Since 1994, the University of Minnesota has been undertaking a long overdue restructuring of power electronics and electric machines/drives courses. This restructuring allows digital control to be integrated into first courses, thereby teaching students what they need to learn, making these courses appealing, and providing a seamless continuity to advanced courses. By a concise presentation in just two undergraduate courses, this restructuring motivates students to take related courses in programmable logic controllers, microcontrollers and digital signal processor applications. This ensures a first-rate education that is meaningful in the workplace as well as in graduate education leading to a research and development oriented career. This restructuring has several components to it. Outdated topics that waste time and mislead students are deleted. To integrate control in the first courses, unique approaches are developed to convey information more effectively. In the first course in power electronics, a building block is identified in commonly used power converter topologies in order to unify their analysis. In the field of electric drives, the use of space vectors is introduced on a physical basis to describe operation of ac machines in steady state in the first course, and to discuss their optimum control under dynamic conditions in the advanced course. Appropriate simulation software and software-reconfigurable hardware laboratories using a DSP-based rapid prototyping tool are used to support the analytical discussion.
Industrial applications are every more quality, efficiency and operational av rotating machines. Therefore, monitoring quantities from a synchronous motor's or gen transmitting this data via wireless commun desirable for monitoring operating condition critical failures. Analysis of rotor operation th derived from assumptions and deduct measurements external to the machine can n with this new technology. This paper discusses the use of this tech data collected on the rotor of an electrical ro wireless telemetry, demonstrating how crucia technology is for event analysis in large sy for industrial applications.
A converter is described in this paper for use as a power electronics building block (PEBB). This PEBB can be utilized by itself or as a module in a larger converter. The converter utilizes a transformer, which adds isolation to the converter along with increasing the possible ways of configuring the modules. The PEBB is also bi-directional, which enables the PEBB to be suitable for a wider range of sources. The proposed PEBB is a direct converter. The direct conversion eliminates a capacitive filter, and when utilized with soft switching, increases the frequency of the voltage and current waveforms applied to the converter's filters. These advantages result in fewer components, reduced cost, higher reliability, smaller size, and higher operating temperatures for switches. When the PEBB is utilized in the cascade configurations proposed herein, the direct conversion further increases the above advantages. The converter also utilizes a commutation method that short-circuits the transformer winding and results in soft switching under all load conditions, bi-directional power transfer capability, and substantially reduces the power rating of the clamping circuitry. These advantages are typically possible with no increase in conduction loss, VA ratings, or number of components when compared to a hard switching converter. Due to the advantages above, the proposed converter results in a PEBB with high performance, small size, low cost, and more possibilities for configuring the PEBBs.I.
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