4 research outputs found
Towards an improved energy efficiency of the interior permanent magnet synchronous motor drives
This paper investigates the possibility of energy efficiency increase in the
drives with high speed permanent magnet synchronous motors. The losses are
decreased by the proposed procedure, i.e. proper allocation of the available
stator current capacity to the direct and quadrature current components. The
approach provides increased energy efficiency by varying the ratio between
copper and iron losses. [Projekat Ministarstva nauke Republike Srbije, br. III042004
UnaprijeÄeno upravljanje momentom visokobrzinskog pogona s asinkronim motorom bez mjerenja brzine
This paper presents improved torque control scheme for a high speed sensorless induction motor drive. The proposed high speed torque control scheme substitutes the flux oriented control by the voltage angle control in the flux weakening regime. This scheme uses maximum of available inverter voltage, alleviates well known problems of current control schemes in conditions with insufficient voltage margin and avoids the influence of estimated speed error to the achieved flux level. The algorithm uses similar slip control as flux oriented control algorithm, but is applied without an outer flux trajectory reference which is typical for the flux weakening, providing a fast and well damped torque response even if error in estimated speed is present. Experiments confirm the effectiveness of proposed torque control algorithm, smooth transition from the flux oriented control in the base speed region to the voltage angle control in the flux weakening, superior dynamic performance of the voltage angle torque control, and its robustness to an estimated rotor speed error.U radu je predstavljena unaprijeÄena shema upravljanja za pogon visokobrzinskog asinkronog motora bez mjerenja brzine. Predloženi postupak zamjenjuje vektorsko upravljanje upravljaÄkom strukturom s upravljanjem kutom napona u slabljenju polja. Predložena shema koristi maksimalni raspoloživi napon invertora, eliminira dobro poznate probleme strujno reguliranih pogona u uvjetima s nedovoljnom rezervom napona i eliminira utjecaj greÅ”ke u estimaciji brzine na dostignutu razinu toka. Algoritam koristi sliÄnu kontrolu klizanja kao i vektorsko upravljanje, ali bez tipiÄnog vanjskog zadavanja toka u slabljenju polja, pružajuÄi brz i dobro priguÅ”en odziv momenta Äak i u sluÄaju greÅ”ke u estimaciji brzine. Eksperimenti izvedeni na velikoj brzini vrtnje potvrÄuju uÄinkovitost predložene regulacije momenta, gladak prijelaz iz baznog podruÄja brzine u slabljenje polja, vrhunske dinamiÄke performanse upravljanja kutom napona i robusnost na pogreÅ”ku u estimiranoj brzini vrtnje
RužiÄka days : International conference 18th RužiÄka Days āToday Science ā Tomorrow Industryā : Proceedings
Proceedings contains articles presented at Conference divided into sections: chemical analysis and synthesis, chemical and biochemical engineering, food technology and biotechnology, medical chemistry and pharmacy, environmental protection and meeting of young chemists