METHOD AND DEVICE FOR MEASURING ROTOR SLIDING FREQUENCY FOR ASYNCHRONOUS MOTORS WITH SHORTCIRCUITED ROTOR

摘要

the solution technique which is the subject of invention refers to a method and a device for assessing the frequency of slip rotorice engine rotor asynchronous in short,powered from a variable frequency voltage static converters with printable,use sizes within masurabile electrical analogue converter is not required turatiei and measuring frequency, and constitutes a main invention training, with no description.91569.the solution lies in masurareaanalogica current intermediate circuit of the converter, and inverter output current effective values, processing thereoftogether with a specific inverter constant, in a block of analog calculation, the output thereof fiindconectata in paralleltwo transformers functional whose exits are combined into a sumator.