IGBT MODULAR STRUCTURES OF POWER INVERTERS WITH TWO AND THREE LEVELS OF THE OUTPUT TENSIONS: Effects of the frequencies of the first harmonics and the switching on the temperature

Vesselin Vassilev; Anton Andonov

Volume : V, Issue : XII, December - 2015

IGBT MODULAR STRUCTURES OF POWER INVERTERS WITH TWO AND THREE LEVELS OF THE OUTPUT TENSIONS: Effects of the frequencies of the first harmonics and the switching on the temperature

Vesselin Vassilev, Anton Andonov

Abstract :

The communication reports a study on the temperature effects of the frequencies of the first harmonics as well as the switching in case of IGBT inverters under conditions of equal output powers. Three–phase IGBT inverters with two (2L) and three (3L) levels of the power outputs have been investigated. The inventers with three levels (3L) have been investigated in case with passive (3L–NPC) and active (A–NPC) restrictions with respects to the neutral. Some advantages of the 3L modules at high frequencies of commutations have been discussed.