This paper discusses the wound rotor induction motor and variable-frequency drive (VFD) that regulates the stator voltage frequency. The stator and rotor windings are connected to a common electrical circuit. The slip energy of the motor goes to the DC link and feeds the stator winding of the motor. The block diagram of the electric drive, the equivalent circuit and the basic characteristic of the cascade VFD are considered. It is shown that the energy-saving mode with a minimum ratio “stator current/torque” is achieved at an angle between vectors of the stator current and the excitation current at the level of 45 degrees. The experimental static mechanical characteristics of the electric drive were obtained. These characteristics provide a limitation of the starting torque.
|Journal||E3S Web of Conferences|
|Publication status||Published - 25 Oct 2019|
|Event||2019 International Scientific and Technical Conference Smart Energy Systems, SES 2019 - Kazan, Russian Federation|
Duration: 18 Sep 2019 → 20 Sep 2019