Power Electronics

 

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

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

As reported last month via PRNewswire, over 5,000 inventions are being suppressed via the U.S. Government’s classified patent program, according to official data obtained under a recent Freedom of Information Act request by the Federation of American Scientists. This means literally thousands of potentially ground-breaking inventions and technologies are being withheld from the public. A […]

Read more >>> FreeTheTech Finds 5,784 Inventions Suppressed by U.S. Government Secrecy Orders

Scientists at the Florida State University-headquartered National High Magnetic Field Laboratory have discovered a behavior in materials called cuprates that suggests they carry current in a way entirely different from conventional metals such as copper. The research, published in the journal Science, adds new meaning to the materials’ moniker, “strange metals.” Cuprates are high-temperature superconductors […]

Read more >>> Cuprates: High-Temp Superconductors that Defy a Scientific Explanation

Users of rechargeable batteries have two ongoing complaints: They don’t provide enough capacity (run time), and they take too long to recharge. A research team at Cornell University hopes to fix that with an approach which allows the battery to self-assemble with a unique, higher-capacity internal structure than standard batteries, and enables far-faster recharge. Their […]

Read more >>> Novel Techniques, Materials Cut Battery-Recharge Cycle Time

Download this article in PDF format. Your utility Power Factor is the ratio of the system’s Real Power and the Apparent Power (Eq. 1). This unitless factor ranges from −1 to 1. The Power Factor ratio aptly describes the type of storage elements in the circuit and the stability of the current-to-voltage relationship. More importantly, […]

Read more >>> How Does Power Factor Correction Impact Your Utility Bill?

Electric vehicles (EVs) may reduce pollution, but they also create a safety hazard. A 2009 study by the U.S. National Highway Traffic Safety Administration (NHTSA) found that crashes involving pedestrians and bicyclists have higher incidence rates for EVs than internal combustion engine (ICE) vehicles in low-speed vehicle maneuvers, such as reversing or leaving a parking […]

Read more >>> EVs Need to Sound Off

As the demand for smartphones, electric vehicles, and renewable energy continues to rise, researchers are searching for ways to improve lithium-ion batteries—the most common type of battery found in home electronics and a potential way to store grid-scale energy. A team of scientist at Brookhaven National Laboratory have found a way to boost the energy […]

Read more >>> New Cathode Material Triples the Energy Storage of Lithium-Ion Batteries

The key component in a motion system is the motor because it determines the design of the associated motion controller as well as the motor drive. From a power-management viewpoint, the important motion-system design considerations are providing the appropriate control signals as well as the required drive power for the specific motor. Each motion controller […]

Read more >>> Chapter 19: Motion-System Power Management

The U.S. Department of Energy’s Pacific Northwest National Laboratory has issued its annual report on distributed wind capacity, revealing that large installations of distributed wind power almost doubled in 2017. Distributed wind power is localized, so the power is generated near where it will be used rather than originating in remote commercial wind farms and […]

Read more >>> Distributed Wind Power on the Rise

Every engineer knows that a stable, well-regulated power supply is needed to perform reliable and consistent circuit and subsystem tests. But what about testing a new power-supply, regulator, or converter design itself? Before a circuit designer decides on a particular power supply, he or she will first want to test it carefully. The datasheet for […]

Read more >>> Testing Power Supplies: Small Issues Have Big Effect on Results

Out of all of the fundamental passive electronic components, capacitors are arguably the most abundantly used. In fact, it is hard to find a circuit board that does not have a capacitor on it and a circuit that does not use a capacitor. Capacitors  play key roles in the design of filters, amplifiers, power supplies […]

Read more >>> Capacitor Basics and Their Uses in Power Applications

Showing results 41 - 60 of 587 for the category: Power Electronics.