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kraken

@lemm.ee

kraken 9 points 3 years ago

You could ask lemmy! :D

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kraken 6 points 3 years ago

You could get an output, but if you want to take 100Vdc and turn it into 10Vdc.. it will not do this... for this you will need a buck, sepic, buck-boost, cùk, resonant, or some other converter..

In the case of the rectifier:

if you look at a simple AC to DC converter (half-wave rectifier) either output = 0 volts or output = input - conduction losses, depending on how you polarized the DC source.

In another circuit (full wave rectifier), the diodes will be polarized such at two will allow current flow. output = input - conduction losses

If the rectifier is something more complex (12 pulse rectifier).. this circuit relies on transformers. If you put DC on the primary of the transformer then the output will be 0 volts and thus the rectifier output will also be 0 volts. In this example I've ignored the fact that the transformers have 3 terminals and the DC source would only have 2.

I'm less knowledgeable of more elegant rectification methods (such as active rectification)...

Interestingly.. the fundamental DC to AC converter (inverter) is the same circuit as the full wave rectifier, with the diodes replaced with controllable switches (SCRs, IGBTs, IGCTs, MOSFETs, ect.)

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kraken 4 points 3 years ago

I'm surprised that anyone wouldn't have known..

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kraken 4 points 3 years ago path: 0 230986, hotness: undefined, score: 4, children: 0
kraken 3 points 3 years ago

Good explanation.

As @directive0 said, the diodes (triangles in the above circuit) only conduct in one direction.

On the AC wave (top left) in the positive half, two diodes are conducting. In the negative half, the other two diodes are conducting.

The two sets of diodes are connected so that the positive half and the negative half of the sine wave come out on the same line. Since the waveform on the right of the image is all positive (ignore the bumps), it is considered DC.

a photo is worth 1000 words

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kraken 3 points 3 years ago

Knowing my track record for completing projects.. turnkey is probably best for me. Haha

Seeing a loooot of recommendations for Synology

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kraken 3 points 3 years ago

Oh thats really interesting. I'm reading about the energy band model right now and you saying that the grid is more closely packed tied it together for me.

The bandgap is too large to be practical, i guess.

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kraken 2 points 3 years ago

Thanks!

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kraken 2 points 3 years ago

You can tell she had no idea what to expect. haha

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kraken 2 points 3 years ago

You caught me. Never worked customer support a day in my life!

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kraken 2 points 3 years ago

Scandalous

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kraken 2 points 3 years ago

Definitely a good call

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kraken 2 points 3 years ago

Thank you!

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kraken 2 points 3 years ago

I love it when my cat sleeps on my desk by me. It's the perfect height to smother my face into his belly.

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kraken 2 points 3 years ago

I roasted a chicken just last weekend :)

What was your rub?

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kraken 2 points 3 years ago path: 0 422605 440724 446048, hotness: undefined, score: 2, children: 1
kraken 2 points 3 years ago

Looks like she's got some thighs on her 😍

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kraken 2 points 3 years ago

Can you link something that explains this more?

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kraken 1 point 3 years ago

Thanks! Seems like a lot of people (both here on lemmy and elsewhere) recommend synology

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kraken 1 point 3 years ago

Haha, I forced myself to eat them as punishment.

Some of them were overcooked... others were like apples. SHAME!

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thanks for using Leebra!

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