Title :
Improved immunity of current sensorless AC-DC converters for mains voltage disturbances
Author :
Ghijselen, Jozef A L ; Van Den Bossche, Alex P M ; Melkebeek, Jan A A
Author_Institution :
Lab. for Electr. Machines & Power Electron., Ghent Univ., Belgium
fDate :
6/23/1905 12:00:00 AM
Abstract :
AC-DC converters can be succesfully controlled without line current sensors or estimators. This approach is generally referred to as indirect current control (ICC). However, the lack of actual line current information renders the converter susceptible to mains voltage disturbances. Inductor voltage control (IVC) requires no line current measurement or estimation. IVC was recently shown to be successful for the control of buck-type AC-DC converters, which exhibit continuous inductor voltage waveforms. In this paper, the IVC approach is extended and applied to the discontinuous inductor voltage waveforms of boost-type AC-DC converters. To demonstrate its use, a basic IVC control loop is implemented to improve the immunity for mains voltage disturbances of an ICC boost-type AC-DC converter. The results are verified on a 400 V, 2.2 kW prototype
Keywords :
AC-DC power convertors; control system synthesis; electric current control; harmonic distortion; power conversion harmonics; power inductors; rectifying circuits; switching circuits; voltage control; 2.2 kW; 400 V; boost-type AGDC converters; buck-type AGDC converters; continuous inductor voltage waveforms; current sensorless AC-DC power converters; discontinuous inductor voltage waveforms; indirect current control; inductor voltage control scheme; mains voltage disturbances immunity; AC-DC power converters; Analog-digital conversion; Current control; Current measurement; Filtering; Filters; Inductors; Sampling methods; Sensorless control; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954208
