Power Electronics

 

Supercapacitor Emulates Tree Leaves for Ever-Higher Capacity

The quest for improved energy density in both conventional batteries and supercapacitors sometimes takes especially interesting paths. In research supported by the Air Force Office of Scientific Research, a team at UCLA worked with other institutions (Mississippi State University, University of Nevada, Central South University) and looked to the structure of tree leaves. Both leaves […]

Read more >>> Supercapacitor Emulates Tree Leaves for Ever-Higher Capacity

Results from IEEE GlobalSpec’s fourth annual Pulse of Engineering Survey provide a number of insightful perspectives. “These findings provide an exclusive look into the mind of the engineer,” said Patrick Mahoney, CEO and President of IEEE GlobalSpec. “Industrial marketers across the globe can use this information to better target audiences, strengthen relationships with customers, develop […]

Read more >>> Survey Reveals Current Engineering Job Attitudes

You will see a power blog series from me on Power Electronics in the upcoming months. These blogs will post every other week, with topics centering around power supplies. This first installment will be about the low-dropout regulator (LDO). Succinctly, a dc-dc converter is a power-supply device that does just that: Change a dc voltage to […]

Read more >>> The Power Behind the LDO

Companies are beginning to acknowledge the potential of new markets and downstream revenue opportunities as they explore a more comprehensive “silicon to services” model that spans the data center to the mobile edge. More specifically, with eroding ASPs (average selling prices) and increasingly prohibitive design costs at ever lower nodes, many companies are searching for […]

Read more >>> The Semiconductor Industry Is in Transition

Power management involves test and measurement in three different levels: • System • Subsystem • Component At the system level, there are ac and dc power analyzers. At the subsystem level, a considerable amount of test and measurement systems can ensure a power supply is working properly. Testing at the component level mostly involves the […]

Read more >>> Power Management Chapter 24: Test and Measurement

There may be a new player in the semiconductor world, and it comes in the form of gallium-oxide technology. The material could assume a key role in improving electric vehicles, solar power, and other forms of renewable energy, according to Uttam Singisetti, PhD, associate professor of electrical engineering in University of Buffalo’s (UB) School of […]

Read more >>> Gallium Oxide Could Challenge Si, GaN, and SiC in Power Applications

Electric vehicles (Vs) are part of the fourth industrial revolution, driven by disruptive technological change. This disruption may produce upheaval and uncertainty, with winners and losers. As a result, these technologies can produce new products and new jobs, but also cause possible displacement of jobs. It appears that there will be new products and new […]

Read more >>> The EV Revolution Will Require More Engineers

Witches with their warty green faces and ominous cackling—like those huddled around a bubbling cauldron in Shakespeare’s Macbeth—may not seem to have all that much have in common with engineers. But engineers do have this kind of uncanny—almost magical ability—to troubleshoot problems, whether it’s coaxing dead products back to life, tracking down bugs hidden deep […]

Read more >>> Double, Double, Toil and Troubleshooting: Share Your Worst (Best?) Example of Diagnosing a Technical Glitch & You Could Win $500

A new combination of materials developed by Stanford University researchers may aid in developing a rechargeable battery that can store the large amounts of renewable power created through wind or solar sources. With further development, the new technology could deliver energy to the electric grid quickly, cost effectively, and at normal ambient temperatures. A flow […]

Read more >>> Advances Made in the Quest for Effective Energy-Storage Systems

Because safety-critical systems must work if there’s a power interruption of any kind, the next generation of self-driving vehicles can be expected to borrow a page from the commercial aviation industry: Provide redundancy not only for sensors and computer chips, but for the electrical architectures as well. That includes batteries, regardless of whether a 12- […]

Read more >>> Buck-Boost Controller Answers Call for Redundant Battery Systems

EMA Design Automation, a full-service provider and innovator of electronic design automation (EDA) solutions, recently launched its free eBook titled The Hitchhiker’s Guide to PCB Design, a resource for electrical engineers seeking to understand the complexities involved in printed-circuit-board (PCB) design.  “The role of the electrical engineer in PCB design is changing,” says Manny Marcano, […]

Read more >>> EMA Releases Free “The Hitchhiker’s Guide to PCB Design”

Power management plays a vital role in transportation systems that travel on land, air, and sea. Regardless of the particular application or technology, power management regulates, controls, and distributes power throughout that system.  Land transportation includes the automotive industry, whose requirements are specific and different from most industrial and commercial applications. Some of these power-management […]

Read more >>> Chapter 23: Power Management of Transportation Systems

Some applications require the monitoring of power applied to a system. Microchip Technology addressed this need with the MCP39F511A, a highly integrated, single-phase power-monitoring IC intended for real-time measurement of ac and dc inputs. It detects the input voltage and automatically sets operation in the appropriate mode, either dc or ac. Separate ac and dc […]

Read more >>> IC Monitors AC or DC Power Inputs with 0.1% Accuracy

Scientists are now testing the fuel-cell-powered Toyota Mirai that uses ultra-high purity hydrogen, produced using CSIRO membrane technology. CSIRO, an acronym for the Commonwealth Scientific and Industrial Research Organization, is an independent Australian federal government agency responsible for scientific research. Hydrogen is difficult to transport and store. Gaseous hydrogen can be transported by pipeline, but […]

Read more >>> Breakthrough Enables Safe Transport of Hydrogen for Fuel-Cell Vehicles

Usually when I write about films, it’s about something like the technology in the Martian or how the visual effects are done in movies such as The War for the Planet of the Apes. This time it’s about National Geographic’s Science Fair and the reason is a little different. I’ve been writing about science and […]

Read more >>> Science Fair—The Movie

Fuel cells convert the chemical energy from a fuel into electricity through a chemical reaction of positively charged hydrogen ions with oxygen or another oxidizing agent. They differ from batteries because they require a continuous source of fuel and oxygen or air to sustain the chemical reaction. Fuel cells produce electricity continuously as long as […]

Read more >>> Power Management Chapter 22: Fuel cells

Since the late 1990s, the 18650 lithium-ion rechargeable cell has been a common standard cell used in many devices and a host of applications. Like the ubiquitous AA, AAA, C, and D alkaline primary cells we use every day in flashlights, toys, radios, and practically anything that’s powered from a one-time use battery, the 18650 […]

Read more >>> The Standard 18650 Li-Ion Cell Isn’t Always Standard

Improve your time to market with oscilloscopes.

Read more >>> Designing for EMI testing (step-by-step guide)

A thermoelectric generator, TEG, is a solid-state device that converts heat directly into electrical energy through a phenomenon called the Seebeck effect. Thermoelectric generators consist of three major components: thermoelectric materials, thermoelectric modules, and thermoelectric systems that interface with the heat source. Thermoelectric materials generate power directly from heat by converting temperature differences into a […]

Read more >>> Power Management Chapter 21: Thermoelectric generators

Current sensing is used to perform two essential circuit functions. First, it is used to measure “how much” current is flowing in a circuit, which may be used to make decisions about turning off peripheral loads to conserve power or to return operation to normal limits. A second function is to determine when it is […]

Read more >>> Chapter 20: Components and methods for current measurement

Showing results 21 - 40 of 577 for the category: Power Electronics.