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The justification and selection of test equipment for a company lab.

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CM800:
I am going to be working on a new project revolving around the development of a 2 quadrent brushless drive for a customer, (aprox 10,000 per year)

We already have a suitable, Lecroy scope (400MHz, 4 channel)
however we are rather inequipped with other gear.

I have been looking through gear that I think will be needed, I would like a second opinion, as this is a small company I work for we have a limited budget.

For a bench power supply, I was thinking of one of these:
http://www.rigol-uk.co.uk/Rigol-DP831-DC-Power-Supply-p/dp831.htm

As this drive will be around 12V at higher currents (15-25A) would a high current PSU be required or could I make do with a variac power supply?
http://uk.farnell.com/ea-elektro-automatik/ea-ps-5040-40-a/power-supply-1ch-40v-40a-prog/dp/2418749
I suspect that it would not do well due to mains noise and regulation however.

I am unsure how essential a function generator will be for this job, however I was thinking of this one here possibly:
http://www.rigol-uk.co.uk/Rigol-DG1062Z-Waveform-Generator-p/dg1062z.htm#.VlhKbL-vyU0

I imagine I will also need some Oscilliscope current probes, any recommendations?
I don't think a differential probe will be needed due to the low voltage for now.

What other equipment would be recommended?
I am also trying to futureproof thing for future projects, I am a HNC electrical engineering student so I am very much still in the process of learning.
However I have been told I have a better grip then many of my classmates due to several years of hobbiest experementing and learning / reading.
One of my main aim is trying to compile a cost-justified list of test equipment to present to my manager and be able to actually explain why I need each peice and at that specification.

Thanks in advance, any advice and tips would be greatly appreciated.



Fungus:

--- Quote from: TCWilliamson on November 27, 2015, 12:31:03 pm ---As this drive will be around 12V at higher currents (15-25A) would a high current PSU be required

--- End quote ---

Yes.


--- Quote from: TCWilliamson on November 27, 2015, 12:31:03 pm ---or could I make do with a variac power supply?

--- End quote ---
If the motor is fixed at 12V then a variac doesn't make any sense.

What you need is plenty of amps. Get at least double what your maximum expected load will be, ie. 50A or more.

12V @ 50A isn't anything unusual, most PC power supplies can do that and you can get a cheap 50A supply for about $50.

(I'd pay a little bit more than $50 though, just in case).

tautech:
These new FG's are worth considering:
https://www.eevblog.com/forum/blog/eevblog-806-siglent-sdg2000x-arb-function-generator-first-look/
https://www.eevblog.com/forum/blog/eevblog-805-siglent-sdg2122x-arb-generator-teardown/

Ian.M:
If "12V" is a euphemism for powered by a 12V lead acid battery, you will need a power supply that's adjustable up to 15V.   You will also need an appropriately rated dynamometer for the motor horsepower and speed.

Fungus:

--- Quote from: Ian.M on November 27, 2015, 12:52:13 pm ---If "12V" is a euphemism for powered by a 12V lead acid battery, you will need a power supply that's adjustable up to 15V.

--- End quote ---

That's true, I didn't think of that.

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