Автоматизовані електромеханічні системи УДК 621.317:621.313.3 БЕЗРЕДУКТОРНЫЙ ЭЛЕКТРОПРИВОД РОТОРА ЭЛЕКТРОМАГНИТНОГО СЕПАРАТОРА В. П. Стяжкин, О. А. Зайченко, С. И. Гаврилюк Институт электродинамики НАН Украины Аннотация. Предложено применение безредукторного электропривода для ротора электромагнитного сепаратора вместо электропривода с общепромышленным высокоскоростным асинхронным двигателем и редуктором. Показан принцип действия дугостаторной машины и электромагнитного роторного сепаратора. Проведен предварительный расчет габаритных размеров дугостаторной машины для ротора электромагнитного сепаратора. Приведены типовые механические характеристики безредукторных асинхронных электродвигателей и механические характеристики дугостаторной машины. А также, показаны преимущества безредукторного электропривода и пути повышения эффективности работы в системе с ротором электромагнитного сепаратора. Ключевые слова: электромагнитный роторный сепаратор, безредукторный электропривод, дугостаторный асинхронный электродвигатель. Введение

The development of a reliable gearless electric drive for antennas of ship radars is an important problem. To solve the problem, this article proposes to use an axial induction motor (AIM) with a massive bimetallic disk-shaped rotor. The AIM model is presented, which consists of three computational domains with the boundary condition of symmetry. To calculate the electromagnetic field, a well-known analytical method of integral transformations is used taking into account the variable along the radial coordinate of the linear speed of the rotor. Ready-to-use expressions are presented for the development of a program for the numerical calculation of the magnetic field and energy characteristics of the motor. Algorithm is developed for calculating the dimensions of the AIM, operating at different speeds with a frequency converter. The numerical calculation program is used to calculate the dimensions AIM. It uses well-known recommendations for the parameters of the electromagnetic field in the magnetic core and in the air gap. The calculation of the dimensions of the AIM for ship radars “Mius” is performed. The dependence of the efficiency on the current frequency for different rotor’s frequencies is investigated. The energy indicators of the AIM are investigated at a variable torque on the shaft and at different rotor speeds. The parameters of the power source for the AIM of ship radars are established. References 20, figures 5, tables 3.

The calculation and analysis of the aerodynamic loads of the ship’s antenna radar station are carried out. An expression is obtained of the dependence of the torque on the shaft of the antenna drive on its rotation speed, rotation angle, speed and direction of wind flow, on the basis of which a device is implemented for indirect measurement of the load torque. Has been synthesized a combined automatic control system for a gearless arc-core electric drive of the radar station antenna, the main channel of which operates according to the deviation control principle with a closed speed control loop, and the second channel, which operates according to the disturbance control principle (load torque) and has an open loop. Studies had confirmed the effectiveness of combined control, the use of corrective loop allows compensate the load effect on a given value of the speed of the antenna. References 12, figures 4.

Features of control of high-gradient electromagnetic rotary separators are considered. Structural diagrams of control systems with fuzzy logic controllers of the process of high-gradient electromagnetic separation are given. A new block diagram of a hybrid control system for a rotary-type electromagnetic separator combining classical and intelligent con-trol methods has been proposed. The example of a rotary electromagnetic separator shows that hybrid control methods can significantly increase energy efficiency in electrical technologies with current sources in power circuits with an incomplete definition of system parameters. Ref. 10, fig. 4.

The synthesis of a fuzzy proportional-integral-differential speed regulator of the arc stator electric drive of the rotation of the radar station antenna with combined control was carried out. The structural diagram of the fuzzy regulator was developed, the input and output linguistic variables are defined, the rule base was compiled, the dependence surfaces of the output control variable on the input coordinates are obtained. A simulation model of an electric drive in the Matlab system with a synthesized fuzzy logic regulator based on a two-phase model of an asynchronous arc-stator motor was built. Modeling of the nominal and the most difficult mode of operation of the electric drive was carried out, graphs of transient processes were obtained, which confirm its operability even under conditions of extreme loads. Refreces 9, figures 7, table 1.