New generation electromagnetic induction fluid heating appliance using series resonant PWM inverter with auto-tuning PID control-based feedback scheme

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This paper describes a newly-developed of an electromagnetic induction fluid heating appliance using a heatedflow-through metallic package incorporated into the nonmetallic vessel in the pipeline, which is composed of series-loaded resonant phase-shift PWM high-frequency inverter using IGBT modules and their optirum driver modules in addition to an auto-tuning PID controller for temperature regulation. This efficient inverter-fed type fluid heating appliance is more acceptable for high-quality heat energy transfer and delivery processing plants operated under a precise temperature control scheme as well as heat-energy storage and heat exchange processing plants because of clean, safty and high-efficient energy conversion, compactness in volumetric size, and ease to control. In particular, the series capacitor-compensated resonant PWM inverter with a power factor correction and active sinewave line current-shaping functions is introduced for induction-heated pipeline fluid healing. The original structure of electromagnetic induction-heated metallic package in the nonmetallic vessel or tank for high-efficient fluid heating is demonstrated from a practical point of view, in which specially-designed fluid-through induction-heating metallic package assembly with a huge heating surface to induce the eddy current is incorporated into the nonmetallic cylindrical vessel with a working coil connected to a high-frequency AC power supply. The inherent remarkable features of this power electronic appliance are schematically pointed out and confirmed. Its operating characteristics in the steady-state are illustrated and evaluated. The prospective applications of this new conceptional fluid heating appliance are mentioned herein.
山口大学の論文

New generation electromagnetic induction fluid heating appliance using series resonant PWM inverter with auto-tuning PID control-based feedback scheme

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