Popular Post Harold Farrenkopf Posted June 24, 2019 Popular Post Share Posted June 24, 2019 14 minutes ago, stephen said: Nearly all the mosfets are burnt and some are incinerated 😬😬 No, only 2 are. The rest of the smoke / soot is from those 2. 2 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Marty Backe Posted June 26, 2019 Author Popular Post Share Posted June 26, 2019 News Directly From Gotway Gotway has reached out to me, acknowledging that they have seen my video and that they want to replace my control board. But here's the real kicker, and should be of interest to many. After telling me that a new board will be sent to me, on a separate line is this, "With big MOSFETs" So it appears that Gotway does have a new 84-volt control board design with what I assume is the TO-247 MOSFETs. Very exciting. They've heard us 19 9 Quote Link to comment Share on other sites More sharing options...
Popular Post Jon Stern Posted June 26, 2019 Popular Post Share Posted June 26, 2019 56 minutes ago, Marty Backe said: So it appears that Gotway does have a new 84-volt control board design with what I assume is the TO-247 MOSFETs. And a thick layer of cork between the MOSFETs and the heatsink? 😉 Seriously though, could that mean they are simply replacing your board with the one from the 100V Nikola Plus? If yes, that doesn't mean they are fixing the root cause of the issue for all 84V Nikolas. Hopefully they are, but explicit confirmation is needed. 6 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Marty Backe Posted June 26, 2019 Author Popular Post Share Posted June 26, 2019 2 minutes ago, Jon Stern said: And a thick layer of cork between the MOSFETs and the heatsink? 😉 Seriously though, could that mean they are simply replacing your board with the one from the 100V Nikola Plus? If yes, that doesn't mean they are fixing the root cause of the issue for all 84V Nikolas. Hopefully they are, but explicit confirmation is needed. Let's not throw cold water on my excitement to get a new and better control board They know I have a 84-volt Nikola so I doubt they would send me a 100-volt control board. Even for Gotway that would be pretty bad. Nope, I'm calling this a good story 5 3 Quote Link to comment Share on other sites More sharing options...
Popular Post stephen Posted June 26, 2019 Popular Post Share Posted June 26, 2019 27 minutes ago, Marty Backe said: Let's not throw cold water on my excitement to get a new and better control board They know I have a 84-volt Nikola so I doubt they would send me a 100-volt control board. Even for Gotway that would be pretty bad. Nope, I'm calling this a good story I'm glad to hear this news Marty , hope they fly it to you and not the slow boat ☹️, does this mean,,, yes you guessed it ,,,, over heat hill test 😁😁,,,, maybe after a couple of small hills and you get no voltage vibrations maybe?😊 Tell the prison inmates Nikola is coming to see them 😄 they'll be well excited 4 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Marty Backe Posted June 26, 2019 Author Popular Post Share Posted June 26, 2019 26 minutes ago, stephen said: I'm glad to hear this news Marty , hope they fly it to you and not the slow boat ☹️, does this mean,,, yes you guessed it ,,,, over heat hill test 😁😁,,,, maybe after a couple of small hills and you get no voltage vibrations maybe?😊 Tell the prison inmates Nikola is coming to see them 😄 they'll be well excited For sure Overheat Hill again, but maybe after I get another 100 or so miles on the new board - need to break it in first 3 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Michael Tucker Posted June 26, 2019 Popular Post Share Posted June 26, 2019 This is the only sensible outcome. You are the highest profile North American Gotway rider with a very big forum and YouTube presence. For their newest high performance wheel to fail spectacularly on camera by their biggest cheerleader and to discover the glue and small 2017 MOSFETs was a serious gut punch to their marketing. Many of us explicitly wait for your tests and thoughts to influence our purchase decisions. Of course, now if you truly love Gotway and this Nicola, you have to run it up those hills again and give us the all-clear to purchase! 5 2 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted June 26, 2019 Share Posted June 26, 2019 Marty, your videos are really helping! Nikola with no glue, TO-247 with bigger mosfets, and 2100Wh is going to be sweeeeeeeeeeeeeeeet! 2 Quote Link to comment Share on other sites More sharing options...
kelec_947 Posted June 26, 2019 Share Posted June 26, 2019 New gotway tesla v2 used Mosfet TO-247 ?? Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted June 26, 2019 Share Posted June 26, 2019 5 minutes ago, kelec_947 said: New gotway tesla v2 used Mosfet TO-247 ?? No, same board as the old Tesla. See here in this Tesla2 thread: On 4/25/2019 at 7:40 PM, Jason McNeil said: For the past six months Gotway has been using the newer HY MOSFETs on all the Wheels, including the Tesla. The only material changes in this variant, is the handle cut-off switch & speakers. UPDATE: just seen the pictures of the internals, awaiting clarification on this. 26 April UPDATE: confirmed, previous production (from 2019) also has the controllers mounted on the side. Looks like they use the same mosfets as the current 84V Nikola has. They aren't TO-247-level, but they're still pretty good. Even the original Tesla mosfets didn't cause problems. Quote Link to comment Share on other sites More sharing options...
