Optimization of the synchronous motor with hybrid permanent magnet excitation system

Abstract

Purpose -The purpose of this paper is to elaborate an algorithm and the software for the rotor structure optimization of the permanent magnet synchronous motor (PMSM) with a magnet composed of two materials made with the use of different technologies: sintered Neodymium magnets and powder dielectromagnets. To execute of optimization of selected motor structure using the non-deterministic procedure. Design/methodology/approach -The mathematical model of the devices includes: the equation of the electromagnetic field, the electric circuit equations and equation of mechanical motion. The numerical implementation is based on finite element method and step-by-step algorithm. The genetic algorithm has been applied in the optimization procedures. The computer code has been developed. Findings -The elaborated computer software has been applied for the optimization and design of PMSMs. The elaborated algorithm has been tested and a good convergence has been attained. The parameters of two optimal structures of PMSM motors have been compared. Originality/value -The presented approach and computer software can be successfully applied to the design and optimization of different structure of PMSM with different type of rotors. IntroductionThe continuous development of materials engineering has made it possible to produce permanent magnets of high energy density, with better magnetic and thermal properties. Nowadays, manufacturers and users of electrical machines pay special attention to energy efficiency of the devices. Hence, in order to make permanent magnet motors more and more efficient there is an enormous interest in the development of their constructions. In comparison to other types of electrical machines, the permanent magnet synchronous motors (PMSMs) have many advantages: high efficiency, low operating costs, long operational life, large torque-to-mass ratio and good dynamics performance (Lindth et al., 2009). Diversity of motors applications and variety of permanent magnet types have an essential effect on the structures of this kind of machines. The PMSM rotor construction, i.e. location, size and shape of the permanent magnets has substantial effect on the machine properties (Barcaro and Bianchi, 2013). The magnets may be glued to the rotor surface (surface mounted magnet) or buried in the rotor (buried magnet) (Hahn, 2012;Faggion et al., 2013).Recent years have witnessed rapid development of magnetic powder technology. This concerns both: soft and hard magnetic material. The powder technology enables free formation of the element geometries and control over their magnetic properties -depending on the admixtures used. The design and construction of excitation systems consisting of two or more different materials is also possible (Nowak, 2013).

Methodology for Cage Shape Optimization of a Permanent Magnet Synchronous Motor Under Line Start Conditions

“…OPTIMIZATION ALGORITHM Despite the implementation of the efficient strategy for code parallelization, the optimization process remains computationally time consuming due to the need for repetitive simulations with the continuously varied cage parameters; hence the need for an effective optimization algorithm. Many alternatives were considered, including genetic [3], particle swarm [6] and ant colony algorithms [7], as well as the less popular brain storm [8], bat-inspired [9] and gray wolf optimizers [10]. Following intensive search and testing, it was decided to rely on the well performing particle swarm approach, with a modification of an added coefficient representing the swarm center.…”

“…Various optimization methods were considered, including an approach described in [3]. Following many tests and practical experience with numerical analysis, it was decided that methods exploiting particle swarm optimization (PSO) were most appropriate for the efficient design of the LSPMSM.…”

Specificity of energetic functioning of economic activity objects

“…Human in their economic and existential activities make many choices optimizing them [17][18][19][20][21]. They use various mathematical methods, apply appropriately selected technical means, and make decisions based on knowledge or well-established experience or resulting from specific premises related to the undertaken activities.…”

“…They use various mathematical methods, apply appropriately selected technical means, and make decisions based on knowledge or well-established experience or resulting from specific premises related to the undertaken activities. People try to achieve the objectives in the simplest possible way, limiting the consumption of raw materials and energy, involving as little technical and human resources as possible, eliminating the negative impact of the technical infrastructure on the environment (including other systems operating in the environment) [17][18][19][20][21][22][23]. One of the elements of such optimal functioning is limiting the impact of electromagnetic disturbances and energy losses generation in devices and systems used in various types of public facilities.…”

Statistical analysis of the electric energy production from photovoltaic conversion using mobile and fixed constructions

“…People try to achieve their goals in a way most beneficial for them. This is associated with a great variety of optimization criteria, methods of creating criterial functions and the used methods, which depend on a given task [4,5,22,[28][29][30][31][32][33][34][35][36].…”