EXPERIMENTAL CHARACTERIZATION OF A MAGNETOHYDRODYNAMIC POWER GENERATOR UNDER DC ARC PLASMA

Low-Power CMOS Ramp Generator Circuit for DC-DC Converters

Ramp-signal generators are particularly critical in controlling the frequency and dutycycle of pulse-width modulated (PWM) switching supplies. They are normally implemented with a timed charging current source into a capacitor and a reset switch controlled by two comparators whose reference signals set the lower and upper limits of the ramp. A fast comparator is required to ensure the reset ope...

Experimental Characterization of Hybrid Power Systems Under Pulse Current Loads

The electrochemical performance characteristics of a prismatic lithium-ion battery, ultracapacitors, and hybrid combinations at ambient temperature are considered. The effects of pulse current, duty cycle and hybrid combinations are studied. Current pulsing was shown to improved the total energy discharged from the lithium-ion battery and battery / capacitor hybrid combinations over that of a c...

Arc Handling Considerations for DC Sputtering Power Supplies

Sputtering is an important physical vapor deposition (PVD) method in the manufacture of many products. However, sputtering processes are prone to arcing, which can cause damage to the work piece. Therefore, arcs must be detected and extinguished in a timely manner to minimize damage. Instantaneous arc rate and total arcs per process step are useful data for assessing PVD chamber health, and det...

Portable Nano-Hydro Power Generator for the DC House Project

Experimental Characterization of an Integrated Starter/Generator

This thesis presents the characterization of an integrated starter/generator (ISG) based on an interior permanent-magnet (IPM) synchronous machine. The ISG is designed to operate in a hybrid vehicle; mounted to a traditional gasoline engine and coupled directly to the crankshaft. An experimental comparison is made between the design and the working prototype including a detailed description of ...