| Abstract |
Due to the diversity of power equipment: SMPS, induction motor drive, brushless motor drive, UPS, welding converters,... current and voltage are not only criteria for the choice of a switch. Environmental characteristics and dynamic performances of each application influence directly the choice of the switching frequency of the transistors. Two converters working under the same supply voltage with the same currents with switching frequencies of 1 kHz for one and 20 kHz for the other have different design and switches. After an analysis of mechanical and electrical characteristics of different high current switches the author will present two concrete realizations of 100 A / 700 V / 1 kHz and 500 A / 80 V / 20 kHz showing well adapted switches and original design solutions. |
