大功率电灶具混合调功策略研究  

Research on the Mixed Power Adjustment Strategy of High-Power Electric Cooker

作　　者：吴安凯 莫岳平 WU Ankai;MO Yueping(College of Electrical,Energy and Power Engineering,Yangzhou University,Yangzhou Jiangsu 225127,China;Intelligent Equipment and Transportation Technology of Jianghai College,Yangzhou Jiangsu 225101,China)

机构地区：[1]扬州大学电气与能源动力工程学院,江苏扬州225127 [2]江海职业技术学院智能装备与交通技术学院,江苏扬州225101

出　　处：《电子器件》2024年第6期1570-1576,共7页Chinese Journal of Electron Devices

摘　　要：随着高频感应加热电源在热加工工业中的广泛应用,为使电源输出效率提高,针对大功率感应加热电灶具电源单一脉冲频率调功(PFM)在低负载高频段损耗大且调功能力弱这一问题,提出了一种适用于全桥串联谐振逆变电路的脉冲频率调功和移相脉冲宽度调功(PFM-PSPWM)相结合的混合控制策略,来实现电源功率的连续高效调节。该策略在高功率且靠近谐振频率时采用PFM调功模式;在低功率段远离谐振频率时,采用恒定频率并切换到移相脉冲宽度调功(PSPWM)模式。在MATLAB/Simulink环境下,对提出的PFM-PSPWM混合调功策略进行了电流闭环控制仿真验证,结果表明:该策略提高了电源的加热效率,降低了系统在高频时的损耗。With the wide application of high frequency induction heating power in thermal processing industry, the output efficiency of induction heating power is improved. For the power adjustment performance of single pulse frequency modulation(PFM)of high-power induction heating electric cooker power in the low load and high frequency stage, the loss is large and the power adjustment ability is weak. To solve this problem, a mixed power adjustment strategy suitable for full bridge series resonance inverter circuit is proposed to realize the continuous and efficient regulation of power. This strategy adopts PFM modulation mode when the frequence is of high power and it adopts near the resonance frequency, and constant frequency and switches to phase-shift pulse width modulation(PSPWM)mode when the frequency is of low power and far from the resonance frequency. The current closed-loop control is performed for the proposed PFM-PSPWM mixed power modulation strategy in the MATLAB/simulink environment. The results show that the proposed strategy improves the heating efficiency of the power supply and reduces the loss of the system at high frequency.

关 键 词：电灶具 混合调功 加热效率 闭环控制 

分 类 号：TN761[电子电信—电路与系统]