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The latest news in energy efficiency
FEBRUARY 28, 2012

China's EV pollution problem
What they don't tell you about owning an EV
Passive solar heating for the rest of us
Safe and reliable alternative energy
Is 3D TV the next big power sink?
Energy shorts

China's EV pollution problem

In keeping with the theme of our Jan-Feb editorial viewpoint, our blog area this week highlights things-we-didn't-see-coming in the area of electric vehicles. Who knew EVs could be a pollution source in China? And our colleagues over at Wards Auto were surprised by range-mirage when they test-drove a BMW EV.
-- Leland Teschler, Editor, eeteditor@penton.com

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What they don't tell you about owning an EV

If EVs attain the kind of wide-spread popularity their promoters hope for, buyers of Chevy Volts, Nissan Leafs, and similar vehicles could find unexpected bills for pole-mounted distribution transformers showing up in their mailboxes. The distribution transformer on the pole outside your house typically handles about three to five homes and has a relatively small (25 kVA) capacity. That's less than the maximum theoretical load from each of those houses, but the scheme works because it's unlikely that every house on the block will run all its major appliances at the same time. Add EVs into the mix and the whole scenario changes.

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THE BASICS OF ROBOTIC MOTION
There are all types of industrial robots, and most can be broken down into a handful of basic components. One of the most basic are the drives and the controls. This article explains the differences, so that you can determine which is best for your project. THE BASICS OF ROBOTIC MOTION

Passive solar heating for the rest of us

Vertical window blinds from SolarChoice Heat, Chaska, Minn., are said to offer homeowners and business several advantages when it comes to heating and cooling, including cutting heating bills by as much as 35%. The aluminum blinds, which are 100% recyclable, have a flat black outer surface. Each aluminum blind is encased in a transparent PETG polymer sheath, which is also totally recyclable.

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Safe and reliable alternative energy

Can solar arrays catch fire? You bet they can. Judicious design of their inverter circuits can help minimize the need for a call to the fire department. Consider what happened when a solar panel installed in a San Diego house caused a fire a couple years ago. According to newspaper reports, the problem began with smoke coming out of the inverter box. The homeowner flipped the cutoff switch to disconnect the power but while she was on the phone with an electrician, the converter box caught fire. The fire continued to burn even after a fire extinguisher was emptied on it.

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Industrial Connectivity Basics
Industrial connectivity includes any component that is in the path of delivering power or control signals to do useful work. Typical connectivity components include connectors and terminal blocks, motor starters and relays. Download your copy at no cost

Is 3D TV the next big power sink?

The 3D TVs showcased at the recent Consumer Electronics Show are potentially more power- hungry than conventional sets of the same size. The TVs create the 3D image by alternating between two sets of the same image offset from one another by a small amount. Plasma and LCD displays have to operate at refresh rates (200 to 240 Hz ) fast enough to handle 3D images with no distracting flicker. Unfortunately, these faster refresh rates come at the expense of additional power dissipation.

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Energy shorts

The mathematics of battery efficiency
Hydroelectric power myths
Consumption of renewables growing at 2.8% annually
Silicon carbide MOSFETs get a SPICE model
Three-phase analyzers measure power waste
In the works: New Symbol for LED Lighting




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