Regulation unbalanced electromagnetic moment in a system of mutual loading electric machines DC

An analysis of electric machines with axial magnetic flux is given. First, the effect of commutation on the electromagnetic moment and electromagnetic power is analyzed. Two types of discrete switching are considered. The analysis is performed for an arbitrary number of phases. The first type of switching involves disabling one phase for the duration of switching. The second type of switching involves the operation of all phases in the switching interval. The influence of the pole arc and the number of phases on the electromagnetic moment and electromagnetic power is investigated. The conclusion is made about the advantage of the second type of switching. It is recommended to increase the number of phases. Next, the classification of the main structures of the axial machine is carried out. Four main versions are defined. For each variant, the equation of the electromagnetic moment and electromagnetic power is derived. This takes into account the type of commutation. The efficiency of the selected structures is analyzed. The comparative analysis is tabulated for choosing the best option. The table is convenient for engineering practice. This chapter forms the basis for computer-aided design of this class of machines.

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Comparison of Designs of a Valve-Inductor Motor of an Electric Spindle Drive

Известия высших учебных заведений Электромеханика ◽

10.17213/0136-3360-2020-6-15-20 ◽

2020 ◽

Vol 63 (6) ◽

pp. 15-20

Author(s):

Pavel Kolpakhch'yan ◽

◽

Boris Lobov ◽

Oleg Peregudov ◽

◽

...

Keyword(s):

Initial Data ◽

Software Package ◽

Electric Machines ◽

Electric Machine ◽

Flow Coupling ◽

Electromagnetic Moment ◽

Three Phase ◽

Inductor Motor ◽

The Given

When designing electric machines, in particular, the valve-inductor motor of the electric spindle drive, there is a need to compare several designs of such machines in order to choose the most rational one. Based on the given initial data and preliminary calculations, two design variants of the engine were selected: three-phase and five-phase. For each variant, the FEMM v 4.2 software package has been used to calculate optimal geometric ratios based on the maximum of the average moment value. Then, for the optimal variants of a three-phase and five-phase machine, calculations of the voltage, current, and flow coupling of the stator phase, as well as the electromagnetic moment, were performed. It is shown that in a five-phase electric machine, the total electromagnetic moment has several times lower pulsations compared to the three-phase version.

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INCREASE IN THE ELECTROMAGNETIC MOMENT OF A SUPERMINIATURE ELECTRIC MOTOR EXCITED BY RARE EARTH PERMANENT MAGNETS

Vestnik Chuvashskogo universiteta ◽

10.47026/1810-1909-2021-1-111-121 ◽

2021 ◽

pp. 111-121

Author(s):

Roman A. Romanov ◽

Tatyana V. Myasnikova ◽

Alexey N. Matyunin

Keyword(s):

Rare Earth ◽

Permanent Magnet ◽

Edge Effects ◽

Electric Motor ◽

Permanent Magnets ◽

Electric Machines ◽

The Body ◽

Excitation System ◽

Electromagnetic Moment ◽

Fiber Technology

The article is devoted to improving the energy and performance characteristics of superminiature electric motors, which are widely used in modern devices of robotics and mechanotronics. With the development of digital and Autonomous robotic systems, the tasks of improving the efficiency of Executive micromechanisms that affect the functionality and duration of work in offline mode have become particularly relevant. Traditional design and technological solutions used in higher-power electric machines are not scalable to the field of superminiature electric machines. Domestic and foreign developers offer various design options and manufacturing technologies. The key design feature of the electric motor under consideration is a glass stator made by polycapillary fiber technology and an excitation system from rare-earth permanent magnets. In the wall of the glass case, holes are evenly distributed around the circumference, in which the control winding is laid. The motor excitation system is a two-pole permanent magnet located on the rotating rotor shaft. The purpose of the research is to determine the effect of changing the design of the excitation system by changing the location of the magnetic poles. The research uses software that simulates the electromagnetic field using the finite element method. In the course of research, it was found that a decrease in the body of a permanent magnet leads to a decrease in the electromagnetic moment, which is not compensated by a decrease in edge effects at the boundary of the poles of the magnet. However, an increase in the value of the maximum magnetic induction in the air gap allows us to conclude that edge effects at the pole boundary have a significant effect on reducing the energy characteristics of superminiature micromachines. Thus, the solutions proposed in this paper are not sufficient to increase the efficiency of the engine, but the data obtained indicate the need to reduce the edge effects of permanent magnets.

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REGULATION OF UNBALANCED ELECTROMAGNETIC MOMENT IN MUTUAL LOADING SYSTEMS OF ELECTRIC MACHINES OF TRACTION ROLLING STOCK AND MULTIPLE UNIT OF MAINLINE AND INDUSTRIAL TRANSPORT

Science and Transport Progress Bulletin of Dnipropetrovsk National University of Railway Transport ◽

10.15802/stp2014/32965 ◽

2014 ◽

Vol 0 (6(54)) ◽

pp. 70 ◽

Cited By ~ 1

Author(s):

A. M. Afanasov

Keyword(s):

Electric Machines ◽

Rolling Stock ◽

Electromagnetic Moment ◽

Multiple Unit

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Preload dependent material properties of lamination stacks for electric machines

Materials Testing ◽

10.3139/120.111434 ◽

2019 ◽

Vol 61 (12) ◽

pp. 1192-1196

Author(s):

Daniel Loos ◽

Endre Barti ◽

Rainer Wagener ◽

Tobias Melz

Keyword(s):

Material Properties ◽

Electric Machines

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Genetic algorithm application for optimization of geometry of synchronous electric motor with permanent magnets by criterion of electromagnetic torque

Issues of radio electronics ◽

10.21778/2218-5453-2019-10-56-62 ◽

2019 ◽

pp. 56-62

Author(s):

I. N. Belezyakov ◽

K. G. Arakancev

Keyword(s):

Genetic Algorithm ◽

Electric Motor ◽

Permanent Magnets ◽

Evolutionary Optimization ◽

Electric Machines ◽

Geometric Parameters ◽

Geometrical Parameters ◽

Electromagnetic Torque ◽

Automatic Control Systems ◽

Optimization Of Geometry

At present time there is a need to develop a methodology for electric motors design which will ensure the optimality of their geometrical parameters according to one or a set of criterias. With the growth of computer calculating power it becomes possible to develop methods based on numerical methods for electric machines computing. The article describes method of a singlecriterion evolutionary optimization of synchronous electric machines with permanent magnets taking into account the given restrictions on the overall dimensions and characteristics of structural materials. The described approach is based on applying of a genetic algorithm for carrying out evolutionary optimization of geometric parameters of a given configuration of electric motor. Optimization criteria may be different, but in automatic control systems high requirements are imposed to electromagnetic torque electric machine produces. During genetic algorithm work it optimizes given geometric parameters of the electric motor according to the criterion of its torque value, which is being calculated using finite element method.

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