Temperature rise of ventilated railway motor armatures

摘要

THE CALCULATION of temperature rise and of time-temperature curves of a railway motor for which only preliminary design data are available, usually presents considerable difficulty. Modern railway practise demands increasingly large power units in a limited space, so that accurate methods are necessary for the predetermination of temperature rise. This must be used as a basis for guaranteed ratings and time-temperature curves in the application of a motor to a complicated service cycle.