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(한양대학교) (한양대학교) (한양대학교) (한화에어로스페이스) (한양대학교)
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한국자동차공학회 한국자동차공학회 춘계학술대회 2026 한국자동차공학회 춘계학술대회
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    초록·키워드

    Carrier-phase shifting between the two inverters (CPS-PWM) is an effective method for reducing switching-frequency torque ripple and acoustic noise in dual three-phase drives. However, despite its benefit in torque smoothing, this technique can intensify high-frequency current ripple. This phenomenon arises from the magnetic coupling between the two winding sets through the leakage inductance L<sub>ls</sub> which may lead to increased copper and iron losses, potentially offsetting the intended performance improvement. This paper investigates the role of L<sub>ls</sub> in determining the effectiveness of CPS-PWM. An analytical framework is established to describe the relationship between L<sub>ls</sub> and the switching-induced current ripple components. The proposed model is validated through both time-domain simulations and finite-element analysis, considering three winding configurations characterized by low, medium, and high leakage inductance. The results indicate that increasing L<sub>ls</sub> significantly suppresses PWM-related current ripple, resulting in reduced torque ripple and negligible efficiency degradation. In contrast, a small L<sub>ls</sub> tends to aggravate both torque ripple and overall losses. These findings provide practical design insights for selecting appropriate winding configurations in dual three-phase machines employing CPS-PWM.

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