Search found 5792 matches
- Thu Mar 14, 2019 1:07 pm
- Forum: Inverters / Motor Controllers
- Topic: Inverter Firmware v4.12.R
- Replies: 27
- Views: 4777
Re: Inverter Firmware v4.12.R
Yes that version had the position tracker. It seemed to produce much more vibration on regen (you also reported that) so I ended up removing it. Can you test regen again (especially strong regen)
- Wed Mar 13, 2019 3:25 pm
- Forum: Inverters / Motor Controllers
- Topic: Inverter Firmware v4.12.R
- Replies: 27
- Views: 4777
Re: Inverter Firmware v4.12.R
I think I found it. In version 4.75 (uh, what happened to my version counting? Anyway, 4.75 is older than 4.12.R) I swapped sin/cos channels to mach the cable loom of the Leaf inverter. I think there is your problem. Can you swap sin/cos and try again?
- Tue Mar 12, 2019 8:06 pm
- Forum: Inverters / Motor Controllers
- Topic: Calibration of current sensors Melexis. [SOLVED]
- Replies: 3
- Views: 2561
Re: Calibration of current sensors Melexis. [SOLVED]
Oh yes, those instructions need an update. With the Melexis sensors "winding 10 times through both sensors" is no longer possible. So in fact the sensors must be calibrated when mounted onto the target bus bar or cable. Either calibrate them with low current - whatever your lab supply is a...
- Tue Mar 12, 2019 8:58 am
- Forum: Inverters / Motor Controllers
- Topic: Resolver Excitation with V2 mainboard
- Replies: 52
- Views: 11262
Re: Resolver Excitation with V2 mainboard
Yes that is how it should be. That said, in code I shift the field by 180° for reverse but it never quite runs in the same manner as in forward. But at least 5000 is in the right ball park. I use 55000 as default but that is found using an idle motor at 60V. So your value is probably better. EDIT: a...
- Mon Mar 11, 2019 8:23 pm
- Forum: Inverters / Motor Controllers
- Topic: Resolver Excitation with V2 mainboard
- Replies: 52
- Views: 11262
Re: Resolver Excitation with V2 mainboard
OK then. Can you privide insight how to rotate the other way? We almost burned oil inside transmission in reverse. Of course: So "red" always wants to be exactly opposite of "blue". Therefor if you start out with a field offset of 270° or -90° the rotor will rotate anti-clockwis...
- Mon Mar 11, 2019 7:44 pm
- Forum: Projects
- Topic: [DRIVING] Peugeot 406 coupe Pininfarina with Leaf motor and Ampera inverter [FINISHED]
- Replies: 102
- Views: 21692
Re: Peugeot 406 coupe Pinifirina with Leaf motor and Ampera inverter [FINISHED]
Nice project with lots of new approaches, I like it. How will you adapt the AC pipes to the new compressor?
I think the direction change logic you describe is already implemented in the inverter.
I think the direction change logic you describe is already implemented in the inverter.
- Mon Mar 11, 2019 1:00 pm
- Forum: Inverters / Motor Controllers
- Topic: Unlimited speed when fmax<20 [SOLVED]
- Replies: 2
- Views: 1843
Re: Unlimited speed when fmax<20 [SOLVED]
Indeed. In addition maybe the range of fmax should be limited to be at least 21Hz? Do you want to create another pull request?
- Mon Mar 11, 2019 12:57 pm
- Forum: Inverters / Motor Controllers
- Topic: Schetch for troubleshooting
- Replies: 3
- Views: 1302
Re: Schetch for troubleshooting
I meant the Article function here: https://www.openinverter.org/forum/app. ... e/articles
- Sun Mar 10, 2019 9:37 pm
- Forum: General
- Topic: Gallery / Garage
- Replies: 3
- Views: 990
Gallery / Garage
Its now one month ago that I offered VS to help fixing the Garage on "the old forum". Apparently they are not interested. So why don't we start one here? It's a powerful machine we're running on with 1TB of drive space so it can certainly handle a few pictures. What phpbb plugin would be a...
- Sun Mar 10, 2019 9:32 pm
- Forum: Inverters / Motor Controllers
- Topic: Schetch for troubleshooting
- Replies: 3
- Views: 1302
Re: Schetch for troubleshooting
Yes, very good idea. Can you start a new article? That would give me the chance to test if I can edit an article that I haven't created.
- Sun Mar 10, 2019 9:14 pm
- Forum: User Interface
- Topic: Web interface problems V2.1 mainboard
- Replies: 39
- Views: 13141
Re: Web interface problems V2.1 mainboard
Ok, you need to establish a stable connection to the wifi module. Just observe the green LED on the module. It gives a short pulse when the module restarts (which it might do because it can't talk to the firmware). Do not press any button while waiting. Once the LED stops flashing every 10s or so, t...
- Sun Mar 10, 2019 3:33 pm
- Forum: User Interface
- Topic: Web interface problems V2.1 mainboard
- Replies: 39
- Views: 13141
Re: Web interface problems V2.1 mainboard
Does the green LED flash when the wifi board is not connected?
- Sun Mar 10, 2019 3:26 pm
- Forum: Inverters / Motor Controllers
- Topic: Resolver Excitation with V2 mainboard
- Replies: 52
- Views: 11262
Re: Resolver Excitation with V2 mainboard
Hi Arber, that looks very promising! syncofs can also reverse direction, I think thats what happened.
Are you running coolant in your inverter? Modern car inverters have only very little thermal mass.
Are you running coolant in your inverter? Modern car inverters have only very little thermal mass.
