A small low-speed generator with permanent magnetic excitation for wind turbine
Students Name: Lishchynskyi Volodymyr Bohdanovych
Qualification Level: magister
Speciality: Energy Security
Institute: Institute of Power Engineering and Control Systems
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: ABSTRACT Lishchynskyi V.В.A small low-speed generator with permanent magnetic excitation for wind turbine, 68 pages,7 tables, 25 figures, 13 bibliographic references. Supervisor - Senior Research Fellow, PhD, associate professor Kharchyshyn Bohdan Mykhailovych. The object of study of this qualification work are the processes of electromagnetic conversion of mechanical energy of rotational motion into electrical energy. The subject of the study is a contactless DC generator of permanentmagnetic excitation. The purpose of the work is to design the design of a DC generator with excitation from permanent magnets with a given power for operation in long-term mode. In the first section of the master’s qualification work thereviewoftypesanddesignsofwindpowerplantsiscarriedout, varietiesofmodernelectricgeneratorsforwindpowerplantsareconsidered, the review of modern designs of generators of direct current of electromagnetic and permanentmagnetic excitation is executed[1]. The analysis of the influence of the generator armature reaction with excitation from rare earth permanent magnets on the main armature field and, consequently, on the energy parameters of the contactless generator is performed. In the second section the substantiation of the accepted design decisions is carried out[2, 3]. The issue of execution of the generator in the set limited overall diameter is solved. A cylindrical design with a smooth armature is selected, which provides a flow of cooled air with a design according to the method of installation IM4701, the degree of protection IP45, the method of cooling IC41. The third section presents the results of electromagnetic calculation, selected the main dimensions of the generator, the type of armature winding, determined the size of the air gap between the armature and the permanent magnet, the magnetic circuit. The calculation of a magnetic system with permanent magnets of rare-earth type is performed taking into account the magnetization curve of steel sections of the magnetic circuit, using a simplified substitute electrical circuit[4]. The calculation of losses and recoil coefficient is performed, as well as the calculation and construction of external characteristics of the generator depending on the load and speed of the rotor. The fourth section is devoted to determining the dependence of the recoil factor on the load and speed of the rotor. It is made using the Mathcad software application. The calculation of the cost of the designed wind turbine and its payback period, performed in the fifth section, allowed us to draw conclusions about the feasibility of using it as an alternative source or as a backup in emergencies. Keywords:windgenerator, rareearthpermanentmagnets, cylindricaldesign, inductor, windpowerplant, paybackperiod. Referenses: 1. Неисчерпаемаяэнергия. Кн. 1. Ветрогенераторы / В.С.Кривцов, А.М. Олейников, А.И.Яковлев. – Учебник. – Харьков: Нац. аэрокосм. ун-т "Харьковскийавиационныйинститут", Севастополь: Севаст. нац. техн. ун-т, 2003. –400 с. 2. Попічко В. В. Проектування електричних машин постійного струму: Навч. посібник: – Львів.: Видавництво НУ “Львівська політехніка”, 2004. – 584 с. 3. Харчишин Б. М. / Основні конструктивні співвідношення лінійного генератора імпульсної дії / Б. М. Харчишин, М. В. Хай, Б. Г. Бойчук, М. М. Радович // Електроенергетичні та електромеханічні системи. – 2020, Вип. 2, № 1. – С. 88-94. 4. Електричні машини: підручник / М. А. Яцун ; Нац. ун-т «Львів. політехніка». – Л. : Вид-во Львів. політехніки, 2011. – 461, с.