Sine amplitude conversion for dc-dc converters
Electronics Weekly columnist Bob Marchetti explains the importance of SAC to help improve energy efficiency and output.
In a column for Electronics Weekly, columnist Bob Marchetti explains how sine amplitude conversion can be used to help improve efficiency for dc-dc converters. He writes how old dc-dc transformers would switch dc into an alternating square wave to produce the required output. The problem was that harmonic components had to be filtered in the process. Too much potential energy, as a result, ended up being lost.
A sinusoidal waveform, by contrast, is more efficient because it is continuously oscillating at a fixed frequency. Conversion efficiency increases to 98% to 99%, contributing to both high power density and reduced thermal management requirements. Radiated and conducted harmonic content is also minimized because of the sine amplitude.
Marchetti believes this adjustment is key for energy regulation, especially in a time when the desire to be more and more efficient while trying to cut down on waste.
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2012 Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.