eNewsletter

May 2010

NIST Develops 'Dimmer Switch' for Superconducting Quantum Computing
Scientists at the National Institute of Standards and Technology (NIST) have developed the first "dimmer switch" for a superconducting circuit linking a quantum bit (qubit) and a quantum bus—promising technologies for storing and transporting information in future quantum computers. The NIST switch is a new type of control device that can tune interactions between these components and potentially could speed up the development of a practical quantum computer.

Quantum computers, if they can be built, would use the curious rules of quantum mechanics to solve certain problems that are now intractable, such as breaking today’s most widely used data encryption codes, or running simulations of quantum systems that could unlock the secrets of high-temperature superconductors. Unlike many competing systems that store and transport information using the quantum properties of individual atoms, superconducting qubits use a "super flow" of oscillating electrical current to store information in the form of microwave energy. Superconducting quantum devices are fabricated like today’s silicon processor chips and may be easy to manufacture at the large scales needed for computation.

The NIST switch can reliably tune the interaction strength or rate between the two types of circuits,  qubit and a bus, rom 100 megahertz to nearly zero. The advance could enable researchers to flexibly control the interactions between many circuit elements in an intricate network as would be needed in a quantum computer of a practical size.
Other research groups have demonstrated switches for two or three superconducting qubits coupled together, but the NIST switch is the first to produce predictable quantum behavior over time with the controllable exchange of an individual microwave photon (particle of light) between a qubit and a resonant cavity. The resonant cavity serves as what engineers call a "bus"—a channel for moving information from one section of the computer to another. "We have three different elements all working together, coherently (in concert with each other) and without losing a lot of energy," ssaid CU-Boulder graduate student Michael (Shane) Allman who performed the experiments with NIST physicist Ray Simmonds, the principal investigator.

All three components (qubit, switch and cavity) were made of aluminum in an overlapping pattern on a sapphire chip (see image). The switch is a radio-frequency SQUID (superconducting quantum interference device), a magnetic field sensor that acts like a tunable transformer. The circuit is created with a voltage pulse that places one unit of energy, single microwave photon, in the qubit. By tuning a magnetic field applied to the SQUID, scientists can alter the coupling energy or transfer rate of the single photon between the qubit and cavity. The researchers watch this photon slosh back and forth at a rate they can now adjust with a knob.

The switch research was supported in part by the Army Research Office. Simmonds’s group previously demonstrated the first superconducting quantum bus between qubits (see "Digital Cable Goes Quantum: NIST Debuts Superconducting Quantum Computing Cable," www.nist.gov/public_affairs/releases/quantum_cable.html, which also describes how the superconducting qubits operate).

MEDER electronic, Inc. – Instrumentation Grade Reed Relays Offer Unparalleled Switching Technology
Four relay series make their mark in instrumentation applications and they do so like no other switching technology. The SIL HV, SIL RF, MSRF and CR series meet the miniature size and low profile requirements of today’s high tech designs, ranging in size from 8.6 mm [0.339] to 24.13 [0.950] in length and 3.4 mm [0.134] to 8.13 mm [0.320] in height. Designed to eliminate any magnetic coupling effect when stacked in matrices, they are equipped with an internal magnetic shield. Additionally, each series offers unique switching power and RF signal capabilities ranging up to 7 GHz.

The CR series is the smallest and most versatile instrumentation grade relay capable of switching signals up to 7 GHz and producing low offset voltages less than 1 microvolt.  Both the 1 GHz MSRF and 1.5 GHz SIL RF are miniature single-in-line relays capable of switching voltages up to 200 VDC and 1 amp while maintaining a consistent 100 milli-ohm on state resistance.  Both the SIL RF series and MSRF series can provide over 1,500 volts isolation, switch to coil.

