Energy saving system of cascade variable frequency induction electric drive

V. N. Meshcheryakov, D. V. Lastochkin, Z. M. Shakurova, Stanimir Valtchev

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)
2 Downloads (Pure)


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.

Original languageEnglish
Article number01037
JournalE3S Web of Conferences
Publication statusPublished - 25 Oct 2019
Event2019 International Scientific and Technical Conference Smart Energy Systems, SES 2019 - Kazan, Russian Federation
Duration: 18 Sep 201920 Sep 2019


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