Salut Azzuro,
 Very good idea, I’m going to start looking for used MCs.

  Are there any versions to avoid?

Have a nice day,

Lionel

Good evening Azzuro,

Thank you for these measurement records, which I keep as a reference. I also think that the malfunction of one or more stages of the IGBT is the cause of my problem.

I once connected the battery pack without pre-charging. I had to replace one of the supercapacitor fuses. I probably damaged the IGBT at the same time.

To check the operation of the IGBT, I will carry out new measurements:

- control the supply voltages +15V1 to V4

- check UN=f(UP) VN=f(VP) WN=f(WP) to be sure that the command is correct

- check A=f(UP) B=f(VP) C=f(WP)

I hope that these measurements will help me identify if any of the 6 stages of the IGBT are malfunctioning.

To make these measurements, I am lucky enough to be able to use a 2-channel isolator.

I hope to find the time to do these measurements in the coming days.

Thanks again.

Have a good evening,

Lionel

Thank you Azzuro, and sorry for the inappropriate suggestions. Also, there is no urgency.

  Have a good evening,

Lionel

Thank you very much Azzuro for these investigations.

If you wish, it is possible to make a low pass filter at 3khz at the input of your oscilloscope by proceeding in this way:

- hypothesis: the input impedance of the oscilloscope or the probe is 10Mohms

- add a resistance of 10 Mohms between the measured signal and the oscilloscope (in this case, an X2 ratio will need to be added to your probe setting)

- add a 10pf capacitor in parallel with the oscilloscope (if the oscilloscope already has an equivalent capacity at the input, you can reduce the value of the capacitor to be added).

Do you want me to draw a figure?

To make things easier for you, I can send you these components by lettrer or even make a small test plate, and depending on your connections, I can also arrange BNC connectors. Don’t hesitate to take a photo of your oscillator or give me its model so I can check its input characteristics.

Thank you again for your patience and don’t hesitate to let me know if I’m asking too much...

Best regards,

Lionel

Merci beaucoup Azzuro !

Hello Azzuro,

I upgraded the software version of the MC from MCR2042-1 to MCR2042-4 but nothing changed in my problem.

Indeed, I’m missing some power, and the engine’s behavior makes me say that a phase is missing. Although the electrical signals recorded tell me otherwise.

I measured the resistances of the motor coils, motor disconnected. About 0.1 ohm for each coil.

By rotating the wheel by hand, I feel the positions of the magnets. I notice that:

- on a position I can accelerate

- on position + 1 I can accelerate

- on position + 2 nothing happens

- on position + 3 = the first position I can accelerate

- and so on...

Regarding the position sensor calibration, it also turns off in the middle of the procedure, which seems normal if a phase is missing: I made another video, 2.35 minutes, and I shared it from my drive.

Have a good evening,

Lionel

Hello Azzuro,

Yes, i sent you news link from my google drive.

Have a good evening,

Lionel

Hello Azzuro,

I’m sorry for the delay in my response.

All this time allowed me to better understand the operation of the position sensor.

https://docs.google.com/document/d/1hGfxLRdMFslErmc_yufb86nrYWMRoTVMPQI3SUXZKNI/edit?usp=drive_link

In my opinion, the sensor works well.
I also subsequently installed 3 oscilloscope probes on the power outputs that control motors A, B, and C.
As the controller builds the sinusoids from PWM commands, I used low pass filters at 3khz to visualize the control waves.
Here is the recorded video.

https://drive.google.com/file/d/1JQCNpny89uoLUOs7Mgi_NxsZC2arXu8t/view?usp=drive_link

For me, there is indeed a problem with the control of the motor controller. The PM300 seems to be working because I have the same signals on these inputs.
Shouldn’t I reload the controller’s code?

Thank you for your help.
Best regards,
Lionel

Thank you Azzuro,

I also have the 12 pages of electronic diagrams that help me understand part of the operation. I am still sending you my email address which could be used for the future...

Have a good day,

Lionel

Sylvain, 
Do you have a link for the VECTRIX WORDWIDE Whatsapp Group ?
Thanks