Micro systems technology:
To convert Kinetic energy into electricity one needs more than just a micro-generator. The kinetic energy has to be converted into rotational energy driving the micro-generator. The generator has to be accelerated by means of a gearbox or a spring and the energy has to...
The article How Electric Motors Work explains how brushed motors work. In a typical DC motor, there are permanent magnets on the outside and a spinning armature on the inside. The permanent magnets are stationary, so they are called the stator. The armature rotates, so it is called the...
When building models, be they planes or boats or robots, the ubiquitous motor of choice is the brushless motor. The reason for this is power and longer run times. A motor with brushes has current running through them into the center of the motor. After a time, friction can cause wear, resulting in...
Types
There are four main types of stepper motors:Permanent magnet stepper (can be subdivided into 'tin-can' and 'hybrid', tin-can being a cheaper product, and hybrid with higher quality bearings, smaller step angle, higher power density)Hybrid synchronous stepperVariable reluctance stepperLavet...
Wind energy, being one of the most important renewable energy sources, and wind turbines, which are necessary for producing wind energy, are very important in today's environmentally aware world. Below we outline detailed information about generators, with many power options right up to 7 MW, as...
How do they work?
The drawing that shows a curved "arcuate" armature magnet in three successive positions over a line of fixed stator magnets provides at least highly simplified insights into the theory of permanent magnet motive power generation. Johnson says curved magnets with sharp leading and...
Engineers today are tasked with applying myriad motor technologies because most rotary motion is ultimately powered by electric motors. One proliferating option,
ac (PMAC) motors, has functionalities that partially overlap with those of both ac induction and servomotors for larger,...
The trapezoidal permanent magnet synchronous motor (also known as brushless DC motors)
IntroductionTrapezoidal wave (square wave) magnetic field of permanent magnet synchronous motor rotor makes the spatial distribution of the stator on the rotor rotates counter-electromotive force generated for...
Neodymium Rings - NdFeB Ring Magnets
NdFeB rings are sometimes also known as discs with central holes.
The NdFeB Rings exits in two styles – 'pure' rings and 'countersunk' rings. The holes are centrally located.
The countersunk ring allows for the magnet to be screwed onto another item...
NdFeB discs are used in a huge variety of applications, from use in Hall Effect Sensors and Reed Switches, through to clamping applications, office use, generator use, educational, etc.
The magnets are supplied in stock sizes varying from 1mm to 40mm in diameter and 0.4mm to 10mm in height. The...
According to their materials, rare earth magnets can be classified into two basal types: Neodymium Iron Boron abate angel magnets and Samarium Cobalt abate angel magnets.
Neodymium magnets - Energy online writing go up to 55 MGOe, can achieve absolute top fields; however, about needs to be...
Selecting a grade is the next step, once you have decided which permanent magnet material is best for your application. Generally, a grade indicates the Maximum Energy Product of a magnet. For instance, Grade 32 implies the (BH)max is about 32 MGOe.
A higher grade of permanent magnet has a better...
China NDFEB magnets manufacturer XINFENG MAGNET specializes in manufacturing permanent magnets according to customers' specifications. In order for us to supply you the right product at a good price, we need you to provide us with as much information as possible about your magnet (See our...
Rare-Earths metals are a group of seventeen elements in the periodic table that consist of the 15 lanthanides and Scandium and Yttrium.
Currently China is producing 97% of the rare-earth used globally.
This puts significant pressure for the world to find an alternate source, especially since...
Rare Earth magnets fall within two basic types of materials
Samarium Cobalt (SmCo) - Energy products go up to 32 MGOe, can typically be used in high temperature (350°C) environments, and typically have a small thermal coefficient of Br (approximately 0.03%/degree).
Neodymium Iron...
Injection Molded Neodymium Iron Boron (NdFeB) magnets are manufactured by an injection process of pre-mixed magnetic powder with thermoplastic binders e.g. Nylon 6 or 12 or Polyphenylene Sulfide (PPS) which produces an accurate and homogeneous magnetic part. Through this process various shapes of...
3D Laser scanning is becoming increasingly popular as a fast method for gathering 3D digital data for any given object. Placing small reflectors onto any object and then scanning It using a 3D laser can allow you to build a complete digital 3D model of that Object.
David, from CADMAN recently...
As a crane lowered a powerful 3.8-ton magnet through the roof of the Laboratories for Molecular Medicine at 70 Ship St. today, Brown began work on deploying a powerful new tool for molecular biology research.
PROVIDENCE, R.I. [Brown University] - The magnetic field strength is what really...
Health Canada is planning to follow the lead of the United States and ban the sale of small, powerful magnets which can cause serious internal problems if swallowed by children.
Last summer, the American Consumer Product Safety Commission banned the sale of Buckyballs, powerful little "rare earth"...
Learning about magnets is great fun. Magnets are used every day all over the world. Supramagnets try to find fun magnet facts for kids and enjoy learning some truly magnetic information about the world of magnetism.Let’s find out what a magnet is, how magnetic fields work, which metals are...
Neodymium magnets (Nd-Fe-B) are composed of neodymium, iron, boron and a few transition metals, also known as NdFeB, NIB, or Neo magnet), the most widely used type of rare-earth magnet. Developed in 1982 by General Motors and Sumitomo Special Metals, neodymium magnets are the strongest type of...
XFMAG' alnico channel magnets are made of cast Alnico 5 material. All dimensions approximate and as cast with pole faces ground smooth. Other sizes are available upon request.
Channel Magnets
Alnico channel magnets can be used for various holding applications and also for removal of tramp...
Alnico may be the most popular, but ceramic magnets for pickups are also an option to consider. As mentioned earlier, it has a harsher edge than alnico. The two have a noticeably different sound, albeit both very good. And ceramic magnets are less expensive, making them attractive to use in...
Alnico magnets come in three main grades: 2, 3, and 5:
Alnico 2 traces back to the days of the 1950 Telecasters. This class seems to work well for middle-position pickups. It is known by its sweet, vintage tone, and there seem to be little disadvantages to using it.
Alnico 3 is the weakest of...
The first reported application of naturally occurring permanent magnet material is in the Chinese chronicles. It has been reported 2 that the best prepared caravans that crossed the Gobi desert, from the minarets of the kingdoms of the Kushans to the imperial pagodas on the banks of the Yangtze,...
Our company (XingFeng Magnet) will be exhibiting at CWIEME Berlin 2013 !
Exhibition Date: 4 - 6 June, 2013
Hall No.: 2.2
Booth No.: 2024
Service No.:+86-574-88469138
Exhibition Venue : Messe Berlin, Messedamm 22, D-14055 Berlin, Germany
Welcome new and old...
Neodymium magnets are a type of permanent magnets also known as rare earth magnets, due to the fact that they contain one or more of the rare earth elements of the periodic table. Most are made of a metal alloy containing neodymium, iron, and boron. They are much stronger than most of the magnets...
Traditional NdFeB magnets are widely used because of their excellent magnetic performance, however, their poor corrosion resistance make it cannot be used without coating.
As many files need the NdFeB magnet used without coating or only phosphate surface treatment, the magnet should be with high...
Consumer Affairs Minister Simon Bridges has announced a ban on the sale of sets of small high powered magnets that have caused serious injuries in New Zealand and at least one reported death in Australia.
The magnets are sold in New Zealand under a variety of brands in stores and over the...
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