Search found 48 matches

by ProEV
Mar 11 2020 6:01pm
Forum: E-vents
Topic: EV Fun Run North Carolina (NCCAR) March 20-23, 2020.
Replies: 2
Views: 461

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 below. Than...
by ProEV
Jun 29 2019 10:18am
Forum: Motor Technology
Topic: Arduino sketch to control and read ASI BAC Controller
Replies: 1
Views: 553

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 with...
by ProEV
May 24 2019 2:25pm
Forum: Motor Technology
Topic: Can any FOC or sinewave sensorless controller handle an astro 3220?
Replies: 24
Views: 1467

Re: 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 not inst...
by ProEV
May 24 2019 9:59am
Forum: Motor Technology
Topic: Can any FOC or sinewave sensorless controller handle an astro 3220?
Replies: 24
Views: 1467

Re: 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 a m...
by ProEV
May 29 2018 3:19pm
Forum: Battery Technology
Topic: Reprogramming Elcon charger, was this ever solved?
Replies: 0
Views: 219

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 avoid ope...
by ProEV
Feb 11 2017 10:07am
Forum: Battery Technology
Topic: Best series/parellel set up for lipo pack
Replies: 9
Views: 1020

Re: 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 type of tra...
by ProEV
Feb 04 2017 11:00am
Forum: Battery Technology
Topic: Best series/parellel set up for lipo pack
Replies: 9
Views: 1020

Re: 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 way to ge...
by ProEV
Feb 01 2017 7:47pm
Forum: Battery Technology
Topic: Best series/parellel set up for lipo pack
Replies: 9
Views: 1020

Re: 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 the loa...
by ProEV
Feb 01 2017 10:37am
Forum: Battery Technology
Topic: Best series/parellel set up for lipo pack
Replies: 9
Views: 1020

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 total o...
by ProEV
Dec 06 2016 3:01pm
Forum: Motor Technology
Topic: Modbus send help for communicating with controller
Replies: 6
Views: 946

Re: 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 the ...
by ProEV
Dec 03 2016 4:07pm
Forum: Motor Technology
Topic: Modbus send help for communicating with controller
Replies: 6
Views: 946

Re: Modbus send help for communicating with controller

If you can change parameters with BacDoor, I'd suggest running a serial port monitor program to see what it's sending that you're not. 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 ...
by ProEV
Nov 29 2016 1:36pm
Forum: Motor Technology
Topic: Modbus send help for communicating with controller
Replies: 6
Views: 946

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 able t...
by ProEV
Nov 28 2016 1:45pm
Forum: E-Vehicles General Discussion
Topic: Formula E drivetrains ?
Replies: 54
Views: 7309

Re: Formula E drivetrains ?

Fortunately, it won't matter, every single ICE track lap record will fall in less than 5 years anyways. It just will be unlikely to occur at an FIM sanctioned event. Possibly. 'Open Class' electric race cars with computer aided 4 wheel independent drive and intelligent active aerodynamics can do it...
by ProEV
Nov 19 2016 10:32am
Forum: Motor Technology
Topic: Modbus send help for communicating with controller
Replies: 6
Views: 946

Modbus help with Grin Technology BAC2000 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 'except...
by ProEV
Nov 09 2016 1:01pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

I have been doing a bunch of work with this. Here are my recommendations: -get comms working via modbus -poll necessary registers to do whatever feedback control you're interested in -Connect a digital output to the pedal assist sensor input and or throttle input. Adjust the frequency of the pulses...
by ProEV
Nov 09 2016 10:39am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

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 so 2048...
by ProEV
Nov 09 2016 10:33am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

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 getting t...
by ProEV
Oct 31 2016 6:56pm
Forum: Motor Technology
Topic: help me chose a motor for my electrathon racer
Replies: 20
Views: 2962

Re: help me chose a motor for my electrathon racer

In terms of overall efficiency it's always better to use a motor capable of significantly greater power than is required for the application at the voltage you run. In addition, as previously noted using different wording, a larger motor of similar peak efficiency is worth its extra weight due to l...
by ProEV
Oct 31 2016 6:23pm
Forum: Motor Technology
Topic: help me chose a motor for my electrathon racer
Replies: 20
Views: 2962

Re: 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 efficien...
by ProEV
Oct 27 2016 1:26pm
Forum: Motor Technology
Topic: help me chose a motor for my electrathon racer
Replies: 20
Views: 2962

Re: 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 efficiency...
by ProEV
Oct 17 2016 12:13pm
Forum: Motor Technology
Topic: help me chose a motor for my electrathon racer
Replies: 20
Views: 2962

Re: 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 mounted t...
by ProEV
Sep 23 2016 10:14am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

So next question: Does anyone know the format of the serial signal from the controller? The controller is reading amps, volts and rpm and outputs it to the Bacdoor program. I can read the serial signal into an Arduino, but what will the format be? U want make a handhold debug terminal based on Ardu...
by ProEV
Sep 21 2016 6:18pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

<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 setting....
by ProEV
Sep 21 2016 12:56pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

Hi iser, Thanks for the suggestions. The current regulator bandwidth was 1500 radians. I have tried 0, 1,000, and 2,500. It does not seem to effect the current drop out. I do not see a PLL bandwidth, nor do I see a specific way to change Kp. The Bacdoor program says when Current Regulator is non zer...
by ProEV
Sep 21 2016 12:29pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1236
Views: 244573

Re: Compact Field Oriented Controller, ASI + Grin, limited r

Lakebod, If the error messages are the same as the Bacdoor program: 6 FLASHES Communication Timeout The controller has not received a valid communications packet over an elapsed time that exceeds the Command timeout threshold 7 Flashes Instantaneous Phase Current The instantaneous motor phase curren...