INMOTION V12

[EUC Phenomenon]

I would be happy with an exchange of a new board. I've seen the Disassembly & Controller Replacement video from Inmotion and it doesn't look that complicated. I guess I would take the recall option but what would that involve? Would Inmotion replace my wheel with a new one or would I get a refund? I can't see Inmotion doing a recall, because of the cost.

[Tawpie]

if you want to spend some time, match the specs of the existing part but up Vds to at least 120V (although I don't know if that's high enough to handle regen, ringing, temperature derating etc.) This link filters to only 120V Vds, you should change that to see parts that have higher Vds, they do exist.

https://www.digikey.com/en/products/filter/transistors-fets-mosfets-single/278?s=N4IgjCBcpgbFoDGUBmBDANgZwKYBoQB7KAbRABYwBmMcgDhAF0CAHAFyhAGU2AnASwB2AcxABfArAAM8aCGSR02fEVIgqAdjoBOXU1YdI3PkNESQAJhkM5CpbgLFIZMFYAEANX0h2nAKqC-GwA8igAsjhoWACuvDji5hZqLIQA7ji8bmHBXABiAKIAKt4ArAg%2BUGCsLJVSUuayoPwAJpzSDAacPAIiIARsAJ4s8UbNWMhiYkA

Note the 53 week lead times for quantity buys...

I'd start with this one, but its thermals are not nearly as good (3x the on resistance) and there are a ton of fine details but on the surface it would deserve a close look

 https://www.littelfuse.com/~/media/electronics/datasheets/discrete_mosfets/littelfuse_discrete_mosfets_n-channel_ultra_junction_ixt_150n15x4_datasheet.pdf.pdf

Edited January 21, 2022 by Tawpie

[Shane Dougherty]

Just received my V12 today and it looks great but... after being plugged in for 30 minutes I got this error! 

Fault warning

Charging failure, you may need to replace the battery or charger. Please contact your point of purchase or email us. service@imscv.com

[meepmeepmayer]

The likeliest explanation is a bad charger. Contact your seller.

Nothing worse than not being able to use a brand new wheel though!

[Shane Dougherty]

The light on the charger flickers red then green.  Back and forth. Would it harm anything to try my charger for my 84v Gotway Tesla v2?

[Paul A]

Could it be that the connection/contact between the charger plug and the wheel is a bit loose?

Maybe push the plug into the wheel more firmly?

[Unventor]

33 minutes ago, Shane Dougherty said:

The light on the charger flickers red then green.  Back and forth. Would it harm anything to try my charger for my 84v Gotway Tesla v2?

I am not sure they share same pin configuration. Also they might have different charging algorithm (I am not sure how GW chargers works). 

I would suggest talking to your reseller. I don't recall what the blinking means. I have not had this myself on any Inmotion wheel yet. 

[Shane Dougherty]

35 minutes ago, Paul A said:

Could it be that the connection/contact between the charger plug and the wheel is a bit loose?

Maybe push the plug into the wheel more firmly?

First thing I checked. 

The Gotway charger is only 84v but if it's the same pinout at least I'd know if I received a bad charger or if it was something in the wheel. 

[pkinpdx]

 

2 hours ago, Shane Dougherty said:

First thing I checked. 

The Gotway charger is only 84v but if it's the same pinout at least I'd know if I received a bad charger or if it was something in the wheel. 

It is a different plug and will not fit.  I wouldn't risk it even if you could get it to fit, most likely result would be two borked EUCs.  If you know anyone else with a 100v wheel you could test your charger on theirs or test your V12 on their wheel.  All current 100v wheels use the same plug.

[.....]

3 hours ago, Shane Dougherty said:

First thing I checked. 

The Gotway charger is only 84v but if it's the same pinout at least I'd know if I received a bad charger or if it was something in the wheel. 

You wont learn anything by trying to charge a 100v wheel with an 84v charger. At best, nothing will happen. At worst, youll be filing a claim with your fire insurance home policy.

[Chester Copperpot]

10 hours ago, Shane Dougherty said:

Just received my V12 today and it looks great but... after being plugged in for 30 minutes I got this error! 

Fault warning

Charging failure, you may need to replace the battery or charger. Please contact your point of purchase or email us. service@imscv.com

I had this issue and in my case it was caused by one of the connections from the battery where it plugs into the board. It appeared that when they pushed the connector onto the pins, the sleeve pushed out of the connector instead of sliding onto the pin.

It’s under a rubber boot so you can’t  really see it until you try to unplug it. Putting it back together fixed it and it then charged correctly. 

[Shane Dougherty]

2 hours ago, Chester Copperpot said:

I had this issue and in my case it was caused by one of the connections from the battery where it plugs into the board. It appeared that when they pushed the connector onto the pins, the sleeve pushed out of the connector instead of sliding onto the pin.

It’s under a rubber boot so you can’t  really see it until you try to unplug it. Putting it back together fixed it and it then charged correctly. 

