Hi, everybody. I have an electric unicycle (EUC) that has numerous issues reported by other owners on dedicated forums and on social media. The main issue with this unicycle is that it cuts out while riding it, which can led to severe accidents or even death (it has a max speed of 40mph). These machines are great fun, very practical and extraordinary compact, which made them very popular with niche riders. Unfortunately, from the beginning this form of transportation was plagued with problems: motor cut outs, instantaneous combustion of the batteries, poor water proofing, weak cases and other design, manufacturing and quality issues. Almost all are fabricated in China at this moment, with another producer in Korea, if I remember well.
To make a long story short, one of the producers that was known to make a little bit more safe and more reliable EUCs, InMotion, has started the production of a model(V12) that from the specs that were provided by the manufacturer promised to be of much better quality and with enticing speed and manoeuvrability. At this moment many received their V12s and alarmingly a lot of cut outs and accidents, resulting in bad injuries, started being reported. The reason for these failures are the burning MOSFETs: 12x Infineon IPP023N10N5 . The EUC has a 100.8V battery. The manufacturer, InMotion, claims that they received boards with bad quality MOSFETs from their controller board supplier. From what we read on this forum and other similar sites, many of the owners of this EUC, including myself, believe the MOSFETs were of underrated power for the voltage available on this unicycle. The battery is of 1750WH capacity and the motor is 2500W nominal, 5000W peak power. The only brake available on a EUC is regenerative brake. We had to become investigators of these problems ourselves, since we have little trust in what the manufacturer tells us. Would you please help me in clarifying this issue?
To make a long story short, one of the producers that was known to make a little bit more safe and more reliable EUCs, InMotion, has started the production of a model(V12) that from the specs that were provided by the manufacturer promised to be of much better quality and with enticing speed and manoeuvrability. At this moment many received their V12s and alarmingly a lot of cut outs and accidents, resulting in bad injuries, started being reported. The reason for these failures are the burning MOSFETs: 12x Infineon IPP023N10N5 . The EUC has a 100.8V battery. The manufacturer, InMotion, claims that they received boards with bad quality MOSFETs from their controller board supplier. From what we read on this forum and other similar sites, many of the owners of this EUC, including myself, believe the MOSFETs were of underrated power for the voltage available on this unicycle. The battery is of 1750WH capacity and the motor is 2500W nominal, 5000W peak power. The only brake available on a EUC is regenerative brake. We had to become investigators of these problems ourselves, since we have little trust in what the manufacturer tells us. Would you please help me in clarifying this issue?