Search found 444 matches

by Futterama
Oct 18 2017 1:44am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

Arlo1 wrote:I have some bad ass IXYS parts that do better as well some IR igbts in a 247 package that will do leg limts cold and ~100-110 rms when warm. ;)
Please give IXYS part numbers on those badasses :mrgreen:
by Futterama
Dec 01 2016 3:48pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic & setup, new v

Arlo1 wrote:$7 for optic isolation is pretty cheap. How much do yoy think a small pic would be to do the same thing?
$0 as I have hundreds laying around from other projects :wink:
by Futterama
Dec 01 2016 2:18pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic & setup, new v

Arlo1 wrote:
Lebowski wrote:Which is Using a Acpl-C87 and a op amp 4.7v = 470 volt at the battery.
The ACPL-C87 is kinda expensive.

Lebowski, would it be possible for the controller IC to accept a digital reading from a small PIC on the HV side through a digital isolation barrier to the controller IC?
by Futterama
Nov 30 2016 4:22am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic & setup, new v

You could also try using two separate LiPo batteries as low voltage supplies, like a 4S with a linear regulator for 15V and 2S with a linear regulator for 5V. This way you can determine if the noise/voltage drop is actually from the main supply or some inductive noise. When I did my initial tests a ...
by Futterama
Nov 29 2016 3:01am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic & setup, new v

Tomdb, do you have any long wires that could pick up noise from the motor and cause the reset? Maybe a bad connection somewhere? Also try using SMD MLCC capacitors instead of those electrolytic ones. You can get 22µF 10V X7R in 1206 package which would fit the DIP pins of the controller IC. A small ...
by Futterama
Apr 21 2016 5:31am
Forum: Motor Technology
Topic: low inductance output stage contruction
Replies: 157
Views: 23078

Re: low inductance output stage contruction

Hi whereswally606, it looks awesome 8) As far as I understand from Lebowskis priciple, the inductance between the MOSFETs in one 6-FET config should be as low as possible, but when connecting several "modules" of 6-FETs together, the inductance between those modules, is less important than the induc...
by Futterama
Dec 30 2015 1:18pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic and setup manu

Tomdb wrote:Or does it require the rs232 conversion?
The output from the chip is only serial data, not RS232 voltage levels, so no, you don't need RS232 as such, you can hook up the serial output to any 5V system.
by Futterama
Dec 22 2015 9:21am
Forum: Motor Technology
Topic: DIY 6FET Controller help
Replies: 299
Views: 35270

Re: DIY 6FET Controller help

zombiess wrote:
Futterama wrote:Still 6FET with 190/200A phase?
I can build a 6 FET 1000A controller, it just uses larger FETs.
Corrected: Still 6FET with 190/200A phase and TO-247AC MOSFETs?
by Futterama
Dec 21 2015 6:52am
Forum: Motor Technology
Topic: DIY 6FET Controller help
Replies: 299
Views: 35270

Re: DIY 6FET Controller help

Still 6FET with 190/200A phase?
by Futterama
Dec 06 2015 8:09am
Forum: Motor Technology
Topic: A Lebowski controller in a 9 FET 'Infineon' case
Replies: 3
Views: 1488

Re: A Lebowski controller in a 9 FET 'Infineon' case

As I read your post here, I wonder why you chose the Lebowski chip in DIP package and not the smaller SMD package that he also offers. If you at some point need more room, you could switch the big DIP chip to the smaller TQFP chip. It's doesn't sound like you would have any problems soldering the SM...
by Futterama
Dec 01 2015 10:05am
Forum: Motor Technology
Topic: DIY 6FET Controller help
Replies: 299
Views: 35270

Re: DIY 6FET Controller help

nieles wrote:did you rule out the ringing being the cause of a big loop in your probe connection?

if not, you could try one of these spring things as a gnd point to make a very small loop
Image
What are those called in real life? Can't find them on ebay...
by Futterama
Nov 20 2015 2:36am
Forum: Motor Technology
Topic: DIY 6FET Controller help
Replies: 299
Views: 35270

Re: DIY 6FET Controller help

HighHopes wrote:but the chip is only rated for so much current so that you must be careful for.
The ACPL-333J is rated for "2.0 A minimum peak output current" so he should be safe with an even lower value turn-on resistor than the 15Ω he has now.
by Futterama
Nov 13 2015 3:29am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic and setup manu

V2.50! I'm still tinkering around with 2.21 :lol: Feature request: Output stage test. Test of individual FET/gate drive from menu option. I know you have the motor standstill thing, but I'm not keen on connecting anything directly from output stage to controller IC when using isolated supplies. And ...
by Futterama
Jun 04 2015 10:45am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 224826

Re: Lebowski's motor controller IC, schematic and setup manu

Hi Lebowski,

I'm not sure this has been asked before, but can the controller chip be configured for regen when going from high throttle to lower throttle? I mean, like engine braking in a gasoline car. I guess you could call it regen while coasting.
by Futterama
May 30 2015 2:45pm
Forum: Motor Technology
Topic: Futterama's power stage for Lebowski's controller IC
Replies: 188
Views: 22698

Re: Futterama's power stage for Lebowski's controller IC

Project has been on standby for some time now. An exiting new job at Siemens Wind Power has been taking all my intellectual strength, and the season for RC model airplanes has begun so I have spent my time on work and my RC hobby. One of my new colleagues are driving around in a Mini-El and we start...
by Futterama
May 15 2015 9:09am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

Maybe also check the gate driver supply voltage at the high PWM rate since they can draw a good amount of current at high PWM.
by Futterama
May 14 2015 7:36am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

With the Lebowski chip, always do a complete setup from scratch when changing the motor. The chip needs to know a lot about the motor to make it run, so do the setup all over on the MAC, export the old setup beforehand, so you can easily switch back to the other motor.
by Futterama
Apr 26 2015 1:15pm
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

Could you post a clearer image of the marked area? It doesn't look right to me, it doesn't look right at all...
by Futterama
Mar 30 2015 11:37am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

Really nice work! One thing I noticed about the last picture, you have the end lid covering the cooling fins, I suppose this would obstruct the airflow through the cooling fins and give less cooling performance. Your lid should probably not be larger than to the red line I marked on your picture bel...
by Futterama
Mar 30 2015 2:28am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

Haha, yes, it was Andy's work on the SMD components I was talking about, I didn't even notice your work, probably because it looked so familiar and normal to me :D
by Futterama
Mar 29 2015 12:32pm
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 52835

Re: Micro Lebowski Controller - DIY 3kw

That is truly a good soldering job, looks like it is reflowed, I tend to use too much solder myself :roll:
by Futterama
Mar 16 2015 2:01am
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 245874

Re: Arlo's power stage.... New pics on page 34

I just checked the block diagrams, I'm using port B to read faults and everything is TTL. There are Schmitt Trigger inputs, but they are for alternate pin features. I'll have to dig through the datasheet some more to find info on logic trigger levels as I don't remember it. All of PORTA uses ST inp...
by Futterama
Mar 13 2015 11:18am
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 245874

Re: Arlo's power stage.... New pics on page 34

Njay wrote:Concerning a STrigger input, you can do that with the microcontroller's voltage comparator.
I don't know about the Arduino, but as an example, the PIC18F1320 zombiess uses, has several inputs that are ST (ST = Schmitt Trigger input with CMOS levels).
by Futterama
Mar 13 2015 5:00am
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 245874

Re: Arlo's power stage.... New pics on page 34

For slow analog signals to a digital reading input pin, look for a "Schmitt Trigger" input on the microcontroller, it will work real fine with slow moving signals.