Dynamic control of the permanent magnet assisted reluctance synchronous machine with constant current angle

Simple item page
dc.contributor.advisorKamper, M. J.
dc.contributor.authorDe Kock, Hugo Werneren_ZA
dc.contributor.otherUniversity of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering.
dc.date.accessioned2008-01-29T09:00:12Zen_ZA
dc.date.accessioned2010-06-01T08:39:47Z
dc.date.available2008-01-29T09:00:12Zen_ZA
dc.date.available2010-06-01T08:39:47Z
dc.date.issued2006-03
dc.descriptionThesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006.
dc.description.abstractThis thesis is about the dynamic control of a permanent magnet assisted reluctance synchronous machine (PMA RSM). The PMA RSM in this thesis is a 110 kW traction machine and is ideal for the use in electrical rail vehicles. An application of the dynamic control of the PMA RSM in electrical rail vehicles is to reduce wheel slip. The mathematical model of the PMA RSM is derived and explained in physical terms. Two methods of current control for the PMA RSM are investigated, namely constant field current control (CFCC) and constant current angle control (CCAC). It is shown that CCAC is more appropriate for the PMA RSM. A current controller for the PMA RSM that guarantees stability is derived and given as an analytic formula. This current controller can be used for any method of current control, i.e. CFCC or CCAC. An accurate simulation model for the PMA RSM is obtained using results from finite element analysis (FEA). The accurate model is used in a simulation to verify CCAC. A normal proportional integral speed controller for the PMA RSM is designed and the design is also verified by simulation. Practical implementation of the current and speed controllers is considered along with a general description of the entire drive system. The operation of the resolver (for position measurement) is given in detail. Important safety measures and the design of the electronic circuitry to give protection are shown. Practical results concerning current and speed control are then shown. To improve the dynamic performance of the PMA RSM, a load torque observer with compensation current feedback is investigated. Two observer structures are considered, namely the reduced state observer and the full state observer. The derivation of the full state observer and the detail designs of the observer elements are given. The accurate simulation model of the PMA RSM is used to verify the operation of the observer structures and to evaluate the dynamic performance. Both observer structures are implemented practically and practical results are shown. One method of position sensorless control, namely the high frequency voltage injection method, is discussed in terms of the PMA RSM. This work is additional to the thesis but it is shown, because it raises some interesting questions regarding the dynamic control of the PMA RSM.en_ZA
dc.format.extent5812940 bytesen_ZA
dc.format.mimetypeapplication/pdfen_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/2062
dc.language.isoenen_ZA
dc.publisherStellenbosch : University of Stellenbosch
dc.rights.holderUniversity of Stellenbosch
dc.subjectTheses -- Electronic engineeringen_ZA
dc.subjectDissertations -- Electronic engineeringen_ZA
dc.subjectTheses -- Computer scienceen_ZA
dc.subjectDissertations -- Computer scienceen+_ZA
dc.subject.lcshReluctance motorsen_ZA
dc.subject.lcshMotion control devicesen_ZA
dc.subject.otherElectrical and Electronic Engineeringen_ZA
dc.titleDynamic control of the permanent magnet assisted reluctance synchronous machine with constant current angleen_ZA
dc.typeThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
dekock_dynamic_2006.pdf
Size:
5.54 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.72 KB
Format:
Plain Text
Description:
Download
Collections
Masters Degrees (Electrical and Electronic Engineering)