Title :
Control of an asymmetrical half-bridge DC filter used in 3-phase industrial rectifiers
Author :
Salmon, John ; Knight, Andy
Author_Institution :
Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada
Abstract :
A transformerless IGBT PWM asymmetrical half-bridge is described that regulates the DC output current of a 3-phase diode rectifier operating with a DC voltage rail. This 2-switch bridge can be designed with low per-unit voltage ratings, typically 10-15%, lowers the size of LC filter components, and guarantees equal current sharing between parallel rectifiers connected to the same AC supply. The higher conduction losses introduced are offset by using low voltage devices with lower on-state voltage drops, smaller filter components and an improved performance is obtained under balanced and unbalanced AC supply conditions
Keywords :
PWM invertors; active filters; bridge circuits; electric current control; insulated gate bipolar transistors; losses; rectifying circuits; 2-switch bridge; 3-phase diode rectifier; 3-phase industrial rectifiers; AC supply; DC output current regulation; DC voltage rail; LC filter components; asymmetrical half-bridge DC filter control; equal current sharing; filter components; higher conduction losses; low per-unit voltage ratings; low voltage devices; lower on-state voltage drops; parallel rectifiers; transformerless IGBT PWM asymmetrical half-bridge; Active filters; Active inductors; Bridge circuits; Current supplies; Diodes; Industrial control; Power harmonic filters; Pulse width modulation; Rectifiers; Voltage;
Conference_Titel :
Electrical and Computer Engineering, 2000 Canadian Conference on
Conference_Location :
Halifax, NS
Print_ISBN :
0-7803-5957-7
DOI :
10.1109/CCECE.2000.849649
