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.

Related resources

AppCard: Increasing test coverage in hard switching half bridge configurations

Power converter and inverter designs for higher power levels are usually based on hard switching half bridge configurations. In such setups, users must pay particular attention to proper switching operations to prevent shoot-through events. Setting up complex real-time trigger conditions using the R&S®RTE and R&S®RTO oscilloscopes increases the test coverage and robustness of converter and inverter systems.

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White paper: Gate drive measurement considerations

The more successful a gate driver is in reducing power-up and power-down times, the bigger the headache for accurate measurements. Both choosing the right probe and optimizing the probing technique are significant factors in improving measurement accuracy. This white paper provides guidelines

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Webinar: Half bridge and gate drive measurements and techniques

Register and watch the webinar from March 2020: Half bridge and gate drive measurements and techniques with Tom Neville, Technology Manager at Rohde & Schwarz.

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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.

Related products

R&S®RTM3000 / RTA4000

See more of your signal with the power of 10. With up to 1 GHz bandwidth, these oscilloscopes offer 10-bit vertical resolution and ultra deep memory for longer acquisitions at full bandwidth.

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R&S®RTE1000/RTO2000

These fully integrated multi-domain oscilloscopes are excellent tools for analyzing switching behavior and debugging EMI issues. These scope series have up to 6 GHz bandwidth, 16-bit vertical resolution and up to 2 Gsample maximum memory depth.

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R&S®RT-ZHD high voltage differential probes

Designed in-house with superior performance, large differential and common mode range and superior common mode rejection across the bandwidth.

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Related topics

Efficiency testing

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EMI debugging and analysis

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Control loop analysis

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