Abrupt Step-Size Transition in High-Power Traction Systems

Le résumé fourni par la source

In high-power traction systems, synchronous modulation is typically employed due to limitations on switching frequency. As the rotational speed increases, the system undergoes switching of frequency division ratios, leading to abrupt changes in the sampling frequency. This study establishes the Internal Model Control (IMC) architecture as an investigative framework, through theoretical analysis, we reveal how step mutations in modulation parameters induce system transients and cause dq-axis current fluctuations. To address these challenges, we propose a novel dual-reconstruction methodology encompassing signal reconstruction and integral quantity reconstruction. The proposed approach is rigorously validated through mathematical derivation, demonstrating its capability to suppress transient oscillations and stabilize current components. Simulation results confirm the effectiveness of the reconstruction strategy in improving system robustness under dynamic modulation conditions.

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