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AC Motor rotation / Toyota

Number of messages: 10

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elektrodrive
West Midlands, United Kingdom

Can someone shed some light on the theory of operation for ac motors. I had a customer who had a toyota with twin drive ac motor controllers, the sauer danfoss motion drives. One of the motors had a shorted winding and was sent away for repairs.

The motor was repaired and refit last week, but the problem now is that when in forward the motor goes backwards and when put in reverse the motor goes forward.

Can I change the power cables in order for it to work correctly? Or has the motor somehow been rebuilt incorrectly?

(The other motor still works correctly its just the motor that has been repaired.)

Posted 26 Sep 2009 07:45 PM

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DAMO
DUBLIN, Ireland

what the model shane ...i have info on the workings of ac motors i will send to u ps i sent that info on yale /hyster
regards damo

Posted 26 Sep 2009 08:42 PM

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AndyPandy
Staffordshire, WM, United Kingdom

The direction and control of an AC drive motor comes from the sensor bearing in the motor. I would guess that either you have the wrong sensor bearing or it is wired up incorrectly, or maybe just in the wrong way round.

Posted 26 Sep 2009 09:16 PM

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danny_k
Buckinghamshire, United Kingdom

Hi Damo,
Could you send that to me to?
my e-mail is in my profile.
cheers,

Posted 26 Sep 2009 10:21 PM

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elektrodrive
West Midlands, United Kingdom

Hi Damo

I am not shane sorry, but did work for him before to starting on my own, you may have me mistaken somehow sorry. I would still appreciate the info cheers.

Will look into that sensor Andy, cheers.

Posted 27 Sep 2009 06:48 AM

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jeremy_s
California, United States

switch any two of the uvw cables and that will change the direction- controller or motor

Posted 27 Sep 2009 07:46 AM

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jeremy_s
California, United States

uvwuvwuvwuvwuvwuvw = rotation in one direction
wvuwvuwvuwvuwvuwvu = rotation in the opposite direction

therefore changing any two cables will sequence the motor in the other direction.

Posted 27 Sep 2009 07:51 AM

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elektrodrive
West Midlands, United Kingdom

HI again

Thanks for the posts much appreciated, will try switching on Monday and see if it does the trick.

Posted 27 Sep 2009 08:57 PM

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jeremy_s
California, United States

do not forget to discharge the inverters

Posted 28 Sep 2009 01:02 PM

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elektrodrive
West Midlands, United Kingdom

Discharge the invertors??

Oops..ok changed the cablles over and that seems to have solved that problem.  Thank you for the info.

What i noticed when i wne tout to the truck was that on the display it comes up as demo-18 and the truck drives very slow.

Anyone come across this before?? I could not find anything on the manual and i could not enter through the display to make any changes as when i press the buttons nothing happens.

Also when the motor was repaired they forgot to put the thermistor back in hence a thermistor c2-2 fault code appears.

All working OK now.  Thanks for the help everyone.

Modified 3 Oct 2009 03:02 AM
by poster.

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