{"id":3621,"date":"2026-01-04T09:37:31","date_gmt":"2026-01-04T09:37:31","guid":{"rendered":"https:\/\/nbaem.com\/?p=3621"},"modified":"2026-01-04T02:15:53","modified_gmt":"2026-01-04T02:15:53","slug":"what-motor-magnets-used-in-permanent-magnet-motors","status":"publish","type":"post","link":"https:\/\/nbaem.com\/pt\/what-motor-magnets-used-in-permanent-magnet-motors\/","title":{"rendered":"What Motor Magnets Are Used in Permanent Magnet Motors Guide"},"content":{"rendered":"<p>Selecionando o adequado <strong>\u00edm\u00e3 permanente<\/strong> isn\u2019t just a design choice\u2014it\u2019s the deciding factor between a high-efficiency powerhouse and a motor that fails under pressure. Whether you are engineering <strong>motores de tra\u00e7\u00e3o de ve\u00edculos el\u00e9tricos<\/strong> or precision <strong>robotics<\/strong>, the magnetic material you choose dictates your <strong>torque density<\/strong>, thermal limits, and bottom line.<\/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 <strong>permanent magnet motors<\/strong>, there is no \u201cone size fits all.\u201d From the sheer strength of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Neodymium_magnet\" target=\"_blank\" rel=\"noopener\"><strong>Neod\u00edmio (NdFeB)<\/strong> <\/a>to the rugged thermal stability of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Samarium%E2%80%93cobalt_magnet\" target=\"_blank\" rel=\"noopener\"><strong>Cobalto de Sam\u00e1rio (SmCo)<\/strong><\/a>, each material offers a different competitive edge.<\/p>\n<p>Are you looking to maximize performance or minimize costs? I\u2019ve broken down the technical specifications and real-world applications of the industry\u2019s most critical <strong>motor magnets<\/strong> to help you make the right call.<\/p>\n<div id=\"attachment_2269\" style=\"width: 379px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-2269\" class=\"wp-image-2269\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/N52-neodymium-arc-shaped-motors-industrial-magnets.jpg\" alt=\"motor magnets\" width=\"369\" height=\"246\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/N52-neodymium-arc-shaped-motors-industrial-magnets-18x12.jpg 18w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/N52-neodymium-arc-shaped-motors-industrial-magnets-200x133.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/N52-neodymium-arc-shaped-motors-industrial-magnets.jpg 300w\" sizes=\"(max-width: 369px) 100vw, 369px\" \/><p id=\"caption-attachment-2269\" class=\"wp-caption-text\">motor magnets<\/p><\/div>\n<p>Vamos direto ao assunto.<\/p>\n<p>&nbsp;<\/p>\n<h2>The Best Magnet Types for Your Motor Project<\/h2>\n<p>Picking the right magnet isn\u2019t just a technical detail; it\u2019s the heartbeat of your motor\u2019s efficiency. I\u2019ve seen how the wrong choice can lead to demagnetization or unnecessary costs. Here are the four primary <strong>rare earth motor magnets<\/strong> and traditional materials I rely on to get the job done.<\/p>\n<h3>Neodymium Iron Boron (NdFeB) for Peak Performance<\/h3>\n<p>When I need maximum torque in a compact space, <a href=\"https:\/\/nbaem.com\/pt\/products\/neodymium-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong>\u00cdm\u00e3s permanentes NdFeB<\/strong><\/a> are my first choice. They offer the highest energy product of any material, making them the industry standard for <strong>EV traction motor magnets<\/strong>.<\/p>\n<ul>\n<li><strong>Maximum Power:<\/strong> Unmatched magnetic flux density.<\/li>\n<li><strong>Space Saving:<\/strong> High energy density allows for smaller, lighter motors.<\/li>\n<li><strong>Versatilidade:<\/strong> Available in various <strong>magnet grades for PM motors<\/strong> (from N to AH).<\/li>\n<li><strong>Constraint:<\/strong> Requires <strong>protective coatings<\/strong> to prevent corrosion.<\/li>\n<\/ul>\n<h3>Samarium Cobalt (SmCo) for Extreme Heat<\/h3>\n<p>For aerospace or high-performance industrial gear, heat is the enemy.<a href=\"https:\/\/nbaem.com\/pt\/products\/samarium-cobalt-magnets\/\" target=\"_blank\" rel=\"noopener\"> <strong>Samarium cobalt in PM motors<\/strong><\/a> shines because it maintains its magnetic field at temperatures where Neodymium would fail.<\/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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<li><strong>Resist\u00eancia \u00e0 Corros\u00e3o:<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<a href=\"https:\/\/nbaem.com\/pt\/products\/ceramic-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> <\/a>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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<li><strong>Coercividade Baixa:<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\n<hr \/>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Tipo de \u00cdm\u00e3<\/th>\n<th style=\"text-align: left;\">Produto de Energia (MGOe)<\/th>\n<th style=\"text-align: left;\">Temp. M\u00e1x. de Opera\u00e7\u00e3o<\/th>\n<th style=\"text-align: left;\">Resist\u00eancia \u00e0 Corros\u00e3o<\/th>\n<th style=\"text-align: left;\">Custo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>NdFeB