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.
To increase the possibilities of application of alternating current electric drives with various control systems, including those mechanisms where the installation of a tachogenerator is inadmissible or undesirable, the Department of Electrical Machines and Automated Drive of LMI has developed a device that allows indirectly determine the speed of rotation, as well as the components of the stator and rotor flux-coupling of the induction motor (IM).
When organizing the control of the drive thyristor frequency converter - induction motor (TFC-AD) with sufficiently high speed, wide range of speed control and good economic indicators it is necessary on the basis of information about the coordinates of the AD state to form control actions on the frequency and voltage channels of TFC in accordance with certain algorithms.
The development of theory and practice of adjustable AC electric drives on the basis of valve frequency converters contributes in recent years to the wide implementation of such drives in various industries.
To generate transients of an induction motor, it is necessary to measure the stator or air gap flux-coupling. The most reliable flux sensor is a measuring coil located in the air gap or stator slots ...
