Power spectra of a three-phase inverter with random pulse width modulation modes
| dc.contributor.author | Kwok, Samuel Tin-Chu | en_US |
| dc.date.accessioned | 2024-08-14T18:34:11Z | |
| dc.date.available | 2024-08-14T18:34:11Z | |
| dc.date.copyright | 1993 | en_US |
| dc.date.issued | 1993 | |
| dc.degree.department | Department of Electrical and Computer Engineering | |
| dc.degree.level | Master of Applied Science M.A.Sc. | en |
| dc.description.abstract | Power inverters convert DC voltage to single- or multi-phase AC voltage. For three phase inversion, the voltage control is realized by means of Pulse-Width Modulation (PWM) of the switching variables a, b, and c which represent the control signals for individual phases of the inverter. In this thesis, analysis of the harmonic power spectra of the three-phase, voltage-controlled inverter with randomized lead-lag modes of operation will be presented. In these modes, the pulses of switching variables are either leading- or lagging-edge modulated. The randomized PWM technique provides non-repetitive switching patterns which result in spreading of distinct harmonic power over a wider frequency range. Experimental confirmation of the derived closed-form equations of both continuous and discrete spectra is provided. Further, a brief outline of the future work, which is to find the optimal switching pattern (i.e. probability density function) based on certain optimization criteria, is also presented. | en |
| dc.format.extent | 121 pages | |
| dc.identifier.uri | https://hdl.handle.net/1828/18514 | |
| dc.rights | Available to the World Wide Web | en_US |
| dc.subject | UN SDG 7: Affordable and Clean Energy | en |
| dc.title | Power spectra of a three-phase inverter with random pulse width modulation modes | en_US |
| dc.type | Thesis | en_US |
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