The SIL HV series is an excellent high voltage / high current miniature single-in-line relay with a max power rating of 10 W, this series can switch up to 1,000 V and carry up to 5 amps for up to 50 milli-second at a consistent repetition rate. These relays can dielectrically hold off up to 4k VDC across the contacts as well as between contacts and coil.

austriamicrosystems Releases Robust, High-Resolution, Contactless Magnetic Angle Sensor With SAE SENT J2716 Interface
austriamicrosystems, a designer and manufacturer of high performance analog ICs, has released the AS5165, a contactless magnetic angle position sensor for accurate angular measurement over a full 360°. The high-resolution magnetic rotary sensor offers improved protection features for reliable operation in harsh automotive environments and includes a SENT J2716* interface for simple transmission of high-resolution sensor information.

The AS5165 magnetic encoder is a system-on-chip and combines integrated Hall elements, an analog front-end, digital signal processing and best in class automotive protection features – all in a single device. Offering the most reliable performance available, the AS5165 provides protection for the power supply and output pins against overvoltage up to 27 V; power supply pins are also protected against reverse polarity to -18 V. In addition, continuous short circuit detection and broken wire detection are provided and a unique patented fully differential architecture makes the sensor insensitive to stray magnetic fields. Automotive applications for the AS5165 include throttle and valve position sensing and several power train sensing applications.

To measure an angle, only a simple two-pole magnet rotating over the center of the chip is required. The magnet may be placed above or below the IC. The AS5165 is tolerant of magnet misalignment, air gap variations and temperature variations. No calibration is required because of the device’s inherent accuracy. The absolute angle measurement provides instant indication of the magnet’s angular position with a programmable resolution of 0.022° = 16384 positions per revolution.

The AS5165 is AEC-Q100 grade 0 qualified, comes in a TSSOP14 package, and operates from a +5 V supply over a -40°C to 150°C temperature range.

Bodine Electric Company Introduces New High-Performance Brushless DC Gearmotor with WX Gearhead
Bodine Electric Company has introduced its new WX gearhead in conjunction with its upgraded 34B-frame brushless DC motor. The WX is a new high-torque gearhead built to provide longer life and higher performance. The new WX gearmotors are designed to drive applications such as conveyor systems, packaging equipment, metering pumps, medical devices, commercial appliances and solar powered outdoor equipment.

The exterior of the new WX gearhead is identical to Bodine’s old W models, but the inside has been completely redesigned. These new WX gearmotors feature all-steel helical gear trains and synthetic lubricants, allowing the type 34B-WX to produce up to 65 percent more torque than previous models. The new steel gearing is designed to AGMA 9 standards or higher, to assure the quiet operation that is expected from Bodine Electric products. The synthetic lubricant in this new gearhead improves efficiency, and allows these gearmotors to operate in a wide temperature range. Forty-eight new stock models feature 12 available gear ratios, ranging from 4:1 to 312:1 and rated output speeds from 658 to 8 RPM.

The WX gearhead is now available with Bodine’s type 34B, TENV, 1/5HP (149 watts) brushless DC motors. These electronically commutated (BLDC) motors require less maintenance and last longer than traditional brush-type PMDC motors. The brushless construction results in a cooler running, quieter motor that can accelerate and decelerate quickly. They can be used in place of brush-type motors in applications where high starting torque and linear speed-torque characteristics are critical. The new 34B-WX gearmotors are offered with 130 VDC and 24 VDC windings and are available with or without accessory shafts for external encoder or brake installation.

“Bodine Electric has more than 20 years experience in design and manufacturing of brushless DC motor and control systems. We developed the 34B-WX as a direct response to the growing demand for brushless gearmotor solutions,” said Terry Auchstetter, manager of Business Development. “We also manufacture a complete line of matched of 24 V or 130 V brushless DC motor speed controls. When customers purchase the 34B-WX with a control, they get a complete drive system from one source.”

Bunting Develops New Design for Magnetic Cross-Belt Conveyors
Bunting Magnetics Co. has developed a new design for its Magnetic Cross-Belt conveyor product line. This new design features structural enhancements, an improved magnetic deep-reach circuit and tramp metal deflector shields that increase the protection of the belt.

“Whether you are recycling plastic, tire & rubber, wood, metals or e-scrap, these materials can be very abrasive on the belt and can easily get under the belt and onto the face of the magnet which can cause havoc,” said Don Suderman, Bunting product manager for Material Handling. “Our new design features UHMW wings that extend over the bottom side edges of the belt to protect it from tramp metal tears.”

