Direct current motor with permanent magnets for the filter pump
Students Name: Pyrih Mykhailo Andriiovych
Qualification Level: magister
Speciality: Electrical Energetics, Electrical Engineering and Electromechanics
Institute: Institute of Power Engineering and Control Systems
Mode of Study: part
Academic Year: 2022-2023 н.р.
Language of Defence: ukrainian
Abstract: The object of research of this qualification work is the processes of electromagnetic conversion of electrical energy into mechanical energy of rotational movement. The subject of the study is a magnetoelectric excitation direct current direct current motor. The purpose of the work is to design a design of a DC motor with excitation from permanent magnets with a given power for long-term operation. In the first chapter of the master’s qualification work, an overview of the types and designs of direct current motors is performed, the varieties of modern electric motors with permanent magnets are considered, in particular, the designs of direct current motors of electromagnetic and magnetoelectric excitation [1]. Advantages and disadvantages of DC motors with permanent magnets are evaluated. In the second section, the justification of the adopted project decisions [1, 2, 3] is carried out. The issue of making the engine in the specified overall diameter has been resolved. A cylindrical structure with a toothed anchor was selected, with a structural design according to the IM2141 installation method, according to the degree of protection IR44, according to the cooling method IC00. In the third section, the results of the electromagnetic calculation are presented, the main dimensions of the motor, the type of armature winding are selected, the dimensions of the air gap between the armature and the permanent magnet, the magnetic circle are determined, the excitation winding, collector, brush holders, commutation parameters are calculated. The calculation of the magnetic system with ferrite permanent magnets was performed, taking into account the magnetization curve of the steel sections of the magnetic circuit, using the transient magnetic characteristic [4]. The calculation of losses and the coefficient of return was performed, as well as the calculation and construction of the operating characteristics of the engine [5] depending on the load power. The fourth chapter is devoted to the method of determining the magnetic induction in the working air gap using a simplified substitute electrical circuit. The calculation was performed using the Mathcad software application. The results are compared with those calculated by the classical method [1] in section 3. The heating calculation performed in the fifth chapter allowed us to conclude that the temperature excesses in the machine elements are not greater than those permissible for the heat resistance class of insulation F.. Keywords:DC motor, permanent magnets, cylindrical structure, inductor, filterunit, long-termoperation. Referenses: 1. А.Г.Морозов. Расчет электрических машин постоянного тока. – М.: Высшая школа, 1992. – 223 c 2. Проектирование электрических машин / Под ред. И.П.Копылова. -М.: Высшая школа, 2005. - 767 с. 3. Попічко В. В. Проектування електричних машин постійного струму: Навч. посібник: – Львів.: Видавництво НУ “Львівська політехніка”, 2004. – 584 с. 4. Ткачук В.І. Автоматизоване проектування колекторних двигунів постійного струму. Навчальний посібник. - Львів: Видавництво Львівської політехніки, 2005. - 348 с. 5. Електричні машини: підручник / М. А. Яцун ; Нац. ун-т «Львів. політехніка». — Л. : Вид-во Львів. політехніки, 2011. — 461, с.