I'll check that

[Shane Dougherty]

I am reading 100v on ghe charger but the pinout numbers on the back of the charger look opposite to the end of the plug.  See numbers in photos. Numbers 1&2 measure positive and 4&5 negative but it looks the opposite on the charger diagram? 

[Jeff Earl]

6 minutes ago, Shane Dougherty said:

I am reading 100v on ghe charger but the pinout numbers on the back of the charger look opposite to the end of the plug.  See numbers in photos. Numbers 1&2 measure positive and 4&5 negative but it looks the opposite on the charger diagram? 

That matches the readings on my V12 charger as well. 1&2 measure positive 100V.

[Shane Dougherty]

4 minutes ago, Shane Dougherty said:

I am reading 100v on ghe charger but the pinout numbers on the back of the charger look opposite to the end of the plug.  See numbers in photos. Numbers 1&2 measure positive and 4&5 negative but it looks the opposite on the charger diagram? 

[Jeff Earl]

36 minutes ago, Shane Dougherty said:

That's right. The diagram is illustrating the male EUC side of the connector (the pins) which is a mirror image of the female charger-side of the connector. Note that the numbers allign when you plug it in. 1->1, 2->2, 3->3, etc.  Hope that makes sense.

Although now that I look more closely, they have mislabeled positions 4&5--they are swapped in the diagram. Go figure.

Edited January 23, 2022 by Jeff Earl
Slight correction.

[Funky]

Dam, that's dangerous. Did not know if you put motor other way, it will go crazy..

Check out this video.

 

Edited January 23, 2022 by Funky

[Tawpie]

Sorry, I had to chuckle when it took off on him. I know the thoughts/feelings that make your face look that way.

Good PSA though!

[Shane Dougherty]

5 hours ago, Jeff Earl said:

That's right. The diagram is illustrating the male EUC side of the connector (the pins) which is a mirror image of the female charger-side of the connector. Note that the numbers allign when you plug it in. 1->1, 2->2, 3->3, etc.  Hope that makes sense.

Although now that I look more closely, they have mislabeled positions 4&5--they are swapped in the diagram. Go figure.

I thought that was weird but at least I know my charger seems okay.  Now I'll need to pull my wheel apart.  Not sure that I want to do this knowing that a warranty fix should be coming for the control board? 

[Tawpie]

1 minute ago, Shane Dougherty said:

Not sure that I want to do this knowing that a warranty fix should be coming for the control board?

It’s your wheel, but if it were mine and it wouldn’t charge out of the box, and I knew that it might need a replacement drive board—I’d have already sent it back. These are too expensive to risk any questions about your warranty coverage… at the very least get in touch with your reseller right away if not sooner.

[Shane Dougherty]

12 minutes ago, Tawpie said:

It’s your wheel, but if it were mine and it wouldn’t charge out of the box, and I knew that it might need a replacement drive board—I’d have already sent it back. These are too expensive to risk any questions about your warranty coverage… at the very least get in touch with your reseller right away if not sooner.

Reseller is Chicway on the other side of the world.  I have tried to contact them but have not gotten a reply yet.  I've got a foot of snow to deal with so riding won't happen soon but it drives me crazy not knowing what's wrong with it! I'll wait to hear from Chicway before I touch it. 

[Tawpie]

1 minute ago, Shane Dougherty said:

I'll wait to hear from Chicway before I touch it. 

That’s good to hear. I think they (or AliExpress) have a return policy—it’s not a liberal one though. Basically you can’t use it at all or you might not be able to send it back.

Serious bummer, good thing the riding weather is also not cooperating!

[Paul A]

There was a video showing how to replace the bearings on a Sherman.

Same thing applied with the orientation of the hub, it's not symmetrical and left/right side matters.

[Jeff Earl]

19 hours ago, Funky said:

Dam, that's dangerous. Did not know if you put motor other way, it will go crazy..

Check out this video.

 

A cautionary tale indeed. But what I don't understand is why this isn't the case with all wheels. Chooch seems to imply that this issue is unique to Inmotion or the V12 specifically. Why isn't this the same with all wheels? For self-balancing to work, the motor direction is fundamental. The controller drives the motor to apply a torque counter to any lean angle induced by the rider. If the motor is installed backwards, rather than correcting the lean angle, the resulting torque would increase it, driving the controller to dump even more power to the motor in a futile attempt to maintain level. The resulting feedback loop will always result in a catastrophic runaway condition (and perhaps broken baseboards), no? Unless other wheels have an asymmetric mounting arrangement (or short cables) that makes it physically impossible to install the motor backwards, I would think all EUCs could ruin your day if you install the motor backwards. Of course some tire tread patterns are directional as well, but getting the tire wrong is of far lesser consequence. 

 

[Chriull]

10 minutes ago, Jeff Earl said:

But what I don't understand is why this isn't the case with all wheels.

It is. For exactly the reason you mentioned - positive feedback loop.

If one is unsure, one should always assume that (mechanical and electrical) components should be reassembled exactly as they were before