A simple and accurate method for the experimental performance evaluation of high speed sensorless brushless dc motors

Nagorny, Aleksandr

doi:10.1109/iemdc.2009.5075313

Cited by 4 publications

(3 citation statements)

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“…Moreover, for DC and synchronous machines working at medium and high speeds, the back EMF can be easily obtained Fig. 9 Step connection using the system performance [23,30,32]. Another aspect to consider when choosing sensorless methods is the accuracy needed in the system.…”

Section: Sensorless Measurementmentioning

confidence: 99%

“…For example, in [29, 31] the resistance of the system must be estimated using high‐frequency signals. Moreover, for DC and synchronous machines working at medium and high speeds, the back EMF can be easily obtained using the system performance [23, 30, 32]. Another aspect to consider when choosing sensorless methods is the accuracy needed in the system.…”

Section: Sensorless Measurementmentioning

confidence: 99%

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Modelling of reduced electromechanical interaction system for aircraft applications

Ahumada¹,

Wheeler

2019

IET Electric Power Applications

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Rotational systems such as aircraft engine drivetrains are subject to vibrations that can damage shafts. Torsional vibrations in drivetrains can be excited by the connection of loads to the generator due to electromechanical interaction. This problem is particularly relevant in new aircraft because the drivetrain is flexible and the electrical power system (EPS) load is high. To extend the lifespan of the aircraft engine, the electromechanical interaction must be considered. Since real-time constants of the electrical and mechanical systems have very different magnitudes, the simulation time can be high. Furthermore, highly detailed models of the electrical system have unnecessary complexity for the study of electromechanical interactions. For these reasons, modelling using reduced order systems is fundamental. Past studies of electromechanical interaction in aircraft engines developed models that allow the analysis of the torsional vibration, but these are difficult to implement. In this study, a reduced order electromechanical interaction system for aircraft applications is proposed and validated using experimental results. The proposed system uses a reduced drivetrain, simplified EPS, and sensorless measurement of the vibrations. The excitation of torsional vibrations obtained is compared with past studies to prove that the reduced order system is valid for studying the electromechanical interactions.

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Section: Sensorless Measurementmentioning

confidence: 99%

Section: Sensorless Measurementmentioning

confidence: 99%

Modelling of reduced electromechanical interaction system for aircraft applications

Ahumada¹,

Wheeler

2019

IET Electric Power Applications

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“…Since model with two turns has proved more advantageous, static characteristics have been tested for this model and selected test results are shown in Figures 12-14. Tested drive scheme is shown in Figure 11 (Nagorny, 2009). The following abbreviations have been used here: EC electronic commutator.…”

Section: Pm Bldc Motor and Drive Lab Testsmentioning

confidence: 99%

Computer analysis of high‐speed PM BLDC motor properties

Krykowski

Hetmańczyk

Gałuszkiewicz³

et al. 2011

COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -The purpose of this paper is to elaborate a method of computer analysis of high-speed motor with specific parameters and verifying the obtained results, i.e. computer models by experimental (laboratory) tests. Design/methodology/approach -In order to determine motor properties from the viewpoint of energy conversion, a model using FEM was worked out with the help of Maxwell software. To determine static and dynamic properties of both motor and drive, Matlab/Simulink models were used; one of these models was a built-in (library) model, the other one was proposed by the authors. Findings -The new analysis method and model of high-speed motor have been carried out.Research limitations/implications -The permanent magnet brushless direct current high-speed motor was the subject of the research. In the first part of the research, the properties of the motor were determined by using finite element method. Practical implications -The laboratory prototype can be a starting point in establishing the production of the high-speed motors with rotational speed in the range of 50,000-100,000 rpm. Social implications -At this moment, there are several possible application of the high-speed motor and it should be expected that other new applications can appear in near future after the start of the production. Originality/value -The paper shows that the computer-based analysis method determines the motor properties accurately. It is also pointed out that a motor with half-open slots has advantageous properties. The new simulation model of high-speed motor has been carried out. This model allows taking into account some imperfections caused by slots and rectangular cross-section magnets.

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