直驱控制涡旋压缩机位置识别方法研究
Mechanical & Electrical Engineering Magazine（2022）
Abstract
针对目前涡旋压缩机切向密封方案复杂、灵活性差、成本高等问题,在分析了涡旋压缩机动态径向间隙特点的基础上,提出了一种基于电流信号的涡旋压缩机切向主动密封的控制方法.首先,提出了一种基于平面电机的直驱式涡旋压缩机构架,以及直驱式切向主动密封控制方法;然后,在分析了涡旋压缩机动、静涡盘侧面接触力、永磁同步直线电机电磁推力和相电流关系的基础上,提出了冷态位置识别方法,以此来确定动涡盘的运动轨迹;再在冷态位置识别的基础上,提出了热态位置识别方法,以此来修正动涡盘的运动轨迹;最后,为了对基于电流信号的涡旋压缩机切向主动密封的控制方法进行有效性验证,搭建了相应的实验平台.研究结果表明:该方法能较好地确定涡旋压缩机动涡盘运动所需位置,调节涡旋压缩机动态径向间隙,样机的动态侧面接触力可小于10 N;该方法可以为结构简洁、宽调速范围、直接驱动式涡旋压缩机的设计制造提供参考.
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