The E-Go survived the morning trip to work. I was happy until just a couple minutes from home in the afternoon. It's dead and is lying upside down to dry now.
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What does battery cutoff mean? Now I know. This had been a full 2-hour trip and voltage dropped pass 33.0V for the very first time, to something like 32.8V when I checked. When battery cutoff occurs, the motors still run but at a super slow speed. So slow that I just turned the power off and pushed my way home. The voltage ran back up a bit to 33.0V when I turned it back on at home These are the BLDC configurations of my DIY, except that I use FOC instead of BLDC as my motor type. FOC mode gives me a bit less startup torque but the motors are basically silent.
The left rear wheel was coming off my DIY again after a 2-hour trip. (Voltage dropped from 41V to 33V, not too bad at all.) The silicone sealant I used just don't stick to metal as good as I wanted. It did hold onto it for a long while. It's not bad comparing to a previous brand of silicone sealant which slid right off the motor after drying. The (dark gray) silicone sealant did stick to (blue) rubber very well. The problem with this particular wheel is that the recess was bored way too deep, giving it space to slide out even with the end cap tightly secured. Filling the excessive recess with silicone sealant. Let's see how long this time the fix could last.
Belt drive systems (in BLDC mode) are so noisy that I can hardly wait to put my DIY back into action. I tear the wrapping up and turn it on. OMG, 40.9 volts! Dropped less than 1 volt over the winter! Good to go already!
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DarrylTaking up longboarding... Archives
November 2018
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