Efficiency enhancement of high-power interleaved DC-DC converter by using an improved phase shedding control with phase equivalent resistance.

DC-DC converters generally maintain poor efficiency when operating at light to medium loads. This is primarily due to the fact that switching losses outweigh conduction losses significantly, while core losses remain constant regardless of the load conditions. In the case of the interleaved boost converter (IBC), this efficiency deterioration increases more than the conventional boost converter (CBC), when the number of phases increases.

Mechanical chest compression with a medical parallel manipulator for cardiopulmonary resuscitation.

Background: Chest compression is the primary technique in emergency situations for resuscitating patients who have a cardiac arrest. Even for experienced personnel, it is difficult to perform chest compressions at the correct compression rate and depth.

Methods: We describe a new translational three-revolute-revolute-revolute (3-RRR) parallel manipulator designed for delivering chest compressions.