Electromagnetic moment of BLDC with nonmagnetic anchor under 180-degree commutation

2015 ◽  
Author(s):  
Anatoly V. Sapsalev ◽  
Olga B. Davidenko ◽  
Elena G. Kasatkina ◽  
Nikolay P. Savin ◽  
Sahbon A. Saidov
Keyword(s):  
Electromagnetic Moment

Submersible pumping unit with increased electromagnetic moment of the submersible electric motor

2021 ◽  
Author(s):  
Anton Gorodnov ◽  
Vladimir Kornilov ◽  
Majid Abdulhameed Al-Ali ◽  
Evgenii Fedorov
Keyword(s):  
Electric Motor ◽  
Submersible Electric Motor ◽  
Electromagnetic Moment ◽  
Pumping Unit

scholarly journals Brushless Electric Machines with Axial Magnetic Flux: Analysis and Synthesis

2021 ◽  
Author(s):  
Sergey Gandzha ◽  
Dmitry Gandzha
Keyword(s):  
Magnetic Flux ◽  
Computer Aided Design ◽  
Electric Machines ◽  
Engineering Practice ◽  
Flux Analysis ◽  
Electromagnetic Moment ◽  
Electromagnetic Power ◽  
Analysis And Synthesis ◽  
Aided Design

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.

Method for Determining the Parameters of an Induction Motor

2021 ◽  
Vol 64 (1) ◽  
pp. 30-36
Author(s):  
Yuri Kulinich ◽  
◽  
Sergey Shuharev ◽  
Alexander Kaminsky ◽  
Sergey Kovalenko ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Induction Motor ◽  
Asynchronous Motor ◽  
Rotation Frequency ◽  
Engineering Practice ◽  
Experimental Stand ◽  
Electromagnetic Moment ◽  
Stable Part ◽  
Pie Chart ◽  
New Iterative Method

The paper proposes a new iterative method for determining the parameters of an induction motor. The method is based on the measured values of no-load current and active resistance of the stator winding. The calculated parameters are used to build the mechanical characteristics of the engine. To assess its accuracy, a comparative analysis with a pie chart was carried out. In the practical part of the work, on the basis of the experimental stand, measurements were made of the magnitude of the electromagnetic moment of the investigated asynchronous motor AIR71A4 at different values of the rotation frequency on the stable part of the mechanical characteristic. In a comparative analysis of the calculated and experimental data, it was found that the proposed method has sufficient accuracy in calculating the primary parameters of the engine. This provides a basis for the practical use of the proposed calculation method in engineering practice

Execution of the NEC2 electromagnetic moment method code on the Inmos T800 Transputer

1988 ◽  
Vol 24 (16) ◽  
pp. 991 ◽  
Author(s):  
J.J. le Roux ◽  
P.J. Bakkes ◽  
J.J. du plessis ◽  
J.H. Cloete
Keyword(s):  
Moment Method ◽  
Electromagnetic Moment

An Electromagnetic Moment in Short Circuits in Electrical Rotating Machines with High-Coercivity Permanent Magnets

2017 ◽  
Vol 7 (2) ◽  
pp. 483 ◽  
Author(s):  
Flyur Ismagilov ◽  
Irek Khayrullin ◽  
Vyacheslav Vavilov ◽  
Valentina Ayguzina
Keyword(s):  
Computer Model ◽  
Permanent Magnets ◽  
Short Circuit ◽  
High Coercivity ◽  
Magnetic Flux Density ◽  
Simulation Data ◽  
Stator Core ◽  
Rotating Machine ◽  
Electromagnetic Moment ◽  
Short Circuits

<p>This paper presents a computer model of an electrical rotating machine with high-coercivity permanent magnets and research of various short-circuit types in the electrical rotating machine with high-coercivity permanent magnets, including turn-to-turn short circuit. Diagnostic criteria of short circuits are revealed. There are the electromagnetic moment and the magnetic flux density in the stator core back. With comparison the experiment and computer modeling results, it was found that the created computer model is highly accurate and completely repeats the experiment results. The numerical discrepancy between the experimental data and the simulation data is below 5%. The obtained results can be used in practice in the design of the electrical rotating machine with high-coercivity permanent magnets.</p>

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

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.

Calculation of the Parameters of a Mathematical Model of an Electric Hybrid Stepper Motor Based on the Analysis of the Magneto Static Field Pattern

2019 ◽  
Vol 20 (8) ◽  
pp. 482-489
Author(s):  
S. V. Volkov ◽  
O. V. Goryachev ◽  
A. G. Efromeev ◽  
A. O. Stepochkin
Keyword(s):  
Mathematical Model ◽  
Natural Frequency ◽  
Electric Drive ◽  
Magnetic Circuit ◽  
Stepper Motor ◽  
Design Parameters ◽  
System Of Equations ◽  
Magnetostatic Field ◽  
Resonant Frequencies ◽  
Electromagnetic Moment

The article presents a solution to the problem of calculating the parameters of a mathematical model of an electric hybrid stepper motor based on an analysis of the picture of its magnetostatic field. The main disadvantage of such an engine described. Is the mid-frequency resonance, which occurs due to the coincidence of the natural frequency of the rotor with the frequency of the supply voltage pulses. The necessity of taking this factor into account when designing a discrete electric drive system based on the executive motor of this type by calculating the values of resonant frequencies and using them in developing the drive control algorithm is shown. The task of developing a mathematical model of the engine is formulated, which allows to analyze the influence of its design parameters on the spectrum of resonant frequencies. The method of calculating the parameters of a given mathematical model is formed. The variants of the mathematical description of this electric machine are considered and the selection of its known mathematical model is made based on the equivalent electric circuit. The numerical calculation of the spatial pattern of the magnetostatic field of the electric motor is performed. Based on the analysis of the calculation results, a system of assumptions has been formed to develop an equivalent magnetic circuit of an electrical machine. An equivalent magnetic circuit and the corresponding system of equations has been developed. Formed a system of equations of a mathematical model based on the equivalent circuits of the electric and magnetic circuits.On the basis of the obtained system of equations, a simulation model of a discrete electric drive was developed in the Simulink software package. Using the obtained simulation model, the calculation of transients on the angle of rotation of the rotor and the electromagnetic moment is carried out and the influence of one of the design parameters on the natural frequency of the rotor is analyzed. Based on the simulation results, it is shown that with an increase in the air gap height of a hybrid stepper motor, the resulting electromagnetic moment decreases, and the natural oscillation frequency of the rotor decreases, and the frequency at which medium-frequency resonance occurs also decreases. This mathematical model can be used at the stage of the correct calculation of the selected engine, since allows you to analyze the effect of a specific design parameter of the machine — in particular the size of the air gap on the natural frequency of the rotor, and, consequently, on the spectrum of the resonant frequencies of a discrete electric drive.

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