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The axle strain monitoring is an effective technique to prevent massive damage to the train. The measurement of the axle strain needs rotating sensors, data acquisition and data transmission units that have to be electrically powered. This paper presents a high frequency induction power feeding system that can be directly mounted on the train axle in a very stable and safety way. The system equations...
The application of an energy transmission system to a rotating shaft by using a counter-weighted-free-wheeled-rotor permanent magnet synchronous machine is analyzed in this paper. This solution avoids slip rings and can generate a power amount which can be significantly higher if compared to other contact-less solutions. The guidelines for the design of such a machine are discussed by considering...
The design of real electrical, electronic or electromagnetic complex systems fulfilling EMC constrains often exploits the performances of population based global optimizers. One of the main drawbacks of the adoption of these optimizers in the design of a real system is the difficulty in the introduction, in the optimized design algorithm, of all the heuristic knowledge already available in the field...
The voltage distribution inside a machine's winding is analyzed in this paper. The use of a simple distributed parameters coil model allows to predict, in a qualitative way, the value of the peak voltage as a function of the winding length. Thanks to a simple algorithm, the voltage peak distribution is analyzed as a function of the coil constructive parameters like the capacitance-to-ground and the...
An induction motor model construction and the validation of the model response to a filtering technique is analyzed in this paper. The filter is connected to the rotating machine terminals in order to suppress overvoltages due to the long cables and high frequency pulses of the inverter. With the help of high frequency measurements made by the authors on a 1.1kW induction motor, an accurate simulation...
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