AC to DC Buck Converter

I am using this Drok 115VAC to 24V 20A variable power supply, along with a YaeTek 24V DC 350W Permanent Magnet Electric Motor, to drive my Taig Micro II lathe. Considering this whole kit cost about $80 I'm very happy with the result. While not perfect, the value is so high I have to give it 5 stars. If you've been thinking about one of these motors for your micro lathe I say, go ahead! If you are running the 115VAC Marathon motor that Taig sells, then you know about that motor. It's OK, but the speed range with the 4 step pullies is 430 RPM to 1725 RPM, pretty high for larger parts. And it's big, heavy, and kind of brutish - there is no way you need that much power, nor can it even be transmitted with the stock belt. This DC motor setup runs well down to about 5 volts/570 RPM, which is a lathe speed of 140 RPM. It will go a lot slower, but it sounds a bit notchy. It's happier above 5 volts, and I usually have it set about 16 Volts, which makes a lathe speed of 450 RPM to 1800 RPM. The power supply goes to 28 volts and the motor is spinning at 3200 RPM. This PS has been flawless in this application. It is the voltage regulated only model. Using a "Kilowatt" meter I'm seeing up to about 120 watts in my application. So, about 5A at 24V. The PS seems perfectly happy, and the fan has never turned on. Judging from the motor whine while running the lathe there is a very minor variation in RPM with no load, just a few RPM or small fraction of a percent speed. Under cutting load I've not noticed any significant speed change - it does sound like the system is working harder but that's normal. The motor has plenty of torque for this application. At 7V I have no trouble machining 2" diameter aluminum at a no drama SFM. Once again, the belt is the limitation. The only negative for me is the motor is kind of loud. It makes an ever rising pitch and volume whine as RPM increases. I only use this lathe for occasional small parts, so the noise doesn't matter. If you are doing production, it might get tiresome. Who knows how long it will last. Considering it's intended use as a scooter motor I'm hoping with this very light lathe duty it will last forever.

I got this to kind of use as a benchtop supply. I had a variety of DC motors I needed to test, at a variety of voltages and power ratings. They were intended for battery powered applications, but I didn't have the variety of batteries I would have needed to test them. I looked at actual benchtop power supplies, and they all seemed to top out at about 10 or 11 amps, and were much more expensive. Before ordering this, I hadn't seen anything like this before, although they look to be pretty common. I also bought some leads that I connected to it to make it easy to connect and disconnect what I am powering. It worked perfectly. Provided the voltage range and current I needed and one of the motors, was 24V DC and drew 17.5 Amps, which this provided with no complaints. While I do appreciate the Voltage indicator as a rough guestimate of the voltage, probably "good enough", I did hook up a more accurate meter to set the voltage during my testing. It was easy to get it to within a few 10ths of a volt, but getting it much finer than that took a very delicate touch, but with patience, I could even get it to the hundredths and once there, it would hold it. I see they have another model where it has both voltage and current limit adjustments, and I am thinking I might pick one of those up too.

Not sure at what voltage there is supposed to be 20A of current, but I am finding the limit closer to 2A. Lowers voltage output to cap current. Other than the factor of 10 error on the current spec seems to be a good unit.

This works really well, the adjustment range isn't super precise but you get the full range (mine goes up to something like 27.7V) and the accuracy seems good, when checked with my cheap multimeter it's always within about 0.2V... For the price this adjustable supply has so many possibilities; I'm currently using it to power a ~12V diesel heater with a lead-acid battery backup during the winter from the mower. I set it at 12.7 to 12.9V and it keeps the battery topped off and runs the heater no problem. Only complaint would be that there's no eyelets or anything to mount it, just a few threaded holes for machine screws, but I'm not removing any stars for it at this price!

Power supply works great

Built well, despite getting dropped during shipping, the power supply works, variable DC voltage tests went well. I would definitely buy another one if I needed it.

When I first installed this power supply I forgot to set the input voltage switch to 115V. As a result the power supply delivered *almost* 22.8V when the dial was set to the maximum. This led me to erroneously believe it had poor regulation and I was about to return it and posted a negative review. After having a careful look, I set the input voltage switch to 115V and readjusted the dial. It now delivers the correct voltage and sustains it within the load range I am using it with. So my suggestion is to first have a look at the input voltage switch as it probably comes set to 230V by default in most or all units, which in the North American market is the wrong setting. I have been unable to hear the fan so far, despite elevated temperatures this time of the year, but my application uses less than half the available current. I will update the review if at any time I hear anything unusual.

I absolutely love this power supply. This is the second power supply that I've owned and I really enjoy that I can adjust the voltage with the knob it has held up for you multiple months now and I really appreciate the voltage adjustment switch on the input side too.! Bonus points use the multimeter and the voltage adjustment is accurate. The fan's not noisy. And bonus points it sustained no damage when I accidentally shorted wires due to a bad connection and the wires overheated but the power supply is still a chance

Muy alta calidad

bien satifais

I use this at maximum load for several hours per day. I have used it for a few months now and It works very well.

Es justo lo que me hacia falta

Llega en buen estado, no la uses para dimmear focos de halogeno se puede dañar