- Sat Mar 09, 2019 7:32 pm
- Forum: Inverters / Motor Controllers
- Topic: Inverter Firmware v4.12.R
- Replies: 27
- Views: 4777
Re: Inverter Firmware v4.12.R
Hi Damian,
thanks for pointing it out, I'll research that.
thanks for pointing it out, I'll research that.
- Thu Mar 07, 2019 9:02 am
- Forum: Inverters / Motor Controllers
- Topic: Over current limiting issues
- Replies: 13
- Views: 3101
Re: Over current limiting issues
Oh, one simplification: you don't need to convert integer constants to fixed point.
FP_MUL(fp, FP_FROMINT(4)) == 4*fp
Likewise for division
FP_MUL(fp, FP_FROMINT(4)) == 4*fp
Likewise for division
- Thu Mar 07, 2019 8:27 am
- Forum: Inverters / Motor Controllers
- Topic: Over current limiting issues
- Replies: 13
- Views: 3101
Re: Over current limiting issues
Hi Nail, so if separate supply of current sensors doesn't help, could it be something else? Do you actually see a small voltage drop on the current sensor output? Maybe you can simulate the gate driver operation by putting a 10Ohm resistor from 5V to GND and see if it causes the same problem. Can yo...
- Thu Mar 07, 2019 6:52 am
- Forum: Battery Managment (BMS)
- Topic: 4-channel BMS with daisychain bus
- Replies: 230
- Views: 66989
Re: 4-channel BMS with daisychain bus
Yes coulomb counting I already do. It would be interesting to calculate the actual state of charge for each cell and how it differs from the coulomb counted SoC. That way you could determine SoH for each cell. Yes top level computer is Linux. Beaglebone or Pi. Took a picture of the setup this mornin...
- Wed Mar 06, 2019 6:19 pm
- Forum: Battery Managment (BMS)
- Topic: 4-channel BMS with daisychain bus
- Replies: 230
- Views: 66989
Re: 4-channel BMS with daisychain bus
More testing today with 25 modules installed on the rear pack. All works nicely when idle. But now with all modules installed even charging disturbs communication, let alone driving. Cables still unshielded though. I will order some shielded cable and will tweak the low passes a bit more. It still l...
- Wed Mar 06, 2019 6:15 pm
- Forum: Toyota/Lexus
- Topic: Prius Gen3 Inverter Hacking
- Replies: 323
- Views: 68259
Re: Prius Gen3 Inverter Hacking
Wow, that looks like a lot of work, great achievement!
- Wed Mar 06, 2019 6:31 am
- Forum: Inverters / Motor Controllers
- Topic: Over current limiting issues
- Replies: 13
- Views: 3101
Re: Unstable rms current reading and a possible fix
Yes you're right, that was a mistake. Now I found something I did years ago but must have forgotten about. Basically I applied the space vector algorithm to the 3 phase currents. sin.png So blue is MAX(ABS(I1), ABS(I2), ABS(I3)) as current implemented Red is ABS((MIN(I1, I2, I3) + MAX(I1, I2, I3)) /...
- Wed Mar 06, 2019 6:08 am
- Forum: Inverters / Motor Controllers
- Topic: Resolver Excitation with V2 mainboard
- Replies: 52
- Views: 11262
Re: Resolver Excitation with V2 mainboard
I can't explain the wobble just yet. But is most certainly has something to do with syncofs. 1. Ok, so EMI does not seem to be the problem here. 2. Iftlrise and fall dampem the response of the over current limiting. The higher the value, the slower the reponse. ifltfall dampens how quickly the ampli...
- Wed Mar 06, 2019 5:59 am
- Forum: Inverters / Motor Controllers
- Topic: Over current limiting issues
- Replies: 13
- Views: 3101
Re: Unstable rms current reading and a possible fix
Hi Nail,
sorry I keep overlooking new posts. We need some "Latest posts" function. So thats an interesting find, I'll look into it.
EDIT: in fact there is a "New posts" function hidden in the burger menu top left.
sorry I keep overlooking new posts. We need some "Latest posts" function. So thats an interesting find, I'll look into it.
EDIT: in fact there is a "New posts" function hidden in the burger menu top left.
- Tue Mar 05, 2019 7:24 pm
- Forum: Battery Managment (BMS)
- Topic: 4-channel BMS with daisychain bus
- Replies: 230
- Views: 66989
Re: 4-channel BMS with daisychain bus
Nice compact unit, have you worked out the rough costs of such a 4 cell monitoring slave? What sort of data rate are you using on the serial bus? What sort of through put time do you see from requesting voltages and getting them back? The BOM cost is like 3€ /w PCB. The manufacturing cost at low vo...
- Tue Mar 05, 2019 7:17 pm
- Forum: Inverters / Motor Controllers
- Topic: Resolver Excitation with V2 mainboard
- Replies: 52
- Views: 11262
Re: Resolver Excitation with V2 mainboard
Yes I think unconnected shield is like no shield at all. 1. 8-pole is 4 pole pairs. So the assumed base speed of 6500rpm would happen at 6500/(60/4) = 433Hz 2. You can use 17.6kHz on Rev2 board. You have to make R1 about half the value (first resistor of 3-pole filter) 3. Could the scary noises be c...
- Mon Mar 04, 2019 8:14 pm
- Forum: Inverters / Motor Controllers
- Topic: Resolver Excitation with V2 mainboard
- Replies: 52
- Views: 11262
Re: Resolver Excitation with V2 mainboard
Hi Arber, thats absolutely remarkable, now you're quite far ahead of me :) I think fweak is too high at 800, I was expecting more like 450. But then, what do I know... At least you should at least reach fweak in terms of rpm. I don't think EMI is the problem, that would show at low rpm. The instabil...