September 17, 2019 Volume 15 Issue 35

Electrical/Electronic News & Products

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EV automotive fuse safely interrupts up to 1000 VDC

High voltages and high currents occur in electric vehicles in numerous places. Their battery packs with several thousand rechargeable cells store enormous amounts of energy in order to provide for the demands of drive performance and distance, with the shortest possible charging times. Such applications require highly reliable fuses to safeguard this power. SCHURTER has just launched its AEO 10.3 x 38 mm mini-fuse series, particularly suited for battery protection in electric vehicles. The AEO series safely interrupts short-circuits up to 20 kA at 1000/800 VDC, with a current rating range of 10 to 50 A. SCHURTER's new, patented contact welding process guarantees the highest reliability and overcomes inherent weaknesses in solder joints.
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World's smallest image sensor

The OV6948 from OmniVision Technologies is the new winner of the Guinness World Record for "The Smallest Image Sensor Commercially Available" at a diminutive 0.575 x 0.575 mm. The company developed the tiny sensor to address the market demand for decreased invasiveness and deeper anatomical access in medical devices. OmniVision also offers the companion OVM6948 CameraCubeChip, a fully packaged, wafer-level color camera module measuring 0.65 x 0.65 mm, with a z-height of just 1.158 mm -- shown here next to a single peppercorn. The OVM6948 is the only ultra-small "chip on tip" camera with backside illumination, which provides excellent image quality and better low-light performance.
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Most advanced LIDAR sensor on the market

Velodyne's new Alpha Prime LIDAR sensor has a unique combination of breakthrough innovations that allows vehicles to navigate in unfamiliar and dynamic settings. It uses patented surround-view technology to deliver the combined highest performance specifications for the autonomous mobility industry in one sensor -- with reflectivity returns from over 4.8 million points per sec. Velodyne says this sensor is an unmatched solution in perception, field-of-view, and range for autonomous markets such as transportation, trucking, and robotics. It also offers a new level of power efficiency. Available now for orders and delivery.
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Voice capture at 4x the distance

Texas Instruments has just introduced a new audio analog-to-digital converter (ADC) capable of capturing clear audio up to four times farther away than competing devices. The TLV320ADC5140 is the industry's smallest quad-channel audio ADC with this level of performance. The device is part of a new family of three TI Burr-Brown audio ADCs that enable low-distortion audio recordings in loud environments, along with far-field, high-fidelity recordings in any environment. Applications include high-end smart speakers, sound bars, wireless speakers, high-def TVs, IP network cameras, teleconferencing systems, and smart appliances.
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Powerful LED curing lamp for tight work spaces

DELO now offers a compact LED curing lamp for use in industrial applications with limited work space. The powerful DELOLUX 503 is designed to bond small surfaces, like cameras used in autonomous cars, within seconds on serial production lines. The new lamp directs light diagonally downward so that it does not need to be installed at level with the components that need to be bonded. This gives more moving space to axes or grippers and helps to integrate complex systems. The UV lamp ensures high process reliability through continuous intensity control, internal control, and monitoring of important parameters like LED temperature. Up to four LED heads can be controlled by DELO controllers or by an external PLC, allowing the adhesive to be evenly exposed from several angles.
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Cool Tools: Videoscopes with tons of options

A new line of industrial videoscopes from Titian Tool Supply features inter-changeable video probes that allow for the use of different insertion tube lengths and diameters with one video unit. There are 5 different models with 3 diameter sizes and 3 lengths available. TVG-PRO Series videoscopes feature a 5-in. LCD monitor and have either 180° or full 360° articulation. They are designed for on-site inspections and maintenance on a wide range of transportation equipment, including aviation, locomotive, and gas and diesel engines; machinery, manufacturing, and metalworking, including inspections of castings and cavities; pipeline and container manufacturing; as well as power generation.
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Bend the rules of lighting design: Cut and form LED sheets

VCC is bending the rules of lighting design with its new VentoFlex tiles. The VentoFlex modular lighting system opens up countless ways for architects and lighting designers to make an impact. Available in 12-in. x 12-in. sheets, these innovative LED tiles can be cut and formed around any design element, including rounded corners and tight spaces, without taking up much room at all -- just 0.15 in. (3.81 mm). A pair of scissors is the only tool required to cut VentoFlex tiles to the size and shape you desire. Ten or 15 tiles can be linked together to one driver and dimmer to create thousands of square inches of versatile lighting power! This product is in the running for the 2019 Elektra Awards LED Product of the Year in Europe.
Learn more about this new and exciting lighting technology.


