Top positive review
4.0 out of 5 starsNice compact supply, but won't support 7.5 amp motor inrush current even for a half second
Reviewed in the United States 🇺🇸 on February 27, 2023
Unfortunately this unit didn't work for my needs. Doubly unfortunately, I'd scratched it up while testing it so couldn't return it.
I needed a supply for a DC motor powering an X-axis feed on my vertical mill. Using this supply, when I first turned on that motor, it would start up, run for 1/4 second, turn off (due to too high inrush current, so the power supply overcurrent protection kicked in), and then come back on again (as the overcurrent protection automatically reset). By this time, the he motor's coil was still energized so that its inrush current wasn't quite so high, so the power supply overload protection didn't trip again, and so it "worked".
But the on-off-pause-on again behavior isn't something you want from an X-axis mill power feed, so I had to replace this power supply with a stronger one, rated at 10A instead of this one's 6.5A.
Once the motor is moving, it draws a measured 2.5A under load. But its inrush current requirement peaks at around 7.5A just for a half second. Unfortunately, this power supply's overcurrent protection kicks in immediately when its rated 6.5A limit is reached. I can't fault the power supply for this; it's doing it's job to protect your circuitry from more than 6.5A. But again, it wasn't suitable for MY needs. So it'll sit on my spare parts shelf for some time before I may find another use for it eventually.
