous PWM and asynchronous PWM. The result of the analysis shows the efficiency curve of propulsion system depending on the switching frequency. The switching frequency having the minimum power loss of propulsion system is selected based on the extracted power loss curve.
Highlights
Much research on the efficiency improvement of railway system has been performed for lastMuch research on the efficiency improvement of railway system has been performed for last decade [1,2,3]
It is propulsion system consisting the silicon carbide (SiC) inverter and permanent magnet synchronous motor (PMSM), which is shown in Figure 1, guarantees the obvious that the propulsion system consisting the SiC inverter and PMSM, which is shown in Figure high efficiency
This paper considers the 332-kW interior permanent magnet synchronous motor (IPMSM) as the
Summary
School of Electronics and Electrical Engineering, Dankook University, Yongin-si 16890, Korea Received: 17 August 2020; Accepted: 22 September 2020; Published: 24 September 2020 Abstract: suggests the reasonable switching frequency determination method for achieving
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