Bridgeport Interact Choke

[jmccracken]

Hello all,

I am looking for a replacement choke for my Bridgeport Interact I (see attached picture) ... it is a J.M.C. 1553883. Does anyone have any or know where I can get one (or an equivalent). My initial Google searches haven't turned anything up.

Thanks!

[jmccracken]

For greater clarification, this is the "L1", "L2", and "L3" choke regulating power into the Bosch servo controllers ... see attached wiring schematic.

Many thanks!

[keebler303]

You can get them here: MTE Corporation - Line/Load Reactors, Line Reactors, Load Reactors- MTE Corporation

You can find MTE line reactors on ebay for decent prices, I have bought several.

You can also get them (possibly cheaper) from automation direct

Matt

[Al_The_Man]

The one shown in the print is a bit of a different animal than the 3phase chokes, the BP shows the two windings on the same core for mutual suppression of both lines.
They are rarely seen on this side of the drive, they are more often used for impedance match in the DC motor leads.
Al.

[keebler303]

The specifics are not something I am well versed in but MTE does describe how to use a 3 phase reactor on a single phase load. I see where this still differs from the existing part but maybe it is close enough?

http://www.mtecorp.com/appnotes/an0102rev2.pdf

Automation direct sells them for single phase too: LR-23P0-1PH Products

Matt

[jmccracken]

Thanks for the info.

Can anyone point to a line reactor or choke that has both (or all three) windings on the same core?

[Al_The_Man]

You may have a problem finding them now, they were quite common in the days of the older velocity type DC motor drives when they were placed in the motor DC leads.
Al.

[keebler303]

I am sure MTE or someone else could custom make you one, they have similar "DC Link Chokes" with only 1 winding: MTE Corporation - DC Link Chokes, DC Link Reactors by MTE Corporation

I think the relevant question is do you need the single core type or is a more common one ok.

Matt

[jmccracken]

That's a great question ...

... and thank you for the term "DC Link Choke".

How would I determine amperage or other specifications? Could I simply turn on the machine and monitor amperage through one of the lines?

I wound up speaking to a knowledgeable technician at Bridgeport and learned that the part number on the choke is a Bridgeport part number.

[Al_The_Man]

The thing is it is not a critical piece of the operation, you could probably get some other surge suppression device from the likes of Electro-Cube etc.
Is the one you have burned out? I would have been surprised if it did in that application, it looks like a fairly heave duty choke?
If it did fry it would indicate that the normal current was too high?
Al.

[jmccracken]

No, all three (3) of the ones I have are just fine. I'm attempting to build up a 4th axis. I have an extra Bosch Z15-1-240V servo controller and SEM servo motor (same motor and controller as my other three axes).

My first step is to hook up the controller and do a smoke test ... for best results my thinking is to use the correct upstream components. Your comment that the controller might be insensitive to this "DC Link Choke" is encouraging.

[Al_The_Man]

The axis would work fine without it, it is very rarely seen now, if at all, especially on the AC input side, where it is situated it should have very little effect on 60hz, it is intended to suppress any high frequency spike etc on the line, the transformer feeding it actually offers some inductive suppression itself?
You could get high energy snubbers from Electrocube that should be just as effective.
Al.