Drive for a half-bridge inverter

Details Drive for a half-bridge inverter Drive for a half-bridge inverter

2005-01-25

2005-01-25

Wong, Don (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S215000, C315SDIG007

Reexamination Certificate

active

06847174

ABSTRACT:
The selection of the dead time in the case of a half-bridge inverter influences the efficiency thereof. The optimal dead time, and thus the optimal switching-on time of a lower half-bridge transistor (T2) is accomplished according to the invention by virtue of the fact that switching on is delayed until the current in a level shift transistor (T3) has dropped below a given threshold. A further aspect of the invention consists in that the delay in switching on the lower half-bridge transistor (T2) is immediately suppressed whenever a charging current flows in a trapezoidal capacitor, and this is accompanied by the rise of the half-bridge output voltage (UHB) after the traversal of a minimum.

REFERENCES:
patent: 5068571 (1991-11-01), Schoofs
patent: 5550436 (1996-08-01), Houk
patent: 6002213 (1999-12-01), Wood
patent: 6744219 (2004-06-01), Neidlinger

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