sinterizado<\/strong><\/td>\n<td style=\"text-align: left;\">cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/td>\n<td style=\"text-align: left;\">cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/td>\n<td style=\"text-align: left;\">cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/td>\n<td style=\"text-align: left;\">Moderado<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>SmCo<\/strong><\/td>\n<td style=\"text-align: left;\">16\u201332<\/td>\n<td style=\"text-align: left;\">250\u00b0C \u2013 350\u00b0C<\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ferrita<\/strong><\/td>\n<td style=\"text-align: left;\">cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/td>\n<td style=\"text-align: left;\">250\u00b0C<\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Muito Baixo<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Alnico<\/strong><\/td>\n<td style=\"text-align: left;\">cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/td>\n<td style=\"text-align: left;\">450\u00b0C \u2013 540\u00b0C<\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Moderado<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>How I Choose the Right Magnet Used in Permanent Magnet Motors<\/h2>\n<p>When I select the <strong>magnet grades for PM motors<\/strong>, I look past raw power. I balance torque requirements against the environmental reality of the motor\u2019s housing. It is a game of trade-offs between <strong>magnetic strength vs. temperature resistance<\/strong>. While <strong>\u00cdm\u00e3s permanentes NdFeB<\/strong> offer the highest energy product, their performance can drop sharply if the <strong>Curie temperature motor magnets<\/strong> reach their limit. For heavy-duty industrial cycles, I often pivot to <a href=\"https:\/\/nbaem.com\/pt\/high-temperature-magnets\/\" target=\"_blank\" rel=\"noopener\">\u00edm\u00e3s de alta temperatura<\/a> that maintain stability under thermal stress.<\/p>\n<h3>Critical Selection Factors for Motor Efficiency<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Fator<\/th>\n<th style=\"text-align: left;\">Prioridade<\/th>\n<th style=\"text-align: left;\">Por que isso importa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Fluxo Magn\u00e9tico<\/strong><\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Directly dictates motor torque and power density.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Coercivity ($H_{cj}$)<\/strong><\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Prevents <strong>demagnetization in permanent magnets<\/strong> during peak loads.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Estabilidade T\u00e9rmica<\/strong><\/td>\n<td style=\"text-align: left;\">Medium\/High<\/td>\n<td style=\"text-align: left;\">Essential for preventing power loss as the motor heats up.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Resist\u00eancia \u00e0 Corros\u00e3o<\/strong><\/td>\n<td style=\"text-align: left;\">M\u00e9dio<\/td>\n<td style=\"text-align: left;\">Vital for <strong>neodymium magnets for motors<\/strong> to avoid oxidation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<ul>\n<li><strong>Managing Demagnetization Risks:<\/strong> I never ignore the \u201cknee\u201d of the demagnetization curve. If the motor draws too much current, the resulting counter-magnetic field can permanently weaken the rotor magnets. Choosing a high-coercivity grade is my insurance policy against this.<\/li>\n<li><strong>Corrosion Resistance and Protective Coatings:<\/strong> Since <strong>sintered vs bonded motor magnets<\/strong> have different porosities, I specify coatings like Nickel-Copper-Nickel or Zinc for NdFeB. This prevents the \u201cmagnet pest\u201d (oxidation) from destroying the rotor from the inside out.<\/li>\n<li><strong>Dimensional Precision for Rotor Assembly:<\/strong> I demand tight tolerances. Even a fraction of a millimeter of error can ruin the air gap flux. Precision is non-negotiable for a successful <a href=\"https:\/\/nbaem.com\/pt\/magnet-assembly\/\" target=\"_blank\" rel=\"noopener\">conjunto de \u00edm\u00e3<\/a> where the magnets must fit perfectly into the rotor slots for high-speed stability.<\/li>\n<li><strong>Balancing Cost and Performance:<\/strong> Not every project needs a Ferrari engine. For low-cost appliances, <strong>ferrite magnets electric motors<\/strong> are often the smartest choice because they provide adequate performance without the price volatility of rare earth elements.<\/li>\n<\/ul>\n<h2>Common Magnet Shapes and Configurations<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/01\/Permanent_Magnet_Motor_Magnet_Shapes_and_Placement.webp\" alt=\"Permanent Magnet Motor Magnet Shapes and Placement\" \/><\/p>\n<p>The physical shape of a magnet is just as important as its strength. When determining <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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\n<hr \/>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>EV traction motor magnets<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\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<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<p>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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>\u00edm\u00e3s de segmento de arco<\/strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <a href=\"https:\/\/nbaem.com\/pt\/ferrite-magnet-vs-neodymium\/\" 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> 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> help concentrate flux toward the center.