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I have converted a Citroen AX, the car with everything you need and nothing you don't, to electric drive. The AXe with 410 max V battery and eDrive consisting of TM4 motor MD 120B-X Part No 3316-0231-C, TM4 controller CO150 and GKN Family 2 transmission. The interface to the controller was engineered by a friend who is very good with electronics and control-strategy; I don't understand it!

Issue developed that above ~ 3000 rpm the eDrive vibration became unacceptable, shaking the car violently. Splitting the motor from the transmission I then ran up the motor and it ran smoothly at first then vibrated violently; with no load input it did coast down to rest over an extraordinary long period. I am not sure if the motor has a bearing issue or is out of balance, I doubt any control issue would cause that vibration.

So having spent far too long building and commissioning the car I now am desperate for help to resolve the motor issue - and quite willing to pay for someone with experience to strip the motor if any one can be recommended. If not any advice or manual for the TM4 motor welcome as I will attempt it myself.

Fingers crossed.

Jonny AXe
07847858193
 

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Hi, that's a very interesting build and I am interested to see more pics if you don't mind.

Unfortunately, I can't be of much help to you. But I was wondering if you can help me out? I have the same CO150 Inverter and I am trying to figure out how to control it for my Borwarner HVH250-115D motor. Is it possible for you to share the interface, please?? It will be immensely helpful for my build.

Thank you
Madhu
 

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Issue developed that above ~ 3000 rpm the eDrive vibration became unacceptable, shaking the car violently. Splitting the motor from the transmission I then ran up the motor and it ran smoothly at first then vibrated violently; with no load input it did coast down to rest over an extraordinary long period. I am not sure if the motor has a bearing issue or is out of balance, I doubt any control issue would cause that vibration.
If the coast down is smooth, that would confirm that it is not a balance issue. The coast down will take a long time because a motor is a flywheel with little drag - a very long coast-down would confirm little drag in the bearings.

It is certainly possible for a control issue to cause severe vibration. Perhaps at high speed the controller is unable to keep up with the signals from the encoder, so it is applying power out of synch with the motor position. This is the sort of thing that a multi-channel oscilloscope is used for.
 
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