2013•Advanced materials researchOpen access

Study on Magnetic Model and Magnetic Force of Magnetic Fluid in Pressure Difference Sensor

Rui Can Hao, De Cai Li, Yang Wen, Hua Gang Liu

Abstract

Magnetic fluid is the key core of magnetic fluid sensor. Here magnetic model of magnetic fluid is analyzed. The magnetic curve of magnetic fluid is divided into 3 parts and the liner area is presented to make magnetic fluid sensor more sensitively. The magnetic force of magnetic fluid in magnetic field is calculated and analyzed. The magnetic permeability of magnetic fluid in sensor could be treated as a constant in the linear area of magnetization curve. And the magnetic force of magnetic fluid in magnetic field could be ignored if the length to diameter ratio of the solenoid is large enough.

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Key concepts: Magnetic field, Magnetic pressure, Magnetic energy, Magnetization, Magnetic reactance, Permeability (electromagnetism), Electromagnet, Materials science