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Pérez Barreto on Muck Rack

Pérez Barreto

As seen in: Dialnet - Universidad de La Rioja
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Articles

Investigacion experimental del trabajo de los motores asincrónicos con frecuencia de 50 Hz en redes de 60 Hz

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By Rafael Barreto, Svietlana Petrovna Maliuk, Pérez Barreto
| Dialnet - Universidad de La Rioja
español En el trabajo se exponen los resultados de los ensayos de un motor asincrónico con el rotor en cortocircuito del tipo A0-51/4 de fabricación soviética en régimen de marcha al vacío, y de cortocircuito en redes de 50 y 60 Hz. Se muestra cómo influye la variación de la frecuencia en las principales características técnico-energéticas del motor.
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Principios metodológicos para la elección del complejo carga-transporte óptimo

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By Rafael Barreto, Pérez Barreto, A. A. Kulyeshov
| Dialnet - Universidad de La Rioja
English This work describes the fundamental methodological principles for the selection of the optimun type of excavator-truck complex, both in the projection stage and in the mining process. The working parameters of both the excavator and trucks are obtained by the value of the ponderal module of the complex. The optimun type is, definitively, chosen by the criterium mínimum reduced cost in the loading, transportation and unloading of the mineral.
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Sobre la elección de criterios de semejanza hidrodinámica aplicados al transporte hidráulico

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By Rafael Barreto, Svietlana Petrovna Maliuk, Pérez Barreto
| Dialnet - Universidad de La Rioja
English This work points out the field of application of known hidrodynamic likeness criteria to model the transportation of highly-saturated high density hydromixtures. Based on experimental data, it is proved that the application of the Froude number for solid particles, as a likeness criterium may lead to erroneous results.
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