Quick question 3ph motor wiring

T

Toolferone

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Mar 22, 2015
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I will be using this motor on a VFD. I just want to be sure I am reading the motor plate correctly. It will be 220 volt. Thanks

4, 5 & 6 will be wired together and stay in the motor box.

7 & 1 will be 1 leg

8 & 2 will be 1 leg

9 & 3 will be 1 leg

 
Already answered but you got er , what kind of vfd are you installing? Don't forget to install a 3 phase reactor on the line side of your drive to eliminate harmonics. It's a viable way of limiting current and filtering waves ... Wouldn't wanna burn a vfd or motor
 
As far as a vfd, just going to use 1 of the cheap Chinese off eBay. I am really scrounging every last penny of side money to make the grinder and have to build in stages as money comes in. I have been reading on 3ph motors and vfd's for couple weeks now and you are the 1st person to even mention a 3ph reactor. I had never heard of them till now. I don't see where anyone off youtube has talked about or used one. I would love to hear more of your thoughts on them and why no one else has?
 
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As far as why no one else has them I can't explain. Every VFD in our crusher , pellet plant , concentrator and equipment including our mobile CAT Mobile generator generator has an inline reactor , a VFD produces harmonics and harmonics are bad.
 
It's quite long to explain but just do a quick read on none linear loads and harmonics caused by a variable frequency drive.
 
grumpy_grinder said:
Don't forget to install a 3 phase reactor on the line side of your drive to eliminate harmonics. It's a viable way of limiting current and filtering waves ... Wouldn't wanna burn a vfd or motor
Click to expand...

No, you wouldn't want to burn something up, but I'm not sure there is much risk of that.

I think big facilities run these to keep from introducing noise into the lines and to meet certain utility requirements. For a person running a VFD at their home for their grinder, a reactor might be an unnecessary expense that I'd hold off on unless there is a problem such as excessive heat, tripping breakers or excessive motor noise etc.
 
Nathan's pretty much covered it.

Harmonics and Electro-Magnetic Interference used to be a fairly serious problem, but technology has moved on quite a lot over the last 20 years or so. It seems very unusual to encounter problems now: pretty much everything you plug in now has a Switch-Mode Power Supply (whatever you are viewing this on, almost certainly has one). SMPS also have the potential to cause serious Harmonic distortion, but it is seldom a problem in reality.

We tend to have short cables between our motors and VFDs compared to industry and tend to have considerably less sensitive instrumentation about. The stuff we do have (the temperature sensing and control system on your HT oven, for example), is designed to be immune to the levels of harmonics and interference likely to be encountered in a consumer environment.

I've built 6 of the cheap HuanYang drives into IP65 enclosures (equivalent to NEMA4) and 4 of them are out with other people, running grinders. None of them have had any trouble at all with either Harmonics or Interference.

I've worked on the basis that I'll retro-fit a filter or line reactor if there are any problems, and have left space in the enclosure to do this. I don't see any sign of needing to.
 
Until you get well over 100 ft, more like 200+ ft between VFD and motor you won't have to worry about a reactor.
 
We installed one on our J head cnc machine vfd controller, we were trying to eliminate line noise bleeding to control wiring. Don't know if this was it, but after installation the problems stopped. It might have been the shop genie just as easily. :eek:

Fred
 
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