VFD Inverter 0.75kw 1HP 5A AC 220V Variable Frequency Drive

Arrived mid-morning. Connected the wires to the 1/2 HP three phase motor and set the Parameters in about 45 minutes. It started the motor and worked perfectly. I am now waiting for the auxiliary start and stop switches and the potentiometer for external control. Sure, makes changing speeds on my 1980 Craftsman lathe easier. I did get help from the guys on YouTube which was a great help.

Purchased this for my recent purchase of a 3 phase wood lathe. Was easy to install and is working fine so far. Haven't used it much yet so don't know about the reliability of it yet. Time will tell.

This VFD is dangerous. The exposed heat sink at the back of the unit is not connected to the ground screw terminal. If something happens and 240 volts is applied to the metal heat sink, in a properly engineered unit the circuit breaker would trip. With this unit, the failure could go undetected until someone touches the heat sink, in which case they could receive an electrical shock.

THE GOOD: - It worked when powered up! - The parameters were preset pretty decently for my drill press. - It is a simple VFD with few settings to worry about but still has the basic features needed. - Far less expensive than big name VFDs. THE BAD: - It is not safe for facemounting without a box/enclosure. This was a big deal for me. I was working with 10 AWG SOOW and my older unit (a Delta) was set up to accomodate with appropriate cable clamps meeting code so the individual conductors were enclosed at all points where the outer jacket was stripped. In order to safely fixt this problem, I had to mount the VFD inside of a UL listed electrical enclosure. - The wire terminals were too small for the appropriately sized conductors. Could I get #10 wire in place? Yes, but it was a job. The terminals have a wire clamp similar to what might be found on a NEMA plug, but it was VERY difficult to get the wire into the clamp without a terminal end. As others noted, the terminals are not big enough to accomdate a forkl terminal much less a ring. I ended up stripping the jacket and soldering the tightlest twisted conductors so no loose strands would create an opportunity for arc or short. THE UGLY: - I remain apprehensive given the comments others have made about the unit failing soon after installation. Only time will tell but it would be nice to have a little confidence in the product.

Works great

This vfd is working great to drive my original motorized power feed on older Bridgeport mill. The only reason I deducted one star is that I’m not sure how long it will last. It does not have a cooling fan, but does have an oversized aluminum heat sink. It will mounted inside a fairly large box with a name brand vfd that powers the mill’s motor (this one has a cooling fan). However, I have installed a computer cooling fan in the bottom of the box with outlet in the door (similar to “Clough42” on YouTube). This should help with cooling both vfd’s and extending the life of both. For occasional use, I think it will be fine. If I needed one for regular daily use, I’d probably step up to a name brand, but for hobby use I think it will be ok. Only time will tell. Btw, I will probably order another one to run a floor model 12 inch grinder that is 3 phase.

saved me a lot of frustration

I installed this on a 3/4 ho 3 phase 240/480v motor on a drill press upgrade. I’ve used it a few times. It works better than expected.