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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 17th Aug 2016, 7:09 pm   #41
Al (astral highway)
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Default Re: Phase lag/ lead considerations?

Ahah, yet this is only a real problem with a giant inductive load used continuously. In this case, a phase correction can be achieved capacitively. The experts here can tell you much more about how much of a problem this may be, but it's definitely rather off-topic
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Old 17th Aug 2016, 8:02 pm   #42
GeoffK
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Default Re: Phase lag/ lead considerations?

Not sure this is entirely right, even domestic fridges have power correction capacitors, but as you say it is OT
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Old 18th Aug 2016, 9:16 am   #43
ms660
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Default Re: Phase lag/ lead considerations?

I did a calc. using a standard formula and an online arctan calculator, that also came to 87 (87.302) degrees.

Making or sourcing the inductor might be a challenge?

Out of interest what is the power supply going to feed?

Lawrence.
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Old 18th Aug 2016, 11:19 am   #44
Al (astral highway)
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Default Re: Phase lag/ lead considerations?

Quote:
Originally Posted by pwdrive View Post
Making or sourcing the inductor might be a challenge?
Hi Lawrence, glad you converged on the same result, although for me, thinking clearly through the process behind this was far more interesting.

I don't think it will be difficult to source a suitable inductor. I may have to put a few of them in parallel but in the past, I've found 10A candidates fairly easily.

Quote:
Originally Posted by pwdrive View Post
Out of interest what is the power supply going to feed?
It's tagged for a couple of induction-based projects, including a very large Tesla coil (my second valve-based model, so no great excitement behind this, the results are familiar) for which I've already amassed/ hand-built most of the components. I'd rather build this with a completely separate power supply -/ which needs to be attached to the unit under operation - so that nobody untrained can ever come along and just fire the thing up out of curiosity.

I'm aware of the rather culty reputation of Tesla coil projects and am not attracted to any of the sometimes fantastical and sometimes silly theories that surround the inventor, although I do respect his genius and as a contributor to polyphase power generation and distribution, in particular. I'm rather narrowly interested in the nature of plasma pathways and, as a photographer, documenting these too. I definitely don't want this thread to wander off into this direction, however.

This power supply will have a few safety interlock features, also. I'm aware that the rectifier has a distinctive and possibly wonderful appearance under load, so the visual impact is highly relevant to me.

It's also important for me to consider quite deeply all aspects of the electronic and mechanical design, even if the circuit is on the surface seemingly trivial.
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Last edited by Al (astral highway); 18th Aug 2016 at 11:27 am.
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Old 18th Aug 2016, 5:16 pm   #45
ms660
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Default Re: Phase lag/ lead considerations?

Cheers for the overview.

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