Dr. Kirby Sweitzer of Mercy Medical Center in Canton, Ohio, assists a young patient during a recent visit to Honduras. More than a decade ago, Joan Buck, RN, surgical staff nurse, and Judy Melnyk, RN, surgery/operating room instructor — both longtime employees at Mercy Medical Center in Canton, Ohio — started collecting clean but "contaminated" surgical materials for annual medical mission trip...

This chapter deals with the design methodologies to obtain DC-DC converters with multiple outputs and only one inductor. The four possible schemes, buck, boost, and inverting or noninverting buck-boost, are considered. The key specific problems related to the issue are the inductor current switching scheme, the multiple-loops control, the suitable driving of power switches and, accordingly, the...

In this paper, H∞ loop-shaping control is applied to improve the performance of a buckboost dc-dc power converter based on pulse-width-modulation (PWM) techniques. Here, classical control techniques (i.e., proportional-integral-derivative (PID) control) and post-modern control techniques (i.e., H∞ control), are used to design the feedback loop of a buck-boost dc-dc power converter. The results ...

A buck–boost-type unity power factor rectifier is proposed in this paper. The main advantage of the proposed rectifier over the conventional buck–boost type is that it can perform input power factor correction (PFC) over a wider voltage conversion range. With a single switch, a fast well-regulated output voltage is achieved with a zero-current switch at turn-on. Moreover, the switch voltage str...

Electricity is one of the basic needs modern human life and already so integrated into everyday life. This understandable given coal's ample resources. Another factor that influences growth coal use plants are designed asa burden because price relatively cheaper. However, existence as fuel for power on decline not renewables. One applications renewable energy potential solar generation technolo...

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