{"id":270,"date":"2022-07-18T08:00:19","date_gmt":"2022-07-18T08:00:19","guid":{"rendered":"https:\/\/www.magnetexpert.com\/blog\/?p=270"},"modified":"2025-01-08T10:25:36","modified_gmt":"2025-01-08T10:25:36","slug":"common-applications-of-neodymium-magnets","status":"publish","type":"post","link":"https:\/\/www.magnetexpert.com\/blog\/common-applications-of-neodymium-magnets\/","title":{"rendered":"The Most Common Applications Of Neodymium Magnets"},"content":{"rendered":"\n

Neodymium magnets are the strongest magnets commercially available\nand due to their strength, even tiny neodymium magnets are effective, making\nthem incredibly versatile. Since the creation of the first neodymium magnet,\nthey have been used for many purposes. <\/strong><\/p>\n\n\n\n

Industries such as electrical motor manufacture, medical science,\nrenewable energy, and technology all rely on super-strength neodymium magnets.\nWithout neodymium magnets, many advancements over the last 30 years would not\nhave been possible.<\/p>\n\n\n\n

Because of their super-strength, incredible performance, and resistance to demagnetisation alongside the fact that neodymium magnets come in all shapes and sizes, their uses are endless. <\/p>\n\n\n\n

Common Uses of Neodymium Magnets:<\/strong><\/h2>\n\n\n\n

Hard Disk Drives<\/strong><\/h3>\n\n\n\n

A hard disk drive records data by magnetising and\ndemagnetising a thin film of ferromagnetic material on a disk. Each disk is\nseparated into many tracks and sectors and each sector has many tiny individual\nmagnetic cells which are magnetised by thdrivees read\/write head when data is\nwritten to the drive. <\/p>\n\n\n\n

Hard drive heads are made from ceramic wrapped in a fine\nwire coil. When writing, the coil is energised, a strong magnetic field fors,\nand the recording surface adjacent to the gap is magnetised. <\/p>\n\n\n\n

Strong magnets are also used in the actuator that moves the\nread\/write head into position.<\/p>\n\n\n\n

Audio Equipment such as microphones, acoustic pick-ups, headphones and loudspeakers<\/strong><\/h3>\n\n\n\n

Permanent magnets are used in speakers alongside a\ncurrent-carrying coil which converts electricity into mechanical energy that\nmoves the speaker cone that in turn changes the pressure of the surrounding air\ncreating sound. <\/p>\n\n\n\n

Microphones work in reverse; a diaphragm is attached to a\ncoil of wire which sits within a permanent magnet, when sound moves the diaphragm,\nthe coil moves too. As the coil moves through the magnetic field created by the\npermanent magnet an electrical signal is produced which is characteristic of\nthe original sound.<\/p>\n\n\n\n

Reed Switches<\/strong><\/h3>\n\n\n\n

A reed switch is a switch operated by a magnetic field. Reed\nswitches consist of contacts placed on ferrous reeds, encased in a sealed glass\ntube. They can be designed to be open or closed by default in the absence of a\nmagnetic field and are activated by bringing a neodymium magnet close to the switch.\n<\/p>\n\n\n\n

A typical use for reed switches is detecting the opening and closing of doors in burglary alarm systems.<\/p>\n\n\n\n

Magnetic Separators<\/strong><\/h3>\n\n\n\n

Most processing facilities will use some form of magnetic\nseparation system to remove contaminating ferrous and paramagnetic items from\nproduction or processing lines. This is usually done using a form of conveyor\nsystem and strong filter rod magnets.<\/p>\n\n\n\n

Lifting Machinery<\/strong><\/h3>\n\n\n\n

Permanent magnets are essential in the heavy engineering and\nmanufacturing industries, used for lifting large ferrous items. Switchable\nrelease magnets using super-strong neodymium magnets are commonly used as they\nare supplied with a quick-release switching mechanism.<\/p>\n\n\n\n

ABS (anti-lock braking) System Sensors<\/strong><\/h3>\n\n\n\n

Passive ABS sensors use neodymium magnets wrapped inside\ncopper coils. A sensor is placed close to the ABS reluctor ring and as the ring\nrotates a voltage is induced in the copper wire. This signal is monitored by\nthe vehicle\u2019s computer system and used to define wheel speed.<\/p>\n\n\n\n

Point of Sale Displays<\/strong> <\/h3>\n\n\n\n

Every time you enter a shop or restaurant you might not realise that you are surrounded by neodymium magnets but they will be there. That\u2019s because many point of sale display advertising signs and stands use small are held together using small but strong neodymium magnets or are suspended from steel ceilings using neodymium hook magnets. <\/p>\n\n\n\n

MRI Scanners<\/strong><\/h3>\n\n\n\n

MRI scanners produce a large magnetic field that aligns the\nprotons in a human body in the direction of the magnetic field. Radiofrequency\nwaves are then directed at the body producing detailed internal images. Many\n\u2018open\u2019 MRI machines used in hospitals use large neodymium magnets, they\nliterally help save lives.<\/p>\n\n\n\n

Motors & Generators<\/strong><\/h3>\n\n\n\n

Electric motors rely upon a combination of an electromagnet\nand a permanent magnet, usually a neodymium magnet to convert electric energy\ninto mechanical energy. A generator is reverse, it converts mechanical energy\ninto electric energy by moving a conductor through a magnetic field.<\/p>\n\n\n\n

Magnetically Coupled Pumps<\/strong><\/h3>\n\n\n\n

Magnetically coupled pumps consist of a motor-driven shaft\nwith an attached ring of powerful magnets and another smaller ring of magnets\nattached to another shaft connected to the impeller that sits within the larger\nring of magnets. <\/p>\n\n\n\n

As the motor turns the drive shaft and one set of magnets,\nthe magnetic field generated turns the other set of magnets which powers the\nimpeller. With this type of motor, there is no mechanical contact between the\nmotor and the impeller.<\/p>\n\n\n\n

Magnetically coupled pumps or magnetic impeller pumps\nprovide two main advantages over non-magnetic pumps, due to the impeller is\nconnected to the driving magnets and shaft by magnetism alone, if the impeller\nis obstructed and stops turning the motor can continue to turn without burning\nout avoiding any lasting detriment to the motor. <\/p>\n\n\n\n

The second is relevant to applications in which liquid could\npotentially seep into the motor unit (for example, a pond motor) as with a\nmagnetically coupled motor you can completely separate the motor unit from the\nimpeller, which is usually within a hermetically sealed case.<\/p>\n\n\n\n

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Neodymium magnets are the strongest magnets commercially available and due to their strength and multiple sizes, neodymium magnets are incredibly versatile.<\/p>\n","protected":false},"author":3,"featured_media":785,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[154,99,155,57],"class_list":["post-270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","tag-common-applications-of-neodymium-magnets","tag-neodymium","tag-neodymium-magnet-applications","tag-neodymium-magnets"],"_links":{"self":[{"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/posts\/270","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/comments?post=270"}],"version-history":[{"count":1,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/posts\/270\/revisions"}],"predecessor-version":[{"id":966,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/posts\/270\/revisions\/966"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/media\/785"}],"wp:attachment":[{"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/media?parent=270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/categories?post=270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.magnetexpert.com\/blog\/wp-json\/wp\/v2\/tags?post=270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}