Title :
A stabilized single phase electronic autotransformer
Author :
Trabach, Emerson P. ; Amaral, Paulo F S ; Simonetti, Domingos S L ; Vieira, José L F
Author_Institution :
Dept. of Electr. Eng., Fed.. Univ. of Espirito Santo, Brazil
fDate :
6/21/1905 12:00:00 AM
Abstract :
A stabilized single-phase electronic step-down autotransformer with improved switching characteristics is presented in this paper. It employs bi-directional switches in a four step PWM switching strategy for commutating inductive load currents. A low cost microcontroller is employed simplifying the control circuitry, giving robustness and reliability. A 600 VA-220 V/110 V prototype operating at 18 kHz has been built, and experimental results are presented validating the AC controller operation
Keywords :
PWM power convertors; autotransformers; commutation; power semiconductor switches; switching circuits; 110 V; 18 kHz; 220 V; 600 VA; AC controller operation; bi-directional switches; four step PWM switching strategy; inductive load current commutation; microcontroller; reliability; robustness; stabilized single-phase electronic autotransformer; step-down autotransformer; switching characteristics; Bidirectional control; Circuits; Commutation; Microcontrollers; Pulse width modulation; Snubbers; Switches; Switching loss; Transformer cores; Voltage control;
Conference_Titel :
Industrial Electronics Society, 1999. IECON '99 Proceedings. The 25th Annual Conference of the IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-5735-3
DOI :
10.1109/IECON.1999.822200
