| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系電力電子產業碩士專班 === 108 === The main purpose of this thesis is to realize the application of three-vector duty cycle modulation modeless predictive current control on three-phase AC/DC converter. Traditional modeless predictive current control senses the amount of current change and uses a minimum cost function to predict a single optimal switching state within a single duty cycle. However, since only one switching state is used in one sampling period, the current tracking performance is limited. The three-vector duty cycle modulation modeless predictive current control consists of two adjacent effective vectors and one invalid vector. Three different modulation cycles and switching states are applied and sampled during a single duty cycle, and three different modulation cycles and switch states used during the next duty cycle are predicted.
The control core used in the experimental system in this thesis is the digital signal processor TMS320F28379D, and is implemented in a fully digitalized control mode. The results confirm that the three-phase AC/DC converter using the modelless three-vector duty cycle modulation predictive current control has better current tracking performance than the conventional one.
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