DC bias source test system MICROTEST 6632S+ Series

DC bias source test system MICROTEST 6632S+ Series from manufacturer MICROTEST supports Equivalent Circuit Analysis with seven different models to assist customers in analyzing the impact of parasitic components on impedance/frequency.The system supports magnetic saturation current and temperature rise current scanning analysis, providing research and development engineers with fast and accurate current curve variations.

I. Specification of DC bias source test system MICROTEST 6632S+ Series

• DC bias source test system MICROTEST 6632S+ Series is bias current test system combines the impedance analyzer 6632S with a DC bias source.
• MICROTEST 6632S+ is capable of analyzing the saturation characteristics of inductors, coils, ferrites, and magnetic cores.

Main features of MICROTEST 6632S+:

• Current and frequency graphic scanning analysis
• Temperature-rising scan function can solve the problems of overheating a DUT to burn
• DCR Measurement function
• Long-term consecutive maximum power output
• Interchangeable bi-direction current function
• Frequency response 100Hz-10MHz (With DC Bias Current 6223/6243), 100Hz-30MHz (With DC Bias Current 6225)
• DC Bias Current Max.320A (6243)
• Direct handler interfaces control through LCR power meter.

Applications of 6632S+ Series:

• Components: High current power inductor, common mode choke, mini molding choke, high power components of EV charging connector
• Electric Vehicles: Electric supercharger system.

II. Key Features of DC bias source test system MICROTEST 6632S+ Series

How DC bias current helps inductor testing?

• Ferromagnetic materials (like iron) are composed of microscopic regions called magnetic domains. The stronger the external magnetic field H, the more the domains align, yielding a higher magnetic flux density B. Eventually, The magnetization remains nearly constant, and is said to have saturated. The domain structure at saturation depends on the temperature.

What is magnetic saturation?

• In electronic circuits, transformers and inductors with ferromagnetic cores operate nonlinearly when the current through them is large enough to drive their core materials into saturation. This means that their inductance and other properties vary with changes in drive current. In linear circuits this is usually considered an unwanted departure from ideal behavior.

Isat & Irms:

• Magnetic saturation current is called Isat, and the temperature rise current is called Irms. When the transformer and the inductor pass a large current in the actual circuit operation, the magnetic field of the magnetic core will produce magnetic saturation, which will cause the inductance characteristic to decline.
• Therefore, the R&D engineer will set the current value of the inductance reduction allowable range.

• Isat (Magnetic saturation current curve).

• Irms (Rated current curve).

Reduce self-inductance:

• Using a DC Bias current source to apply a 200A bias current to the inductor, the inductance decreased from 2.06983uH to 1.02845uH.

Equivalent circuit analysis:

• MICROTEST 6632S+ has seven different models, combine with different types of parameters ( R, L, C) help customers model the impedance versus frequency characteristics and self-resonant frequency (SRF).

Magnetic Material Test (FX-0000C8):

• SUsing the magnetic material test fixture for measuring of permeability of various toroidal cores or ferrite cores and electromagnetic shielding coating materials, 6632 built-in formula to directly calculate the permeability coefficient value μr.

List mode:

• 50 groups of list mode setting (Each group contains up to 15 steps).

III. Model of DC bias current test system MICROTEST 6632S+ Series

Technical specifications of DC bias current test system MICROTEST 6632+ Series

TCompitable with the impedance analyzer 6632S Series:

6632S measurement parameters:

System: