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首页> 外文期刊>Power Electronics, IET >Frequency-dependent modelling of domestic induction heating systems using numerical methods for accurate time-domain simulation
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Frequency-dependent modelling of domestic induction heating systems using numerical methods for accurate time-domain simulation

机译：使用数值方法对家用感应加热系统进行频率相关的建模，以进行精确的时域模拟

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摘要

Domestic induction heating systems are usually modelled as an electrical equivalent composed of the series or parallel connection of an equivalent resistor and inductor. This model allows obtaining useful time-domain results in order to extract design conclusions for the power electronic converter. However, this model neglects the dependence of the equivalent electrical parameters with frequency. This dependence becomes a key parameter when the induction system varies the excitation frequency with the purpose of adapting the output power. In order to overcome this limitation, this study proposes a modelling strategy to take into account the influence of frequency divided into two steps. First, the frequency-dependent impedance is obtained by means of a finite-element analysis tool. Afterwards, a passive network composed of several inductors and resistors in series and parallel connection are used to fit the frequency response of the induction load. The proposed strategy allows obtaining a more accurate model of the induction heating load. Moreover, as there is no need to build previous prototypes, the design process is optimised. The feasibility of this proposal has been tested by comparing timedomain simulations with oscilloscope measurements in a real domestic induction heating system.
机译：家用感应加热系统通常被建模为由等效电阻和电感的串联或并联组成的等效电气。该模型允许获得有用的时域结果，以便提取功率电子转换器的设计结论。但是，该模型忽略了等效电参数与频率的关系。当感应系统为了适应输出功率而改变激励频率时，这种依赖性成为关键参数。为了克服这一限制，本研究提出了一种建模策略，以考虑分为两个步骤的频率影响。首先，借助于有限元分析工具获得频率相关的阻抗。然后，使用由几个串联和并联连接的电感器和电阻器组成的无源网络来适应感应负载的频率响应。所提出的策略允许获得感应加热负载的更准确的模型。此外，由于不需要构建先前的原型，因此可以优化设计过程。通过在真实的家用感应加热系统中将时域仿真与示波器测量值进行比较，测试了该建议的可行性。

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