{"id":3214,"date":"2018-07-12T09:51:58","date_gmt":"2018-06-28T18:13:01","guid":{"rendered":"http:\/\/commons.princeton.edu\/josephhenry\/faraday-motor\/"},"modified":"2023-07-06T13:50:31","modified_gmt":"2023-07-06T18:50:31","slug":"faraday-motor","status":"publish","type":"page","link":"https:\/\/commons.princeton.edu\/josephhenry\/faraday-motor\/","title":{"rendered":"Faraday Motor"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-803\" src=\"http:\/\/commons.princeton.edu\/josephhenry\/wp-content\/uploads\/sites\/71\/2018\/07\/FaradayMotor.jpg\" alt=\"\" width=\"461\" height=\"483\" \/><\/p>\n<p><a href=\"http:\/\/commons.princeton.edu\/motorcycledesign\/wp-content\/uploads\/sites\/70\/2018\/06\/faraday_motor.pdf\">faraday_motor.pdf<\/a><\/p>\n<h5><em><strong>Michael Faraday&#8217;s Homopolar Motor:<\/strong><\/em><\/h5>\n<p>Research done by Zoe, Sowmya, and Bela<\/p>\n<ul>\n<li>Invented in 1821 (discovered right before\u00a0<strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">electromagnetism<\/strong>) \u2192 Michael Faraday<\/li>\n<li>First electrical motor to be built<\/li>\n<li>Also known as unipolar motors<\/li>\n<li>Simpler structure, higher rotor strength, and lower iron loss in rotations<\/li>\n<li>Direct current (DC) and Low voltage<\/li>\n<li>Used in modern day plating, turbines, and toys.\n<ul>\n<li>Plating: used in generators installed for electroplating process plants\n<ul>\n<li>Has evolved to have high enough voltage to operate heavy machinery despite low power outage<\/li>\n<\/ul>\n<\/li>\n<li>Turbines: used in high-<strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">torque<\/strong>\u00a0wind turbines\n<ul>\n<li>Provide low cost means of converting wind to electricity due to reduced need for multidirectional gears<\/li>\n<li>Require less maintenance than bipolar motors<\/li>\n<\/ul>\n<\/li>\n<li>Toys: small engines in toy cars are an example of the homopolar motor\n<ul>\n<li>Spinning wheel create force \u2192 magnet spins and creates electric field<\/li>\n<li>Electricity is flowing in one direction to power the car (the engine specifically)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>Can be inefficient due to counterflow of current, causing inefficiency of early homopolar motors<\/li>\n<li>Homopolar motor is driven by\u00a0<strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">Lorentz Force \u2192\u00a0<\/strong>this force provides a torque around the axis of rotation (parallel to magnetic field)<\/li>\n<li>Powers motor in one direction<\/li>\n<li>Useful for demonstrating scientific forces such as electromagnetism<\/li>\n<li>Otherwise kind of useless due to high electrical currents, poor efficiency, and inability to get much useful power out of it<\/li>\n<li>Magnet and compass (deviating the needle) \u2192 do the same with copper wire and AA battery \u2192 demonstrate electromagnetism<\/li>\n<\/ul>\n<p>\u201cThe magnet\u2019s magnetic field pushes up towards the battery and the current that flows from the battery travels perpendicularly from the magnetic field. This causes the creation of a force perpendicular to both the magnetic field and current. This force, known as the Lorentz force, is exerted on the copper wire (the conductor) causing it to spin\u201d (CSUB)<\/p>\n<p><u class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-3q c2-59 c2-5c\"><strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">Questions:<\/strong><\/u><\/p>\n<ol>\n<li>What&#8217;s the difference between a homopolar generator and a homopolar motor?<\/li>\n<li>Were homopolar motors the beginning of cars \u2192 possible relevance between modern cars and the motor?<\/li>\n<li>Can homopolar motors or even just remnants of it be found in everyday inventions? (pulleys \u2192 elevators)<\/li>\n<\/ol>\n<p><u class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-3q c2-59 c2-5c\"><strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">Vocabulary:<\/strong><\/u><\/p>\n<p><strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">Electromagnetism<\/strong>: the physical interaction among electric charges, magnetic moments, and the electromagnetic field<\/p>\n<p><strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">Torque<\/strong>: a twisting force that speaks to the engine&#8217;s rotational force and measures how much of that twisting force is available when an engine exerts itself<\/p>\n<p><strong class=\"x-el x-el-span c2-3l c2-3m c2-3 c2-58 c2-x c2-4e c2-59\">Lorentz Force<\/strong>: the force exerted on a charged particle q moving with velocity v through an electric field E and magnetic field B<\/p>\n<p>Formula : F = q( E + vB)<\/p>\n<p>F = force<\/p>\n<p>q = electric charge<\/p>\n<p>E = external electric field<\/p>\n<p>vB = velocity times magnetic field<\/p>\n<h5><em><strong>Do It Yourself (DIY) Homopolar Motor:<\/strong><\/em><\/h5>\n<p>By Vanisha Nagali<\/p>\n<p>*Use the link below for step by step instructions*<\/p>\n<p><a href=\"https:\/\/commons.princeton.edu\/josephhenry\/wp-content\/uploads\/sites\/71\/2023\/07\/HM-Instructions.pdf\">HM Instructions<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>faraday_motor.pdf Michael Faraday&#8217;s Homopolar Motor: Research done by Zoe, Sowmya, and Bela Invented in 1821 (discovered right before\u00a0electromagnetism) \u2192 Michael Faraday First electrical motor to be built Also known as unipolar motors Simpler structure, higher rotor strength, and lower iron loss in rotations Direct current (DC) and Low voltage Used in modern day plating, turbines, &hellip; <a href=\"https:\/\/commons.princeton.edu\/josephhenry\/faraday-motor\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Faraday Motor&#8221;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-3214","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/3214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/comments?post=3214"}],"version-history":[{"count":5,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/3214\/revisions"}],"predecessor-version":[{"id":4407,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/3214\/revisions\/4407"}],"wp:attachment":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/media?parent=3214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/categories?post=3214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/tags?post=3214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}