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无电解电容永磁同步电机驱动的过调制策略:电压畸变分析与边界优化

Overmodulation Strategy for Electrolytic Capacitorless PMSM Drives: Voltage Distortion Analysis and Boundary Optimization

语言:

中文摘要

采用薄膜电容的永磁同步电机(PMSM)驱动系统具有长寿命、小体积和低成本优势。然而,在直流母线电压波动下,传统的过调制策略会导致定子电压和电流畸变。本文分析了直流母线电压波动对过调制的影响,并提出了相应的边界优化策略以提升电压利用率并抑制畸变。

English Abstract

Permanent magnet synchronous motor (PMSM) drives equipped with slim film capacitors have many advantages, including longer lifetime, smaller volume, and lower cost. However, improving the dc-link voltage utilization rate by the typical overmodulation strategy will cause the distortion of the stator voltage and current due to the dc-link voltage fluctuation. In this article, the influence of the du...
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SunView 深度解读

该技术主要针对电机驱动控制,与阳光电源的电动汽车充电桩及风电变流器业务存在技术关联。在充电桩功率模块设计中,采用薄膜电容替代电解电容是提升系统可靠性和寿命的关键趋势。本文提出的过调制边界优化算法,可为阳光电源优化变流器在宽电压范围下的输出性能提供参考,特别是在提升功率密度和降低母线电容容量需求方面具有应用潜力,有助于进一步降低产品体积与成本。