DC bias current source MICROTEST 6240 (40A)

DC bias current source MICROTEST 6240 (40A) with 6632 Impedance Analyzer has a frequency range of 100Hz-3MHz and can handle a maximum output current of 320A using 8 units.

I. Specification of Bias current source MICROTEST 6240 (40A)

• DC bias current for saturation MICROTEST 6240 (40A) is designed for performing magnetic saturation current (Isat) and temperature rise current analysis (Irms) on inductors.
• It provides a single output current of 40A. To conduct such analysis, you have the option to purchase the system along with the 6632 Impedance Analyzer.

Main features of MICROTEST 6240:

• 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:

• 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 current source MICROTEST 6240 (40A)

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.
• Magnetic saturation current is called Isat, and the temperature rise current is called I rms. 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.

Option 6632+6243 DC bias curretnt test system:

• Supports magnetic saturation current analysis measurement function.

Isat (Magnetic saturation current curve):

Irms (Rated current curve):

Control 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 (Option):

• It 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 Fixture (FX-0000C8):

• Using 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. System selection MICROTEST 6240 DC bias source

Technical specifications of DC bias current source MICROTEST 6240 (40A)

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