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Vol 150 No 1
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Research article
Mining electromechanics

Control of synchronous drives of stationary plants during start-up

E. V. Tatarenkov1
D. A. Ustinov2
About authors
  • 1 — Student, research assistant G.V. Plekhanov Saint Petersburg Mining University
  • 2 — Postgraduate student G.V. Plekhanov Saint Petersburg Mining University
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The necessity of forming the specified starting characteristics of stationary plants of mining enterprises with synchronous drive of medium and high power is shown. The synchronous motor with excitation system with two-way converter is considered. This excitation system meets the technical requirements for the considered types of drives. When starting and self-starting the motor, the bilateral converter is used as an inverter, and during synchronous operation as a controlled rectifier. At the same time, its operating mode depends on the voltage level in the supplying network and the value of the current induced in the field winding of the motor. It seems necessary to consider the issues of stable operation of the two-way converter in the inverter mode and to investigate the motor starting characteristics with this system in order to obtain the corresponding analytical dependences and calculation methods. Idealized dependences of the maximum value of the inverted current on the control and commutation angles and the parameters of the power transformer were obtained. When analyzing these dependences, it is determined that in real conditions, the maximum value of the control angle at the same parameters of the power transformer and the value of current i f is less than in the idealized ones.

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