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Content Provider | IET Digital Library |
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Author | Balan, Horia Tirnovan, Radu Buzdugan, Mircea I. |
Abstract | This study presents some specific problems concerning the DC–AC commutation of the power converters used in frequency controlled electromagnetic actuators. Starting from the initial conditions imposed for a low-cost simple inverter used for driving an electromagnetic vibrator, two commutation possibilities are analysed (unmodulated voltages and simple modulated voltages). The harmonic analysis performed in this study, permitted the analytic determination of the load current distortion coefficient against the control angle in the case of simple modulated voltage. The energetic performances (the real power and the power factor) of the system were evaluated through the power factor, determined analytically as a function of the operating frequency and the control angle α. The influence of the control angle on the current distortion factor has been highlighted experimentally using a programmable source, which allowed the synthesis of different waveforms at different frequencies. The novelty of this study consists in the analysis of the influence of the control variable angle α on energy parameters of electromagnetic vibrators, which allows a lower distortion factor and an appropriate power factor, both at a lower cost and lower commutation losses compared with pulse width modulation converters. Section 1 presents the technologies using commutation techniques analysed in Sections 2 and 3; Section 4 represents an analysis of the energetic performances, whereas in Section 5 experimental results for a vibro-compaction equipment are presented. |
Starting Page | 132 |
Ending Page | 140 |
Page Count | 9 |
ISSN | 17554535 |
Volume Number | 7 |
e-ISSN | 17554543 |
Issue Number | Issue 1, Jan (2014) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/7/1 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0172 |
Journal | IET Power Electronics |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Commutation Technique Control Angle Current Distortion Factor DC-AC Power Converter DC–AC Commutation Distortion Electromagnetic Actuators Electromagnetic Actuators Supply Electromagnetic Device Application Electromagnetic Vibrator Electromagnetic Vibrators Energetic Performances Energy Parameter Frequency Controlled Electromagnetic Actuators Harmonic Analysis Invertors Load Current Distortion Coefflcient Low-cost Simple Inverter Modulated Voltage Power Converter Power Electronics Power Factor Power Supply Programmable Source Pulse Width Modulation Converter Supervisory Circuit Unmodulated Voltage Vibro-compaction Equipment |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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