In Russia, a patent has been registered for a linear induction motor with a lightweight secondary element. The development was formalized by specialists from the engineering and research center "TEMP," and the document was published in the FIPS database on January 29.
It concerns 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 generate a traveling magnetic field.
Previously, massive ferromagnetic plates were used to ensure stability. This increased the weight of the structure, reduced traction performance, and raised energy consumption. As loads increased, engineers had to sacrifice efficiency for strength.
The patent authors proposed replacing the solid base with a lattice system of longitudinal beams, vertical supports, and ferromagnetic rods. The distance between the elements is calculated using a formula related to operating induction and permissible material loads.
This layout preserves the required magnetic flux but makes it possible to remove excess metal. As a result, the mass of the secondary element is reduced without degrading traction or operational stability.
In addition, the developers provided spacers between the electrically conductive plates. They compensate for thermal expansion during heating and reduce the risk of deformation during operation.