Silent, resistant to vibrations, to impacts and to high temperatures
Inductances of low losses for frequency converters in systems of rail traction
The inductances have like main functions limit and filter the currents of entrance in primary and the currents of exit in secondary, in the frequency converters in the systems of traction shipped. The cores built with dust of ironinging sinterizado, especially developed for these applications, attain levels of losses the lowest possible. In addition to the low losses, the components used in systems of rail traction have to fulfil other high requirements: they have to be resistant to vibrations and impacts, bear high temperatures, generate the lower possible heat, save space and weight, be protected against the entrance of dust, contaminantes and water. In addition to being silent especially in case to use in wagons of transport of passengers.
SMP Sintermetalle Prometheus GmbH & Co KG (SMP) has developed a range of ideal inductances for use in rail technology and that fulfil with all these requirements. These elements inductivos use mainly in the frequency converters of the asynchronous motors, typically trifásicos, in the systems of traction shipped. They characterise for having very low losses, be resistant to high temperatures, vibrations and impacts and silent in his operation.
The inductances of SMP work with strong ramps of tension, until 10 kV/µs. Once assembled in the frequency converters, the groups subject to proofs of vibration and impact very rigorous to guarantee his resistance. The high existent temperatures in rail applications require that the elements are able to work to said temperatures, at the same time that they have to produce the lower possible heat. The inductances of SMP carry precisely a system of isolation with certification UL, class H (180 °C); that is to say, they are resistant to temperatures until 180 °C. His coating with degree of protection IP66 protects them against dust and water, allowing his setting also out of the frequency converters.
Of this form, the heat generated by the inductance produces out of the converter, what allows to reduce or delete the use of fans for the thermal sensors dissipation, with the consequent saving and elimination of costly susceptible elements of failure. Equally, the external setting, offers the additional advantage to be able to design frequency converters of dimensions more reduced. In case of the external setting, the inductances will be able to work to temperatures acclimatise always lower that inside the converter, being able to be planted for example under the chassis. SMP Offers his inductances with special supports, to make possible precisely the setting in the outside of the converters. The material magnetorresistente developed by SMP reduces to the maximum the vibrations especially in the audible field, doing them very silent and ideal for the use in wagons of transport of passengers.
The material magnetorresistente developed by SMP reduces to the maximum the vibrations especially in the audible field, doing them very silent and ideal for the use in wagons of transport of passengers
The components inductivos of SMP, apart from in rail applications, use also in frequency converters for other industrial applications like wind turbines, onduladores solar, electromedicina and other a lot of applications in electronics equipment dealers equipment dealers of power. The inductances of SMP work in frequencies until 200 kHz and intensities of until 1.000 Amperes and offer with diameters from only 36 until 300 millimetres, with weights that go from 50 grams until 130 kilograms. According to the application, are available with degrees of protection, from IP00 until IP66. All the components fulfil the normative RoHS and REACH, and the materials used possess certification UL.
The rail industry is the destinación of this type of inductances. Photo: Renfe.
