Probably worth reading some of the reviews"
https://www.amazon.com/HY-HUANYANG-Variable-Frequency-Converter/dp/B07HDYX25C?th=1
3.0 out of 5 stars 25% Failure Rate out of the Box
Reviewed in the United States on December 1, 2018
Size: 220V power inputColor: 2.2KWVerified Purchase
I've used about 100 of these VFDs over 5 years. About 20% - 25% don't work right out of the box. HOWEVER, those that do work, do work pretty well and only 1 failure of the 100 or so after being put into service. SO they do work but its frustrating to get a dud right out out of the box.
2.0 out of 5 stars Works
Reviewed in the United States on June 23, 2018
Size: 220V power inputColor: 2.2KWVerified Purchase
I have 3 of these that work well, Actually, I now have 4 of these. I bought 2 six months ago for a G0602 cnc lathe project. One of these recently failed while I was programming it before i event attempted to power the motor. Dead Short across terminals 1 & 3. Tripped 3 breakers including a 50 amp sub panel. So the 25% failure rate is still accurate. . If anyone from Amazon or Huanyang actually reads these, contact me if I have any recourse for compensation
As I indicated, everyone has a different experience of what worked and didn't work, but typically the N (units studies) is very small. All VFD's will fail at some point, and the technology is continuously changing and they are built to different price points and features. There is also a big difference as the application and duty cycle, it it is used occasionally or 24/7. So one chooses accordingly and to the price point you want. Most of these are disposable if something goes, until you get into the larger more expensive units which are designed to be rebuildable. The most common mode of failure these days are the capacitors, in particular if the unit has been sitting on the shelf for a long period of time. My N so far is probably in the 100's, but all of this is relative because I do not do industrial work. I do participate in other forums, so some of my comments are based on what others have documented.
Where I tend to disagree with some of the comments above is the understanding an ease of programming. My first couple of VFD systems took me months to design and fine tune the programming parameters, and even on some recent Yaskawa VFD systems I am still fine tuning parameters months after the install. These parameters significantly differ between the type of machine and the motor characteristics. So there is a learning curve and most people can get it to work, the question is how much time do you want to spend figuring it out and is it safe. Do you understand that hitting the E-Stop may or may not quickly stop the machine based on the program parameters you used. I had this with my lathe the other day.
If you want to put some marginal VFD on a mill, no problem. Work on some machines that have more momentum or interlock safety features, and have a smaller safety margin, well do it at your own risk. I have no issues with going cheap, but I can't tell you the number of people I have had to help with these types of VFDs, and for newbies it is not as straight forward and often just getting the wiring correct is a major hurdle. Nothing against learning, but helps when you have a starting point and one reason why we share our experiences. Nothing is absolute, just shades of grey.
