Drives and Motors for The Railway Sector and Other Applications

The drives and motors for the railway sector presented by ESA Automation are the result of 30 years of experience.

Most of all, they have been created from the integration of two assets of knowledge: ESA Automation, with its innovative solution for industrial automation, and Selema, the brand of drives for electric motors.

The acquisition of Selema by ESA Automation was the first big news of the year, and it is already clear how this integration can benefit the industry and, in this case, the production of motors for the railway sector.

Drives and motors needs in the railway sector

The railway sector – as well as other similar ones – has been manifesting increasingly specific and important needs.

It is clear, in fact, that this sector in undergoing a constant development, especially during the past years.

From high speed trains to the creation of new routes to improve the quality of the service, it has become necessary to have an adequate industrial and technological support.

In other words, there is a need for drives and motors solutions for the railway sector that can promote its evolution and development.

At the same time, there are also some more specific needs.

For example, the motors for the railway sector must be able to endure prolonged use, mechanical solicitations and strong vibrations, without letting it compromise their performance.

ESA Automation and the Selema motors for the railway sector

Selema drivers and motors solutions in the ESA Automation line include different products that have been especially designed for the railway sector and other similar applications.


For example, you can find some types of DC motors (Direct Current) that enable long term high level of endurance and reliability, even in particularly harsh environments. The ideal solution to answer the needs that we have already mentioned.

This kind of solutions are perfectly suitable to be used in the switch machines to generate the movement of mechanical structures aimed to the change of tracks along the railway network or in the classification yards.

Furthermore, they can be used as movement generators for the mechanical devices to raise and lower the bars in the automatic level crossings.

In other words, the Selema drivers and motors solutions by ESA Automation satisfy all the different specific needs of the railway infrastructure. And not surprisingly.

In fact, it is the result of the implementation of a know-how developed in over 30 years of activity in this sector and integrated with the ESA Automation experience.

The main features of Selema motors for the railway sector by ESA Automation

With its Selema drives and the motors, ESA Automation offers dynamic and innovative solutions that meet the most important requirements of the railway sector in the most complete and safe way possible.

In fact, we also offer a DC motor with double collector, which allows the inversion of the motion with a small number of connections and a simple and reliable control electromechanic.

The ESA Automation motors for the railway sector also distinguish themselves for their high productivity – and thus for the compact size – and a high value of the demagnetization current. A key feature, especially when the generator is located close to the motor.

Moreover, the presence of a laminated pole expansion allows to concentrate the flux of the permanent magnet and thereby increase the induction value to the air gap. As a result, ESA Automation and Selema have managed to minimize the size of the active parts and to increase the value of the demagnetization current up to twenty times the rated current.

We have already mentioned the need for motors for the railway sector to withstand shocks and vibrations. For this reason, a felt pad has been added behind the rotor collector, to which the connection wires have been secured with a specific resin.

Finally, one of the most useful characteristics is the presence of a drawn aluminum wedge that, in addition to functioning as a structural element, guarantees the correct positioning and locking of the stator components, and increases the switching limit of the machine and therefore the life span of the brushes, ensuring a better heat exchange between the rotor and the environment.

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