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Buying advise for a 2 quadrant benchtop Power supply
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artag:
HP/Agilent 6632B is two-quadrant for 5A 20V.
There are other models in the same range with higher ratings (I'm assuming they're also two-quadrant but you should check).
They can be ganged into four-quadrant.

The 6632A is, I think, also two-quadrant and about half the price secondhand. But you lose the front-panel twiddle knob and the nice green VF display (it's got an LCD). Perfectly fine if you're driving it remotely.

I realise you're probably expecting to buy new but these are excellent value.
artag:

--- Quote from: jc101 on November 02, 2023, 05:51:36 pm ---Note the software licence to actually do the Battery stuff is extra and a subscription model.  The BenchVue App works on Windows 10, if you are on Windows 11, save your time and don't bother installing it. 

If you have an SMU to make battery models, there is the Keithley 2281S-20-6, if you can take the fan noise.

--- End quote ---

I didn't know it relied on external software. What does the battery stuff do beyond source/sink ?
alm:

--- Quote from: artag on November 02, 2023, 08:47:50 pm ---HP/Agilent 6632B is two-quadrant for 2A 50V.
There are other models in the same range with higher ratings (I'm assuming they're also two-quadrant but you should check).

--- End quote ---
If you're talking used, then indeed the other HP/Agilent 663xB and 663xA models are also two quadrant (the 663xA have a rather high minimum sink current, though). The HP/Agilent 66332A was marketed as a battery simulator (more measurement functions like measuring peak current and high speed sampling of the current with high dynamic range), and the HP/Agilent 66312 A/D and 66319 A/D units were similar but lower power and with a fixed sink current. Keithley also had battery simulators in the 230x series (2302/2304/2306/2308), but probably all those half rack units would be too low power. If the company budget does not stretch for a new unit, then maybe a used HP/Agilent/Keithley unit from a reputable used test equipment seller (if they still exist) would be an option.
jc101:

--- Quote from: artag on November 02, 2023, 08:49:08 pm ---
--- Quote from: jc101 on November 02, 2023, 05:51:36 pm ---Note the software licence to actually do the Battery stuff is extra and a subscription model.  The BenchVue App works on Windows 10, if you are on Windows 11, save your time and don't bother installing it. 

If you have an SMU to make battery models, there is the Keithley 2281S-20-6, if you can take the fan noise.

--- End quote ---

I didn't know it relied on external software. What does the battery stuff do beyond source/sink ?

--- End quote ---

The PSU and Load can be used directly from the front panel.  When you fire up the Battery Emulation software, the front panel just shows "Battery Emulation", and it's all remote controlled. 

The software lets you profile a battery, record the ESR etc., and you can then load those back up and emulate the battery with the required ESR.  That is bi-directional, so you can discharge and charge.  You can also cycle batteries, so test how they perform over several cycles.

I think it also supports taking a battery profile and enabling multiples in parallel or serial, though I didn't check that out (see below).

I wanted to replace my 2281S-20-6 with one, as I can't profile on that.  It will only discharge batteries at a fixed 1A rate.  The Electronic Load is also handy.  I have one but sometimes could use two.  I couldn't get it to work, only to discover that my office/lab PC is Windows 11, and the BenchVue suite is unsupported on anything other than Windows 10.  Keysight isn't planning to make it compatible, from what I gather.  So the demo unit is boxed up ready to ship back.
alm:

--- Quote from: jc101 on November 02, 2023, 09:16:55 pm ---I wanted to replace my 2281S-20-6 with one, as I can't profile on that.  It will only discharge batteries at a fixed 1A rate.  The Electronic Load is also handy.  I have one but sometimes could use two.  I couldn't get it to work, only to discover that my office/lab PC is Windows 11, and the BenchVue suite is unsupported on anything other than Windows 10.  Keysight isn't planning to make it compatible, from what I gather.  So the demo unit is boxed up ready to ship back.

--- End quote ---
Surely given the price of that unit you can afford maintaining a dedicated lab PC with Windows 10, or buy a Windows license to run Windows 10 in a virtual machine?
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