Also, this new wing design seals the edge of the belt and keeps tramp metal from snapping to the side of the conveyor frame or getting under the belt. This protection against material getting under the belt reduces any hindrance to the operation of the conveyor. As additional protection, Bunting has further surrounded the magnet being used with a heavy-box stainless steel frame.

“Within any recycling facility, our Cross-Belt Conveyors will make a large impact on the efficiency of the operation in that facility,” Suderman said. “Our new magnetic circuit provides maximum separation effectiveness of tramp metal for municipal recycling and higher product purity in a shredding recycling operation.”

Cylinder Proximity Sensors
The Canfield Connector series 8D is a robust yet compact switch designed to sense position of pneumatic cylinders with magnetic pistons. The switch features an all encapsulated design with a metal over housing that protects the internal components from harsh environments. The switch comes in reed or electronic versions and has either 9 ft. PVC or 8 mm quick connect male pigtail A broad range of clamping styles make this a very versatile alternative for sensing round or tie rod type linear actuator. The switch comes standard with an indicator light that shows switching condition.

General Technical Data

• Temperature Range: Operational from -10° to +70°C
• Shock: Operational up to 30G (11 ms.) reeds, 50G electronic
• Vibration: Operational up to 9G parallel
• Sensitivity and orientation: 60G parallel (standard minimum required for proper operation, as measured on sensor surface.
• Size of sensing area depends on size and strength of magnet and thickness of cylinder wall
• Most versions designed to meet NEMA 6/IP67 specifications

Penny + Giles’ New Dual Redundant Output Rotary Position Sensor Extends Reliability/Accuracy for Safety Critical Systems
Penny + Giles, a business group of Curtiss-Wright Controls and a designer and manufacturer of high precision sensing technology, has introduced the SRH220DR, a new dual redundant output contactless rotary position sensor. The SRH220DR uses proven, non-contact programmable Hall-effect technology to provide OEMs with reliable and accurate rotary measurement in extreme industrial and off-highway environments.

This sensor, with a choice of integrated 6-way connectors, provides numerous programmable options. Designed for operation in extreme temperatures, the SRH220DR enables system designers to quickly and easily improve the safety and integrity of their control systems by using the dual independent power supply and output signals, allowing compliance with SIL-2 requirements for systematic safety as defined in IEC 61508.
The rugged SRH220DR is well suited for use in arduous operating environments and is suitable for use in diverse applications including cold planing machines (tracked steering control), garbage collection vehicles (bin lift control), road sweeping vehicles (4-wheel steering), and combine harvesters (header position control).

Penny + Giles’ configurable SRH220DR provides OEMs with a wide selection of parameter options including measurement range, and clockwise or anticlockwise direction output. This flexibility provides OEMs with a greater amount of control to configure the sensor to best suit their needs and achieve maximum performance.

Unlike conventional shaft-operated rotary position sensors, the SRH220DR has an integrated shaft and magnet assembly that activates the Hall-effect sensor through a hermetically sealed chamber. This allows the sensor to be used in extreme environments that are subjected to high shock and vibration, and endure immersion in fluids for short periods (IP68 protected).

The sensor’s molded housing includes a crush-proof mounting flange detail, which has stainless steel inserts, allowing fitting and re-fitting of the sensor without damage to the flange. The housing also includes a choice of integrated 6-way connectors compatible with AMP Superseal 1.5 or Deutsch DT06 profiles.

The SRH220DR can operate from either a 5 Vdc regulated or 9 to 30 Vdc unregulated power supply and has over-voltage protection to 40 Vdc. Each of its output channels can be supplied programmed with any one of 341 different angles in the range 0 to 20 to 0 to 360°, in one degree increments, and features a 12-bit resolution (0.025 percent) over the selected angular range.

To ease configuration, SRH220DR can be factory-configured with either analog (0.5 to 4.5 Vdc) or digital (Pulse Width Modulated) signal outputs as standard. It can also be factory programmed to offer 0.1 to 4.9 Vdc output range, matching the equivalent signals from a potentiometer. The SRH220DR’s two outputs can be used for error checking if they are set up to be opposed (clockwise on the first signal and anticlockwise on the second signal) and the output summed.

