Characterization of an Electrodynamic Levitator & Design of a Levitator Driver

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https://hdl.handle.net/2142/124899

Title: Characterization of an Electrodynamic Levitator & Design of a Levitator Driver
Author(s): Zou, Jiarui
Issue Date: 2021-05-01
Keyword(s): Electrodynamic Suspension, Bedford Levitator, Multiple-Winding Magnetic Model, Inverter Design, Two-level Bipolar Active Multi-phase Buffer.
Abstract: This thesis reports on the construction of a magnetic levitator that can suspend metal objects in the air freely without the assistance of any mechanical constraint. The classic Bedford levitator topology was used to levitate a metal sheet with 6-axis stabilization using the principle of electrodynamic suspension. The levitator was hand-built from scratch, characterized, and then modeled using the extended cantilever model. Few assumptions were incorporated into the model to help the modeling process. A driving circuit comprised of a two-phase 4-legged PWM inverter was designed and simulated. The inverter was constructed and tested. Various passive and active buffering methods were explored for double harmonic power decoupling. Methods of inrush current suppression were also simulated and are discussed here. The inverter was tested for various operating frequency, phase difference, and amplitude.
Type of Resource: text
Language: eng

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