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As this paper shows, the magnetic coupling of the inductances of two hystereak-controlled singlephase A G b D C boost converters connected in parallel leads in connection with a delayed switching of the power transistors to a SeK-adjusting s t a g g e d switdmg of the the partial systems. Thereby, a s m c a n t reduction of the ripple of the resulting mrrins current as compared to the uncoupled case is obtained. Based on the analytic deacription of the current shapes within a pulse period the dependency on the circuit parameters of the occurring phase displacement of the switching functions of the partial systems is calculated. Furthermore, the d e c t of an unsymmetry of the converters on the system behavior is analyzed and the automatic adjustment of the phase shift within a mains period is investigated by digital simulation. The theoretical considerations are verified by measurements on a laboratory model. Finally, the poesibility of a substitution of the magnetic coupling of the input inductances of the partial systems by a coupling of the current controls of the converters is discussed.

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