Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"hysteresis control"”.
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Controlled on-time power factor correction circuit with input filter
An active power factor correction circuit with controlled on-time is proposed. The circuit has a simpler control scheme than the power bc10r correction circuit with hysteresis control, and yet is able to attain high power factor. A very important aspect of this work was the formulation of the …
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Design and analysis of an active power factor correction circuit
… power factor correction circuit with variable-hysteresis control for off-line dc-to-dc switching power supplies is described. Design equations relating the boost inductor current ripple to the circuit components selection and circuit performance arc discussed. A computer-aided design program …
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Direct Power Control of AC Motors
In this thesis, the possibilities of direct power control (DPC) of induction motors (IMs) and permanent magnet synchronous motors (PMSMs) fed by a voltage source inverter have been studied. Three different approaches of DPC for IMs and one for PMSMs are proposed and investigated. They are: (a) …
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A series-stacked power delivery architecture with isolated converters for energy efficient data centers
… system for a four-server rack is created. A control algorithm is developed for server to virtual bus differential power processing and the proposed solution is also supported with experimental results. This thesis presents an experimental demonstration of a series stacked server power …
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Material Characterization of Nitinol Wires for the Design of Actuation Systems
… The wire transient data can be used to design a controller which reduces the actuation time. The research done for the overall project covers a wide scope including wire hysteresis, nitinol transition temperature, variable wire resistance, wire actuation as a function of current and pull force, …
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Two Methods for Modeling Scalar Hysteresis and their use in Controlling Actuators with Hysteresis
The accurate control of a positioning system that exhibits scalar hysteresis requires a control strategy that incorporates compensation for the hysteresis. One approach is to develop a compensator based on an inverse hysteresis operator. This method uses an open loop control in which the inverse …