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Audio Description – Course 8, Non Sinusoidal Transformer Core Testing
Ferrite Core, N30, EPCOS B64290L0022X830

– Clip 1 Introduction – Clip 2 Course Description – Clip 3 Test Parameters – Clip 4 Test Equipment – Clip 5 Overview – Clip 6 BD437G – Clip 7 BD135-16 – Clip 8 2SC5707 – Clip 9 2N5681 – Clip 10 2SD882 – Clip 11 2N3055 – Clip 12 BUF644 – Clip 13 Calculation 1 – Clip 14 Summary – Clip 15 BD437G SG – Clip 16 BD135-16 SG – Clip 17 2SC57007 SG – Clip 18 2N5681 SG – Clip 19 2SD882 SG – Clip 20 2N3055 SG – Clip 21 Calculation2 – Clip 22 Conclusion – Clip 23 End of Part 4

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In our third test serie we look at the Ferrite Core, N30

We test with the evaluation board 7 transistors. Test is conducted in self-oscillation and signal driven from a signal generator. We also look at the Load, No-Load values.

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Course Description

Non Sinusoidal Transformer Core Testing
for Ferrite Core, N30

– Compare a fixed power consumption to the light level output
– Use many Transistors for the test
– Compare self-oscillation to signal generator driven transistors

 

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Test Parameters

1. One evaluation board with transistors and LED array
2. Ferrite core, N30

 

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Test Equipment
Tools

– EA, PS 2000 B, 84 V 5 A, Power supply
– Agilent/Keysight InfiniVision 3000 Series oscilloscope DSOX3014A
– External 19 Inch Monitor for Oscilloscope
– Gossen Mastersix light meter
– Agilent 34450 A 5.5 digit Benchtop DMM

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We integrate our measurements into the formula

Core, Metglas / Nanocrystal, 120 m SWG22 and 2 X 1.2m 16/02 EQ wire
Reference power value 400 mV and 0.030 A = 0.012 Watt
Load: 5 LEDs in series, 3 Volt 20 mA = 15 Volt and 100 mA = 1.5 Watt

1. BD437G, NPN TRANSISTOR, 26 Hz, 1300 LX
2. BD135-16, NPN TRANSISTOR, 36KHz, 800 LX
3. 2SC5707-E, NPN TRANSISTOR, 31 Hz, 1100 LX
4. 2N5681, NPN TRANSITOR, 74 Hz, 520 LX
5. 2SD882 , NPN TRANSISTOR, 25 Hz, 1800 LX
6. 2N3055, NPN TRANSISTOR, 31 Hz, 1400 LX
7. BUF644, NPN TRANSISTOR, 83Hz, 370 LX

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Summary

The property of the Metgas / Nanocrystal core becomes in the self-oscillation
mode apparent.
The back EMF is almost fully absorbed by the load so that no free resonance
can occur. Only at very low frequency self –oscillation is possible. The Overdrive
is when no resistance is at the base than all current can be drawn from the
source to the load wsiht increased frequency. This core Is perfect for utilising
impulse power and high current. It is also the core of choice for high frequency
and high voltage applications. The performance of the transistors is reflected
from all previous tests.

We move on to frequency driven via the signal generator and Load, No- Load test

 

 

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The End Part 4
Non Sinusoidal Transformer Core Testing

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