Fast Switching Power Module Solutions for Applications with 1200V Component Rating

摘要

The market for power semiconductors is still dominated by industrial motor drive applications with switching frequencies less than 5 kHz. But more and more drive solutions use higher PWM-frequency (up to 20 kHz) to avoid audible noise. In other power applications like welding and power generation even higher frequencies are required to reduce the size, weight and cost of the passive components. Compared with 600V only a small amount of 1200V rated components are available for higher power applications running at 10 kHz < f_(PWM) < 50kHz. In drive applications the switching losses and the resulting de-rating are usually accepted. But the trend towards solutions with higher efficiency is clearly visible. And this goal is achievable without increase of costs.