The presented article concerns issues related to the diagnostics of technical condition insulation electrical machines. It discusses importance operational supervision, maintenance and machine systems. structure system is known solutions for making winding are described. negative impact conditions various exposures on Special attention focused review available diagnostic methods insulating syst...

The article presents a new method of counteracting shaft voltages and currents in AC electrical machines. It is based on the use an auxiliary winding located stator machine. design test stand adapted to measurement machine, prototype synchronous machine with permanent magnets, has been presented. model was used conduct number laboratory tests aimed at confirming functionality various operating ...

Most simulation models of electric machines use the coupled circuit approach, where the machine is considered as an electric circuit element with time-varying inductances (abc model) or with constant inductances (dq0 model). On the other hand, the rotating magnetic field approach, which considers the electric machine as two groups of windings producing rotating magnetic fields and can give insi...

In electric machines the electromagnetic fields interact with the deformations of machine structures. At low frequencies the electromagnetic system may couple distinctly with the mechanical one. This electromechanical interaction changes the vibration characteristics of the machine; e.g., it may induce additional damping or cause rotordynamic instability. To study these interaction effects, an ...