<\/li>\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> (using multiple shapes) can eliminate the need for a heavy back-iron by directing all magnetic force to one side.<\/li>\n<\/ul>\n<h2>Where We Use These Permanent Magnets<\/h2>\n<p>I see these components as the heart of modern machinery. Choosing <strong>what magnet used in permanent magnet motors<\/strong> depends entirely on the environment, but the impact is always the same: higher efficiency and smaller footprints.<\/p>\n<h3>EVs and Renewable Energy Systems<\/h3>\n<p>The shift to green energy relies heavily on <strong>EV traction motor magnets<\/strong>. Most high-performance electric vehicles use <strong>\u00cdm\u00e3s permanentes NdFeB<\/strong> because they provide the massive torque and power density needed for long-range driving. As a leading neodymium magnet supplier, I ensure these materials meet the rigorous demands of both automotive drivetrains and wind turbine generators.<\/p>\n<h3>Automa\u00e7\u00e3o Industrial e Rob\u00f3tica<\/h3>\n<p>In the world of factory floors, precision is the priority. I use high-grade neodymium magnets in servo motors to ensure lightning-fast response times and exact positioning.<\/p>\n<ul>\n<li><strong>Robotic Arms:<\/strong> Require lightweight, high-flux magnets to reduce joint weight.<\/li>\n<li><strong>CNC Machinery:<\/strong> Relies on stable magnetic fields for consistent machining accuracy.<\/li>\n<li><strong>Conveyor Systems:<\/strong> Often utilize <strong>ferrite magnets electric motors<\/strong> when cost-efficiency is more critical than raw power.<\/li>\n<\/ul>\n<h3>High-Temp Aerospace and Medical Gear<\/h3>\n<p>In environments where failure isn\u2019t an option, <strong>Samarium cobalt in PM motors<\/strong> is the standard. I specify these for aerospace actuators and medical pumps because they maintain their strength in extreme heat. Unlike standard options, these <strong>rare earth motor magnets<\/strong> won\u2019t demagnetize when the temperature spikes during flight or high-intensity medical procedures.<\/p>\n<h3>Everyday Household Appliances<\/h3>\n<p>You\u2019ll find <strong>what magnet used in permanent magnet motors<\/strong> varies based on your budget and the appliance\u2019s goal.<\/p>\n<ul>\n<li><strong>Washing Machines:<\/strong> Uso <strong>\u00edm\u00e3s de ferrita<\/strong> for long-term durability and cost-effectiveness.<\/li>\n<li><strong>Cordless Vacuums:<\/strong> Depend on high-RPM motors powered by <strong>sintered vs bonded motor magnets<\/strong> to maximize suction in a handheld frame.<\/li>\n<li><strong>Air Conditioners:<\/strong> Use permanent magnet synchronous motors to achieve high energy-efficiency ratings.<\/li>\n<\/ul>\n<h2>Boosting Motor Performance Beyond the Magnet<\/h2>\n<p>Escolher o parceiro certo <strong>magnet used in permanent magnet motors<\/strong> is the foundation, but the surrounding architecture determines if you actually hit your efficiency targets. I focus on optimizing the entire magnetic circuit to ensure the hardware doesn\u2019t just run, but excels under load.<\/p>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>\u00cdm\u00e3s permanentes NdFeB<\/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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/p>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>EV traction motor magnets<\/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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong>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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <a href=\"https:\/\/nbaem.com\/pt\/magnets-used-in-renewable-energy\/\" target=\"_blank\" rel=\"noopener\">\u00edmas usados em energia renov\u00e1vel<\/a> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\n<\/ul>\n<h3>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/h3>\n<p>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>\u00edm\u00e3s de segmento de arco<\/strong> 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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits <strong>magnet grades for PM motors<\/strong> cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/li>\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> Using high-strength, temperature-resistant adhesives or mechanical sleeves to secure magnets against centrifugal forces, especially when using samarium cobalt magnets in high-heat environments.<\/li>\n<\/ul>\n<h2>Common Questions About What Magnet is Used in Permanent Magnet Motors<\/h2>\n<p>I get asked these questions constantly by engineers and hobbyists trying to figure out which <strong>rare earth motor magnets<\/strong> will actually hold up under pressure. Here is the lowdown on the most common concerns.