SRH220DR features electromagnetic immunity to 100 V/m and it has a very low maximum output signal noise of less than 1 mV. This means that no additional signal filtering is required on the output signal. It also has a class-leading non-linearity of ±0.4 percent. When powered with 5 Vdc, the SRH220DR has an operating temperature range from -40 to 140ºC, with a stability of less than ±30ppm/ºC. An optional lever arm kit can be supplied, where installations require this feature.

Allegro MicroSystems, Inc. Introduces Hall-Effect Latches with Increased Protection for High Voltage Transients
Allegro MicroSystems, Inc. has added several new devices to their existing line of Hall-effect latches. The A1225, A1227 and A1229 devices are temperature-stable and stress resistant sensor ICs well suited for operation over extended temperature ranges to 150°C. The intent of these latches is to provide a more robust product offering for those applications that require high voltage transient protection close to the sensors inside the system. Enhanced ESD structures provide ESD protection up to 8 kV HBM without external protection components and internal protection circuits enable these device to survive 40 V load dump compliance without external protection components. These devices are targeted at motor commutation applications in sunroofs and power windows within the automotive market.

Improved high temperature performance is made possible through a Schmitt trigger circuit that maintains operate and release point symmetry by compensating for temperature changes in the Hall element. Additionally, internal compensation provides magnetic switchpoints that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. The symmetry capability makes these devices well suited for use in pulse-counting applications where duty cycle is an important parameter.

The three basic devices (A1225, A1227 and A1229) are identical except for magnetic switchpoints. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, temperature compensation circuit, signal amplifier, Schmitt trigger, and a buffered open-drain output to sink up to 25 mA. The on-board regulator permits operation with supply voltages of 3.8 to 24 V.

The first character of the part number suffix determines the device operating temperature range. Suffix L is for –40°C to 150°C. Two package styles provide a magnetically optimized package for most applications. Suffix LT is a miniature SOT89/ TO-243AA transistor package for surface-mount applications, suffix UA is a three-lead ultra-mini-SIP. Both packages are lead (Pb) free with 100 percent matte tin leadframe plating. The A122xLLTTR-T is priced at $0.51 and the A122xLUA-T is priced at $0.60, both in quantities of 1,000.

MAGNETICS 2011 Announced
This two-day conference is a leading global event within the magnetics market, bringing together worldwide magnetics experts. This is a once-a-year opportunity for professionals involved in magnetics technologies to learn the latest advancements in magnetic applications, technology and materials.

Magnetics 2011 will focus on the latest advancements in magnetic applications, technology and materials. Serving OEM developers of products that utilize magnets and magnet systems, design engineers, OEM developers involved in EMC technology and magnetic effects, magnetics manufacturers and integrators, and material suppliers in the magnetics industry.

Magnetics 2011 is an opportunity to learn from technical experts and network with peers, professionals and potential business partners involved in a variety of applications. Learn about advancements in magnetic materials, as well as the latest technical innovations and application developments in the field of magnetics. Learn the outlook for pricing and economics. Discover the latest techniques, equipment and materials involved in the performance and control of magnetics. Learn from leading technical innovators the latest developments in how magnets are being applied, and magnetic effects utilized, to help optimize system and product performance in diverse applications.

The conference will be held March 1-2, 2011 at the Grand Hyatt in San Antonio, Texas. The event will be organized to provide numerous opportunities for networking including refreshment and networking breaks, discussion sessions, daily luncheons, reception, and tabletop or portable exhibits. The conference is organized by Magnetics Business & Technology magazine and produced by Webcom Communications Corp., the magazine's publisher.

Back by Popular Demand!
The 2011 Magnetics Conference will again be co-located with the Motor, Drive & Automation Systems Conference. We feel this addition in 2010 was a natural fit, one that provided added benefit to attendees, exhibitors and sponsors of both these world class technical events. Attendees to either event will again have access to the combined exhibit halls and networking breaks, receptions and luncheons. And for a nominal additional fee, attendees can have access to both conference programs.
 
