Interchanging induction motors for fifty Hertz and sixty Hertz operation

This paper presents the conditions under which induction motors can be used interchangeably on 50 Hertz and 60 Hertz supply frequencies. Experimental results of a motor that was tested at both supply frequencies, using different criteria, is used to discuss the conditions. The criteria used for the testing include field-weakening, constant-flux, constant-slip and rated voltage. The energy efficiency performance varies according to the criteria used.