In actual circuits, power inductors for vehicle electrical equipment and inductors for photovoltaic inverters are used, with DC currents superimposed on the inductance. The inductance is measured with AC signals before manufacturing. However, when DC voltage is applied to the inductors, the inductance value decreases due to reduced permeability and magnetic saturation, deviating from the designed value. When inductors are used in circuits with DC current, the DC bias must be included in the inductance measurement.
LCRCombination of a table and a DC current superimposing unit
Power Inductors with DC Bias Measurement
Please provide the Chinese content that needs to be translated into American English. Subject:
Power inductors for automotive applications and large inverters can handle DC currents ranging from tens to hundreds of amperes. Generally speaking,LCRThe table cannot directly measure the inductance of components with DC bias.
Solution
Through integratingLCRCombined with a DC current superimposition unit, the meter can measure superimposed currents up to100AOur inductors allow for the measurement of inductance in automotive and inverter power inductors under near-real operating conditions.
Combined Equipment
Utilizing a DC bias current unit developed by Li Gao Datong in conjunction with a Chiyoda constant current source, to prevent the influx of DC current.ZM2376 LCRTable, The specialized fixture can supply the required direct current to the sample and maintain a stable load for an extended period.
Frequency Characteristic Measurement
ZM2376 Measure one frequency point at a time, by using random application software andEXCELSpreadsheet software capable of measuring inductance frequency characteristics andPCNo Chinese content provided.DCElectric CurrentVSInductance curve, measurement points can be set broadly10000No Chinese content provided.
Measurement Data
33μHMeasurement Example of Inductors
Component Equipment
NF LCRTest Instrument
ZM2371/ZM2372 (≤100kHz)、ZM2376 (≤5.5MHz)
Direct Current Bias Adapter (Custom Product)
DT-ZM01(For use onlyZM2371/ZM2372）、DT-ZM02Applies only toZM2376）
DC Current Overlay Unit (Custom Product)
This is forLCRUnit for external DC current bias function. By connecting this device to a DC bias adapter andLCRTest instrument, capable of measuring withDCOffset parameters (voltage or current bias combined), applying up to from the Chiyoda DC constant current source during DC biasing100ADirect current.
Direct Current Bias Current100A
By configuring the DC current superimposing unit, it is possible to customize the effective measurement frequency range, inductance range, and additional error range.
Additional Error (Reference Value)
Varying inductance measurement ranges
FrequencyVSInductor FrequencyVS Offset Current
Application:
In addition to the above DC bias, we can also offer AC measurement capabilities with high signals, tailored to customer needs. For instance,60V 100ACommunicate measurement signals.
