Electrical/Electronics

Addendum of Self-Aligned Ion Implant to Design and Processing of SiC High-Temperature Transistors for Durable Operation Above 400 °C

Applications include aerospace, oil and gas combustion, well drilling, transportation, and computers.Researchers at NASA’s Glenn Research Center have developed a revolutionary new generation of silicon carbide (SiC) integrated circuit (IC) chips, setting an unprecedented benchmark in the field of high-temperature electronics. In the past, SiC ICs could not withstand more than a few hours of 500 °C temperatures before degrading or failing. Now, Glenn has successfully fabricated prototype chips that can exceed 10,000 hours of continuous operation at 500 °C. The advanced performance stems in part from the development of Glenn’s patented iridium interfacial stack (IrIS), a bondable metallization stack that prevents diffusion of oxygen and gold into silicon carbide (SiC) integrated circuits operating above 500 °C. The enhanced reliability of these components (and the transistors and logic boards they support) will enable important improvements in the control and operation of combustion engines, well-drilling, and other harsh environment systems, thereby greatly impacting operational efficiency and environmental quality. This advance in the manufacture of SiC-based electronics also fundamentally revolutionizes the opportunities for intelligent systems operating in high-temperature environments.

Posted in: Briefs, Electronics & Computers

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Method and Apparatus to Detect Wire Pathologies Near Crimped Connector

NASA’s Langley Research Center has created a collection of innovations for rapid, precise, and verified crimps. Wiring crimp failures can be a threat to safety and may lead to a loss of critical functions in high-risk applications, such as aerospace. In addition to the safety concerns, diagnosing and repairing poor crimp connections can be costly. Langley’s crimping innovations increase quality and reduce risk by using ultrasound to provide real-time, nondestructive verification of wire-crimp integrity while the crimp is being formed. This technology can be applied to electromechanical crimping machines, where the appropriate force required to form a crimped connection is determined in real time. Such an application prevents over- or under-crimping, and prevents excessive tool wear. Langley has also created a means and method to calibrate and verify the mechanical and electrical settings for an ultrasonically enhanced crimp tool.

Posted in: Briefs, Electronics & Computers

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Preventing Cell-to-Cell Thermal Runaway in Lithium-Ion Battery Modules

Lithium-ion (Li-ion) cells are increasingly used in high-voltage and high-capacity modules. The Li-ion chemistry has the highest energy density of all rechargeable battery chemistries, but associated with that energy is the issue of catastrophic thermal runaway with a fire. With recent incidents in the commercial aerospace and electronics sectors, it was necessary to find methods to prevent cell-to-cell thermal runaway propagation.

Posted in: Briefs, Batteries

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Power Converters

Schaefer, Hopkinton, MA, introduced the C/B 4800 Series 6U DC/DC and AC/DC converter modules ranging in output power up to 5kW. Nine DC input ranges are standard, and AC input options are 1-Phase 115VAC or 230VAC, as well as 3- Phase inputs of 3 × 200VAC, 3 × 400VAC, or 3 × 480VAC. Battery charging models are also available. All modules feature a standard operating temperature of -20 to +75 °C.

Posted in: Products, Power Management, Manufacturing & Prototyping

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Power System

North Atlantic Industries, Bohemia, NY, announced the VPX56H-6 6U rugged VPX power product that provides up to 1,000 Watts of power (CC4 temperature range, full load) with five outputs, and is compliant with MIL-STD-704F. Other features include current share, remote error sensing, and a built-in EMI filter compliant with MILSTD- 461F. It has VITA 62 compatible keying, outputs and signaling, user programmability, I2C communication, geographical addressing, programmable over-temperature monitor, and a status LED.

Posted in: Products, Power Management, Manufacturing & Prototyping

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Power Supplies

The PS5R-V DIN-rail power supplies from IDEC Corp., Sunnyvale, CA, includes 7.5W, 10W, 15W, 30W, 60W, 90W, 120W, and 240W versions. Operating temperature ranges from -25 to +75 °C, enabling the supplies to be used in control panels without the need for air conditioning or other cooling devices. Other features are spring-up screw terminals that accept ring and fork terminals, as well as stripped wire.

Posted in: Products, Power Management, Manufacturing & Prototyping

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Energy Device

Murata Americas, Smyrna, GA, released UMAL, a low-profile energy device that delivers a slim, high-capacity energy source with a nominal voltage of 2.3 VDC. It can supply 12 mAh with a maximum discharge current of 120 mA, and withstands load fluctuations. It has a low internal resistance of 200 mOhm, and operates over the temperature range of -20 to 70 °C.

Posted in: Products, Power Management, Manufacturing & Prototyping

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