Search found 3147 matches

by Lebowski
May 15 2018 11:14am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

My goal is to have something which can sense the correct phase even when the motor is (mechanically) locked, so that the motor can provide torque in the correct direction against the mechanical lock. So no cheating by having a necessary small bit of movement to try and figure out which way we're goi...
by Lebowski
May 15 2018 2:30am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

lizardmech wrote:
May 14 2018 5:11am
are you keep it secret in the hope of commercializing it or something?
yes :D
by Lebowski
May 14 2018 2:55am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

basically the circuit is a lowpass filter. With the VESC it allows you to filter out the PWM and see the sinusoidal content of the output.... though it should look more trapezoidal than sinusoidal. You need the motor parameters to calculate the correct timing advance for FOC. But mine does not need ...
by Lebowski
May 14 2018 2:52am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

Filtering and amplification... basically compensating for the ADC being only 10 bits
by Lebowski
May 13 2018 3:34am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Tja, I don't really know what TI does with Instaspin. If you have a schematic somewhere I'd be interested to have a look... What I have seen somewhere (but this is not FOC or rotor position detection at standstill) is that they integrate the phase voltages to get motor flux (as voltage is the deriva...
by Lebowski
May 08 2018 12:03pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

would your sensorless start improvments help with "regular" sensored start in some way as well? even though the controller/software now (since last autumn's update with hall data integration in sensorless mode) works better than ever, there is still some improvment possible in the (sensored) start ...
by Lebowski
May 08 2018 2:03am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

Sensorless torque at standstill, unfortunately direction is still random and can change when switching on/off, so that will be the next thing to work on :D

by Lebowski
Apr 30 2018 2:45am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

nice thing of a bigger chip is larger RAM (8kB, wow :shock: ) so I can sample real-time data and have a look at signal spectra: (this is a complex spectrum with two notch filters implemented, one at DC and one at a negative frequency) real time datalogging-800x800.jpg It was a real #$%@ though to ge...
by Lebowski
Apr 26 2018 10:32am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1185
Views: 189676

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

Making the controller parameters motor independent is no big deal, and it (well, mine) doesnt need to know motor inertia.... Ah sorry I should have clarified, not motor inertia but the overall total vehicle inertia. At least the way that ASI has written their sensorless self start firmware it runs ...
by Lebowski
Apr 26 2018 7:22am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

It is actually possible to get absolute phase information (so including north/south) and without pulsing etc... but this signal almost disappears the moment you apply phase current so cannot be counted on as a reliable and ever present source of info... Still trying to find a workaround, will just t...
by Lebowski
Apr 26 2018 4:39am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

Since whereswally606 asked in a PM about the sensorless start with full torque Iam working on, might as well post the status here: I am at a point where I have a one-shot algoritm to get the double phase out. So the controller IC takes just one look (it does not need multiple, but filtering multiple...
by Lebowski
Apr 21 2018 1:20am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1185
Views: 189676

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

Making the controller parameters motor independent is no big deal, and it (well, mine) doesnt need to know motor inertia....
by Lebowski
Apr 17 2018 1:04am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Yep, R18-23 for 4468's should be 4.7 Ohm, R12-17 should be 15 Ohm. R1, I dont know the value of this one yet, it is a filter resistor for the processor board supply. Ive been using 100 Ohm so far, but shorting it out should be ok too. Plan is to drop around 5V across this resistor, assuming the powe...
by Lebowski
Apr 14 2018 12:32pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 180740

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

Busy with some extremely interesting stuff. DSC02111-800x800.jpg I've started programming on a different chip, one of the 33EV types. Goal is to have sensorless start with full torque at standstill. Relative (sensorless) position at standstill is quite easy, but to get absolute phase information req...
by Lebowski
Apr 14 2018 11:54am
Forum: Motor Technology
Topic: build your very own Lebowski controller !
Replies: 376
Views: 52889

Re: build your very own Lebowski controller !

Did you just solder them ? You should be getting the correct values... did you add the pull up resistor ?
by Lebowski
Apr 14 2018 5:55am
Forum: Motor Technology
Topic: build your very own Lebowski controller !
Replies: 376
Views: 52889

Re: build your very own Lebowski controller !

Did the chip correctly find two temp sensors ? Does it display the two identification codes ?

P.s. and its recommended to update the firmware to 2.A1
by Lebowski
Apr 13 2018 4:04pm
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Just be meticulous and building the board should pose no problems. I would however add copper wire to the high current traces. Solder basically has about 10 times the resistance of the equivalent area of copper. So you need 10mm^2 of solder (a 2 mm thick layer on 5 mm wide traces) to get the equival...
by Lebowski
Apr 13 2018 9:52am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

Make sure you get the correct gate resistors for the Fet you are using.

Also, leave some room between Fets and PCB, this make it easier to replace a broken FET and for fattening uo the traces.
by Lebowski
Apr 10 2018 9:50am
Forum: Motor Technology
Topic: Arlo1 Inverter build for Emrax 268
Replies: 20
Views: 2508

Re: Arlo1 Inverter build for Emrax 268

Something that will help reduce the noise in drive_3 is to reduce this coefficient: n) immediate motor phase step: 48 in the control loop coefficients menu. You can set this coefficient all the way down to 0, but it may (or not) cause instability. I am not 100% sure this coefficient is absolutely ne...
by Lebowski
Apr 08 2018 8:14am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki RF400E, now with Enertrac MHM602
Replies: 118
Views: 48971

Re: Suzuki RF400E, now with Enertrac MHM602

Looking at the slides your speed is voltage limited to 100kmh. I assume the Kelly controller does not have field weakening ?
by Lebowski
Apr 07 2018 8:14am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

TI has it (and is the only one I think) but as far as I know has not published how it works... plus figuring out for myself is more fun :D
by Lebowski
Apr 07 2018 5:05am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

This might become the next generation... depends on whether I get sensorless full torque at standstill working...

The power pcb makes for a nice development platform, only need to build a new processor board and can use the power pcbs output stage and current sensors.
by Lebowski
Apr 02 2018 2:31am
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

and this is where I keep assorted lengths of wire...
DSC02110-800x800.jpg
DSC02110-800x800.jpg (128.37 KiB) Viewed 1629 times
by Lebowski
Mar 28 2018 3:35pm
Forum: Motor Technology
Topic: Power PCB for Lebowski Controller to be combined with Bobc's processor board
Replies: 167
Views: 12399

Re: Power PCB for Lebowski Controller to be combined with Bobc's processor board

LLC ACS770ECB-200B-PFF-T (620-1538-5-ND) instead of LLC ACS770KCB-150B-PFF-T (620-1540-5-ND) Bas should we upgrade to this sensor since we look to all be opting for the 4468 fets and this gives us a bit of head room. Please check my comparison i think this is the direct equivalent upgrade, i dont w...