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Improvements at the micro level of power management have been slow but steady over the last few years, but the real action in power management is at the macro, big-picture level, where a number of long term trends are starting to make their mark.

Over the past few years, we've seen a market rebound, a move towards IGBTs at the expense of bipolar transistors, and a continuing consolidation in semiconductor suppliers.

Design-wise, we've seen a move towards lower voltages and higher switching frequencies, exemplified by the Intel FIVR (Fully Integrated Voltage Regulator) which made its appearance in the Haswell core in 2013 and supplies 1.1V to the rest of the IC with 90% efficiency at a switching frequency of 140 MHz. All in a 22 nm process, no less.

Regulations Worldwide Drive Energy Efficiency Improvements

The last few years have been relatively quiet in the US -- in 2014, for example, only 129 "Public Laws" (laws affecting society as a whole) were passed by Congress and signed by the president. But fear not - regulatory agencies also issued 3541 rules (27 per law) that also have the force of law.

Numerous regulations and updates cover energy efficiency across a broad spectrum of applications including refrigeration, consumer AC-DC power supplies, power distribution transformers, commercial HVAC systems, electric motors, and more. New standards are also being developed to cover computers and servers, portable air conditioners, and reflector lamps. In a worldwide trend, state and local governments have their own sets of regulations. For example, the 2012 Energy Efficiency Directive established a set of binding measures to help the EU reach its 20% energy efficiency target by 2020. Under the Directive, all EU countries are required to use energy more efficiently at all stages of the energy chain, and member countries were required to transpose the directive's provisions into their national laws by 5 June 2014.

Such directives are driving power management changes including increased use of BLDC motors, more sophisticated power supplies, solar panel research, introduction of new lighting technologies, and on and on.

The moral of the story: Before starting your next product design or update, take a closer look at the Code Of Federal Regulations: 175,496 pages as of the end of 2013. Probably pushing 200k today.

New Battery Chemistries Move Close to Commercial Introduction

The incursion of battery power into areas previously dominated by corded devices - or internal combustion engines - has been a consistent trend in power management over the last decade. Li-ion batteries, first introduced in the early 90s, still rule the roost, but they require precise control of charging and temperature to avoid fires caused by thermal runaway. Meanwhile, progress has been slow in developing commercially-viable batteries using other chemistries such as lithium-sulphur, zinc-air, and sodium-oxygen. Issues include availability and cost of the raw materials, stability or safety of the chemical combination, manufacturability, reversibility of the electrochemical reaction, dendrite formation, and operating temperature range.

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5 Power Trends Will Pay Off Soon

SAN JOSE, CA Bentek, a manufacturer of a broad range of OEM power distribution products for the residential, commercial and utility-scale marketplaces, has begun shipment of the Bentek Commercial PV PowerRack-AL for three-phase inverters.

Bentek is pleased to begin shipping our new three-phase commercial Inverter PowerRack-AL, said John H. Buckley, Executive of Sales and Marketing for Bentek. The PowerRack-AL is a cost-effective, easy-to-install racking solution for three-phase commercial inverters.

The universal PowerRack-AL provides a common design that fits ABB, Advanced Energy, Chint, Schneider, SMA, Solar Edge, SolarMax and Solectria three-phase inverters. The Bentek Inverter PowerRack-AL can be shipped directly to any commercial jobsite where three-phase inverters can be integrated and installed on commercial rooftops. Bentek also can integrate commercial three-phase inverters and Bentek AC disconnects in its ISO 9001:2008 factory and ship the Bentek Inverter PowerSkid directly to the commercial jobsite. Bentek PowerSkids, when installed within 10 feet of the PV array, allow for NEC 2014 section 690.12 Rapid Shutdown code compliance while saving the customer time and money in simplifying the installation.

For more information about the capabilities of the Bentek Inverter PV PowerRacks and PowerSkids, please contact Bentek at 1-866-505-0303 or visit http://www.Bentek.com.

About Bentek Founded in 1985, Bentek is a leader in engineered electromechanical and power distribution solutions for industrial applications. Bentek designs and manufactures products such as wiring harnesses, electrical combiner boxes, and custom OEM assemblies for the solar energy and semiconductor markets. Bentek is an ISO certified company. For more information, contact Bentek Solar at 866-505-0303, e-mail SolarSales@bentek.com or visit http://www.Bentek.com.

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Universal Rack facilitates inverter installation and setup.

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The holiday shopping season may be over, but donations continue to arrive and fill local nonprofit thrift stores, causing some to scramble to find time and room to accommodate increased inventory.

We are getting more donations than we have ever gotten before, said Connie Elliott, vice president at Napas Community Projects thrift store in downtown.

She said one of the reasons is that Community Projects is one of the few Napa nonprofits with retail storefronts that accept donations. Elliottalso said that many Napans, especially those involved with schools, like to donate to Community Projects because they know that Community Projectsuses its proceeds to donate to local schools and charities.

People like to donate to us because it does go back to the community, she said.

Elliott said that as of January, the nonprofit stopped accepting donations on Wednesdays. Before that, the store had accepted donations six days a week, excluding Sundays.

No donations accepted today. Full to capacity, read a sign seen in the parking lot earlier this month. We apologize for the inconvenience.

We dont like to put the sign out but every so often we are just buried, said Elliott. Wednesdays are now used as a catch-up day for sorting whats already been received, instead of processing additional donations, she said. Were hoping that helps us.

Roseanne Kohlhepp, manager at Napas Goodwill store in River Park center, said that this time of the year is always busy for drop-offs.

Most people want to get the tax write-off from making donations, she said.

Napa is such a great supporter of Goodwill, said Brandy Evans, chief operating officer of Goodwill Industries of the Redwood Empire. On weekends we will get absolutely buried.

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Early spring cleaning: Donations fill local thrift stores

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