VFD protection filter etc.

[mactec54]

That makes sense. I would still like to know how to pick the right ones for my setup. There is formula in the attachment that mactec posted.

240/20=12ohms 3%x12ohms=0.36ohms

'Your drive distributor should be able to help you size a reactor for use with a drive. If you wish to calculate
the value yourself, the following example may be helpful. If a 3% reactor was required for a 100 amp 480
volt drive, a 100 amp or larger current rating would be required. The drive impedance would be: Z=V/I or0
480/100 = 4.8 ohms. 3% X 4.8 ohms = 0.114 ohms inserting this 0.114 impedance in the equation for
inductance we get a value of about 300 Microhenrys.'

You also have to make sure that it is suitable for your spindle, which in your case is 300Hz, and does not have Power Factor correction built into it, if it has Power Factor Correction it will lower the performance of your spindle

[mactec54]

So are you saying its not necessary to have a line reactor?

As I said it in one of the other posts, you have to look at the cost and your spindle cost, is it beneficial to have one yes, is your spindle going to run better, in general Yes it will, In some country's you have no choice it has to be installed along with the input Filter.

On installs I have found input power Filters to be more beneficial for your whole system, and of cause using both if cost is not an issue, it is worth the extra to protect expensive spindle motors, cheap spindles that's up to you, if you have a noise problem, this will help with that

[naspc]

I will give a couple of resellers a call on the best solution for my set up. Thanks everyone.

[Al_The_Man]

I look at it this way, your VFD has a large bank of capacitors on the power input this in and of itself acts as a form of harmonic suppression.
Here the service company request installations that have a large number of mains power switching devices such as VFD's etc to install power factor correction on the power supply due to these devices when in number result in poor PF.
For a single installation it is not a problem.
Al.

[mactec54]

I look at it this way, your VFD has a large bank of capacitors on the power input this in and of itself acts as a form of harmonic suppression.
Here the service company request installations that have a large number of mains power switching devices such as VFD's etc to install power factor correction on the power supply due to these devices when in number result in poor PF.
For a single installation it is not a problem.
Al.

Here is some good information, look under Side-Effects of adding a Reactor

[Al_The_Man]

That is just one opinion among many out there, I have used my method for over 30yrs in installing VFD's in commercial settings, and no call backs.
It is just a case of you pay your money, you take's your choice.
Al.

[naspc]

If you have a 2.7kw spindle than its 3.6 Hp

I may have undersized my VFD. My VFD can handle spindles up to 2.2kw 3hp.
Will this a problem?

[mactec54]

I may have undersized my VFD. My VFD can handle spindles up to 2.2kw 3hp.
Will this a problem?

Yes you should always go for 1 Hp to 2Hp larger with the VFD when using 240v Single Phase to power it, 2 Hp being the best choice

[naspc]

Yes you should always go for 1 Hp to 2Hp larger with the VFD when using 240v Single Phase to power it, 2 Hp being the best choice

That's what I was afraid of. What is the worse case scenario if I used this VFD?

[mactec54]

That's what I was afraid of. What is the worse case scenario if I used this VFD?

Your spindle may not be able to get the required amps output from the VFD, so the spindle motor performance would not be so great, also the back regen voltage from the spindle motor, my fry the VFD if the spindle slows down to quickly

[naspc]

Your spindle may not be able to get the required amps output from the VFD, so the spindle motor performance would not be so great, also the back regen voltage from the spindle motor, my fry the VFD if the spindle slows down to quickly

OK I think I got some better news. According to the distributor of my spindle. He says my spindle is 2.7hp at 8.9A.
The VFD I have is a Lenze ESV222N02YXB rated up to 3hp and output of 9.6A.

I know its not the greatest but I don't have enough funds to get another VFD.

Would adding a breaking resistor work?

[Dan911]

I have tekno spindle 2.7KW 220/380V 18000/24000 RPM.

I'm glad it worked out for you.

[mactec54]

OK I think I got some better news. According to the distributor of my spindle. He says my spindle is 2.7hp at 8.9A.
The VFD I have is a Lenze ESV222N02YXB rated up to 3hp and output of 9.6A.

I know its not the greatest but I don't have enough funds to get another VFD.

Would adding a breaking resistor work?

Adding a Braking resistor is always a good Idea, but if you are short of funds, it could be better spent somewhere else, if you can have a long rundown time this will help, and you would not need the Braking Resistor, if you want a short stopping time you will need the Braking Resistor

[naspc]

Rundown time that means no emergency stops then. I have found a VFD in price range but I Am not sure of the quality.
5 hp VFD, 1 phase to 3 phase VFD | GoHz.com

[naspc]

I found another Huanyang 5hp 4.0kw. will this one do?

http://pages.ebay.com/link/?nav=item...784425&alt=web

[Dan911]

Naspc, why are you looking at another VFD when you already have the Lenze ESV222N02YXB ? Why not get up and running with what you have, that's where your learn the most. I have a 3kw spindle with a 3kw equally matched HY VFD, been going for 2 years. When it finally fails I know better now to get a 5hp or better.

[naspc]

Naspc, why are you looking at another VFD when you already have the Lenze ESV222N02YXB ? Why not get up and running with what you have, that's where your learn the most. I have a 3kw spindle with a 3kw equally matched HY VFD, been going for 2 years. When it finally fails I know better now to get a 5hp or better.

True, just need to remember to decel slowly. I guess I just want it done right the first time.

[Dan911]

True, just need to remember to decel slowly. I guess I just want it done right the first time.

Just a heads up...Your never gonna be done.

[naspc]

Just a heads up...Your never gonna be done.

I starting to see that pattern in most of my projects.
Thanks.

[naspc]

I know it been awhile. I finally got 220v wired up in my garage. Been talking to a guy at Precision Electric, Inc. he has recommended Line reactor, Load reactors for my set up. Is this an over kill? I was thinking of adding a dynamic braking module as well .