Improvement of High-Power Three-Level Explosion-Proof Inverters Using Soft Switching Control Based on Optimized Power-Loss Algorithm

Figure 18

The experimental temperature results of IGBT’s surface and substrate. (a) IGBT surface temperature of NPC3L inverter; (b) IGBT surface temperature of S3L inverter; (c) IGBT substrate temperature of NPC3L inverter; (d) IGBT substrate temperature of S3L inverter.

(a)

(b)

(c)

(d)