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What are the advantages of using silicon steel rotors for small gear motors?

A gear reducer and a small DC motor make up the micro gear motor. It is able to move large loads. The iron core rotor is largely constructed of silicon steel sheets in the micro gear motor's structure. What benefits come from employing silicon steel sheets for the micro gear motor's rotor? 

GB12-N20-(4)

By mixing a little quantity of silicon into the iron in the silicon steel sheet of the small gear motor, the resistivity can be effectively increased, and the magnetic aging may be greatly enhanced. The maximum amount of silicon is typically 4.5%. Cold-rolled and hot-rolled silicon steel sheets are two categories for the silicon steel sheet. In contrast to cold-rolled silicon steel sheet, hot-rolled silicon steel sheet is magnetic non-oriented, a ferrosilicon alloy, and has strong stability and a low specific gravity. A low-silicon, low-carbon alloy with high magnetic induction and little iron loss is what makes up cold-rolled sheet.

GB37-520TC-(3)

Instead of using carbon steel plate or pure iron, the iron core rotor of the micro gear motor is made of silicon steel sheet. This improves the low loss's drawbacks and lowers the volume and weight of the micro motor. definite iron loss The copper loss of the stator makes up a significant amount of the loss in low-power micro DC motors. Iron core rotors are often made of silicon steel sheets with higher magnetic permeability because they may greatly minimize copper and iron loss while also reducing excitation current.

GBP36-555SH-(2)

The iron loss makes for a significant amount of the overall loss in micro gear motors with high power because the ratio of the no-load current to the full-load current is so tiny. Iron loss is lessened in part by the core material's unit loss.


The benefits of employing silicon steel sheet for the rotor of the tiny geared motor are those listed above. Feel free to contact us if you need further details.


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