Rywokast Posted July 23, 2019 Share Posted July 23, 2019 41 minutes ago, erk1024 said: What kind of mosfets does KS use anyway? Why is there no mosfet talk in the KS forums? One mosfet, two mosfet, three mosfet blew My mosfet, his mosfet, your mosfet glue? (insomnia is making me punchy!) someone will correct me if im wrong im sure but i believe from the 16 on they used 247s, but less than gotway.. except for the 16X now which i heard they just recently decided to double.. the reason you hear nothing about them is because its extremely uncommon for them to fail due to the much more conservative firmware, and other safety measures... but the reason you dont blow a mosfet on a kingsong is because you blow the fuse.. it SHOULD be the first thing to go, im not aware of any gotway that utilizes fuses.. i know kingsong and inmotion do and im not sure about ninebot 3 Quote Link to comment Share on other sites More sharing options...
Jeff Earl Posted July 23, 2019 Share Posted July 23, 2019 1 hour ago, erk1024 said: What kind of mosfets does KS use anyway? Why is there no mosfet talk in the KS forums? I think the recent notoriety around Gotway’s missteps have taken some of the heat (pun intended} off of Kingsong. Thanks to the fine work of folks like @Marty Backe and @Phil McLaughlin evaluating the Nikola; Kingsong has been able to avoid the immediate spotlight. But it does look like KS has been trying to up their MOSFET game with the 16x by doubling the device count and selecting potentially improved components. I presume that increasing the MOSFET count should reduce the per-component thermal/current load--increasing performance margins and longevity. Their marketing materials also boast of "imported" TO-247 MOSFETs. I’m not sure how to interpret Imported other than to assume they are not generic Chinesium parts. Perhaps they are being sourced from a Japanese or US manufacturer. I was hoping for some high-res photos showing the part numbers, but it appears that they are sandwiched between the board and the heat-sink. Is this a good idea? Seems like it might be challenging to ensure even contact between the components and the heat-sink without stressing the board or the device leads??? Maybe not... I guess we will know soon enough if these design decisions prove themselves in the field once the 16x makes it out in the world. I, for one, have my fingers crossed. 1 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted July 23, 2019 Share Posted July 23, 2019 "Imported" means not from China. Same as with the batteries. They have to stress this as everyone (even the Chinese) are wary of shitty/fraudulent/dangerous (hoverboard battery fires) Chinese electronics components. @Rywokast's explanation is exactly right. Though in truth Gotway has not had any mosfet problems since early 2017 either. The Nikola thing is just a serious assembly error that caused the mosfets to die, but both the older/no-longer-used Nikola mosfets and especially the new big Nikola mosfets are 100% fine and unproblematic. I expect the 16X to have a more aggressive firmware resulting in higher oomph/torque, just like the Nikola. Maybe that's why they increased their mosfet count despite the 18XL never having any mosfet problems. 1 1 Quote Link to comment Share on other sites More sharing options...
EUC Custom Power-Pads Posted July 23, 2019 Share Posted July 23, 2019 2 hours ago, erk1024 said: What kind of mosfets does KS use anyway? Why is there no mosfet talk in the KS forums? One mosfet, two mosfet, three mosfet blew My mosfet, his mosfet, your mosfet glue? (insomnia is making me punchy!) Looks to me like 6 X 247s. 1 Quote Link to comment Share on other sites More sharing options...
erk1024 Posted July 23, 2019 Share Posted July 23, 2019 (edited) 2 hours ago, Jeff Earl said: But it does look like KS has been trying to up their MOSFET game with the 16x by doubling the device count and selecting potentially improved components. Kingsong needs the 16X to be competitive because the Nikola has turned out to be an excellent wheel. Edited July 23, 2019 by erk1024 1 Quote Link to comment Share on other sites More sharing options...
Unventor Posted July 23, 2019 Share Posted July 23, 2019 Please let's get back to the title of the thread. Discussions of other wheels, brand and components have far better theards they belong than this. Of course some side tracking can be good, but this is getting ridiculous. 1 1 Quote Link to comment Share on other sites More sharing options...
