In pulsed traveling-wave high-intensity electron linacs large beam energy spreads are caused by the transient beam loading phenomenon. This energy spread is not only critical in high-energy accelerators, as the next generation of linear colliders, but it causes also problems in modern low-energy high-intensity linacs. Different compensation schemes were proposed recently for SLED driven structu...

A large portion of fatal crashes are characterized by passenger cars being hit at the front but without engaging the drive train or longitudinal structural beams. The objective of this paper was to describe a cost-effective sled test method developed to address the issue of small overlap crashes and fatal head injuries. A real-life small overlap crash and literature review revealed that, in mos...

In the Next Linear Collider (NLC) it is expected that the high power rf components be able to handle peak power levels in excess of 400 MW. We present recent results of high power tests designed to investigate the RF breakdown limits of the X-band pulse compression system used at SLAC. (SLED-II). Results of these tests show that both the TE01-TE10 mode converter and the 4-port hybrid have a max...

The responses of head and thorax of cadaver and Hybrid III were compared using frontal sled tests. Four pairs of tests were conducted at 50km/h. Two types of force-limiting belt were used. Subject instrumentation included head and spinal accelerometers. Following the tests, autopsies were performed. This research provided complementary information concerning human behaviour during sled test. Lo...

This paper presents a comprehensive survey of the current source inverter (CSI)-fed induction motor (IM) drives. It also reviews various control methodologies, selective harmonic elimination techniques and methods for reduction in switching losses in CSI fed IM drives. Authors strongly believe that this survey article shall be very much helpful to the researchers working in the field of CSI fed...

This paper deals with a comprehensive survey on the topic of AC/DC & DC/DC converters for DC Motor Drives. A substantial number of different AC/DC and DC/DC topologies appropriate for DC motor drives are presented. This critical literature review brings out merits, demerits, and limitations besides giving the basic operating principles of various topologies. Keywords—controlled-rectifiers, chop...

Flash drives with nice properties, e.g. good random read performance, has shown great potential to replace the current dominant storage medium hard disks. However, there are not many literatures that have conducted comprehensive study on the flash drive performance. In this paper, we aim to design a systematic strategy to efficiently measure the performance parameters of flash drives. We propos...

Herein is described an environmental and life cycle cost (LCC) analysis of one switched reluctance motor (SRM) drive and two inverter-fed induction motor (IM) drives. The two types of drives are compared based on critical reasoning, and European Commission (EC) Regulation 640/2009 is considered. Environmental impact and LCC were evaluated according the Methodology for the Ecodesign of Energy-Us...

in this paper, computer simulation of a three-phase synchronous motor drive is described. this drive/system is supplied with a new type of pulse-width modulated voltage source inverter (pwm vsi) whose amplitude of the first harmonic, compared to a conventional sinusoidal pwm vsi, is increased by about 17% and whose amplitude of higher harmonics is also reduced inversely proportional to their or...