Experimental study of magnetic slurries regarding magnetic properties

• The aim of this study was to assess the basic magnetic properties of a mixture composed of a commercial lubricant and soft magnetic iron particles, where the particle content is significantly higher than in conventional magnetic fluids, due to the fact that the particles verge on the sedimentation level. This so called magnetic slurry can, then, be regarded as a highly ductile magnetic conducting material for tentative use in a magnetic circuit that can change shape under operation. The high particle content results in high saturation field densities that extend the application field towards electric power engineering. This paper, therefore, focuses on properties like relative permeability, losses, the Q-factor and the efficiency for the power frequencies 50 and 400 Hz. It shows that the relative permeabilities are low (below 10). The values of the efficiency and the Q-factor decrease considerably above 0.5 T. That limits the application of the studied slurry in electric power engineering. In such applications, the powder properties must be improved

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

0 to 1 T;400 Hz;50 Hz;Fe;Q-factor;commercial lubricant;efficiency;electric power engineering;high saturation field densities;highly ductile magnetic conducting material;hysteresis loop;losses;magnetic circuit;magnetic fluids;magnetic properties;magnetic slurries;particle content;powder property improvement;power frequencies;relative permeability;sedimentation level;shape changing circuit;soft magnetic Fe particles;Q-factor;ferromagnetic materials;iron;magnetic circuits;magnetic fluids;magnetic hysteresis;magnetic leakage;magnetic permeability;sedimentation;soft magnetic materials

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