Abstract
Asynchronous electric drives with thyristor voltage regulators form a class of systems applied for a large field of mechanisms of both a prolonged and cycle action including the mechanisms coming to a stop at the position defined. The digital TVR-AM system structure, the software for them and the special programme package which allow us to solve the designing problems of the electric drives, beginning from a motor power choice and regulators' synthesis up to the appraisal of their dynamic and energetics indices, are considered. INTRODUCTION TVR-AM systems are providing a three phase asynchronous short-curcuit (phase-rotor) motor operating regimes control by regulating the first harmonic of stator three-phase voltage VI, or an average value of direct voltage Vd. TVR is usually constructed on the basis of back-to-back thyristor pairs in stator phases.TVR with automatic control system are providing all the necessary-start,stop,speed and position-adjusting regimes, optimization of the energy consumed by electric drive (ED). Taking into account the above mentioned TVR-AM posibilities they are recommended for positional mechanizms,mechanizms with cycle operating and short-time speed lowering and also for turbo mechanizms (pumps,ventilators). When using the above mentioned electric drive systems one has to solve a number of problems connected with such systems designing and adjusting, for example, motor power choosing,regulators synthesizing, dynamic properties valuation,TVR influence on power supply analyzing, ED adjusting etc. For solving these problems a software has been created and discussed in the report. Transactions on Engineering Sciences vol 3, © 1993 WIT Press, www.witpress.com, ISSN 1743-3533 154 Software Applications in Electrical Engineering Ua Ub Uc to ECM to OD
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