High-voltage wide-bandwidth differential probe released

Yokogawa Test & Measurement Corporation has released its PBDH0400 series differential probe, which offers a maximum input voltage of 2000V and a frequency bandwidth of 400MHz. The probes can deliver the measurements needed for developing the next generation of higher-speed power devices that can contribute to the realisation of a sustainable society.

With growing emphasis on measures that will help to accomplish decarbonisation across all areas of society, there is a necessity to increase the energy efficiency of motors and inverters used in the transportation and renewable energy sectors. This requirement is particularly acute in the power electronics industry, where the increase in applications for and production of next-generation power devices utilising SiC technology necessitates the ultra-precise measurement of high-voltage and higher-speed signals.

This task requires performing measurements from an ungrounded (floating) potential, necessitating the use of differential probes rather than standard probes. The company set about developing wide-bandwidth differential probes capable of measuring high-voltage and high-speed signals. The new probes contribute to a more sustainable society through enhanced energy efficiency.

Initially, two models of the PBDH0400 series will be available: the 702922 model with a maximum input voltage of 2000V, and the 702921 with a maximum input voltage of 1000V.

To perform the accurate waveform observation of faster-changing signals prevalent in EVs and clean energy applications, PBDH0400 series differential probes measure voltages over 1000V and offer a wide frequency range from DC to 400MHz. This capability is particularly beneficial for developers of next-generation inverters, allowing the accurate observation of tiny changes in high-speed switching signals. In addition, excellent noise resistance enables the detection of events that can cause unexpected anomalies, including waveform overshoot and ringing.

The series features the company's probe interface, saving cost and installation space by eradicating the need for an external power supply when connected to one of its oscilloscopes. Furthermore, the probe attenuation ratio is automatically set through the interface so that measurement can start immediately after connection to the instrument. Combining the PBDH0400 with its 12-bit DLM5000HD or DLM3000HD oscilloscopes allows more accurate waveform measurements.