![]() Rotor winding loss – P cu2 – approximately 15%.Stator winding loss P cu1 – approximately 40-45%.The losses in an induction motor are distributed as follows: This seems in contradiction with the theoretical definition of the efficiency: The efficiency value obtained from the different testing standards can differ by several percent. For induction motors, the three most important ones are IEEE Standard 112, JEC 37 (Japan) and IEC 60034-2. Several standards for testing electric machinery exist on a worldwide basis. Standards for AC motors IEC 60034-2 Efficiency standards As this is a Grundfos publication, it is only natural that we should pay special attention to motors used for pumps – although much of the information contained within these pages will benefit all those with an interest in electrical motors. ![]() After all, motors are always designed to carry out specific tasks.
0 Comments
Leave a Reply. |