Tesla’s recent announcement that the Cybercab motors use no rare earth metals immediately raised an obvious question: did Tesla simply return to induction motors? That would not be surprising. Induction motors do not require permanent magnets and can therefore reduce dependence on imported rare earth permanent magnet supplies. Tesla itself has extensive experience with induction…
Halbach arrays are widely known for controlling how magnetic flux is distributed through a specific arrangement of magnetization directions. The same principle can also be extended to cylindrical structures that generate dipole, quadrupole, sextupole, octupole, and other multipole field distributions. These Halbach multipoles are distinguished by the spatial order of the magnetic field they generate,…
Strong magnetic fields and strong magnetic field gradients are not the same. Magnetic field strength describes the magnitude of a magnetic field at a given location, while magnetic field gradients describe how rapidly the field changes with position. This distinction becomes important when magnetic fields are used to generate forces or create position-dependent magnetic behavior.…
How 3D Printed Magnets Emerged? 3D printed magnets are permanent magnets or magnetic components produced by additive manufacturing, most commonly by printing polymer-bonded magnetic compounds layer by layer into the required geometry. Interest in this approach grew rapidly in the mid-2010s, when additive manufacturing was expanding beyond plastic prototypes into functional materials and industrial manufacturing.…
Temperature Effects on Neodymium Magnets: Changes in Magnetic Performance As temperature rises, two related but different changes occur in the magnetic performance of Neodymium (NdFeB) magnets. The remanence Br decreases, reducing the magnetic flux or field that the magnets can provide. At the same time, the intrinsic coercivity Hcj also decreases, typically much more rapidly, which…
Voice coil motors (VCMs), also known as voice coil actuators, are electromagnetic actuators used for precise linear or limited-angle motion. They generate force through the interaction between current-carrying coils and permanent magnetic fields, providing fast response, smooth motion, and accurate force control for positioning, vibration, and other motion applications. Magnetic assemblies in VCMs typically combine…
What Are Magnetic Blocks and Magnetic Tiles? Magnetic blocks, also called magnet blocks or magnetic building blocks, are construction toys that use permanent magnets to connect individual pieces. They come in different forms, including block-like pieces and the flat geometric pieces commonly sold as magnet tiles or magnetic tiles. Unlike conventional interlocking blocks, they rely…
What Is Magnetic Frag Rack? Magnetic frag racks are removable aquarium racks designed to hold coral frags or frag plugs against the inside wall of a reef aquarium. Instead of relying on suction cups, hooks, or permanently fixed supports, these racks use magnetic attraction through the aquarium glass, allowing their position to be adjusted without…
What Is Magnetic Golf Towel? Magnetic golf towel is a golf towel equipped with magnets or magnetic attachments that make it easier to keep the towel accessible and quickly remove it during play. Golf towels are commonly used to wipe moisture, grass, mud, and other debris from golf club faces and grooves, as well as…
What Is Magnetic Dryer Vent? Magnetic dryer vents are detachable vent connections that use permanent magnets to join clothes dryer exhaust outlets to wall-side ducts. Instead of requiring access behind dryers to tighten conventional clamps, the mating sections connect when brought close enough for magnetic attraction to pull the interfaces together. Magnetic dryer vent connectors…