Compact hydraulic/pneumatic position sensors

Novotechnik's TM1 Series of position sensors are designed for use in hydraulic and pneumatic cylinders -- especially in tight-space applications. They are based on magnetostrictive technology and are available in screw flange or plug-in flange models. A ring-shaped magnetic marker moves up and down the sensor's shaft for touchless operation. Specs include stroke lengths from 50 to 2,000 mm (1.9 to 78.7 in.) and accuracy to +/-0.04 percent.
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Spark-proof EC fans use 50% less energy

Orion Fans has extended its electronically commutated (EC) fan product offering to include a 254-mm IP68-ATEX-rated version for waterproof and harsh environment applications. The low-power OA254EC-ATEX Series EC fan combines energy conservation with maximum protection for power-hungry applications involving explosive atmospheres or flammable gases. It delivers air flows of 500 to 830 CFM. EC fans can be used in most any AC fan application with the added benefit of power savings of up to 50 percent. EC fans often enable customers to meet energy-consumption requirements from agencies like ENERGY STAR. Ideal as a drop-in replacement for AC fans, the larger OA254 IP68-ATEX Series EC fans are suited for oil & gas applications including oil rig and oil refining equipment. The fans are also used in walk-in refrigeration systems, commercial display coolers, EV and charging systems, servers, food services equipment, and other applications.
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Protect vulnerable electronics from voltage transients and lightning events

Littelfuse has released a new series of higher surge TVS Diode products in a DO-214AB package. The 8.0SMDJ series is optimized to protect sensitive electronic equipment from transient voltage induced by lightning and other voltage events. Because it combines up to 8,000 W of peak pulse power dissipation in a compact DO-214AB SMC package, the 8.0SMDJ series offers circuit designers a high-surge, space-saving circuit protection solution that can simplify printed circuit board design and improve reliability significantly. Typical markets and applications include: home appliances, consumer electronics, industrial, data centers, AC and DC protection, and PoE protection.
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No-wear flat magnetic angle sensors

Novotechnik U.S. has just introduced the Vert-X 05E Series of magnetic rotary position sensors with compact, flat housing. Interfaces include analog, SPI, and incremental. The series is available in single and redundant versions. The sensors are touchless magnetic angle sensors with a permanent magnet that can be secured to an application's rotating shaft, so there is no direct mechanical linkage between the shaft and the measuring system -- and therefore no wear. Key specifications for Vert-X 05E include 5-mm profile, 0 to 360° measurement range, repeatability of 0.1° or better, and maximum hysteresis of 0.1°. Sample rate is up to 5 kHz, and its active measurement region extends to within 6 mm from edge of housing.
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High-speed image sensor for AI, drones, robotics

ON Semiconductor has introduced the ARX3A0 digital image sensor with 0.3 Mega-Pixel (MP) resolution in a 1:1 aspect ratio. With up to 360 frames per second (fps) capture rate, it can perform like a global shutter in many conditions but with the size, performance, and responsivity benefits of being a Back-Side Illuminated (BSI) rolling shutter sensor. With its small size, square format, ultra-low-power requirement, and high frame rate, the ARX3A0 is particularly suitable for emerging Machine Vision, Artificial Intelligence, IOT, drones, robotics, and AR/VR applications, as well as small supplemental security cameras.
Learn more.


Can electrical resistance be used to predict shielding effectiveness?

Conductive elastomer EMI shielding gaskets use metallic particles to create a conductive path and shield enclosures from electromagnetic radiation. Gaskets with silver particles, which are very conductive, often outperform gaskets with graphite particles. However, this is not always the case. A common misconception is that a measurement of DC resistivity can directly predict shielding effectiveness. Ben Nudelman, market development engineer at Parker, explains why.
Read this informative Parker Hannifin blog.


