Search found 5338 matches

by casainho
Oct 22 2012 6:47am
Forum: Motor Technology
Topic: Simple BLDC controller
Replies: 407
Views: 69172

Re: Simple BLDC controller

Hello Jeremy Harris. Thank you for sharing all this information and knowledge. I am trying to build the "EBike Smart Controller (OpenSource)" but is programmed and with cheap Bluetooth module so we can configure the controller on the fly and also get information with SmartPhones about volt...
by casainho
Oct 21 2012 5:37pm
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I ended the schematic, soon I will buy the needed components from Farnel online and assembly the prototype.

My current schematic (sources on github):
Image
by casainho
Oct 20 2012 6:22pm
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I am finding difficult to understand BEMF circuit and needed firmware and so I decided I will build a working prof of concept controller using hall sensors. I will use KU63 plus ACS756SCA-100B (current sensor) and the Bluetooth UART module. I started to draw some schematics and put them on github: h...
by casainho
Oct 11 2012 6:08am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

Hello Laurent. I am looking at the schematic components values, as I am trying to understand it better and make a BOM. I am thinking if I can invest on this board/project and use it to control my electric bicycle of 48V and motor of 500W (but for start I will test with my old system of 24V and 250W ...
by casainho
Oct 09 2012 10:52am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

The "Windmill" strategy start-up relies one the motor already rotating and simply waiting for a few ZC to synchronize the timing loop. This requires the user to push the motor/vehicle to start. Ok, thanks. The start-up by position/current sensing is an active way to start the motor by exc...
by casainho
Oct 08 2012 4:31am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

Hello Laurent. Could you please tell me what is: 1 - the meaning of AUTO_STEP and STEPPING_ON flags on BMC_STATUS variable? When they are 1, what system is supposed to do? 2- Windmill strategy for start-up you mention on the code is the same as you explained here? http://endless-sphere.com/forums/vi...
by casainho
Oct 06 2012 6:06pm
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

Arlo1 wrote:Just found this thread. Very cool we need more diy controllers!! :)
I think we need OpenSource controller AND with commercial/professional support.
by casainho
Oct 06 2012 6:05pm
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

grindz145 wrote:Sweet little dev board is that LPC2103 processor an ARM9?
No, it is "old" ARM7, but really cheap. Should be more than enough to the task and I can change at any time if needed.
by casainho
Oct 05 2012 3:26am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

Is this the latest version of the projekt? I would like to play with this, and then maybe make a board which can drive a 80100 on 80V. No, it's quite out of date. I'm planning on releasing new soft but I haven't had the time to finalize everything I wanted. They are many upgrade to handle "hig...
by casainho
Oct 02 2012 9:39am
Forum: EBike Technical
Topic: Shimano Deore XT brake lever switch with Hall effect sensor
Replies: 39
Views: 11819

Re: Shimano Deore XT brake lever switch with Hall effect sen

Thank you for sharing this information!!!

And DX sells strong magents VERY cheap: http://dx.com/p/super-strong-rare-earth ... -pack-4248
by casainho
Sep 29 2012 2:14pm
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I started to document on github wiki the test I made with KU63 controller and Cute85 24V motor. I am also documenting the pin connection between KU63 controller and LPC2103 microcontroller - here:

https://github.com/casainho/EBike-Smart-Controller/wiki
by casainho
Sep 25 2012 8:08am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

Hi Casainho, I'm afraid you are a bottom of a steep learning curve and I don't really have time to help you with the basic principle of sensorless BLDC control, there is a lot literature out there for that. I'll keep an eye on your progress here and help if I can. Thanks. Ok, thank you. I will keep...
by casainho
Sep 25 2012 7:47am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

