A simple multi‐frequency multiload independent power control using pulse density modulation scheme for cooking applications,International Transactions on Electrical Energy Systems

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A simple multi‐frequency multiload independent power control using pulse density modulation scheme for cooking applications
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2021-01-02 , DOI: 10.1002/2050-7038.12771
Pradeep Vishnuram ₁ , Gunabalan Ramachandiran ₁

Affiliation

Induction heating applications aided by power electronic control have become very attractive in the recent past. For cooking applications, power electronics circuits need to feed power to multi loads with a suitable control technique. The induction heating system requires a superlative converter topology and independent control to deliver power to multi loads. The main idea of this research work is to develop a dual‐frequency half‐bridge series resonant high‐frequency inverter feeding power for multi loads independently. A pulse density modulation (PDM) control technique is used to control the output power independently. The inverter simultaneously powers both loads with constant switching frequency. The proposed system is simulated in MATLAB/Simulink and thermal analysis is carried out in COMSOL multi‐physics software. A 1 kW prototype experimental set up is developed to feed power to dual load with the switching frequencies of 20 and 80 kHz for load 1 and load 2, respectively. The experimental results are provided to validate the system performance for various duty cycles of the PDM signal. The simulation and experimental results are in good agreement. The efficient power control is accomplished by varying the density of the switching pulses.

中文翻译：

使用脉冲密度调制方案的简单多频多负载独立功率控制，适用于烹饪应用

功率电子控制辅助的感应加热应用在最近变得非常有吸引力。对于烹饪应用，电力电子电路需要使用适当的控制技术将功率馈送到多个负载。感应加热系统需要最高级的转换器拓扑结构和独立控制，才能将功率输送到多个负载。这项研究工作的主要思想是为多负载独立开发双频半桥串联谐振高频逆变器供电。脉冲密度调制（PDM）控制技术用于独立控制输出功率。逆变器以恒定的开关频率同时为两个负载供电。所提出的系统在MATLAB / Simulink中进行了仿真，而热分析则在COMSOL多物理场软件中进行。开发了一个1 kW的原型实验装置，以为负载1和负载2分别以20和80 kHz的开关频率向双负载供电。提供了实验结果，以验证PDM信号在各种占空比下的系统性能。仿真与实验结果吻合良好。通过改变开关脉冲的密度可以实现有效的功率控制。

更新日期：2021-03-02

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