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Improvements In Inverter Modeling And Control, Xiao Liu
Improvements In Inverter Modeling And Control, Xiao Liu
Theses and Dissertations--Electrical and Computer Engineering
In this dissertation, the generalized averaging method models for inverters, reactive power control methods for photovoltaic inverters, and a noise immunity improvement for hybrid position observers for brushless dc motor drives are studied.
Models of inverters and other converters based on averaging have been widely used in numerous simulation applications. Generalized averaging can be applied to model both average and switching behavior of converters while retaining the faster run times associated with average-value models. Herein, generalized average models for single- and three-phase pulse width modulation inverters are proposed. The modulation signal for the proposed model could be either a sinusoidal …
Average-Value Modeling Of Hysteresis Current Control In Power Electronics, Hanling Chen
Average-Value Modeling Of Hysteresis Current Control In Power Electronics, Hanling Chen
Theses and Dissertations--Electrical and Computer Engineering
Hysteresis current control has been widely used in power electronics with the advantages of fast dynamic response under parameter, line and load variation and ensured stability. However, a main disadvantage of hysteresis current control is the uncertain and varying switching frequency which makes it difficult to form an average-value model. The changing switching frequency and unspecified switching duty cycle make conventional average-value models based on PWM control difficult to apply directly to converters that are controlled by hysteresis current control.
In this work, a new method for average-value modeling of hysteresis current control in boost converters, three-phase inverters, and brushless …