Magnetics Business & Technology Magazine and Conference

A Producer's and Buyer's Perspective - The Permanent Magnet Outlook
This presentation will predict the major shifts that can be expected in the permanent magnet marketplace over the coming decade. Future market growth and size will be forecasted. Major technologies and applications that will influence future market demand will be identified. Raw material supply and prices will be predicted and theanticipated role of China will be discussed. Future structural changes in the North American magnet industry landscape will be summarized with specific projections of who the major North American "industry survivors" will be.

Permanent Magnetic Material Consumption May Be Teetering on the Brink
In 2007, the Global Permanent Magnet Market may have reached 800,000 metric tons and $8.95 billion and is predicted to reach 925,000 metric tons and $11 billion in 2010. Prices can fluctuate based on raw materials, supply, demand and the global economy. Tonnage is a consistent measure. We will look at those factors that can affect the tonnage of Permanent Magnetic materials sold globally. We will examine the effects of population, per capita consumption in developed and developing portions of the world, and applications. The net effect of increases in population, increases in per capita consumption and more new applications than declining applications results in growth.

Magnetic Moment and Susceptibility Calibration Standards
In the past there were available a number of NBS magnetic moment and susceptibility standards for calibrating magnetometers. However, the supply of all those standards was exhausted in 1989. NIST assembled a new precision absolute magnetometer five years ago, and recently finished using it to certify a new series of magnetic standards, including the popular Ni sphere SRM#772a. Here, the measurement technique will be described, along with information on the metallurgy and use of the new standards.

R.D. Shull, Leader, Metallurgy Division, National Institute of Standards and Technology

Magnetic Materials - The Classics
Metallurgical innovations along, with ever-expanding insights into the molecular dynamics of magnet materials, led to the discovery and development of real permanent magnet materials in the early to mid twentieth century. The physical and magnetic properties of some of these materials enable them to maintain their position of being irreplaceable as superior resources for energy storage and energy conversion in many applications. Learn three of these classic permanent magnet materials; alnico, ferrite and Samarium Cobalt. Brief histories, attributes and applications will also be presented.

A New Generation of Hall Magnetometers: Enabling Technologies
A new generation of Hall magnetometers simplifies the measurement and mapping of magnetic fields in an industrial environment: simultaneous measurement of three axes provides total field; integration of the three axes on a single chip provides a very compact sensor and point-like active volume; four ranges measure fields of up to 20 T; spinning-current techniques minimize offset and offset drift; integrated compensation provides reliable measurements over a wide temperature range; high-speed acquisition permits measurement of AC fields; compact construction enables portable and multi-probe applications; and standardized USB interface permits easy system integration.

Advances in Samarium Cobalt Magnet Technology And US Defense Contractual Considerations
Discover the most recent advances in samarium cobalt magnet technology and its applications. New advances in temperature compensated samarium cobalt magnet materials and developments in higher performance samarium cobalt grades will be discussed. We will review the final results of the design, fabrication and testing of a 538°C permanent magnet bearing powered by a PM motor operating at these same temperatures with its associated unique test apparatus built under a three year NASA program.

High Performance, Radially Oriented Nd-Fe-B Ring Magnets
This presentation will illustrate the unique characteristics of NEOQUENCH-DR, hot formed radially oriented Nd-Fe-B magnets. The production process utilizes thermo-mechanical alignment during hot extrusion where mechanical deformation at an elevated temperature induces a crystallographic alignment and thus radial magnetic alignment of submicron size Nd2Fe14B grains, which is quite different from conventional sintered magnets where magnetic field alignment is used. This unique alignment process allows us to go beyond the limitation of field alignment; smaller diameter and large length to diameter ratio magnets can be produced with high uniformity.

High Magnetic Fields Enabled by 2G High Temperature Superconductors
Recent developments in 2G HTS coil technology are presented highlighting the ability of 2G HTS wire to be used to generate ultra high magnetic fields while functioning under difficult high stress operating conditions. The challenges of using 2G HTS wire in various coil constructions and applications are discussed. The ability of the conductor to operate under high stress levels has been demonstrated in both direct sample measurement and test coils. The high winding current density that is available with SuperPower's thin 2G HTS wire was utilized in a high field insert coil demonstration generating central fields in excess of 26.8 T. This first test and later progress in moving to higher fields will be presented.

Recent Advances in Multi-physics Modelling of Materials for Applications in Electromagnetic Design
Discover the use of multiple independent variable tabular representation of material properties and boundary conditions for multi-physics electromagnetic design simulations using finite element methods. Properties in one of the physical domains depend on the solution of another coupled domain. The presentation shows the flexibility of this approach by focusing on three specialist applications: superconducting coils during "quench"; charging of semi-conducting dielectric materials by charged particle beams; degradation of operational permanent magnet performance due to temperature rise. Practical applications in electromechanics, X-ray tubes and superconducting magnets illustrate the presentation.

