Search found 16 matches

by TurboWelderMonkey
Apr 15 2021 5:26pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

We are currently finding that some of the diodes at the hall inputs of the controller may be fried... may have found the cause
by TurboWelderMonkey
Apr 15 2021 3:21pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

It doesn’t make sense, the hall voltages must’ve been equal in the originally designed part. Question is then what would cause the voltage difference on two of the sensors? That cause could be part of your issue. Maybe you should follow the traces and see if there are more damages along the way, or...
by TurboWelderMonkey
Apr 15 2021 2:22pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

That signal looks totally off. It’s supposed to be a square wave with ON for 180 degrees electrical and OFF for 180 degrees. Is the signal constant with peaks both high and low or do i read it wrong? Yea my buddy said that signal has absolutely no place in electronics hahaha. And kinda its just the...
by TurboWelderMonkey
Apr 15 2021 9:43am
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

after finishing the drivers and fets on the damaged phases, I'm still having the same issue... so larsb may be right that something is up with the halls. We checked them on the scope at the controller input and what do you know? Just like AmberWolf said, one of them pulls up close to 5v and the othe...
by TurboWelderMonkey
Apr 14 2021 5:55am
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

It'll be interesting to see the conclusion on this. In hindsight the halls should be ruled out before turning to the gate drivers check. I wonder what would happen if you spun the motor at noload and slowly increased load and current by braking the wheel until controller cuts out while looking at t...
by TurboWelderMonkey
Apr 13 2021 9:11am
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

Also I forgot to mention that it does fail the automatic hall test with any and every phase combo, but let's assume my halls are fine, could a bad gate driver cause this symptom also? No, probably not. If your motor runs ok in noload it should be able to drive it to pass the hall test if halls are ...
by TurboWelderMonkey
Apr 12 2021 7:00pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

Oh my goodness. No. I checked my digikey invoice and the halls I ordered were the freaking s441... so is that my issue then??? :oops: Edit-- checked the post I read about the correct halls that work and I guess the s441a is the one he said to use so I have no idea lol. ”Exact same halls but honeywel...
by TurboWelderMonkey
Apr 12 2021 6:54pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

Also I forgot to mention that it does fail the automatic hall test with any and every phase combo, but let's assume my halls are fine, could a bad gate driver cause this symptom also?
by TurboWelderMonkey
Apr 12 2021 6:41pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

”Exact same halls but honeywell” won’t ever happen :wink: They all have different switching characteristics. SS411 is often recommended here due to their constant output. A56937AB-6F16-4A47-851A-7DE6731B8B27.jpeg Those are the ones I got! SS411 Unipolar. Because someone else on here that replaced t...
by TurboWelderMonkey
Apr 12 2021 11:48am
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

I actually got the motor running awesome! All the way to 115kph Does motor go faster after the repair? This could still indicate a sensor issue. Lastly, I have 2 sets of halls that I replaced, one stopped working completely after some of these tests and over current faults, and the other set has 3 ...
by TurboWelderMonkey
Apr 09 2021 3:04pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

Hell yea man! I just got 15 more of those really good FETs today, and I have gate drivers arriving Monday, but they are the wrong ones, lol I ordered 2112s and they are 2110s. My buddy looked at the sheets and said they may work in place but I better get the right ones. I'm going to test the origina...
by TurboWelderMonkey
Apr 07 2021 6:10am
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Re: Replacing Controller MOSFETs (Sabvoton72150)

The problem with blown FETs is that it's not uncommon for the gate drivers to get damaged or destroyed during the FET failure (battery voltage can get leaked into the gate pin, then back thru the drivers). You can also get FETs that are just damaged and not blown, so they appear to be ok until they...
by TurboWelderMonkey
Apr 06 2021 10:06pm
Forum: EBike Troubleshooting
Topic: 5000watt Enduro Ebike help
Replies: 8
Views: 231

Re: 5000watt Enduro Ebike help

It sounds like you're having the same symptoms as me bro! Most likely blew a mosfet or 2!
by TurboWelderMonkey
Apr 06 2021 9:33pm
Forum: EBike Troubleshooting
Topic: Replacing Controller MOSFETs (Sabvoton72150)
Replies: 21
Views: 473

Replacing Controller MOSFETs (Sabvoton72150)

Hey guys! I'm new here but I joined after reading several threads relating to my issue, and I could use some more help. I replaced an entire bank of FETs in my controller after a torque arm failure caused phase wire damaged, shorting out all my halls and one whole phase bank (blue).I repaired the ha...
by TurboWelderMonkey
Apr 06 2021 9:19pm
Forum: Bike Mechanical & Structural
Topic: 120v aluminum/cromo TIG welding on bike frames - possible?
Replies: 42
Views: 926

Re: 120v aluminum/cromo TIG welding on bike frames - possible?

Why would regular steel be out of the question??? Many grades of standard carbon steel like A36 would be great for a bike frame, and it's super easy to work with.
Source --- Am professional welder/fabricator.
by TurboWelderMonkey
Apr 06 2021 9:18pm
Forum: Bike Mechanical & Structural
Topic: 120v aluminum/cromo TIG welding on bike frames - possible?
Replies: 42
Views: 926

Re: 120v aluminum/cromo TIG welding on bike frames - possible?

Why would regular steel be out of the question??? Many grades of standard carbon steel like A36 would be great for a bike frame, and it's super easy to work with.
Source --- Am professional welder/fabricator.