The description of the automation means intended for automatic giving of reagents in process of flotation for the purpose of achievement of a maximum quantity of a ready concentrate, and for the exact account of the expense of reagents, diagnostics of refusal of feeders and forecasting of the rest for the change end is given. The description of work of installation of reagents dispensing in a mode of local regulation and in structure ASUTP of concentrating factory is given.
Advantages of application of the active rectifier as a part of converters of frequency for powerful drives with ventilniy electric motors are considered. The mathematical description of the processes proceeding in a power part of the active rectifier is given. The scheme of a drive with a vector control system with the gage of position of a rotor and the active rectifier is presented, schedules of power consumption and a current by a drive with the active rectifier are resulted.
The description is given and the function chart of the bench installation is resulted, allowing to reproduce static and dynamic modes of adjustable electric drives of an alternating current. The modes considered during experimental researches of the electric drive on the basis of the synchronous electric motor, working in a mode of ventilniy electric motor are listed. Conclusions are drawn on character of course of dynamic modes, comparison of the electric drive to the synchronous electric motor and the electric drive of a direct current with the subordinated regulation is given.
