According to Steerprop managing director Jussi Sepp\u00e4l\u00e4, market demand for more compact designs and greater efficiency has prompted the development of company\u2019s new CRP ECO LM model.<\/p>\n
Jussi Puranen of The Switch explained that in a conventional synchronous generator, the magnetic field is created by feeding current into the rotor winding, but the \u201cmassive field poles\u201d bring both losses and complexity into the system. By contrast, a much simpler and more efficient field is created by using permanent magnets around a hollow steel cylinder instead of a rotor, reducing components and losses as well as raising efficiency and giving instantaneous torque.<\/p>\n
There are also a number of design advantages: a PM unit can be between 30% and 50% smaller with a weight reduction of up to 40%, partly conferred by the hollow rotor design. This again lowers inertia, an important point if shaft line vibration is a consideration.<\/p>\n
Steerprop\u2019s CRP ECO LM is a mechanical, fully azimuthing propulsor with electric motor and a flexibly coupled shaftline. The system yields a number of benefits, according to Aarno Niemi, Steerprop\u2019s automation manager: not only is the simplicity likely to yield extremely low maintenance, but having a hollow \u2018donut\u2019 rotor has \u201callowed us to put the shaft line straight through the centre\u201d.<\/p>\n
Niemi added that everything is integrated into one package for easy installation \u2013 even if it\u2019s a late consideration. Further, he added that keeping the electric motor above the waterline means it can be reached easily.<\/p>\n
The price will be at a slight premium to Z-drive, induction motor units, Sepp\u00e4l\u00e4 confirmed.<\/p>\n
The new PM-model will initially be available in Steerprop\u2019s large CRP ECO units (5MW to more than 10MW), and for the smaller CRP units (0.8\u20131.2MW and 3MW).<\/p>\n
By Stevie Knight<\/p>\n","protected":false},"excerpt":{"rendered":"
Propulsion manufacturer Steerprop has worked with The Switch to develop permanent magnet (PM) technology for its range of large contra-rotating propulsors (CRP).<\/p>\n","protected":false},"author":8,"featured_media":4245,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15],"tags":[],"sponsor":[],"class_list":["post-4244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-propulsion"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts\/4244","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/comments?post=4244"}],"version-history":[{"count":1,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts\/4244\/revisions"}],"predecessor-version":[{"id":4246,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/posts\/4244\/revisions\/4246"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/media\/4245"}],"wp:attachment":[{"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/media?parent=4244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/categories?post=4244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/tags?post=4244"},{"taxonomy":"sponsor","embeddable":true,"href":"https:\/\/www.motorship.com\/propulsion-and-future-fuels-conference\/wp-json\/wp\/v2\/sponsor?post=4244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}