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A round permanent magnet is inserted into the bored hole and a handle is attached to allow rotation of the magnet. This act of rotation changes the orientation of the magnetic field. [4] In the off position, the poles are oriented towards the non-ferrous core. The iron blocks act as keepers by bridging between both poles.
The magnet induces an electric current as it spins around the red copper winding, seen on the lower right. The current from the copper winding flows through the filament of an incandescent light bulb (not shown), giving off light. An L-shaped spring returns the handle to its original position after each engagement.
Electropermanent magnets made with powerful rare-earth magnets are used as industrial lifting (tractive) magnets to lift heavy ferrous metal objects; when the object reaches its destination the magnet can be switched off, releasing the object. Programmable magnets are also being researched as a means of creating self-building structures. [2] [3]
The rotor (upper right) has been removed and turned upside-down. The gray ring inside its cup is a permanent magnet. This particular motor is an outrunner, with the stator inside the rotor. DC brushless ducted fan. The two coils on the printed circuit board interact with six round permanent magnets in the fan assembly.
The pole-to-pole distance is on the order of 5 mm, but varies with manufacturer. These magnets are lower in magnetic strength but can be very flexible, depending on the binder used. [37] For magnetic compounds (e.g. Nd 2 Fe 14 B) that are vulnerable to a grain boundary corrosion problem it gives additional protection. [36]
Magnepan has used several different technologies in constructing their magnetostatic speakers.All Magnepan speakers are based on flexible ferrite magnet strips (like refrigerator magnets), 0.060" (1.5 mm) thick, typically cut to either 1/4" (6 mm) wide (mid-bass) or 1/8" (3 mm) wide (tweeters) and more or less the length of the speaker.
Box for a WHEE-LO toy The Schylling "magnetic gyro toy" has a design that is very similar to the original WHEE-LO toy. WHEE-LO is a trademark for a handheld toy that propels a plastic wheel along both sides of a metal track with magnets built into the wheel. As the track is tilted up and down, the wheel rolls the length of the track, top and ...
Magnetic viewing film showing a flat refrigerator magnet's magnetization. Flat flexible (not hard ceramic ferrite) refrigerator magnets are created with a Halbach magnetization pattern for a stronger holding force when attached to a flat ferromagnetic surface (e.g. a
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