GOPHERT CPS-6017 0-60V 0-17A 1000W Real? - Page 1
Forum section: electronics / testgear

author: sn4k3
author_rank: Frequent Contributor
timestamp: October 12, 2017, 02:34:01 am
content: Hello,I come across with this:https://www.banggood.com/CPS-6017-0-60V-0-17A-220V-1000W-High-Power-Digital-Adjustable-DC-Power-Supply-p-1066728.htmlSpecs/Price are unbelievable... Anyone got one of this? Teardowns?Comments confirm that 60v/17a output is realWhat are the thoughts on that?

author: Lightages
author_rank: Unknown
timestamp: October 12, 2017, 03:19:29 am
content: Obviously some simpleton just multiplied the 60V max with the 17A max. It is obvious that both maximums can not be had at the same time. It is probably closer to a 700W max PS. Still not bad for the price IMHO. I might get one. I have been happy with my other Gophert.

author: sn4k3
author_rank: Frequent Contributor
timestamp: October 12, 2017, 04:15:50 am
content: A customer review told he tested with a resistor and it deliver max power, but not sure...Anyway test is better than speculating

author: edavid
author_rank: Super Contributor
timestamp: October 12, 2017, 04:19:31 am
content: Quote from: blueskull on October 12, 2017, 02:42:11 amI think that value was mistakenly copied from the 660W supply datasheet:https://www.banggood.com/CPS-6011-60V-11A-High-Efficiency-Adjustable-DC-Power-Supply-p-1066725.html

author: Lightages
author_rank: Unknown
timestamp: October 12, 2017, 04:39:50 am
content: That could also be another explanation.

author: wraper
author_rank: Unknown
timestamp: October 12, 2017, 06:53:33 am
content: Seems like real, it surprisingly it even uses decent capacitors inside.Quote from: Lightages on October 12, 2017, 03:19:29 amWhy do you make such assumption? Computer PSUs pack up to 2x of power in the same volume + they have tougher task as outputting 1 kW at 60V is easier than doing this at 12V.

author: Emo
author_rank: Regular Contributor
timestamp: October 12, 2017, 07:03:38 am
content: Hi, I do use one and I am still satisfied. The only part that was not ok were the enclosed cables and clamps.In a past post I uploaded some pictureshttps://www.eevblog.com/forum/chat/what-did-you-buy-today-post-your-latest-purchase!/msg1101867/#msg1101867

author: wraper
author_rank: Unknown
timestamp: October 12, 2017, 07:03:57 am
content: Specification from Aliexpress listing:Operation Voltage Range 170 – 264VacOperation Frequency Range 45 – 65HZOutput Voltage Range 0 – 60VOutput Current Range 0 – 17AEfficiency (220Vac/full load) ?89%Full Load Input Current(220Vac) ?5.1ANo Load Input Current(220Vac) ?180mAVolt Meter Accuracy ? 0.3% + 1 digitsCurrent Meter Accuracy ? 0.3% + 2 digitConstant VoltageLoad Regulation (0-100%) ? 30mVLine Regulation(198-264Vac) ? 10mVRipple & Noise (Peak-Peak) ? 30mVRipple & Noise (r.m.s) ? 3mVSet Accuracy ? 0.3% + 10mVTransient Response Time (50%-100% rated Load) ? 1.0msConstant CurrentLoad Regulation(90%-10% Rated Voltage) ? 50mALine Regulation (198-264Vac) ? 20mARipple & Noise (Peak-Peak) ? 30mAp-pSet Accuracy ? 0.3% + 20mASize(width× height× depth) 188×80×238mmNet Weight 3.0KG

author: Lightages
author_rank: Unknown
timestamp: October 12, 2017, 07:14:10 am
content: Those specs look more like the real ones.

