I'm reviewing a set of inductors for the Experimenting with Magnetic Components design challenge.
Because it's a design challenge, I'd like to start with a working product. A switch mode DC converter.
It's one of the standard circuits: the boost converter. A design that increases a DC voltage.
Post 1#: Introduce yourself and explain what experiments you plan to perform
I live in Schaerbeek, Belgium and have studied electronics, measurement & control techniques, and information systems.
My theme is "grow the love for inductors as LAB project building block".
Back to the story:
image: Bourns 1MH inductor with candidate MOSFETs
The datasheet is available on element14. All info is taken from that document.
image: the specifications of the 1mH inductor
Measurements on the component in my kit:
The datasheet did the measurements at 252 KHz. I'm doing them at the maximum setting of my meter: 100 KHz.
The meter (comparable with GW INSTEK LCR-916) was calibrated before the measurements.
Results (f = 100 KHz)
D: 0.009 (1/Q)
ESR: 5.64 Ω
The Boost Converter Calculations
I'm using the most common boost converter design. Adafruit (and others) posted a calculator online.
I used that, and changed parameters until the design matched the 1 mH inductor.
image source: calculation done with the Adafruit boost converter calculator.
Whe in I use a switching frequency of 72000 Hz, the calculator suggests exactly 1 mH.
Texas Instruments has an application note on the calculations.
Coursera has an excellent Power Electronics course, from U of Colorado Boulder.
Hang on while I'm starting the build.