DC 110KW Drive Problem

Kootni · Oct 5, 2018

Dear members,
can you please assist.
As soon as start PB is pressed, the drive cuts off immediately and goes to Error mode. We then have to switch off the drive to reset it. We had the newdrive board put in recently. Could it be problem with the motor rather than drive? anything we can look at to identify the issue. It’s Mentor 2 Drive. See attached pics

[ElectriciansForums.net] DC 110KW Drive Problem

Marvo · Oct 5, 2018

Is it a shunt wound motor?
What happened that required a new drive board to be fitted?
What testing have you done so far?

Kootni · Oct 6, 2018

Motor spec attached.
The board went dead all of sudden. Transformers blown. New board comes on but when PB is pressed the Drive cuts the power to motor. And then will have to switch off the drive and switch back on for reset.
Could it be field problem in motor? What tests can be done

Pete999 · Oct 6, 2018

Time to call a specialist Engineer, who has knowledge of this type of Machine, Kootni, in my opinion.

Toneyz · Oct 6, 2018

Pete999 said:
Time to call a specialist Engineer, who has knowledge of this type of Machine, Kootni, in my opinion.

As Pete said this is a more specialist area and you need someone that has had training for this.

westward10 · Oct 6, 2018

Is it giving a fault code, the pic shows 118 on the readout that is a fault code for field loss or no current in the field supply circuit so yes could be a motor winding issue.

PEG · Oct 6, 2018

Surely some testing was applied to the motor prior to board changing?

Kootni · Oct 6, 2018

Board went completely dead first, stone dead. Haven’t checked motor winding. Wonder why the original board totally died. Orange transformers just leaked probably due to over current. See picture

westward10 · Oct 6, 2018

I doubt any motor issues caused that as the panel will have built in safeguards.

Kootni · Oct 6, 2018

So what might be the cause?

netblindpaul · Oct 6, 2018

Have you checked the fault registers?

westward10 · Oct 6, 2018

netblindpaul said:
Have you checked the fault registers?

#6?

Kootni · Oct 6, 2018

If u mean section 6. Yes. Nothing jumps out of there.

netblindpaul · Oct 7, 2018

Registers #1 to #19 will give you the drive status at point of failure until the drive is powered down.
Each register has a use and the status will help you identify the fault.
Note them down, and then check against the documents what the contents of those registers refer to.
That will tell you hopefully what the drive status is on shut down, so should point you in the direction of why there is no field current flowing (fault #118).

OP, if this is on a machine breakdown, would it not have been cheaper to bring in a drives specialist by now after several days downtime the losses must be astronomical, guessing from the drive and motor an extruded application? So a line on stop? Costs running towards £100k surely?

Chris1234 · Oct 9, 2018

These drives are commonly found on larger extruders.

Have you done the basic motor tests and insulation resistance tests?

You need semi-conductor rated fuses for this application, cheaper fuses aren’t economical!

DC 110KW Drive Problem

Kootni

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Marvo

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Kootni

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Pete999

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Toneyz

westward10

PEG

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Kootni

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westward10

Kootni

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netblindpaul

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westward10

Kootni

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netblindpaul

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Chris1234

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