Control loop analysis

Power conversion

Switching analysis

Solutions for power conversion switching analysis

To maximize a power converter’s performance and efficiency, a common practice is to increase the switching frequency. When increasing a power design’s switching speed, the timing characteristics, interactions between high and low side transistors, and undesired outcomes such as shoot-through and excessive EMI must be accounted for. Rohde & Schwarz oscilloscopes, power probes, and software enables power designers to characterize and optimize their designs.

Switching analysis on wide bandgap devices

Power conversion designs migrating from silicon to wide bandgap

An increasing number of power converter designs that use wide bandgap (WBG) materials such as SiC and GaN have become commercially available. A WBG semiconductor's fast switching capability must be well characterized to determine the power losses during switching and conduction, to optimize efficiency gains and to avoid negative effects such as shootthrough or excessive EMI. A Rohde & Schwarz oscilloscope with high resolution and low noise combined with a Rohde & Schwarz high-voltage differential probe with superior common mode rejection across frequency allows power converter designers to:

  • Accurately measure power losses during switching and conduction
  • Verify rise/fall time from hundreds of ps to 10s of ns
  • Characterize timing events such as dead time

Read the R&S High-Voltage Differential Probes Factsheet:

Switching analysis measurement equipment

Power conversion designs are switching at higher frequencies and moving toward higher voltages. Making accurate switching analysis measurements requires a high-resolution oscilloscope and high voltage differential probes with top performance, large differential and common mode range, and high common mode rejection across the bandwidth.

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R&S®MXO 5 Oscilloscope

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R&S®RT-ZHD high voltage differential probes

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