基于电抗补偿的高精度锅具检测

High-Precision Pot Detection Based on Reactive Compensation

全表面电磁灶线圈数量多排列密,对锅具检测精度要求高,传统的检测方法精度低,响应慢而不能满足应用。本文分析了锅具影响线圈阻抗变化的原理,通过电抗补偿的方法提高阻抗模的变化率,设计了相应的电路拓扑,并进行了理论分析和实验验证。实验结果表明,不同覆盖面积时产生的检测电压与理论分析相吻合。通过微处理器对每个线圈的检测电压进行查询,可以准确判断锅具的存在和线圈的覆盖程度。该技术检测速度快、成本低,非常适用全表面电磁灶应用。

The coils in a full-surface induction cooker are numerous and densely arranged,requiring high precision in pot detection.Traditional detection methods have low accuracy and slow response,which cannot meet the application requirements.This paper analyzes the principle of how pots affect coil impedance variations and proposes a method of enhancing the rate of impedance modulus change through reactive compensation.A corresponding circuit topology is designed,and theoretical analysis and experimental verification are conducted.The experimental results show that the detected voltage generated at different coverage areas aligns with theoretical analysis.By querying the detection voltage of each coil through a microprocessor,it is possible to accurately determine the presence of a pot and the extent of coil coverage.This technology offers fast detection speed and low cost,making it highly suitable for full-surface induction cooktop.