author: evava
author_rank: Regular Contributor
timestamp: October 12, 2017, 12:34:04 pm
content: I own for some time CPS-1660 (16V 60A - almost opposite of yours :-)) and works fine.True is, I do not dare to load it fully, e.g. 16V and 60A at the same time. It works for short time, then starts to be hot and I always interrupt the experiment

author: sn4k3
author_rank: Frequent Contributor
timestamp: October 12, 2017, 01:04:06 pm
content: More than output current and voltage i think the most important is the stability and ripple.There also another PSU that looks better build with normal specs:https://www.banggood.com/DPS305CF-30V-5A-DC-Digital-Control-Laboratory-Adjustable-Power-Supply-p-932355.htmlWold like to see one of this with profiles

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 12, 2017, 01:24:45 pm
content: I have a couple of the smaller Gophert units and they're pretty reasonable, and very small & light so ideal if you need to carry somewhere. UI isn't great but they seem to work OK and build quality is reasonable.Main annoyance is that terminals are on the back, but smaller size makes up for this.

author: SkyMaster
author_rank: Frequent Contributor
timestamp: October 13, 2017, 02:55:15 am
content: On Gophert website, the specification is:Full Load Input Current(220Vac) <= 5.1Ahttp://gophertc.com/en/node/84

author: Mr.B
author_rank: Unknown
timestamp: October 13, 2017, 03:09:53 am
content: I have a GOPHER CPS-3232.Adjustable 32V, 32A SMPS.I don't use it as my everyday bench PSU, I have a Tektronix PWS4205 for that.However, when you want some serious current it is rock solid.I took mine apart when I first got it to do the standard safety checks. The build quality is pretty decent.

author: wraper
author_rank: Unknown
timestamp: October 18, 2017, 10:01:01 am
content: Youtube suggested me a video (Russian). This PSU has 92% efficiency and 0.99 power factor at max load and was running fine for 6 hours under 1050W load.

author: Ivan7enych
author_rank: Regular Contributor
timestamp: October 18, 2017, 11:59:26 am
content: Hello, here is my review (in russian)-1:14 - voltage drop at 10A load2:00 - voltage accuracy at several points2:30 - voltage indicator has some error at < 2V (the output voltage itself is correct)4:25 - transition from no load to 5A load5:00 switching noise with and without load5:20 - thermal picture of components6:42 and 7:35 - current transition from 0 to 2A on a short circuit (0.1om 4wire resistor load) - with spikes up to 6A8:33 - the same experiment (current transition from 0 to 2A on a short circuit ) on a Rigol

author: nctnico
author_rank: Super Contributor
timestamp: October 18, 2017, 12:25:02 pm
content: Doing thermal camera measurements on shiny surfaces.

author: wraper
author_rank: Unknown
timestamp: October 18, 2017, 12:42:15 pm
content: Quote from: nctnico on October 18, 2017, 12:25:02 pmWhich shiny surfaces?I did not see anything like you say.

author: Ivan7enych
author_rank: Regular Contributor
timestamp: October 18, 2017, 01:52:42 pm
content: Quote from: nctnico on October 18, 2017, 12:25:02 pmDo you paint in matte black all board components before inspecting with thermal camera?To explain what I'm talking on video,1. I found an IC heated up to 60degree, tny274gn - looks normal, it doesn't heat more on load2. Found 2 10om big SMD resistors, heated to 100degree (seen on 6:25 labeled "100"), looks like switching ringing dissipation circuit (resistors are connected in series with caps).

author: LaurentR
author_rank: Frequent Contributor
timestamp: March 19, 2018, 03:54:04 pm
content: For reference, as mentioned inthis thread.I have been able to purchase a CPS-6017 with a 110V supply and US power cable by asking Gophert directly and paid USD 220 shipped.I only have a 300W load to test it, but at 300W (25V, 12A), the CPS had no issue. According to my wall power meter, the PF was ~99% and the efficiency ~85% at that point.I also looked at the supply with a thermal camera (Flir One gen 2) and found it very cool except for the already mentioned SMD resitors, which the Flir was measuring up to 130C. Closing the case for a realistic airflow, they were more in the 115C. Still pretty high.Finally, I got a user manual (attached) for those who want to have a look at it.Overall, I think it's a good deal for the price.