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Experimenting with Magnetic Components
Blog Experimenting with Magnetic Components - SMD transformers experiment gizmo part 2: Measure
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  • Author Author: Jan Cumps
  • Date Created: 11 Oct 2021 6:24 PM Date Created
  • Views 1227 views
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Related
Recommended

Experimenting with Magnetic Components - SMD transformers experiment gizmo part 2: Measure

Jan Cumps
Jan Cumps
11 Oct 2021

I'm reviewing a set of inductors for the Experimenting with Magnetic Components design challenge.

In this post: measuring a circuit made with inductor #13 of the kit: HCTSM80304BAL-E1 Pulse Transformer, 3:4, 300µHHCTSM80304BAL-E1 Pulse Transformer, 3:4, 300µH

image

 

Schematic

 

In the previous post I showed the build. But didn't give the schematic.

 

image

 

The transformer can handle pulses well.

My input signal is a symmetric square wave at 400 kHz. Ideally, the input should have a series capacitor to remove DC (and avoid saturation) and a resistor (to dampen resonance).

The output are two inverse square waves, each with half wave rectification.

A 22 µF capacitor deals with ripple. The load is 10K.

The circuit is again filtered but unregulated.

 

Measurements

 

Although this can be an isolated design, my probing setup connected the exit winding of the primary with the middle tap of the secondary. Via the probe ground clips.

image

 

At the top of this article, you see all signals.

The second capture are the transformer input and the two outputs:

image

 

Then the two output windings and the DC output voltage over the load:

image

... and the 3 transformer signals and the AC (ripple) component of the load voltage:

image

 

As last, the two output signals interlaced:

image

 

 

Related posts
1. Boost Converter part 1: Inductor and Calculations
2. Boost Converter part 2: Build
3. Boost Converter part 3: Measure the Inductor in action
4. LCR meter experiments
5. SMD transformers experiment gizmo part 1: Build
6. SMD transformers experiment gizmo part 2: Measure
7. Common Mode Choke
8. Make your own Inductor
9. Calculate your own Inductor
10. Boost Converter part 4: Efficiency
11. DIY Inductance Meter
Planar PCB Transformer: GaN Point of Load converter 48V to 1V 50A
Measure Unknown Inductor Value with Function Generator and Oscilloscope
Experimenting with Magnetic Components: About the Competition
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