基于Preisach磁芯模型的四级线性变压器驱动模块的数值模拟
Zhenbo Wan1, Weidong Ding1, Fengju Sun2
1State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
The Review of scientific instruments
|November 30, 2023
概括
这项研究模拟了线性变压器驱动器 (LTD) 中的磁芯行为,以诊断开关预火故障. 该研究解释了核心磁化如何影响断裂波形,提高脉冲动力加速器的可靠性.
科学领域:
- 脉冲动力工程 脉冲动力工程
- 加速器物理学的物理学
- 材料科学 (磁性材料) 材料科学
背景情况:
- 线性变压器驱动器 (LTD) 对未来的脉冲动力加速器至关重要.
- 开关预火故障在大型加速器中很常见,原因是许多开关.
- 通过特征波形来诊断这些断层是具有挑战性的,磁核特征起着重要作用.
研究的目的:
- 开发一个全面的数学模型,用于在Ltds的开关预火事件期间磁核心的行为.
- 为了研究磁芯磁化过程对断裂波形的影响.
- 为了验证模拟结果与四阶段LTD模块的实验数据对比.
主要方法:
- 使用经典Preisach模型建立了一个全周期磁芯模型,并与实验数据进行校准.
- 集成磁芯模型与LTD电路模型进行详细的模拟.
- 在开关预火条件下进行模拟,并将结果与四级LTD模块的实验数据进行比较.
主要成果:
- 模拟结果与四阶段LTD模块的实验数据准确匹配.
- 该研究阐明了在火灾前条件下磁核的磁化过程.
- 确定了去磁化的核心在正刺激下表现出高透性,在反向刺激时急剧下降,导致在预燃过程中产生单极输出电压.
结论:
- 开发的数学模型准确地预测了LTD中因开关预火引起的故障波形.
- 磁芯歇斯底里显著影响在火灾前事件期间输出电压的单极性质.
- 这些发现有助于改善脉冲动力加速器的故障诊断和可靠性.
相关概念视频
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The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
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01:25Transformers with Off-Nominal Turns Ratios
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01:26The Ideal Transformer
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In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
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01:19Three-Winding Transformers
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01:21Energy Losses in Transformers
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01:18Reducing Line Loss
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