自由区电磁炉锅具位置辨识及功率调节  

Pot Position Identification and Power Regulation for Free Zone Induction Cooker

作　　者：王博[1] 谭平安[1] 谭广 唐锐[1] Wang Bo;Tan Ping'an;Tan Guang;Tang Rui(School of Automation and Electronic Information Xiangtan University,Xiangtan 411100 China)

机构地区：[1]湘潭大学自动化与电子信息学院,湘潭411100

出　　处：《电工技术学报》2025年第8期2393-2404,共12页Transactions of China Electrotechnical Society

摘　　要：锅具位置辨识是实现自由区电磁炉自适应加热和功率调节的关键因素。传统的锅具位置辨识方法易受外界因素波动的影响,或需要大量的样本数据,在锅具位置辨识的准确性及速度上存在明显不足,且未考虑锅具偏移对电磁炉功率输出的影响。为此,该文通过建立锅具和感应加热线圈之间的等效电路模型,分析锅具位置偏移影响系统阻抗和电流相位的机理,在此基础上提出利用电流相位实现锅具位置的辨识方法,以控制开关阵列实现锅具位置的定位加热。同时,引入可调电容电路实现偏移工况下电磁炉最大功率输出,借此提高锅具的加热速度和温升。最后搭建自由区电磁炉实验样机,验证了锅具位置辨识方法和功率调节策略的有效性,位置辨识精度大于96%,位置辨识响应速度为0.8 ms,锅具位置辨识策略速度快、精度高,偏移工况下经功率调节策略锅具温升显著提升。提升了电磁炉炉面的利用率和用户体验,有利于自由区电磁炉的推广及应用。In order to realize the freedom of placing pots,the free zone induction cooker with multiple heating coils is gradually developing.It can perform user-customized heating of different pots,greatly improving the flexibility of using the induction cooker.In actual work,the induction heating coil in the corresponding area needs to be triggered based on the real-time position.Therefore,the correct identification of the pot position affects the working status and heating performance of the free zone induction cooker system.As a result,pot position identification has become a key factor that needs to be solved urgently.Traditional pot position identification methods are easily affected by fluctuations in external factors,require a large amount of sample data,and need to improve the accuracy and speed of pot position identification.This paper indicates that the misalignment of the pot affects the mutual inductance M between the pot and the induction heating coil,thereby affecting the impedance and current phase of the system.An identification method is proposed using the current phase to control the switch array,which achieves positioning and heating of the pot.The proposed pot position identification strategy requires a small amount of sample data,and the branch current phase is only related to the position of the pot.It is not easily affected by system voltage and current fluctuations,so the position of the pot can be judged in real-time.Secondly,regarding the impact of pot misalignment on current and power,this paper introduces a power regulation strategy based on an adjustable capacitor circuit.Under the misaligned working condition of the pot,the disturbance observation method of maximum current search is used to adaptively adjust the adjustable capacitor.The maximum power output of the induction cooker is obtained,and the heating speed of the pot is improved.The pot position identification strategy and the power regulation strategy coordinate to ensure accurate identification of the pot position and rapid heating,w

关 键 词：自由区 电磁炉 锅具位置辨识 功率调节 

分 类 号：TM924.01[电气工程—电力电子与电力传动]