Current Sensorless Control for Boost-Type SMR With Distorted Input Voltage

• Main Authors: Lin, Chih-Chieh, 林志杰
• Other Authors: Chen, Hung-Chi
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/27920481778093859561

碩士 === 國立交通大學 === 電機與控制工程系所 === 98 === The conventional multi-loop control senses input voltage, output voltage and inductor current to yield in-phase sinusoidal current and regulate the output voltage. In this paper, current sensorless control for boost-type switched mode rectifier (SMR) is proposed where only input and output voltages are sensed. The current sensorless control only have one voltage loop, therefore can reduce the control structure, the order of complexity, the number of sensors and meet international standard. In this thesis, the effects of input current waveform are analyzed and modeled with considering the inductor resistance and conduction voltages. From the simulation and experiment results, we can find that the input sinusoidal current is also in-phase with the input voltage even when the input voltage is significantly distorted. The developed control scheme can also be extended to other circuit topologies.