US69 Posted June 26, 2019 Share Posted June 26, 2019 10 minutes ago, meepmeepmayer said: No, same board as the old Tesla. See here in this Tesla2 thread: Looks like they use the same mosfets as the current 84V Nikola has. They aren't TO-247-level, but they're still pretty good. Even the original Tesla mosfets didn't cause problems. Yip...Not 247 Mos on the Tesla. The Tesla with it's smaller 4p battery can only provide 2/3rd of power as a 1600wh/6p Wheel. Probably the smaller MOS package is enough for that. 2 Quote Link to comment Share on other sites More sharing options...
Han Vo Posted June 26, 2019 Share Posted June 26, 2019 Will they be sending these out to all Nikola first adopters? Or do i have to burn out and faceplant at 20mph first? 2 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted June 26, 2019 Author Share Posted June 26, 2019 2 hours ago, meepmeepmayer said: Marty, your videos are really helping! Nikola with no glue, TO-247 with bigger mosfets, and 2100Wh is going to be sweeeeeeeeeeeeeeeet! Yeah, I was thinking you just may pull the trigger on the Nikola after all Thanks 2 Quote Link to comment Share on other sites More sharing options...
Popular Post mrelwood Posted June 26, 2019 Popular Post Share Posted June 26, 2019 9 minutes ago, Han Vo said: Will they be sending these out to all Nikola first adopters? Or do i have to burn out and faceplant at 20mph first? Don’t be modest, it might require for you to go 30mph! No news as of yet, but based on past experience I would think that for example Ewheels will sort out their customers, but Gotway or Aliexpress distributors would not actively seek out or notify customers. They might have to be active and a bit persistent to get the new board. 3 2 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted June 26, 2019 Author Share Posted June 26, 2019 14 minutes ago, Han Vo said: Will they be sending these out to all Nikola first adopters? Or do i have to burn out and faceplant at 20mph first? If you bought your wheel from EWheels you should be good. Jason is getting a shipment of new boards. BTW, these boards use the HY5110 MOSFET 1 1 Quote Link to comment Share on other sites More sharing options...
Unventor Posted June 26, 2019 Share Posted June 26, 2019 7 hours ago, stephen said: I'm glad to hear this news Marty , hope they fly it to you and not the slow boat ☹️, does this mean,,, yes you guessed it ,,,, over heat hill test 😁😁,,,, maybe after a couple of small hills and you get no voltage vibrations maybe?😊 Tell the prison inmates Nikola is coming to see them 😄 they'll be well excited Nono they are going very green watercycle delivery. After all it is for an uniCYCLE... Expected 2021 if not satnav mess up 😜 1 Quote Link to comment Share on other sites More sharing options...
Unventor Posted June 26, 2019 Share Posted June 26, 2019 33 minutes ago, Han Vo said: Will they be sending these out to all Nikola first adopters? Or do i have to burn out and faceplant at 20mph first? I think that is a question for your dealer... Quote Link to comment Share on other sites More sharing options...
Popular Post Unventor Posted June 26, 2019 Popular Post Share Posted June 26, 2019 8 hours ago, Marty Backe said: Let's not throw cold water on my excitement to get a new and better control board They know I have a 84-volt Nikola so I doubt they would send me a 100-volt control board. Even for Gotway that would be pretty bad. Nope, I'm calling this a good story Yes and your wife love it too. 1 week of husband garden work and house aid . 3 1 Quote Link to comment Share on other sites More sharing options...
Peter Q Posted June 26, 2019 Share Posted June 26, 2019 10 hours ago, Marty Backe said: News Directly From Gotway Gotway has reached out to me, acknowledging that they have seen my video and that they want to replace my control board. But here's the real kicker, and should be of interest to many. After telling me that a new board will be sent to me, on a separate line is this, "With big MOSFETs" So it appears that Gotway does have a new 84-volt control board design with what I assume is the TO-247 MOSFETs. Very exciting. They've heard us 30 minutes ago, Marty Backe said: If you bought your wheel from EWheels you should be good. Jason is getting a shipment of new boards. BTW, these boards use the HY5110 MOSFET The HY5110 MOSFET is that the Gotway said "With big MOSFETs" , and are they better or as good as the TO-247 MOSFETs used in MSX and Monster? Thanks. PQ Quote Link to comment Share on other sites More sharing options...
