Power Analyzer with 8 Inputs Channels and high Accuracy

06 September 2021 - HIOKI announced its all new "Power Analyzer PW8001 and AC/DC Current Sensors CT6872 and CT6873." Shipments of both are scheduled to begin at the end of 2021. The Power Analyzer PW8001 is the new flagship model that brings together Hioki’s full technological expertise of highly advanced analysis and multi-frequency accuracy to respond to modern demands for high-precision, wide frequency bandwidth, and highly stabile measurement. Its next-generation digital platform enables high-speed power analysis of up to eight channels.

In addition, its new current sensor interface makes Hioki’s phase-correction technology, crowning Hioki’s current sensors with unrivaled accuracy in the market, even more reliable and easier to use by automating settings that would otherwise be done by hand.

The CT6872 (50 A current rating) and CT6873 (200 A current rating) are through-type current sensors with dramatically improved frequency bandwidth and noise-resistant performance based on our current market leading current sensors. It is ideal for evaluating compact, high-efficiency power supplies that are increasingly common in the areas of industrial equipment, data centers, and EVs (electric vehicles). Their performance are truly pronounced in the evaluation of high-speed switching power supplies equipped with next-generation power semiconductors composed of SiC (silicon carbide) and GaN (gallium nitride).

In order to prevent global warming and ensure our next generation can flourish in earth’s precious natural environment, efforts are being made around the world to realize a carbon-free society. One of these efforts is the electrification of automobiles. Fervent research and development in electrification and performance improvement is accelerating on a global scale. Efficiency and miniaturization of motors and power supplies which is key in this research, is furthering demands for sophisticated measurement of materials, parts, and electric control. Measurement instruments now require more precise and stable measurements of DC (0 Hz frequency) to high frequency currents, large currents, and low power factor. At the same time, devices being measured are increasingly complex and require multiple channels.

Main Features of the PW8001

• The PW8001 (module U7005) however achieves world class basic power accuracy of ±0.03% for commercial (50/60 Hz), and a DC (0 Hz) power accuracy of ±0.05% to provide more accuracy than other standard power analyzers in the market.
• The 5 MHz measurement bandwidth (increased from the previous model’s 2 MHz) is more important for SiC and GaN, the next-generation semiconductors increasing in use worldwide.
• The power analyzer gives the choice of two input modules with different measurement accuracy and measurement frequency bandwidth specs. Up to 8 input modules of the user’s choice (U7005 or U7001) can be freely combined into a single PW8001. The high-end module, U7005 (with aforementioned accuracy specs) and the more affordable module U7001 (basic power accuracy of ±0.05% and DC power accuracy of ±0.07% for commercial frequencies) allow for the optimum measuring system best suited for the user’s situation. The new model (U7001) allows for high voltage measurement of DC power. Rated at “DC 1500 V Category II” (CAT II), it can safely and accurately evaluate power supply equipment with a 1500 V DC voltage.
• The Power Analyzer allows the user to further tailor the analyzer to his/her specific application through its number of 8 channels and many optional functions.
• In systems used in developing vehicles, the in-vehicle communication protocol of CAN or CAN-FD is widely used to aggregate data. Until now, CAN/CAN-FD signals and power analyzers’ analog output signals were collected simultaneously, then later all data were integrated into a data logger. However, analog output signals pose problems such as repeatability degradation at the time of integration and limited number of outputs. To solve these problems, the PW8001 offers an optional function that outputs the measured power data as a CAN signal. This allows data to integrate many channels without degradation of power measurement accuracy for simultaneous evaluation of many behaviors of a vehicle. (This CAN/CAN-FD Interface is an optional function that must specified when ordering.)

Features of the Sensors CT6872 and CT6873

• The Hioki Current Sensors CT6872 and CT6873 are able to measure these frequencies very accurately with frequency bandwidths of up to 10 MHz and 5 MHz, respectively (a surprising 10-times increase from their previous models).
• In addition, these sensors are more accurate than their predecessor models with market leading accuracy by improving their amplitude/current accuracy and noise resistance (Common Mode Noise Rejection Ratio).

These Hioki Current Sensors with such dramatically advanced performance, combined with the Power Analyzer PW8001’s excellent high-frequency accuracy, enables accurate and highly reproducible power supply evaluations even in the high-speed switching power supplies equipped with next-generation semiconductors such as SiCs and GaNs.

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