Electric motor single and 3 phase options?

[Benn]

Its 240v supply ,then inverter to a 3phase motor

 

[Servac]

Is the motor 230/400v? And do you have it wired in delta?

What does the drive display when its running?

Have you set the motor rated current and frequency to 230v and 50hz?

Also the part number in the description is for a 3 phase 400v drive, is that correct? I'm not familiar with that brand of drives, but if it does work on 1ph 230v then it needs to be very over rated for the motor it drives.

 

[Benn]

My brother wired it in ,hes a electrician but hes never came across an inverter,
He followed the wire diagram, so i think its wired in correct,but we couldnt figure out the all the settings,
It automatically seemed to sort itself out and we just press start and it goes.
It says on the read out f50.00 which we didn't set up.does this mean the hz?as the motor is 50hz.
Is there a way to check if the motor is running at the correct rpm?

It could also be the way i have the ducting off the extractor set up but i wanted to eliminate a slow running motor / fault with inverter.

 

[335d]

As mentioned above the part number GA50C4012EBA is for a 3 phase input inverter.
what are you trying to achieve? The fitting of this inverter will allow you to adjust the ramp up time of the motor and vary the speed about +/- 30%.
on your original post you asked about running the motor from a single phase supply. That part number is wrong For that application.

 

[335d]

And has Servac has mentioned, the part number is for a 12kw inverter, but you only have a 4.0kw motor, so vastly oversized.

 

[Servac]

And has Servac has mentioned, the part number is for a 12kw inverter, but you only have a 4.0kw motor, so vastly oversized.

It would need to be overated by that much.

 

[335d]

It would need to be overated by that much.

Edit. Just seen it’s a single phase supply. Surprised it actually works.
Don’t know smooth the dc would be before being inverted to AC Again.
would be pulling near 30A from the input?

 

[Servac]

My brother wired it in ,hes a electrician but hes never came across an inverter,
He followed the wire diagram, so i think its wired in correct,but we couldnt figure out the all the settings,
It automatically seemed to sort itself out and we just press start and it goes.
It says on the read out f50.00 which we didn't set up.does this mean the hz?as the motor is 50hz.
Is there a way to check if the motor is running at the correct rpm?

It could also be the way i have the ducting off the extractor set up but i wanted to eliminate a slow running motor / fault with inverter.

You could buy a tacho off ebay and measure the speed? Non contact or contact type cheap enough off ebay.

Can you put up pictures of the motor rating plate and of the motor terminals and find out what the following parameters are set to Input AC supply voltage
Maximum output frequency
Maximum outout voltage
Base Frequency
Motor rated current
Motor pole count
Motor rated power


Unless you can check/change thease things you have little hope of getting it working properly.

 

[335d]

You could buy a tacho off ebay and measure the speed? Non contact or contact type cheap enough off ebay.

Can you put up pictures of the motor rating plate and of the motor terminals and find out what the following parameters are set to Input AC supply voltage
Maximum output frequency
Maximum outout voltage
Base Frequency
Motor rated current
Motor pole count
Motor rated power


Unless you can check/change thease things you have little hope of getting it working properly.

look at post 1. It’s a 4kw 3 phase motor,
originally wired in Star as expected.
Hopefully its been rewired in delta as suggested. A photo would confirm

 

[Deutzdx3]

one of these are what you need. 240vac in and 240vac 3phase our. Run the motor in delta and it’ll be perfect. Make sure the motor is 240/440v motor.

 

[Benn]

this is it set up

This is how its wired up

this is when i turn the power on to the inverter it comes up with f 00.00

Then i press lo/re and it changes to f 50.00

then i just press the green button/run and it starts up the dust extractor ,

it starts not instantly but gradually within 2-3 seconds its up full running speed.



This is a picture of the motor its powering

 

[335d]

can You post a picture of the motor wiring in the terminal box? Did you change it to delta as suggested as you are now powering the motor with 240v three phase and not 415V three phase as before.

Can you also confirm the yaskawa part number?

 

[Benn]

I will have a look later on today and get my brother to confirm if it is delta,

here is all the info on the inverter

Cheers for all the help so far

 

[Benn]

Here is the motor wiring,

 

[Servac]

You need to re wire the motor to Delta. With the three lings going in parallel, and a red wire connected to each as per the diagram in my earlier post. If it turns the wrong way afterwards, swap any of the two red wires over.

 

[Servac]

 

[Benn]

Ah cheers!
Will get brother to do it tonight,

So is the way the motor is wired currently is star?
What is the issue with it wired as it currently is,is it that the motor will run slower?
I dont know alot about this sort of stuff ,
It be good to understand the reasons why its incorrect.
Cheers again for help!

 

[Servac]

Ah cheers!
Will get brother to do it tonight,

So is the way the motor is wired currently is star?
What is the issue with it wired as it currently is, is it that the motor will run slower?
I dont know alot about this sort of stuff ,
It be good to understand the reasons why its incorrect.
Cheers again for help!

3 phase is normally 400v which is how the motor has been wired to run, but when you run an inverter from a 230v single phase supply you get 230v 3phase out, which means that the motor would only run at 2/3 of its rated power. By rewiring to delta it will run on 230v 3 phase at its full power rating.

 

[335d]

I will have a look later on today and get my brother to confirm if it is delta,

here is all the info on the inverter
View attachment 940275View attachment 940276View attachment 940274

Cheers for all the help so far

That is the correct inverter for single phase in. As Servac said, wire the motor in delta and you'll be good to go. There will be two of these connector bars on top of each other in the current wiring, just incase you think you don't have enough.

 

[335d]

While he's at it, if you have a nut for the flexible conduit, it would be a good time to fit. Would tidy it up.