Standard and custom process heaters -- fast delivery

Durex builds standard as well as custom heaters for a host of applications and industries, including power plants, oil and gas, chemical and petrochemical, pharmaceutical, plastics, packaging, heat treating, cleaning and plating, aerospace, semiconductor processing, and food service equipment. The Cary, IL, company now offers screw plug, flange immersion, and circulation heaters with fast-turn shipping capabilities. Durex uses product platforms to provide standard "catalog" type designs as well as customized designs in the same fast turnaround window. Plug heaters ship in 3 to 5 days. Flange heaters ship in 5 to 7 days. Circulation heaters in 9 to 12 days. No upcharge for customized units or "non-standard" configurations.
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Cool Tools: Fluke revamps industrial thermal camera line

Fluke has retooled its entire line of industrial thermal cameras with more premium features packed into every model, providing higher value for the customer and allowing the company to reduce the number of cameras it offers to simplify the buying process. From an industrial pocket thermal imager to a line-up of 640 x 480 resolution infrared cameras, these tools take professional inspections to the next level.
Read the full article.


Researchers produce synthetic Hall effect to achieve one-way radio transmission

Researchers at the University of Illinois at Urbana-Champaign have replicated one of the most well-known electromagnetic effects in physics, the Hall effect, using radio waves (photons) instead of electric current (electrons). Their technique could be used to create advanced communication systems that boost signal transmission in one direction while simultaneously absorbing signals going in the opposite direction.

The Hall effect, discovered in 1879 by Edwin Hall, occurs because of the interaction between charged particles and electromagnetic fields. In an electric field, negatively charged particles (electrons) experience a force opposite to the direction of the field. In a magnetic field, moving electrons experience a force in the direction perpendicular to both their motion and the magnetic field. These two forces combine in the Hall effect, where perpendicular electric and magnetic fields combine to generate an electric current.

Light isn't charged, so regular electric and magnetic fields can't be used to generate an analogous "current of light." However, in a recent paper published in Physical Review Letters, researchers have done exactly this with the help of what they call "synthetic electric and magnetic fields."

Principal investigator Gaurav Bahl's research group has been working on several methods to improve radio and optical data transmission as well as fiber optic communication. Earlier this year, the group exploited an interaction between light and sound waves to suppress the scattering of light from material defects and published its results in Optica. In 2018, team member Christopher Peterson was the lead author in a Science Advances paper that explained a technology that promises to halve the bandwidth needed for communications by allowing an antenna to send and receive signals on the same frequency simultaneously through a process called nonreciprocal coupling.

In the current study, Peterson has provided another promising method to directionally control data transmission using a principle similar to the Hall effect. Instead of an electric current, the team generated a "current of light" by creating synthetic electric and magnetic fields, which affect light the same way the normal fields affect electrons. Unlike conventional electric and magnetic fields, these synthetic fields are created by varying the structure that light propagates through in both space and time.

"Although radio waves do not carry charge and therefore do not experience forces from electric or magnetic fields, physicists have known for several years that equivalent forces can be produced by confining light in structures that vary in space or time," Peterson explained. "The rate of change of the structure in time is effectively proportional to the electric field, and the rate of change in space is proportional to the magnetic field. While these synthetic fields were previously considered separately, we showed that their combination affects photons in the same way that it affects electrons."

By creating a specially designed circuit to enhance the interaction between these synthetic fields and radio waves, the team leveraged the principle of the Hall effect to boost radio signals going in one direction, increasing their strength, while also stopping and absorbing signals going in the other direction. Their experiments showed that with the right combination of synthetic fields, signals can be transmitted through the circuit more than 1,000 times as effectively in one direction than in the opposite direction.

The research could be used to produce new devices that protect sources of radio waves from potentially harmful interference, or that help ensure sensitive quantum mechanical measurements are accurate. The team is also working on experiments that extend the concept to other kinds of waves, including light and mechanical vibrations, as they look to establish a new class of devices based on applying the Hall effect outside of its original domain.

In addition to Peterson and Bahl, co-authors Prof. Taylor Hughes, Mao Lin (Department of Physics at Illinois), and Dr. Wladimir Benalcazar (Physics at Penn State University) contributed to the theoretical developments in this work.

Source: University of Illinois Grainger College of Engineering

Published September 2019

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