Low-Power SMD InductorsThe 1nH-10uH inductors with bias current ranging from 0-10A and operating at frequencies from 10KHz to 1MHz are crucial for their DC bias characteristics in high-speed digital circuits. Luminaries with weak DC bias applied in computer motherboards, network communication devices, and EMC electromagnetic compatibility pose unknown risks. These inductors are widely used, small in size, but traditional bias current testing methods are slow and cannot meet production line testing requirements. Lida High-Tech, utilizing the NF ZM2376+ Chiyoda PP30-17 high-speed constant current source and their self-developed DC bias voltage/current combined unit, can quickly and accurately perform the above tests (speed: 400-700 pieces/minute).
LCR Meters Combined with DC Current Superimposition Units
Power inductors with DC bias measurement
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Line testing requirements often demand high measurement speed, which directly impacts production capacity. A rapid measurement testing system is a necessary condition for the production line.
Solution
Through the integration ofThe LCR meter combined with the DC current superimposition unit can measure inductance with a superimposed current of 6A. This allows for the measurement of inductance in power inductors used in automotive and inverters under conditions close to actual use.
Combined Equipment
Utilizing the DC bias current unit developed by Li Gao Datong in combination with the Chiyoda constant current source, to prevent the DC current from flowing in.In the ZM2376 LCR table, the specialized fixture can supply the required DC current to the sample and maintain a stable load for an extended period.
Frequency Characteristic Measurement
ZM2376 measures one frequency point at a time. By using random application software and Excel spreadsheet software, it is possible to measure inductance frequency characteristics and display the DC current vs. inductance quantity curve on a PC. Up to 10,000 measurement points can be set. The factory line can be set up for automated testing, or we can configure according to your testing requirements.
Measurement Data
Actual Measurement Examples
Component Equipment
NF LCR Meter
ZM2371/ZM2372 (≤100kHz)、ZM2376 (≤5.5MHz)
DC Bias Adaptor (Custom Product)
DT-ZM01 (for ZM2371/ZM2372 only), DT-ZM02 (for ZM2376 only)
DC Current Overlay Unit (Custom Product)
This is forThe LCR unit with external DC current bias function. By connecting this device to the DC bias adapter and LCR tester, parameters with DC bias (combined voltage or current bias) can be measured. During DC bias, up to 6A of DC current is applied to the sample from the Chiyoda DC constant current source.
Direct Current Bias Current6A
By configuring the DC current superimposition unit, you can customize the effective measurement frequency range, inductance range, and additional error range.
Additional Error
(Reference Value)
Application:
In addition to the above DC bias, we also offer the capability for high-signal AC measurements, catering to our clients' needs. For instance,60V 100A AC measurement signal.
