Design of Hall Effect Gear Tooth Speed Sensors by Using Magnetic Field Simulation

摘要

In this paper design of Hall Effect Gear Tooth Speed Sensors by using Magnetic Field Simulationrn(MFS) is proposed for shortening development time and saving high experimental costs. The MFS isrnimplemented with the software Ansoft Maxwell. The deviation between the simulation and measuredrnresults of magnetic flux density passed through Hall IC during rotating the target gear is corrected by arnproposed calibration algorithm of adapting input parameters of the MFS. The presented methods arernapplied to the design and optimization of speed sensor CYGTS101DC-S and its target gear. After thernoptimization the duty cycle of the sensor output impulse is about 50% with relative error within ±2%,rnand the sensing gap reaches 3.5mm.