Han Vo Posted June 26, 2019 Share Posted June 26, 2019 41 minutes ago, Marty Backe said: If you bought your wheel from EWheels you should be good. Jason is getting a shipment of new boards. BTW, these boards use the HY5110 MOSFET Exactly why we buy from him. Ive been riding around 15 to 20 mph not daring to push it too hard in Vegas hot summer weather. I take mostly bike trails and paths but also some bike lanes that shares with cars. These cars are already riding close to me to see what the hell im riding. It would suck to have a mosfet burned out at that moment. 3 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted June 26, 2019 Share Posted June 26, 2019 25 minutes ago, Peter Q said: The HY5110 MOSFET is that the Gotway said "With big MOSFETs" , and are they better or as good as the TO-247 MOSFETs used in MSX and Monster? The HY5510 mosfet is what's IN the TO-247 package (the black plastic casing of the mosfet). According to the data sheet when you google them ("HY5110 MOSFET"), they will come in TO-247. I don't know if they're the same mosfets used in the MSX, or even better. Some dealer website had the MSX mosfets rated at 200A continuous when I googled for that, the smaller HY3712P (in TO-220) of the Nikola are 170A according to the data sheet, but these are over 300A in comparison. (Numbers used only for relative comparison without meaning by themselves.) They might be even better 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Chriull Posted June 26, 2019 Popular Post Share Posted June 26, 2019 1 hour ago, Peter Q said: The HY5110 MOSFET is that the Gotway said "With big MOSFETs" , and are they better or as good as the TO-247 MOSFETs used in MSX and Monster? 37 minutes ago, meepmeepmayer said: The HY5510 mosfet is what's IN the TO-247 package (the black plastic casing of the mosfet). According to the data sheet when you google them ("HY5110 MOSFET"), they will come in TO-247. I don't know if they're the same mosfets used in the MSX, or even better. Some dealer website had the MSX mosfets rated at 200A continuous when I googled for that, the smaller HY3712P (in TO-220) of the Nikola are 170A according to the data sheet, but these are over 300A in comparison. (Numbers used only for relative comparison without meaning by themselves.) They might be even better I don't know neither, but the important figures are: TO-247 has ~90A case limit for current. TO-220 has ~ almost 80A case limit for current. And mainly the "Thermal Resistance - Junction to Case" from just 0.3K/W for TO247 vs 0.44 K/W for this 247. And the single pulsed avalance energy take by the HY5110 more than twice as high than for the HY3721P. https://www.infineon.com/dgdl/Infineon-ApplicationNote_Some_key_facts_about_avalanche-AN-v01_00-EN.pdf?fileId=5546d462584d1d4a0158ba0210977cde So this means how much "peak burden" can be taken within short time and how fast can the disspated power be "given off" by cooling. 1 4 Quote Link to comment Share on other sites More sharing options...
Popular Post Nils Posted June 26, 2019 Popular Post Share Posted June 26, 2019 2 hours ago, Unventor said: I think that is a question for your dealer... It still comes back to the manufacturer though. Someone will have to carry the cost, and unless the manufacturer is willing to admit to any fault and to accept the cost of the replacement boards, you'd have a hard time persuading most sellers to pay for this out of their own pocket. In Marty's case, or in anyone's who actually had their board fail, it's another matter as it's then a faulty instance that needs to be addressed. For eWheels and Jason it might be a different story (and hopefully their relationship with Gotway allows for better solutions where eWheels doesn't have to carry this themselves), but that level of service is applauded for a reason - it's not standard. So for @Han Vo's earlier question, I'd say that yes, unless Gotway admits to the fault and offers to shoulder the cost then generally speaking you'd have to first actually burn up your board before you'll get a replacement. Just checked with my own seller on Ali, and the response was that if Gotway offered replacement boards I'd get it for free, but they said Gotway's response was that they only received reports of 6 failures for a batch of 600 which they considered normal. Now, we all here know that there's nothing normal about this, but there you go. 3 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Chriull Posted June 26, 2019 Popular Post Share Posted June 26, 2019 9 minutes ago, Nils said: Just checked with my own seller on Ali, and the response was that if Gotway offered replacement boards I'd get it for free, but they said Gotway's response was that they only received reports of 6 failures for a batch of 600 which they considered normal. Now, we all here know that there's nothing normal about this, but there you go. Make an overheat hill party and destroy the boards, so the numbers go up 3 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Dzlchef Posted June 26, 2019 Popular Post Share Posted June 26, 2019 3 hours ago, Marty Backe said: If you bought your wheel from EWheels you should be good. Jason is getting a shipment of new boards. BTW, these boards use the HY5110 MOSFET I wonder if I shouldn't try Overheat Hill once I safely have my replacement board in hand? If mine makes it then you should feel confident that the replacement board should do the same. Well, unless it then allows too much current to flow down the line... 5 Quote Link to comment Share on other sites More sharing options...
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