Category: Hipot/Safety

How to Use RF Impedance Measurements to Ensure the Quality of Miniaturized Power Inductors

How to Use RF Impedance Measurements to Ensure the Quality of Miniaturized Power Inductors

Most high-frequency and miniaturized power inductors are metal molding-type inductors. The magnetic metal powder surfaces are usually treated with an oxide layer to reduce eddy current losses at high frequencies, enhancing the usable frequency range and reducing losses and temperature rising. However, users typically cannot determine the particle size of the magnetic material and the integrity of the oxide layer after molding and sintering through visual inspection alone.

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June 19, 2024

Chroma Sync Hipot Tester Measures Up To 100 Channels Simultaneously

The 19020 was developed with the world’s first synchronous Hipot test function allowing one single unit to perform 10 channels sync output and measurements at the same time. A maximum of 10 units can be controlled for 100 channels in total. They can be grouped for output to avoid creating voltage differences. Chroma’s 19020 synchronizes the output signal removing risk of high voltage differences on adjacent DUT’s minimizing any occurrence of error in the test. Taking 5kVac output voltage for example, when the output of Hipot tester is not synchronized, two nearby DUT’s may create a difference of high voltage discharge of up to 14kV peak-peak causing damage to the fixture and erroneous testing.

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March 4, 2013