Interesting in Sponsoring or Exhibiting?
Contact Sue Hannebrink at sueh@infowebcom.com

Interesting in speaking or hosting a pre-conference workshop?
Contact Heather Krier at heatherk@infowebcom.com

New Scale Technologies Receives SBIR Award to Develop Non-Inductive Rotary Actuator for US Navy
New Scale Technologies, Inc. has been awarded a Phase I Small Business Innovation Research (SBIR) contract from the US Navy to develop a non-inductive rotary actuator system that will move flight control surfaces in miniature precision guided munitions. The closed-loop actuator module incorporates piezoelectric micro motors and control electronics (drive ICs, position sensor and microprocessor) in a one-inch-cubed volume. The actuator system generates no magnetic fields, and can therefore be located in close proximity to navigation systems that use the earth's magnetic field to measure orientation and roll rate. The combination of small size and non-inductive operation enables further miniaturization of guided munitions systems.

The award supports New Scale’s continuing development of miniature motion systems based on its patented and patent-pending piezoelectric ultrasonic motor technology. New Scale is already commercializing miniature motion modules for several commercial applications including: mobile phone cameras with auto focus, zoom, or optical image stabilization; vibration or “haptic” motors that do not interfere with magnetic compasses used with GPS systems; medical devices that are MRI-safe and image compatible; and scientific instruments that function in large magnetic fields without degrading measurement accuracy.

This non-magnetic actuator system will use multiple piezoelectric motors to directly rotate a shaft, delivering 0.2 N-m torque and speed of 300 degrees/sec without gears or mechanical linkages. The system is designed to be simple, low mass and strong enough to withstand high launch accelerations. A key advantage is its extremely compact design and very high power density, achieved by optimizing the resonant frequency and Q (amplification) of each piezoelectric motor for maximum force and speed on the rotating shaft. Other rotary piezo motors have larger structures and propagate a single traveling wave through the entire structure, an approach that is difficult to optimize for power density, force and speed.

"This award allows us to build on our unique piezoelectric micro motor and driver technology, expanding further into the development of rotary micro actuator systems," said David Henderson, co-CEO and chief technology officer of New Scale. "The results will be a significant improvement over the current state of the art in non-magnetic actuator systems and will provide new benefits for both military and commercial customers."

Market Report: Global Permanent Magnet Industry 2010-2020
The report will be a bound book designed to be a resource for every sector of the Global Permanent Magnet Industry including producers, users, fabricators & distributors and industry suppliers.  It is a must have for anyone seeking to understand today's dynamics and planning for success in the ever-expanding Global Permanent Magnet Industry of tomorrow.
The authors (Terry K. Clagett, WebMagnetics Inc., Dr. Stanley Trout, Spontaneous Materials, Walter Benecki, Walter T. Benecki LLC) have a combined involvement in the Global Permanent Magnet Industry totaling nearly 100 years.  Each author compliments the others, bringing a unique skill set and extensive experience in their individual area of expertise. This yields a first of its kind, comprehensive reference and resource.
Global Permanent Magnet Industry 2010-2020 will include more than 250 pages of useful data and information that will be essential for anyone involved in the Global Permanent Magnet Industry.  It will be a valuable resource for:

• Strategic planning
• Researching acquisitions, investments or divestments
• Improving your overall "Magnet IQ"
• Establishing or assuring a reliable magnet supply chain
• Supplying goods and services to the industry

For more information click here.

The Technology World in One Location!
Top design engineers, system engineers and technical managers from multiple markets and industries will be converging in Dallas this fall, October 18-20, to attend six leading technical events that are being co-located for the first time ever. Make plans today to attend!

Battery Power 2010 • Thermal Management & Technology Symposium • REMOTE Site & Equipment Management 2010
Energy Efficiency Expo 2010 • Antenna Systems 2010 • Electrical Manufacturing & Coil Winding Expo

Download a PDF Copy of the Spring 2010 Issue of Magnetics Business & Technology Magazine

Feature Articles:

Rebuild vs. Replace
A Plan for the North American Rare Earth Value Chain

Columns:

Think Again: In-House Magnetic Manufacturing May be Good for Your Business Health
Hardware vs. Software

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