It looks like you are running in open loop, so this is the expected behaviour. This mode of operation is not really usable as you can't control timing or torque, however it's a good 1st step to understand brushless motor control :) Yes! I need to feel to understand. BEMF sensing/timing and close lo...
by casainho
Sep 24 2012 5:59am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open Sensorless BLDC controller

walls99, could you please tell me if you think the motor could work (with load, like on a bicycle wheel, starting from 0 velocity) only with current feed-back and not BEMF? I got my motor running but without BEMF. 9yG4NSVBGEs I made some simple but interesting tests. With 15% duty-cycle and 10ms the...
by casainho
Sep 18 2012 2:36am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open BLDC controller

Is this the latest version of the projekt? I would like to play with this, and then maybe make a board which can drive a 80100 on 80V. No, it's quite out of date. I'm planning on releasing new soft but I haven't had the time to finalize everything I wanted. They are many upgrade to handle "hig...
by casainho
Sep 11 2012 4:31am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I made some simple but interesting tests. With 15% duty-cycle and 10ms the motor were running very slow (about 12 RPMs, motor Cute85 for 20'' wheel). But I were using the variable power supply and I could change the power applied to motor by defining the voltage supply. (Case 1) I found that with a ...
by casainho
Sep 10 2012 9:21am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

The motor runs!! :-) But the firmware starts only the motor at a fixed frequency commutations (5ms, measured with my Cute85 motor at start/slow velocity) and at fixed duty-cycle. Here is the video I recorded: 9yG4NSVBGEs The firmware for it is here: https://github.com/casainho/EBike-Smart-Controller...
by casainho
Sep 10 2012 5:11am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I had another idea: KUxxx controller just misses current sensor. Why not add the sensor current (ACS756SCA) to the input of battery on KUxxx? ACS756SCA-100B sensor IC on Open Sensorless BLDC controller schematic is in series of the negative of battery. It should very easy to apply the sensor on the ...
by casainho
Aug 31 2012 5:43am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I am slowing working on this project. The recent actions were: - working together with luvxu user. He did already a few commints of the firmware to github. - testing of the firmware ideas for startup of the motor (without success) - planning for use the hardware of Open Sensorless BLDC controller . ...
by casainho
Aug 31 2012 5:33am
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open BLDC schematics and layouts

Hey, thanks for sharing!! I am planning to buy the components and assembly by hand on a perfboard the power section. I really like the modular way of the system. I also want to use the ARM processor/board I am familiar with and program in C instead of assembly. I also want modular because I plan to ...
by casainho
Jun 02 2012 5:13am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

Just when I think I'm starting to become the local "E-Bike Expert" I find a thread like this and I realize how much of a beginner I really am! Let me just say that while I know almost zero about electrical engineering this is almost EXACTLY what I've been looking for! Ever since I first l...
by casainho
May 28 2012 8:48am
Forum: EBike General Discussion
Topic: Bafang Bpm, how many RPM?
Replies: 126
Views: 47325

Re: Bafang Bpm, how many RPM?

I did abandon the idea to use the front wheel Bafang BPM because it is to strong for me:



Please read more here: Bafang BPM 500W broke again the aluminium fork dropouts
by casainho
May 27 2012 4:06pm
Forum: Motor Technology
Topic: Open Sensorless BLDC controller
Replies: 197
Views: 81608

Re: Open BLDC controller

walls99, great news!! Will you design a PCB for this controller? I would use if it could control my 24V 250W electric bicycle. I could buy the components, assembly and test my board. Why don't you put the firmware and schematic/board sources on Github (as other Open Source projects)?? i would reques...
by casainho
May 26 2012 11:00am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

Allthough I've no so much time to spend, I'dd like to join the project. I'm not stuck to Arduino platform. Just started with a Netduino, a Wifi module and .net micro framework to play arround. Joining means for now to use KU63/93/123 controller(s) and developing and/or testing firmware. KU63 costs ...
by casainho
May 25 2012 11:28am
Forum: Motor Technology
Topic: Smart EBike: Dashboard + Motor controller + Battery BMS
Replies: 166
Views: 57313

Re: EBike Smart Controller (OpenSource) -- let's make it

I just got my last order from BMSBattery and I got 2 x KU63 24V controller. I am out of time on this days but I plan to continue working on the project. Last time I had problems (short circuits??) on mosfets...