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    Motorsport, Racing, The Future

    Electrathon of Tampa has managed an abbreviated season. They have a well organized solid volunteer group. Outdoor, Social distancing, mandated masks, teams staying in their bubble. When people are respectful and cooperative, it can be done. https://electrathonoftampabay.org/www/
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    Motorsport, Racing, The Future

    Electrathon is a great grassroots EV race series. We race on both permanent tracks and parking lots. It is inexpensive. The rules allow innovation; basically a set weight of battery and the drivers all ballasted to the same weight. 3 or 4 wheels. Ebike motors and controllers work well. One hour...
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    EV Fun Run North Carolina (NCCAR) March 20-23, 2020.

    Passing this on in case anyone is that direction: Greetings Everyone, Attached you will find the EVent flyer with an RSVP link at the bottom. Please complete the RSVP form as soon as possible if you plan to attend. If you have any questions just let me know. A tentative schedule is shown...
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    Arduino sketch to control and read ASI BAC Controller

    Hi, Here is a basic demo sketch to use the Modbus protocol to read motor temperature, RPM, voltage and current from a ASI BAC controller and write to the controller to change the percentage of full power available. This is tested using a Ardunio Mega 2560 and a ASI BAC2000. I have not tested it...
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    Can any FOC or sinewave sensorless controller handle an astro 3220?

    We try and gear for 12,000 but I think 11,500 is the highest we have run. Electrathon tactics rather than any mechanical or electrical limit. The sensorless start has a brief delay which costs us at the start of a race. We would like to add sensors and go sensor start to sensorless but have...
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    Can any FOC or sinewave sensorless controller handle an astro 3220?

    I have been running a BAC2000 with a Astro 3220 for around 2 years on an Electrathon racing vehicle. I use a 66.6 volt nominal lithium pack. It all seems to work well together. The ASI website has enough information to set up Modbus communication, so I am using an Arduino to get data. I also run...
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    Reprogramming Elcon charger, was this ever solved?

    Hi, I have a ElCon charger TCCH-72-16. It is a nice effective charger but I now have the wrong 10 voltage curve programmed in. I have search both endless sphere and other forums and found many threads that start to try and reprogram ElCons but I do not find any instructions. I am trying to...
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    Best series/parellel set up for lipo pack

    Hi Scooterman101, You wrote "I am now starting to use 2x 6s packs together to make a 12s pack. " So think of think of taking 3 of your 12s packs side by side instead of adding them lengthwise. Same voltage but more amp hours. The pack capacity is 980 Watt hours. Range is dependent on the...
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    Best series/parellel set up for lipo pack

    Thanks for your replies, Amberwolf I missed your idea of connecting the balancing leads so that each cell is connected in parellel without having to undo the pack. That is clever. Dogman Dan The electrathon rules state battery capacity is determined by manufacture specs so finding a clever...
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    Best series/parellel set up for lipo pack

    Amberwolf, I guess my question is not clear. Let me try and re-phrase it. The simplist set up is put 3 packs in series and use three parellel strings (which is choice A, 18 total cells in 3 strings). Do I gain anything by cross connecting the parelleled strings (choice B)? Would this balance...
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    Best series/parellel set up for lipo pack

    Hi, The series I am racing in allows LiPo packs with a maxium rated capacity of 1,000 Watt hours. I have purchased 9 of these 108 Watt hours packs that I need to wire together to make my racing pack : https://hobbyking.com/en_us/rhino-4900mah-6s-22-2v-25c-lipoly-pack.html This will give me a...
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    Modbus send help for communicating with controller

    I am planning on using 'battery current limit' to do throttle mapping. The Arduino reads RPM and then calculates the most efficient current for that RPM. It then sends to the controller a new 'battery current limit' that limits full throttle to the most efficient current. The driver just drives...
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    Modbus send help for communicating with controller

    Excellent idea but one I was hoping someone else had already done. What I discovered is BACDOOR is using the Function 16 Set Mutiple Registries and just writing to one registry. I was using a demo version of Simply Modbus http://www.simplymodbus.ca/index.html which is great to understand...
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    Modbus send help for communicating with controller

    Hi, I posted this on the Bike Technical forum section a few days ago but had no luck, so I thought I would try here. I need some help from people with greater knowledge of Modbus. I have had sucess reading data from the controller using function 3, READING HOLDING REGISTRIES but have not been...
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    Formula E drivetrains ?

    Possibly. 'Open Class' electric race cars with computer aided 4 wheel independent drive and intelligent active aerodynamics can do it if the money is there. The emphasis being on Track Lap Record, not Race Lap Record. Batteries are heavy, so if you want to win, you have to be efficient. The...
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    Modbus send help for communicating with controller

    Hi, I need some help from people with greater knowledge of Modbus. I have had sucess reading data from the controller using function 3, READING HOLDING REGISTRIES but have not been able to write to the controller using function 6, SET SINGLE REGISTRY. When I try and write a value, I get back...
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    Compact Field Oriented Controller, ASI + Grin, limited run

    Cycborg, Thanks for the lead. I did contact ASI and they said best to go through Grin. I do not really think this is a question that falls under reasonable tech support :D I can use Modbus to read from the controller which is great. I do not want to have my Arduino calculate the right...
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    Compact Field Oriented Controller, ASI + Grin, limited run

    Hi, I am working on writing a program to make the BAC2000 system move effective for Electrathon racing. I am able to read parameters using Modbus. For example I send: 01 03 00 9B 00 01 F5 E5 And get back 01 03 02 08 00 BF 84 Which tells me that the parameter 155 Battery Current limit is 0800...
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    Compact Field Oriented Controller, ASI + Grin, limited run

    Hi, Some thoughts on instantaneous phase overcurrent error. I am running an Astro 3220 4t on an electrathon race vehicle. I had it running sensorless and without errors. I run a sprocket on the motor with a chain to a larger rear wheel. Without making any changes in the software, I started...
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    help me chose a motor for my electrathon racer

    Hi John, The question I face is whether the penalty of the additional weight of the greater power motor offsets the gains in efficiency. Since the race conditions are very specific, I came up with a method to estimate of which way will give me more Watt hours to move each pound over the race...
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    help me chose a motor for my electrathon racer

    Hi Alex, Keep in mind the application, as stated in the first post of this thread. The vehicle has 947 Watt hours battery capacity for a 1 hour race. Ideally, I average 947 Watts all race. Since it is a road course, I will regen for the corners and accelerate out, so brief higher power less...
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    help me chose a motor for my electrathon racer

    The July 29 posting in this thread pretty much describes how I calculated what the most efficient RPM for the motor would be. I estimate the speed range I expect for the track and then gear the motor to try and stay in the most efficient RPM range. It also seems important to consider that...
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    help me chose a motor for my electrathon racer

    The Astro Flight 3220 4t motor arrived. I checked resistance between leads. .0367 ohms, .0340 ohms, .0385 ohms. Within measurement error tolerance of the .032 Astro Flight lists. I set up the BAC 2000 controller and get a no load battery current of 1.718 and 4789 rpm. They list 1.5 amps. I...
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    Compact Field Oriented Controller, ASI + Grin, limited run

    No. I want to make my Arduino Driver Displays Unit read amps, volts, rpm direct from the controller so that I can see per lap Power usage and lap times. I use an external shunt and voltage dividing circuit now.
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    Compact Field Oriented Controller, ASI + Grin, limited run

    <Under full throttle, the current suddenly drops to zero and then comes back up in about .32 of a second. It happens around twice during a three second full throttle run.> I found the answer. The regenerative brake pedal resting voltage was very close to the regenerative brake "on" minimium...
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