Popular Post The Fat Unicyclist Posted July 26, 2019 Popular Post Share Posted July 26, 2019 On 7/23/2019 at 10:16 PM, Rywokast said: im not aware of any gotway that utilizes fuses.. All Gotway wheels have fuses... They are the "long copper" type that run between the batteries, control board and motor - You probably haven't noticed them as they are covered in plastic tubing (often red and black). You're welcome! 4 Quote Link to comment Share on other sites More sharing options...
Unventor Posted July 26, 2019 Share Posted July 26, 2019 2 hours ago, The Fat Unicyclist said: All Gotway wheels have fuses... They are the "long copper" type that run between the batteries, control board and motor - You probably haven't noticed them as they are covered in plastic tubing (often red and black). You're welcome! That is simply plain funny. 1 Quote Link to comment Share on other sites More sharing options...
Popular Post US69 Posted July 26, 2019 Author Popular Post Share Posted July 26, 2019 (edited) On 7/23/2019 at 3:25 PM, erk1024 said: Kingsong needs the 16X to be competitive because the Nikola has turned out to be an excellent wheel. Actually KS is using the big 247MOS way longer since Gotway...to be concrete since the KS16S and KS18AY over 2 years ago... That's why there is no talk About the Mosfets KS is using. As this since Long time is no Problem anymore! Edited July 26, 2019 by US69 1 6 Quote Link to comment Share on other sites More sharing options...
Popular Post US69 Posted July 26, 2019 Author Popular Post Share Posted July 26, 2019 On 7/23/2019 at 1:31 PM, Jeff Earl said: But it does look like KS has been trying to up their MOSFET game with the 16x by doubling the device count and selecting potentially improved components. I presume that increasing the MOSFET count should reduce the per-component thermal/current load See my answer above…. Mosfets are a Long time no Problem on KS wheels. Actually 12MOS are not even a bit safer than 6MOS. The only reason why the 16X received now 12 instead of 6Mosfets is to have a better thermal heat getaway to the heatsink, as with the 16X the Motor power got stronger. 2 3 Quote Link to comment Share on other sites More sharing options...
EUC Custom Power-Pads Posted July 26, 2019 Share Posted July 26, 2019 Where are the other 6 MOSFETs located? Can't see it on the pictures and thought there are only 6. Quote Link to comment Share on other sites More sharing options...
Kens Posted July 26, 2019 Share Posted July 26, 2019 18 minutes ago, buell47 said: Where are the other 6 MOSFETs located? Can't see it on the pictures and thought there are only 6. Most likely in the middle of the board like Nikola: 3 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted July 26, 2019 Share Posted July 26, 2019 See that row of screws in the middle of the board? They're holding the other 6 mosfets. Only thing you see on this side is the screws, just like the Gotway boards. 3 Quote Link to comment Share on other sites More sharing options...
EUC Custom Power-Pads Posted July 26, 2019 Share Posted July 26, 2019 This screws? 1 Quote Link to comment Share on other sites More sharing options...
Unventor Posted July 26, 2019 Share Posted July 26, 2019 (edited) 55 minutes ago, buell47 said: Where are the other 6 MOSFETs located? Can't see it on the pictures and thought there are only 6. I think you can spot the scolding here (se my blue box marking) : Edited July 26, 2019 by Unventor 1 Quote Link to comment Share on other sites More sharing options...
meepmeepmayer Posted July 26, 2019 Share Posted July 26, 2019 21 minutes ago, buell47 said: This screws? Yes exactly. Quote Link to comment Share on other sites More sharing options...
CampDylan Posted July 27, 2019 Share Posted July 27, 2019 On 7/19/2019 at 8:01 AM, Marty Backe said: Oh God, that's perfect Omg, tell me that’s just a tiny woman’s hand??! If not, that wheel housing is HUGE! Quote Link to comment Share on other sites More sharing options...
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