Gönenç, G. (1970). New Strategies for the Control of Electroheat Processes. PHD thesis, Aston University.
Abstract
The increasing use of electroheat in complicated industrial processes makes it necessary to investigate the current electroheat control methods with a view to developing new strategies. First, various models of electroheat processes are investigated. Methods for obtaining approximate models are evaluated in terms of their accuracy in the time domain. An analytical investigation of on-off control systems is presented. Digital simulation techniques for on-off control systems are discussed, and computer programmes are given. Open loop control of first and second order systems is investigated. The advantages and disadvantages of open-loop control are discussed. An indirect electroheat control scheme which uses a model of the plant in the feedback loop is proposed and discussed. It is shown that, by a suitable choice of the model parameters, performance criteria can be substantially improved. Pulse-width modulation (PWM) control of electroheat processes is presented as an alternative to indirect control. An analysis of PWM control systems, with particular reference to electroheat processes, is given. Digital simulation programmes based on this analysis are also included. Stability conditions are investigated analytically and the results are verified both by digital and analogue simulation. An exact analysis of limit cycling in PWM electroheat control systems is presented. The results of this analysis are verified by using analogue and digital simulation. The potential advantages of PWM for electroheat control are discussed.
| Additional Information: | Copyright © G Gönenç, 1970. G Gönenç asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately. |
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| Institution: | Aston University |
| Uncontrolled Keywords: | strategies,control,electroheat processes |
| Last Modified: | 30 Sep 2024 08:15 |
| Date Deposited: | 13 Feb 2014 14:51 |
| Completed Date: | 1970 |
| Authors: |
Gönenç, G.
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