《机电工程》杂志社科技期刊核心期刊论文投稿机电一体化机械、仪表电工自动化、计算机浙江大学主办

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Position identification method of direct drive-controlled scroll compressor

Published:2022-10-20 author:YAN Xi-long, CAI Jiong-jiong, JIANG Jia-zhen, et al. Browse: 611 Check PDF documents

Position identification method of direct drive-controlled scroll compressor

YAN Xi-long1, CAI Jiong-jiong1, JIANG Jia-zhen1, QU Xiao1, LIU Lei2

(1. School of Automation and Electrical Engineering, Zhejiang University of Science and Technology, Hangzhou

310023, China; 2.Hangzhou Scroll Technologies Co., Ltd., Hangzhou 310023, China)

Abstract: Aiming at the problems of complexity, poor flexibility and high cost of the current tangential sealing scheme of scroll compressor, based on the analysis of the characteristics of dynamic radial clearance, and a control method of tangential active seal of scroll compressor was studied based on the current signal. Firstly, a directdrive scroll compressor frame based on a planar motor and a direct-drive tangential active seal control method are proposed.Then,based on the analysis of the relationships between the side seal contact force of scroll compressor, the electromagnetic thrust of permanent magnet synchronous linear motor and the phase current of motor, a cold position recognition method was proposed to determine the motion trajectory of the orbiting scroll, and then a hot position recognition method was proposed to correct the motion trajectory of the orbiting scroll on the basis of the cold state. Finally,in order to verify the effectiveness of the control method of the scroll compressor tangential active seal based on the current signal, a corresponding experimental platform was built. The results show that this method can better determine the required position of the scroll compressor moving scroll, adjust the dynamic radial clearance of the scroll compressor, the dynamic side contact force of the prototype can be less than 10N.This method can provide a reference for the design and manufacture of direct-drive scroll compressors with simple structure, wide speed regulation range, and direct drive.

Key words: positive displacement compressor; radial clearance; tangential active seal; current signal; position identification; seal control method; scroll trajectory

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