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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/D1DE13D4-51C1-41C4-8B28-2C15E64B3865 | ||
| Year | 2024 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Panagiotis Michelakakis, "Study of an electric motor drive system using the SPWM method.", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2024 https://doi.org/10.26233/heallink.tuc.100932 | ||
| Appears in Collections |
The aim of this diploma thesis is to present the study, analysis and implementation of a DC to AC voltage source inverter (VSI), utilizing the beneficial Sinusoidal Pulse Width Modulation (SPWM) technique, in order to efficiently control the speed of an AC asynchronous-induction motor. For this purpose, the components which make up a motor drive system are briefly explained in general at first, and then, the relevant theory of DC/AC converters (called inverters) using the SPWM technique, the basics of AC machinery fundamentals, the relevant theory of induction motors, as well as some generic control strategies of AC motor drive systems are analyzed chapter by chapter. Eventually, a final of two chapters are following, one for simulations and comparisons of experimental results with the respective theory, while the last one stands for indicating the most significant conclusions and possible future work, according to this paper. The overall control system was built-up with MATLAB/SIMULINK software package. A variable frequency output waveform of sinusoidal type is produced by the inverter, to run and test a motor at variable speed and load torque conditions, which are directly related to this frequency. The overall circuit was also tested using a typical automatic control system, as constant ratio voltage to frequency (V/f) scalar control method, either in an open or in a closed loop configuration. The simulation results, based on a single-phase induction motor drive circuit fed by a single-phase SPWM inverter with a DC Voltage Source (DC is one type of energy found in batteries and AC is a type of energy produced by the power company and found in electrical homes/offices appliances), illustrated that the dynamic speed response of the induction motor is efficient enough, with improved THD and power quality (PF) factors. The overall results seemed to satisfy and apply to the theoretical conclusions pretty efficiently.
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