Non Contact Inspection Applications of Magnetoresistive Sensors
Recent advancement of Giant Magneto-Resistive (GMR) sensor technology has many applications in instrumentation and equipment development. AMR (Anisotropic Magnetoresistance), GMR, TMR (Tunneling MR) and MTJ (Magnetic Tunneling Junction) sensors have opened up a wide range of applications pertinent to the measurement of small magnetic fields. While the main thrust of GMR technology lies in the Disk Drive Recording industry, the technology has widespread use in a wide array of devices ranging from Current Switching Devices to MEMS sensors used in automotives, space, compass and guidance applications. Currently there is great interest in the measurement and mapping of small magnetic fields in many areas of Science, Engineering, and Medicine. This presentation will focus on the non-contact and non- destructive applications as related to the Electronics Industry and Non-Destructive Testing.

Low Q Very Wide Band High Frequency EMI Filters
Learn how and why these EMI filters work. Even though it appears to be a conventional inductor, it really isn't. Applications and design methods will be discussed. Samples of this product will be handed out along with data sheets and application notes. Subjects that will be covered in detail include: decoupling capacitor and how to calculate it (the original way); capacitors in parallel; the disadvantage of this capacitor method; how a very low Q wide band inductor comes to the rescue; what allows the low Q filter inductor to work; applications of this part; and where can it be used (ASICs, SMPs, PLCs, RF, and more).

Magnetizing in Production Lines
"Magnetizing in production lines" gives a short guideline for placing magnetizing equipment in industrial production lines. Following a short introduction to magnetization a comparison is made between the implementation of already magnetized magnets and the magnetization after the system is assembled. In both cases advantages and disadvantages of the magnetization result as well as the handling process are discussed.

André Beumer, Graduate Physicist and Hartmut Pagel, Graduate Physicist,
MAGSYS magnet systems

Winding Losses In High Frequency Inductors with Gapped Core Structures
High frequency inductors often exhibit significant losses due to skin effects. Conventional wisdom has held that litz wire should be employed to moderate skin effects, and that the available winding area should be filled with copper to the greatest extent possible. This conventional wisdom breaks down in the case of gapped core structures. A greater winding fill factor does not always lead to lower winding losses. In many cases the lowest loss design is achieved by selectively winding in certain areas of the bobbin window, leaving other areas devoid of copper. This presentation will examine the source of winding losses in high frequency power inductors and introduce a new computer program.

Application of Magnets in the Head Actuators for LTO Tape Drives
Among the most recent and rapidly growing formats of data storage is Linear Tape Open (LTO) technology. The LTO Ultrium format storage solution is a single-reel, high-performance tape cartridge suitable for backing up, restoring, and archiving applications. This presentation will discuss: modern Neodymium magnets as used by head actuators during the read-write process and more specfically within compact designs and magnet/hall sensor technology used by the head acutator to improve the closed-loop servo functions within a LTO Drive. In connection with these topics, bonded magnet technology as it relates to the above referenced magnet/hall sensor technology, as well as, the employment of dual pole magnetization as used within the extremely compact design of the Head actuator will also be discussed.

Magnetization of Isotropic Magnet Materials: Considerations for Motor Design
Isotropic magnets assume the orientation that is imparted to them in the magnetizing fixture. This makes fixture design a necessary integral part of the motor design process, and can be exploited as an advantage when designing with isotropic materials. For motors and generators magnetization can be tuned to reduce the cogging torque and torque ripple when design of the magnetizing fixture is carried out concurrently with the motor design. A PMDC motor case study will be part of the discussion, and the study demonstrates how the fixture design can be used to improve the motor performance.

David Miller, Director of Research & Development, Magnequench International, Inc.

Improving Airplane Power Quality through the Implementation of Multiphase Transformers
The need for electrical power on aircraft has dramatically increased in recent years. The nonlinear nature of loads contributes to an unacceptable level of current distortion. Multiphase transformers can significantly reduce current distortion in power conversion and rectification equipment, allowing distortion limits to be met. In aerospace applications where the AC system frequency is 400 Hz or higher, multiphase transformers offer very attractive, low weight and low cost solutions. Practical multiphase transformer approaches are reviewed with the advantages and disadvantages of each solution. The effects of transformer design parameters on performance results are quantified. Test data from selected demonstration hardware is shared.

Kaz Furmanczyk, Principal Engineer, Crane Aerospace & Electronics

The Implications of DFARS and Sourcing Magnets from China
The DFARS Specialty Metals Clause has important implications for magnetic components. This presentation will explore the origin, history and recent changes in the law, and how they impact the sourcing of magnetic components in US weapons systems. Recent US Commerce findings regarding Chinese subsidies for magnetic products, and the potential implications of this finding will also be discussed.

Video

Ed Richardson, Sales & Marketing Manager, Thomas & Skinner, Inc.
Peter C. Dent, Director of Business Development, Electron Energy Corp.