Abstract:
In order to research the influence of leakage flux in high hydrostatic pressure vessel, we have measured the magnetization curve under five different ambient conditions, then compared the B-H curve measured on table far from iron with B-H curve measured in situ in pressure vessel. Finally we calculated the relative errors, c0/c0, produced by leakage flux of electric solenoid with 13 layers in pressure vessel. The results show that (1) for empty secondary coil, c0/c0=-1.90%～-1.27% (400 Hz), -0.36%～-0.64% (1 000 Hz); (2) for Fe nanometer-scale powder, magnetization curve and initial B-H curve are all straight lines, i.e. both of them possess constant magnetic permeability, . Relative errors produced by leakage flux in high pressure vessel, /=3.9%～3.8%, about one time higher than that of (1).
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