{"id":3410,"date":"2025-11-24T07:23:03","date_gmt":"2025-11-24T07:23:03","guid":{"rendered":"https:\/\/nbaem.com\/?p=3410"},"modified":"2025-11-25T03:49:48","modified_gmt":"2025-11-25T03:49:48","slug":"diametrically-magnetized-magnets-multipole-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/sr\/diametrically-magnetized-magnets-multipole-magnets\/","title":{"rendered":"Diametrically Magnetized Disc vs Multipole Ring Magnets Performance Guide"},"content":{"rendered":"<h2>Magnetization Patterns Explained<\/h2>\n<h3>Diametrically Magnetized Disc Magnets<\/h3>\n<ul>\n<li>Magnetized across the diameter with a clear North-South polarity.<\/li>\n<li>Magnetic field lines exit one semicircle and enter the opposite semicircle.<\/li>\n<li>Commonly made from high-performance materials like <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/sr\/products\/neodymium-magnet\/\" target=\"_blank\" rel=\"noopener\">NdFeB (Ndodijum gvo\u017e\u0111e bora)<\/a> <\/span><\/strong>i <a href=\"https:\/\/en.wikipedia.org\/wiki\/Samarium%E2%80%93cobalt_magnet\" target=\"_blank\" rel=\"noopener\"><strong><span style=\"color: #ff6600;\">SmCo (Samarijum-kobalt)<\/span><\/strong><\/a>.<\/li>\n<li>Typical grades range from N35 to N52 for NdFeB and 2J85 for SmCo.<\/li>\n<\/ul>\n<h3>Multipole Ring Magnets<\/h3>\n<ul>\n<li>Feature multiple alternating poles arranged evenly around the circumference\u2014usually 4, 6, 8, or more poles.<\/li>\n<li>Two main orientations: axial (poles aligned along the magnet\u2019s axis) and radial (poles pointing outward radially).<\/li>\n<li>Manufacturing methods include sintered magnets, offering high strength and precision, and bonded magnets, which provide complex shapes and flexibility.<\/li>\n<\/ul>\n<p>NBAEM specializes in delivering both diametric discs and precision multipole ring magnets tailored for your exact application needs.<\/p>\n<h2>Magnetic Field Performance Comparison<\/h2>\n<p><img decoding=\"async\" class=\"\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/11\/Diametrically_Magnetized_vs_Multipole_Ring_Magnets.webp\" alt=\"Diametrically Magnetized vs Multipole Ring Magnets\" width=\"748\" height=\"499\" \/><\/p>\n<p>Kada se upore\u0111uju <strong>diametrically magnetized disc magnets<\/strong> to <strong>multipole prstene magnete<\/strong>, the differences in magnetic field performance stand out clearly:<\/p>\n<table>\n<thead>\n<tr>\n<th>Osobina<\/th>\n<th>Diametric Disc Magnets<\/th>\n<th>Multipole Ring Magnets<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Field Uniformity<\/strong><\/td>\n<td>Moderate, with edge distortion<\/td>\n<td>High, with smooth sinusoidal flux<\/td>\n<\/tr>\n<tr>\n<td><strong>Pole Transition<\/strong><\/td>\n<td>Single sharp 180\u00b0 change<\/td>\n<td>Multiple smooth transitions (4, 6, 8+ poles)<\/td>\n<\/tr>\n<tr>\n<td><strong>Air-Gap Flux Density<\/strong><\/td>\n<td>0.4 \u2013 0.6 Tesla<\/td>\n<td>0.5 \u2013 0.8 Tesla (8-pole types)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Diametric discs produce a clear north-south field across the diameter, but edge effects can cause uneven flux distribution. On the other hand, multipole ring magnets offer superior <strong>radial field uniformity<\/strong>, thanks to their alternating pole layout around the ring. This design smooths out pole transitions, delivering better sinusoidal magnetic fields crucial for reducing torque ripple in applications like BLDC and spindle motors.<\/p>\n<p>Finite Element Analysis (FEA) simulations confirm that multipole rings provide stronger and smoother air-gap flux density, making them the preferred option for high-performance motor designs requiring consistent torque output.<\/p>\n<p>For detailed guidance on magnet performance and material grades like NdFeB, check out our comparison of <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/sr\/n52-vs-n35\/\">N52 vs. N35 magnet grades<\/a><\/span><\/strong>, which dives into how material choice affects field strength and stability.<\/p>\n<h2>Torque &amp; Cogging in Rotating Applications<\/h2>\n<p>&nbsp;<\/p>\n<p>When it comes to torque and cogging, diametrically magnetized discs tend to show higher cogging effects. This makes them a good choice for 2-pole stepper motors where precise positional holding is needed but torque ripple isn\u2019t a big issue. The sharp 180\u00b0 pole transition causes noticeable torque jumps as the rotor turns.<\/p>\n<p>On the other hand, multipole ring magnets\u2014with their multiple smooth pole transitions\u2014offer near-zero cogging torque. This makes them ideal for servo and spindle motors requiring smooth rotation and consistent torque output. Thanks to their sinusoidal flux density, torque ripple is minimized significantly.<\/p>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<p>cURL Too many subrequests by single Worker invocation. 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To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<span style=\"color: #ff6600;\"><strong> <a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/sr\/application-of-magnets-for-motor\/\" target=\"_blank\" rel=\"noopener\">cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/a>.<\/strong><\/span><\/p>\n<h2>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h2>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<p>&nbsp;<\/p>\n<h2>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h2>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<ul>\n<li><strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> cURL Too many subrequests by single Worker invocation. 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To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong>\u2014simple and effective for basic two-pole setups.<\/li>\n<li><strong>Looking for smooth, sinusoidal back-EMF (BEMF)?<\/strong> Multipole ring magnets are your best bet, offering higher radial field uniformity and reduced torque ripple.<\/li>\n<li><strong>Operating temperature above 120\u00b0C?<\/strong> Uzeti u obzir <strong>SmCo multipole magnets<\/strong> for better thermal stability and performance.<\/li>\n<\/ul>\n<p>For precision builds, especially with tight pole placement tolerances, you can <strong>contact our CTA team<\/strong> to get a detailed pole placement report within 24 hours.<\/p>\n<p>This checklist ensures you pick a magnet that fits your application\u2014whether it\u2019s for cost-effective EPS steering or high-performance spindle motors.<\/p>\n<p>For more on high-performance materials like SmCo, check out our detailed article on<strong><span style=\"color: #ff6600;\"> <a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/sr\/products\/samarium-cobalt-magnets\/\" target=\"_blank\" rel=\"noopener\">SmCo magneti<\/a>.<\/span><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Compare diametrically magnetized disc magnets and multipole ring magnets for torque, magnetization patterns, and precision in advanced motor applications.<\/p>","protected":false},"author":1,"featured_media":3406,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3410","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/11\/Diametrically_Magnetized_vs_Multipole_Ring_Magnets.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/posts\/3410","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/comments?post=3410"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/posts\/3410\/revisions"}],"predecessor-version":[{"id":3458,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/posts\/3410\/revisions\/3458"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/media\/3406"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/media?parent=3410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/categories?post=3410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/sr\/wp-json\/wp\/v2\/tags?post=3410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}