Nice low impedance

Oct 27, 2017 4 Replies
T

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T106-26 core, 10 turns quadfilar 16 AWG.



Since the application is a dual inductor, that should have low leakage, and uses doubled up wires for ampacity, I figured I might as well wire them as "star quad".



TDR shows 5ns (reflection, actual length 2.5ns), and 13.85 ohms. Nice and low.



I started with about a half meter of wire, so 2.5ns is 2e8 m/s, or a velocity factor around 0.67. Not bad for generic Soldeaze insulation and crummy air gaps.



Tim


Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: https://www.seventransistorlabs.com/
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W

Coupled inductor: Rdc and inductance?

Thanks, - Win
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T
9.2uH (per winding), Rdc is whatever a quarter meter of 16 AWG has.

Rac is far more significant. Those yellow-white #26 cores are s*it. But that's fine in my application, for once!

Let's see, 2.5ns of 13.8 ohms at c = 0.67 c_o, is about 5nH. Suspiciously low leakage for half a meter of anything! If that's right, then k =

0.99973.

Tim

-- Seven Transistor Labs, LLC Electrical Eng>>

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B

Nice winding job. Was that hard on the hands ?

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T

Yes.

Tim

Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: https://www.seventransistorlabs.com/
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