An Improved PWM-Induced Losses Prediction Method in IPM Synchronous Machines for Traction Applications

Ma, Cong; Wang, Wei; Wang, Hongyu; Kouhshahi, Mojtaba Bahrami; Carter, Jeff

doi:10.1109/ecce53617.2023.10362796

2023 IEEE Energy Conversion Congress and Exposition (ECCE) 2023

DOI: 10.1109/ecce53617.2023.10362796

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An Improved PWM-Induced Losses Prediction Method in IPM Synchronous Machines for Traction Applications

Cong Ma,

Wei Wang,

Hongyu Wang

et al.

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2024

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Optimal PWM Schemes in Wound Rotor Synchronous Machines and IPM Synchronous Machines for Maximum System Efficiency: A Comparative Study

Ma,

Tyckowski

2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Wound rotor synchronous machines (WRSM) without rare-earth magnets are becoming more popular for traction applications, but their potential in drive performance has not yet been fully explored. This paper presents a Pulse Width Modulation (PWM) scheme optimization procedure to minimize motor and inverter losses. It leverages different PWM schemes with different PWM switching strategies and switching frequencies. First, a generic PWM-induced motor loss calculation tool developed by BorgWarner is introduced. This tool iteratively calculates motor losses with PWM inputs across the entire operating map, significantly improving motor loss prediction accuracy. The inverter losses are then calculated analytically using motor and wide-bandgap (WBG) switching device characteristics. By quantifying these various scenarios, the optimal PWM scheme for achieving the best system efficiency across the entire operating map is obtained. The PWM-induced motor loss characteristics, the system loss tradeoffs, and the resulting optimal efficiency are discussed in detail. Finally, a comparison between IPMSMs and WRSMs in terms of system efficiency is presented. Discussions on the differences of PWM-induced losses and optimal modulation schemes between WRSMs and IPMSMs are provided to understand the tradeoffs in selecting different motor topologies.</div></div>

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Optimal PWM Schemes in Wound Rotor Synchronous Machines and IPM Synchronous Machines for Maximum System Efficiency: A Comparative Study

Ma,

Tyckowski

2024

SAE Technical Paper Series

View full text Add to dashboard Cite

show abstract

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An Improved PWM-Induced Losses Prediction Method in IPM Synchronous Machines for Traction Applications

Cited by 1 publication

References 17 publications

Optimal PWM Schemes in Wound Rotor Synchronous Machines and IPM Synchronous Machines for Maximum System Efficiency: A Comparative Study

Optimal PWM Schemes in Wound Rotor Synchronous Machines and IPM Synchronous Machines for Maximum System Efficiency: A Comparative Study

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