Magnetic Poles Position Detection of Permanent Magnet Linear Synchronous Motor Using Four Linear Hall Effect Sensors

Magnetic pole position detection is the core of closed-loop control system permanent magnet linear synchronous motor (PMLSM), and its estimation accuracy directly affects performance dynamic response speed. In order to solve problem increased error magnetic caused by field distortion at end PMLSM while also considering cost hardware, paper uses four Hall sensors as components adopts an optimized algorithm improve motor. Firstly, a numerical simulation poles was conducted using Ansoft Maxwell software, combined with theoretical analysis, optimal installation range orthogonal placements relative obtained. Meanwhile, based on existing vector tracking observer, improved observer model proposed. The Matlab/Simulink software used compare Hall-based model, verifying feasibility algorithm. Finally, rationality spatial layout design improving were verified through experiments.