{"id":397,"date":"2020-08-14T14:29:29","date_gmt":"2020-08-14T21:29:29","guid":{"rendered":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/?page_id=397"},"modified":"2020-08-14T14:31:56","modified_gmt":"2020-08-14T21:31:56","slug":"mr-brake-with-magnets","status":"publish","type":"page","link":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/mr-brake-with-magnets\/","title":{"rendered":"MR-brake with magnets"},"content":{"rendered":"<br \/>\n<section id=\"builder-section-1459548946658\" class=\"row single gutter pad-top\">\n<div style=\"\" class=\"column one \">\n<header>\n<h2>MR-brake with permanent magnets<\/h2>\n<\/header>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM.png\" alt=\"\" width=\"230\" height=\"212\" class=\"alignleft size-full wp-image-399\" srcset=\"https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM.png 564w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM-396x364.png 396w\" sizes=\"(max-width: 230px) 100vw, 230px\" \/> A new magneto-rheological brake that uses only permanent magnets to produce variable torque output. A magnet array was developed that can be operated by a tiny motor allowing the device to apply 1.8 Nm torque using only 1.4 W of electrical power.<\/p>\n<p>The new MR-brake does not use any coils. It only requires power when changing the torque output.  It can operate for 22 hours using a small battery while cycling through full on\/off torque output. It can also apply full torque output indefinitely with no power input required to keep it on. There is no joule heating since there are no coils in the design.<\/p>\n<p>&nbsp;<\/p>\n<p>The device\u00a0uses an array of eight permanent magnets (item #6 below), which are rotated by the small motor to create variable flux inside the brake.<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex-792x478.png\" alt=\"\" width=\"600\" height=\"362\" class=\"alignnone size-large wp-image-400\" srcset=\"https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex-792x478.png 792w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex-396x239.png 396w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex-768x463.png 768w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex-990x597.png 990w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex-1188x716.png 1188w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM_ex.png 1403w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><em><strong>Publications<\/strong><\/em><\/p>\n<ul>\n<li>\u201cMagneto-rheological actuator with permanent magnets for low-power activation,\u201d Journal of Intelligent Material Systems and Structures, Vol. 31 Issue 6, pp. 801-817, September 2020.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/p><\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p> <\/p>\n<h2>MR-brake with permanent magnets<\/h2>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM.png\" alt=\"\" width=\"230\" height=\"212\" class=\"alignleft size-full wp-image-399\" srcset=\"https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM.png 564w, https:\/\/wpcdn.web.wsu.edu\/wp-vancouverlabs\/uploads\/sites\/1185\/2020\/08\/MRB-with-PM-396x364.png 396w\" sizes=\"(max-width: 230px) 100vw, 230px\" \/> A new magneto-rheological brake that uses only permanent magnets to produce variable torque output. A magnet array was developed that can be operated by a tiny motor allowing the device to apply 1.8 Nm torque using only 1.4 W of electrical power.<\/p>\n<p>The new MR-brake does not use any coils. It only requires power when changing the torque output. It can operate for 22 hours using a small battery while cycling through full on\/off torque output. It can also &#8230; <a href=\"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/mr-brake-with-magnets\/\" class=\"more-link\"><span class=\"more-default\">&raquo; More &#8230;<\/span><\/a><\/p>\n","protected":false},"author":2136,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-builder.php","meta":{"_wsuwp_accessibility_report":[]},"wsuwp_university_location":[],"wsuwp_university_org":[],"_links":{"self":[{"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/pages\/397"}],"collection":[{"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/users\/2136"}],"replies":[{"embeddable":true,"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/comments?post=397"}],"version-history":[{"count":22,"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/pages\/397\/revisions"}],"predecessor-version":[{"id":422,"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/pages\/397\/revisions\/422"}],"wp:attachment":[{"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/media?parent=397"}],"wp:term":[{"taxonomy":"wsuwp_university_location","embeddable":true,"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/wsuwp_university_location?post=397"},{"taxonomy":"wsuwp_university_org","embeddable":true,"href":"https:\/\/vancouver.labs.wsu.edu\/robotics-and-automation\/wp-json\/wp\/v2\/wsuwp_university_org?post=397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}