inverter 3 phase, to 1 phase - Page 1
Forum section: electronics / projects

author: 0db
author_rank: Frequent Contributor
timestamp: August 20, 2020, 02:50:58 pm
content: hi,I have just received a 3 phase inverter, the cheap chinese kind of stuff you can get with low cost CNC. Nothing special. Just the manual is not reporting any wiring diagram.It says "if the single phase meets two willfully". But it's not clear if and how I can connect 1 phase 220VAC to the 3 phase inputs.any enlightenment?Sorry for the silly question, but this kind of stuff is not my working field

author: langwadt
author_rank: Super Contributor
timestamp: August 20, 2020, 03:13:29 pm
content: https://www.cnczone.com/forums/spindles-vfd/117782-huanyang-chinese-vfd-settings-manual.html

author: 0db
author_rank: Frequent Contributor
timestamp: August 20, 2020, 04:02:41 pm
content: Quote from: langwadt on August 20, 2020, 03:13:29 pmyup, that's the manual, but it's not clear how I ought wires to a single phase.The three phase has 3 inputs: [ R, S, T ]Do I have to connect, for instance "R" to the 220V phase, and "S" to the 220V neutral? Keeping "T" unconnected?

author: Kjelt
author_rank: Super Contributor
timestamp: August 20, 2020, 04:22:28 pm
content: Yes just connect it to the R and S input.If you wonder how I know see pictureThe most difficult part is to set all the hundred parameters correct for your spindle motor.Wrong parameters can really burn your motor, seen that happen on our dutch cnc forum, a $4k ATC spindle went up in smoke just because some wrong parameters.If you want to experiment There is some way of using three 500W halogen lightbulbs in that case in case of shorts Or too hig amps it will light your bulbs instead of the motor. But I do not know exactly how that protection works,it could be as simple as putting them in serie with your VFD outputs, but I have to check with the guy that did that on the other forum if you are interested. Or someone with motorknowledge here could help.

author: Kjelt
author_rank: Super Contributor
timestamp: August 20, 2020, 04:27:02 pm
content: Oh yeah check in the manual your typenr if vfd matches the single or three phase 230V version.There are also three ohase 380V versions, that will not work then.

author: langwadt
author_rank: Super Contributor
timestamp: August 20, 2020, 09:58:11 pm
content: Quote from: 0db on August 20, 2020, 04:02:41 pmthere was a picture,http://www.jinlantrade.com/Stock%20files/0008.jpgI assume "if the single phase meets two willfully" is chinglish connect to any two of the phases

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 20, 2020, 10:35:36 pm
content: Beware that unless specifically specified, the power rating will likely be reduced when running on single phase.

author: schmitt trigger
author_rank: Super Contributor
timestamp: August 20, 2020, 10:52:52 pm
content: Gotta love those Chinese to English translations.But these are no different from the 1960s Japanese to English translations.Hilarious.Unless you are the maintenance engineer tasked with making sure that a mission-critical machine is up and running. Today.

author: langwadt
author_rank: Super Contributor
timestamp: August 20, 2020, 11:35:30 pm
content: Quote from: NiHaoMike on August 20, 2020, 10:35:36 pmyeh, usually close to a factor of two. Not only does all the current come from one input instead of three, the ripple on the input cap is much higher