- At PCIM Expo 2026, taking place in Nuremberg from June 9-11, Rohde & Schwarz will showcase its latest test and measurement systems for power electronics.
- Demonstrations will focus on the characterization of SiC and GaN components and the analysis of power transmissions for applications related to AI data centers, renewable energy, and e-mobility.
Three-Phase Analysis with an Oscilloscope
Rohde & Schwarz is introducing the R&S MXO-K333 three-phase power analysis option for its MXO 3, 4, 5, and 5C series oscilloscopes. This software update enables the characterization of three-phase AC networks while retaining the original waveform visualization for fault cause analysis.
A setup wizard guides the user in assigning the eight available channels of the MXO 5 oscilloscope to three voltage probes and three current probes. The system supports two-, three-, or four-wire cabling (2V2A, 3V3A, 3VN3A configurations) and automatically validates the connections. After configuration, the instrument calculates RMS values, power factor, and active, reactive, and total power per cycle. It also generates vector diagrams and a total harmonic distortion (THD) analysis compliant with IEC 61000-3-2.
This oscilloscope integration provides time-triggering capabilities that complement the purely statistical data of conventional power analyzers, thus facilitating the debugging of industrial converters and distribution networks.
Electric Powertrain Efficiency Measurement
Following the acquisition of ZES Zimmer Electronic Systems, Rohde & Schwarz has added the LMG671 series power analyzer to its product catalog. This instrument is designed to quantify losses within electric powertrains.
The system continuously measures the ratio between the inverter’s input and output power, while simultaneously capturing the motor’s mechanical power via speed and torque sensors. The inverter’s output signal is decomposed into three frequency bands (fundamental, harmonic, and wideband) to isolate high-frequency losses. All results and graphs are displayed on a customized user interface.
Characterization by Dual-Pulse Testing
In collaboration with PE-Systems, an automated dual-pulse test bench will be presented to analyze the dynamic switching behavior of automotive power modules, such as the Hitachi Energy RoadPak SiC module.
The system is based on the rack-mounted eight-channel R&S MXO58 series oscilloscope, combined with the R&S RT-ZISO series of isolated probes. This configuration enables repeatable measurements on SiC and GaN components in an automated environment, reducing human intervention in extracting switching parameters.
