A patent for a linear asynchronous motor with a lightweight secondary element has been registered in Russia. The development was formalized by specialists from the TEMP Engineering and Scientific Center, and the document was published in the FIPS database on January 29.
This is a motor used in transport systems for various purposes, from industrial lines to advanced mobile platforms. In such installations, the secondary element is placed between two inductors that form a traveling magnetic field.
Previously, massive ferromagnetic plates were used to ensure stability. This increased the weight of the structure, reduced traction characteristics, and increased energy consumption. As loads increased, engineers had to sacrifice efficiency for the sake of strength.
The authors of the patent proposed replacing the solid base with a lattice system of longitudinal beams, vertical struts, and ferromagnetic rods. The distance between the elements is calculated using a formula related to the working induction and the permissible loads of the material.
This arrangement maintains the necessary magnetic flux but allows removing excess metal. As a result, the weight of the secondary element is reduced without compromising traction and operational stability.
Additionally, the developers provided spacers between the electrically conductive plates. They compensate for thermal expansion during heating and reduce the risk of deformation during operation.
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