Refined Researh and Optimization of Energy Modes of a Frequency-Regulated Induction Motor with a Fan Load

Refined researches of the energy modes of a frequency-regulated induction motor loaded with a centrifugal fan have been carried out in steady-state modes for various speeds and different known frequency control ways. These researches took into account all power losses, presents in the motor, including those caused by the transportation of iron and additional power losses to the magnetization circuit or through the air gap of the motor, respectively. The values of the rotor flux linkage module and the relationship between the module of the generalized stator voltage vector and the angular frequency of the magnetic field of the motor, at which the main electromagnetic power losses in it are minimized, are determined.