{"id":5660,"date":"2022-04-24T20:28:59","date_gmt":"2022-04-24T18:28:59","guid":{"rendered":"http:\/\/www.runstenracing.se\/?p=5660"},"modified":"2022-06-30T09:15:06","modified_gmt":"2022-06-30T07:15:06","slug":"running-the-evant-frying-the-controller-and-finishing-up-with-replacement","status":"publish","type":"post","link":"https:\/\/www.runstenracing.se\/?p=5660","title":{"rendered":"Running the Evant, frying the controller and finishing up with replacement"},"content":{"rendered":"

So, yes, this happened.. :\/<\/p>\n

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After running the evant for two charges the controller died. It starts, I can connect to it using the USB dongle but as soon as I give throttle input I get an overcurrent error.<\/p>\n

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Measuring the phases it turns out that one phase is shorted to B-, typical mosfet failure. QSmotor, that I bought the motor and controller from, was reluctant to send me a new controller even though they state there’s a 1year and 3 month warranty period. Somehow they say I damaged the controller but it’s virtually impossible to damage the controller in this way except when assembling it. In the end they offered for me to send the controller back to be repaired, or pay half the price for a new controller.. I chose to send it back, which it turned out was not a viable option at all.. so..
\nThe problem with buying a new controller at half price is that Shanghai is shut down due to Covid and the factory is closed.. so QS couldn’t really tell me when I could get a new controller, so the Evant project halted..<\/p>\n

Until..<\/strong><\/p>\n

I’ve already started planning my next project. It’s going to be a couple of awesome dirtbike replacements.. powerful LightningRod bigblock motors and matching ASI BAC controllers. More on this later. The thing is, I’ve already bought and got the motors and controllers. So.. I started out connecting my 50A VESC to the QSmotor, just to try it out, and sure – it runs. Wierd that the 800A APT96800 controller got damaged from pushing the same amount of power that a 50A VESC can handle.. well well..<\/p>\n

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For my build I’m going to use the ASI BAC4000 controller. It can handle 400+ phase amps but is limited to 72V max nominal voltage on the batteries. Since I’ve already built the 48V packs that’s going to be utilized in future projects as well, I’m running the Evant on two 48V packs in parallell yielding 60Ah and 2,9kWh. After discussing the matter with mr HV on the HV discord I connected the BAC4000 to the QSmotor and made connectors to precharge and connect the two packs in parallell.<\/p>\n

One problem with this setup is that the QS motor uses an encoder to keep track of the rotor position while the ASI BAC only supports hall sensors.
\nBut it turns out the BAC4000 actually handles the motor better in sensorless mode than the APT96800 did using the encoder. \ud83d\ude00
\nWith the APT the motor sometimes stalled, loosing sync, requiring me to turn the machine off and on again for it to regain sync. The BAC4000 hasn’t lost sync once during the hours of use I’ve put it through.<\/p>\n