Archive for the 'Power Electronics' Category

If you have ever used the the Electrical  Engineer Library included with Visio, you will quickly learn just how crappy it is. Symbols do not align to the grid, they contain long connectors, and the shapes are just plain unprofessional.  I believe the example image shown in Fig. 1 clearly explains my point. The circuit [...]

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This article covers chapter 5 of my dissertation.     - Single-Phase Grid Connected Control     – Direct Digital Synthesis     - All Digital Phase-Lock Loop     - Software and Hardware in the Loop Experiments     – Rapid Control Prototypes and System Products  G. Pitel, “Fast power converters and rapid digital design,” UILU-ENG-2008-2509, CEME-TR-2008-02, December 2008, pp. 92-109.   

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Good news, my transactions was accepted–which means I can start letting dissertation chapters  trickle out into Internet land. Enjoy. This article covers chapters 1 and 2 of my disstertation. These chapters cover: – Dissertation Introduction – Voltage Source Buck Converter Modeling – Boost Converter Modeling – Voltage Source Inverter Modeling G. Pitel, “Fast power converters [...]

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23660 In an effort to make my life easier I decided to put PitelSPOT on its own dedicated server. In the past, all my web applications were run from my workstation, which has obvious disadvantages. I appologize to all those cutoff mid-article because I was doing some routine MATLAB/Vista reboot.  I wanted to share the [...]

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I decided to post my University of Illinois doctorate dissertation. If you have questions, please leave a comment below so we can have open discussions. This dissertation applies large-signal and time-domain models along with digital control to achieve fast control performance and to quickly test/design multi-block power controllers. Fast controls are needed for motherboard level [...]

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Somehow, my wife and I managed to share a car for the past five years. This arrangment worked because we live in a small town, both work at the University, and are attached at the hip. However, I am about to graduate and will need a car to commute. My wife still has about a [...]

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Battery Selection Battery life is often measured by cycle life, the number of full charge/discharge cycles before the battery reaches 80% of its original capacity. Keeping the discharge current relative to the battery’s ampĂ—hour capacity low and the discharge shallow improves battery longevity. Typical 12 V sealed lead acid (SLA) cells, like the ones found [...]

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If you are reading this post, you probably are experiencing decreased range and speed on your Go-Ped electric scooter. I too have experienced these problems, but I am going to share some solutions I came up with. I purchased a Go-Ped ESR-750 scooter this summer for transportation in Mountain View, CA for a summer internship. [...]

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There are many ways to measure a dc-dc converter’s inductor current for use in control. Direct-current resistance (DCR) is one low loss and cost method for measuring this current, it consists of a series RC network in parallel with the inductor. The RC network has some advantages over other methods: it has lower I2R losses [...]

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