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基于周期传播频谱调制的SiC逆变器的二次频率调制策略
Yanfei Cao1, Junjie Su1, Yan Yan1
1College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China.
Sensors (Basel, Switzerland)
|February 26, 2025
概括
这项研究为SiC电机控制器引入了一种新的"二次频率调制"策略,显著减少电动汽车的电磁干扰 (EMI),而不会增加波纹或损失.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 电磁兼容性 电磁兼容性 电磁兼容
背景情况:
- 碳化 (SiC) 电机控制器对于电动汽车至关重要,但电磁干扰 (EMI),设备损失和电压/电流波动都是重大挑战.
- 现有的扩散频谱调制策略提供了一些缓解,但需要进一步优化,以全面提高性能.
研究的目的:
- 为SiC电机控制器设计一种先进的调制策略,尽量减少EMI,设备损失和电压/电流波动.
- 开发和评估一种新的"二次频率调制"技术,以在有限的扩散频谱范围内增强EMI降低.
主要方法:
- 在周期性扩散频谱调制下构建逆变器输入电压,输出电流和切换损失等效评估模型.
- 建立扩散频谱调制参数和关键绩效指标 (EMI,损失,波动) 之间的定量关系.
- 在各种扩散频谱调制策略下评估逆变器性能和损失,从而提出了"二次频率调制"策略的建议.
主要成果:
- 拟议的"二次频率调制"策略有效地降低了逆变器导电EMI的峰值值.
- 在不增加逆变器的电压/电流波或设备损失的情况下,可以实现这种EMI的减少.
- 实验验证证证实了优越的EMI缓解能力与单周期信号扩散频谱调制相比.
结论:
- "二次频率调制"战略在减少电动汽车中SiC电机控制器的导向EMI方面取得了重大进展.
- 这种技术为实现低EMI,低损失和低波纹同时提供了实用解决方案,提高了整体系统性能.
- 这些发现为更高效和电磁兼容的电动汽车动力系统铺平了道路.
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