It's interesting that the options go all the way up to 80V. Studying the PCB, there is an interesting resistor array that appears to be in parallel with one of the resistors that form what I'm assuming is part of the voltage divider that is feeding the LVC measurement to the MCU.Īny of these resistors can be jumpered to GND to change the balance of the voltage divider. If I connect my usual 12S pack (which was hot off the charger and running at 49.9V), the EBS feature DOES NOT work. When I have the controller connected to a 10S lithium pack (whose state of charge was at around 39V when I was testing), the EBS feature works as expected. This controller claims to be a "36/48V" unit, and to auto-detect its power source.
Now - there *is* the often found tie between the EBS (or regen, if true) function and LVC. I won't be able to prove this until I try the controller out on a bike with a Cycle Analyst on it. My suspicion is that this isn't actually doing any regen - it's just shorting the phase wires to get the braking effect. Sure enough, if you apply the brake (I have it wired to the "brake low" input), the motor is slowed down to a complete stop. These come connected together out-of-the-box. There is a pair of grey wires whose function is claimed to be "EBS". Short black to grey, and the top speed is reduced. There are three speed settings - leave the connector open, and the motor runs to the middle setting. There is a speed connector on there that does the expected. If it's spinning the wrong way, you touch the throttle and it reverses - disconnect the green wires, and this setting is remembered). The auto-learn feature for the phase/hall wiring worked well (you connect together the green wires, power up the bike, and it starts spinning the wheel.
XLD BRAIN POWER MOTOR CONTROLLER MANUAL INSTALL
It doesn't have the hookup for the external LCD, so I'm not sure how radically different it is at its core.Īfter changing out a lot of the connectors for something I can actually attach to a bike (Andersons and JSTs), it did install painlessly. I haven't worked my way through all of the threads yet, but this is flavour I now have in hand. Upon seeing this thing in person, and revisiting this thread, it occurs to me that variants of this thing - at least units that seem to run with the same unique MCU - have been discussed on ES for some years. Gotta say, for $40 (Canadian), it seems put together better than expected, though the bar was low. OK, so the first of the XLD controllers arrived (the smaller one, from Amazon: ).
Will chime in again when I have one of these puppies in hand. There's also a "speed" connector that looks suspiciously like it may act like the speed selector pads on the Xie Chang controllers. Both the regen and a phase learning feature, for example, on one of the controllers I have coming is enabled by connecting together the two like-coloured wires that hang out of the unit for each of the associated functions. There is very little information on these, but the standout so far is that they appear to use floating external wires where one would normally expect to find a jumper on the PCB. But some of my favourite stuff is the stuff I paid the least for, so who knows? They claim to be sine wave units, and I paid less than $100 Canadian for the pair of them - so I'm actually coming at this with low expectations. When they arrive, I'll jump in to reverse engineering fun of it all. One is coming from China, and the other from Amazon. I keep tripping over these XLD "Brainpower" controllers - and was intrigued enough to order two flavours of them (neither with LCD, but with two different power ratings).
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