<\/p>\n<h3>What\u2019s the Strongest Magnet for a PM Motor?<\/h3>\n<p>The undisputed king of strength is the <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> magnet. In terms of energy product ($BH_{max}$), nothing else comes close. These <strong>\u00cdm\u00e3s permanentes NdFeB<\/strong> allow me to design motors that are incredibly small but pack a massive punch. If your goal is maximum torque in a tight space, this is your go-to material.<\/p>\n<h3>Why Use NdFeB Instead of Ferrite in EVs?<\/h3>\n<p>It comes down to weight and efficiency. While <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> are dirt cheap, they have very low magnetic density. To get the same power as a small Neodymium rotor, a Ferrite version would be huge and heavy. For <strong>EV traction motor magnets<\/strong>, we need the high power-to-weight ratio that only high-grade neodymium magnets can provide to maximize battery range.<\/p>\n<h3>How Does Heat Affect My Magnets?<\/h3>\n<p>Heat is the primary enemy of magnetic flux. Every material has a <strong>Curie temperature for motor magnets<\/strong>, which is the point where they lose their magnetism permanently. Even before that, rising heat causes a temporary dip in performance. To prevent a total breakdown, I always monitor the <a href=\"https:\/\/nbaem.com\/pt\/magnetization-and-demagnetization-for-permanent-magnet\/\" target=\"_blank\" rel=\"noopener\">magnetiza\u00e7\u00e3o e desmagnetiza\u00e7\u00e3o<\/a> curves of the specific magnet grade to ensure the motor stays within its \u201csafe zone.\u201d<\/p>\n<hr \/>\n<h3>Quick Comparison: Rare-Earth vs. Alternatives<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Caracter\u00edstica<\/th>\n<th style=\"text-align: left;\">NdFeB (Neod\u00edmio)<\/th>\n<th style=\"text-align: left;\">SmCo (Sam\u00e1rio Cobalto)<\/th>\n<th style=\"text-align: left;\">Ferrite (Cer\u00e2mico)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>For\u00e7a Magn\u00e9tica<\/strong><\/td>\n<td style=\"text-align: left;\">Maior<\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Baixo<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Resist\u00eancia ao Calor<\/strong><\/td>\n<td style=\"text-align: left;\">Moderado<\/td>\n<td style=\"text-align: left;\">Excelente<\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Custo<\/strong><\/td>\n<td style=\"text-align: left;\">Alto<\/td>\n<td style=\"text-align: left;\">Muito Alto<\/td>\n<td style=\"text-align: left;\">Mais Baixa<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Uso Comum<\/strong><\/td>\n<td style=\"text-align: left;\">EVs, Robotics<\/td>\n<td style=\"text-align: left;\">Aeroespacial<\/td>\n<td style=\"text-align: left;\">Fans, Pumps<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Are There Rare-Earth Alternatives?<\/h3>\n<p>Yes, but there is always a trade-off. If you want to avoid <strong>rare earth motor magnets<\/strong>, you are looking at Ferrite or Alnico. These are great for cost-sensitive projects or very specific high-heat environments, but you will lose that compact \u201cpeak performance\u201d factor. High-performance <strong>cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https:\/\/developers.cloudflare.com\/workers\/wrangler\/configuration\/#limits<\/strong> almost always rely on rare earths to meet modern efficiency standards.<\/p>\n<h3>Ensuring Consistent Magnetic Flux<\/h3>\n<p>Consistency starts with the manufacturing process. I look for <strong>magnet grades for PM motors<\/strong> that have tight tolerances on their magnetic properties. Using precision-ground <strong>arc segment magnets for rotors<\/strong> and ensuring a high-quality protective coating prevents the \u201cflux drift\u201d that happens when magnets start to corrode or age unevenly.<\/p>\n<div id=\"references\" class=\"min-w-0 scroll-mt-8 overflow-hidden\">\n<div class=\"text-[16px]\"><\/div>\n<div class=\"flex flex-col gap-2 text-sm leading-relaxed\">\n<div class=\"break-words text-[1em] leading-7\"><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Discover what motor magnets are used in permanent magnet motors types comparison selection tips and key performance factors<\/p>","protected":false},"author":1,"featured_media":3574,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3621","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/12\/Permanent_Magnet_Motor_Magnet_Selection_Factors_8Z.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/posts\/3621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/comments?post=3621"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/posts\/3621\/revisions"}],"predecessor-version":[{"id":3623,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/posts\/3621\/revisions\/3623"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/media\/3574"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/media?parent=3621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/categories?post=3621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/pt\/wp-json\/wp\/v2\/tags?post=3621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}