Der einfachste Elektromotor der Welt: Spielwiese

Schlichting, Hans Joachim; Ucke, Christian

doi:10.1002/piuz.200401057

Cited by 4 publications

(3 citation statements)

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“…2. 2,3,5,8 The magnet produces a magnetic fieldB which is essentially homogeneous inside the magnet, pointing parallel to its axis. According to the Lorentz force, each radial current element id' of length jd'j and current intensity i experiences a force dF given by dF ¼ id' ÂB:…”

Section: Explanation Based On the Field Conceptmentioning

confidence: 99%

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Ampère’s motor: Its history and the controversies surrounding its working mechanism

Assis

Chaïb

2012

American Journal of Physics

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In 1822 Ampère created a new kind of motor when he succeeded in spinning a cylindrical magnet around its axis by connecting it to a battery generating a steady current. Nowadays, it is easy to present such a motor in the classroom utilizing a neodymium magnet, a D battery, a steel nail, and a short piece of copper wire. Although it is very simple to observe the rotation, the explanation of this effect is still under dispute. This work presents the history of this motor including the controversy between Ampère and Faraday, as well as the modern explanation based on the field concept. We emphasize the positive outcomes to be gained in the classroom by presenting this device to students. V

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Section: Explanation Based On the Field Conceptmentioning

confidence: 99%

“…In this work, we discuss a device that has been aptly called "the simplest motor." 2,3 It has also been called a "homopolar motor." [4][5][6][7] Beyond exploring the simplicity of this device, we emphasize here the fascinating history of this motor, which goes back almost 200 years.…”

Section: Introductionmentioning

confidence: 99%

Ampère’s motor: Its history and the controversies surrounding its working mechanism

Assis

Chaïb

2012

American Journal of Physics

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“…Recently, interest in this very old form of motor was revived when very strong neodymium disc magnets were used in place of substantially weaker alnico (aluminium-nickel-cobalt) permanent disc magnets for the conducting disc of the motor [10,11].…”

Section: A Simple Homopolar Motormentioning

confidence: 99%

Some simple demonstration experiments involving homopolar motors

Stewart¹

2007

Rev. Bras. Ensino Fís.

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The ready availability of very strong permanent magnets in the form of rare-earth magnetic alloys such as neodymium-iron-boron has lead to renewed interest in one of the oldest types of electric motors -the homopolar motor. The ease with which a demonstration homopolar motor can now be built and operated when neodymium magnets are used is quite remarkable. In this paper some simple homopolar motors employing neodymium magnets suitable for demonstrational purposes are described and discussed. Keywords: homopolar motor, homopolar roller, neodymium magnets, driven wheel, Lambert W function.A atual disponibilidade deímãs permanentes muito fortes na forma de ligas magnéticas de terras raras, como neodímio-ferro-boro, levou ao interesse renovado em um dos mais antigos motores elétricos -o motor homopolar. E notável a facilidade com que as demonstrações comímãs de neodímio podem ser construídas e operacionalizadas. Neste artigo são descritos alguns simples motores homopolares que usamímãs de neodímio apropriados para demonstrações no ensino. Palavras-chave: motores homopolares,ímãs de rolete homopolares, neodímio, função W de Lambert.

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Amazing Vibrations Within the Homopolar Motor

Bednarek

2018

The Physics Teacher

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The most common type of homopolar motor comprises a cylindrical neodymium magnet, a battery, and a non-ferromagnetic frame rotating around the battery. Here, the author substituted a coiled spring for the frame. Due to this change, a new and intriguing effect emerges, the axial buzzing of the spring during its rotation. This paper describes the construction of this motor and explains the reasons for the observed vibrations.

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Der einfachste Elektromotor der Welt: Spielwiese

Cited by 4 publications

References 1 publication

Ampère’s motor: Its history and the controversies surrounding its working mechanism

Ampère’s motor: Its history and the controversies surrounding its working mechanism

Some simple demonstration experiments involving homopolar motors

Amazing Vibrations Within the Homopolar Motor

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