Metrology Lab

Metrology Lab by Hioki

Trends in power electronics products are moving in the direction of high voltage and high current. Many of our customers’ requests stem from high voltage and high current environments.

Metrology Lab, run by Hioki, is a market leader in two evaluation methods: electrical insulation evaluation and dynamic impedance. Needs for these topics are increasing due to recent evolution of power electronics. Our goal is to establish new evaluation technology and disseminate solutions.

Please use the form at the bottom of the page for inquires about the solutions posted on this site, to consult about these topics, and to request sample tests.

Dynamic impedance testing solutions : Fuel cells, electrolyzers for hydrogen production, power electronic components such as capacitors and coils

Insulation evaluation testing solutions : Insulation test / partial discharge test of motors, power modules, and electrical insulation materials

Dynamic impedance testing solutions

Simultaneous Measurement of the Impedance of Battery Modules and Individual Cells

This application note proposes a method for performing acceptance inspections (degradation diagnostics) of lithium-ion batteries, including for recycling, and battery module evaluations more quickly using simultaneous, multipoint AC impedance measurement.

Simultaneous, Multi-point Impedance Measurement of Operating Fuel Cells

Simultaneous multipoint impedance measurement with no missing data for each fuel cell in operation. Maximum current of 2000 A and maximum voltage of 1500 V are supported.

Impedance measurement of water electrolysis cells used in hydrogen manufacturing

This Application Note describes a simultaneous, multipoint impedance measurement solution for comprehensively capturing data from cells and stacks in operating (live) water electrolysis systems used in hydrogen manufacturing. It can accommodate currents of up to 2000A.

DC Current Superposition Testing of Coils Using a Power Analyzer

We certified that a Power Analyzer can be used to perform high-accuracy DC current superposition testing (DC current bias testing) of high-current coils.

Insulation evaluation testing solutions

Automatic partial discharge (RPDIV) using impulse voltages as defined in IEC 61934

With conventional impulse testers, it is difficult to automatically perform partial discharge (RPDIV) testing as defined in IEC 61934. Sequence Maker, a free Excel add-in, quickly creates programs that make it possible to automate such testing.

Partial Discharge Testing of Motor Stators Using an Impulse Tester and Oscilloscope

It’s possible to check for insulation defects in motor stators by observing current waveforms during impulse testing. If there are insulation defects between coils, partial discharges will occur at a lower voltage.

Partial Discharge Testing of Motor Stators Using a Withstand Voltage Tester and Oscilloscope

It’s possible to check for insulation defects in motor stators by observing current waveforms during withstand voltage testing. If there are insulation defects between a coil and the core, partial discharges will occur at a lower voltage.

Automatic impulse testing of motor stators using high-voltage relays

When the test voltage for impulse testing of motor stators exceeds 1500 V, it becomes difficult to obtain relays for use in switching test circuits. Consequently, such tests rely on manual measurement or manual switches. This application proposes an approach for automating impulse testing of stators.

Equipment at Metrology Lab

A list of measuring instruments owned by Metrology Lab. Measuring instruments not on the list can be prepared if they are Hioki product.

Measuring instrument nameModel / ManufacturerApplication example
Power analyzerPW6001 / HiokiImpedance measurement of batteries, fuel cells, and water electrolysis cells for hydrogen production
High precision current sensorVarious / HiokiFor impedance measurement, DC/AC current measurement
Bipolar power supplyVarious / manufacturersCharging/discharging device, DC/AC power supply, measurement power supply
High accuracy resistance testerRM3545 / HiokiFor resistance measurement
LCR meterIM3570 / HiokiLCR measurement, measurement signal level / frequency sweep
Withstanding voltage / insulation resistance tester3153 / HiokiAC DC withstand voltage test, insulation resistance test
Impulse testerST4030A / HiokiInterlayer short circuit detection test, partial discharge test
Digital oscilloscopeMDO4000 / TektronixPartial discharge waveform for observation
High voltage probeVarious / manufacturersPartial discharge waveform for observation
High frequency current probeVarious / manufacturersPartial discharge waveform for observation

New Arrivals

Release dateContents
October 21, 2021DC Current Superposition Testing of Coils Using a Power Analyzer
October 12, 2021 Automatic impulse testing of motor stators using high-voltage relays

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