塑料电磁感应加热系统的设计与研究

摘要

Currently resistance wire heating is applied in most plastic extruder barrels to make the plastic particles melt, which presents poor thermal efficiency and large power consumption. To address this issue, metal body barrel is heated by applying the principle of electromagnetic eddy current through technological improvement, eddy current coil is implemented by high-frequency input control through the full-bridge as well as high-power devices IGBT. This makes eddy current heating only within the barrel metal body, which improves thermal efficiency and reduces power consumption.%　　目前的塑料挤出机大都采用电阻丝加热料筒使得塑料粒子融化，这种方法热效率差，能耗损失大。针对这个问题进行技术改进，利用电磁产生电涡流原理进行金属体料筒加热，系统通过全桥方式以及大功率器件 IGBT 对涡流线圈进行高频输入控制，只在料筒金属体内部产生涡流来加热，提高了热效率，降低了能耗。