Designing of the output stage of the impulse power source

• Published in: Russian electrical engineering 2015-08, Vol.86 (8), p.453-458
• Main Authors: Pavlenko, A. V., Vasyukov, I. V., Puzin, V. S., Grinchenkov, V. P., Bol’shenko, A. V.
• Format: Article
• Language: English
• Subjects: Engineering; Machines; Manufacturing; Processes
• ISSN: 1068-3712; 1934-8010
• DOI: 10.3103/S1068371215080106

Issues in designing of the output stage of an impulse power source are considered based on a bridge with hard switching. The calculation formulas for the amplitude values of the throttle current and impulses of the voltage at the filter input in the mode of discontinuous and continuous currents taking into account the influence of leakage inductance of the transformer and voltage drop at the rectifier diodes are given. Two submodes are defined in the mode of the throttle continuous currents—with a pause in the current of the secondary winding and without a pause. The peculiarity of the second submode is the independence of the output voltage of the power source on the PWM fill factor. While deriving the calculated dependences, the magnetizing inductance of the transformer was not considered, leakage inductance was supplied to the secondary winding, and the active resistances of the elements of the equivalent circuit were assumed equal to zero. Based on the proposed formulas, the algorithm of calculation of the output filter of the power source of bridge topology was modified. Experimental research on the breadboard model of the power source proved the effectiveness of the suggested design algorithm. The errors of calculation of the amplitude values of currents and voltages are significantly reduced as compared to the traditional method. As a result of the research that was carried out, it was stated that the power source designed not taking into account the leakage inductance of the impulse transformer cannot provide the required parameters.