Wyniki wyszukiwania - BazTech

1

Calculation methods for eddy current losses with the example of a permanent magnet excited synchronous machine inside the threshing cylinder of a combine harvester

Schuffenhauer U., Michalke N.

Czasopismo Techniczne. Elektrotechnika

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2015

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Y. 112, iss. 1-E

241--250

EN

Electrical drives become more and more interesting for many applications in mobile machines including farming equipment. In this paper, the electromagnetic design of a threshing cylin der for an electrical combine harvester with a function-fitted external rotor and an inner stator is shown. Special attention will be paid to the calculation of the eddy current losses within the magnets through different FEM methods. The influence on the losses of segmentation of magnets in tangential and axial directions is shown.

PL

Napędy elektryczne stają się coraz bardziej atrakcyjne również w aplikacjach maszyn ruchomych, włączając w to również maszyny rolnicze. W niniejszym artykule omówiona została konstrukcja młockarni dla elektrycznego kombajnu zbożowego z zewnętrznym wirnikiem i wewnętrznym stojanem. Szczególną uwagę zwrócono na obliczenia strat prądów wirowych w obrębie magnesów z użyciem obliczeń MES. Pokazany został wpływ segmentacji magnesów w kierunku stycznym oraz osiowym na straty.

2

Analysis and optimisation of dynamic stability of mobile working machines

Bigos P., Faltinova E.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2014

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z. 84

53--60

EN

This paper describes an investigation of the dynamic stability, which is specified for the mobile working machines. There are presented the basic theoretical principles of the stability theory together with an introduction of two illustrative examples of the dynamic stability analysis.

PL

Niniejszy artykuł opisuje badanie stabilności dynamicznej ze szczególnym uwzględnieniem jezdnych maszyn roboczych. Opisano w nim podstawowe teoretyczne zasady teorii stabilności wraz z przedstawieniem dwóch przypadków ilustrujących analizę stabilności dynamicznej.

3

Simulation of vehicle working conditions with hydrostatic pump and motor control algorithm

Zavadinka P., Kriššák P.

Journal of Automation Mobile Robotics and Intelligent Systems

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2012

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Vol. 6, No. 3

40-46

EN

Emission rules have significant impact on market of mobile working machines. They bring new challenges for transmission, working, controlling and vehicle management functions. Extensive knowledge from design, control system, optimization, automation, signal processing, system modeling etc. are welcome to get answer how best to produce more efficient, productive machines. In case of new concepts is appropriate to create complex dynamic model of machine. Presented paper describes a four wheel drive model and simulation of a mobile working machine and the concept of hydrostatic pump and motor control algorithm in selected conditions.

4

Entwicklung eines Modellgestützten Kippsicherheitssystems für Mobile Arbeitsmaschinen

Sontheim F.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2010

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z. 4/80

93-101

EN

In the work presented here a security system for mobile working machines is described, which determines a safety value based on the movements of the working equipment. Subsequently, the control system responses to the movement of the machine and if necessary the whole system is stopped. The advantage of this development which is model based is a simple and low-cost sensor system. Moreover, the permanent identification of a safety value enables a full variable support of the working area. Consequently, the machine can be used more efficiently.

5

Improvement of lateral vehicle dynamics of mobile work machines by active implement entrainment

Bogala A.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2008

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z. 5/72

171--180

EN

Due to the raising amount of transport rides the focus on dynamic vehicle behaviour of mobile working machines with heavy duty implements is getting more and more important. While there are technically mature systems for the control of vertical dynamics, the area of lateral dynamics still offers much room for development. The studies depicted in the following article will offer a concept which significantly improves the steady and the transient steering behaviour by the means of intelligent implement movement. To this point the developed system has been analysed and evaluated by virtual road trials. The means for real road trials are being developed at the moment.

DE

Durch den steigenden Anteil von Transportfahrten gewinnt die Betrachtung der fahrdynamischen Eigenschaften mobiler Arbeitsmaschinen mit schweren Anbaugeräten immer mehr an Bedeutung. Während bereits ausgereifte Systeme zur Einflussnahme auf die Vertikaldynamik existieren, bietet die Querdynamik noch erhebliches Entwicklungspotential. Die im Folgenden dargestellten Untersuchungen zeigen ein Konzept auf, mit dem durch eine intelligente Bewegung des Anbaugerätes sowohl das stationäre als auch das instationäre Lenkverhalten erheblich verbessert werden kann. Das entwickelte Verfahren wurde bisher durch virtuelle Fahrversuche analysiert und bewertet. Die für eine Durchführung von realen Fahrversuchen erforderlichen Vorrichtungen befinden sich momentan in der Vorbereitung.