Search found 137 matches

by 7circle
Sep 09 2016 2:44am
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1259
Views: 194493

Re: jonescg's NEW electric racebike BUILD thread!

OMFG - YOU HAVE REACHED THE POIT OF MULTI BUILDS YOUR THIRD BIKE DESIGN I am with gritted teath .. and need to find a way to get some power bike riding experience and a heap of cash. can dream but Chris is in it... CHEERS .. Now on to matters of tire to track forces. I thought you where still able ...
by 7circle
Jul 17 2015 4:51am
Forum: Motor Technology
Topic: The big Lebowski controller
Replies: 39
Views: 9906

Re: The big Lebowski controller

Any updates or progress?

Would like to jump on board too..
by 7circle
Oct 31 2014 10:56am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 575
Views: 88118

Re: Hi power high voltage inverter build for nissan leaf mot

the other type to consider

Image
2-1761713-3-ND

or similar with no side wastage
by 7circle
Oct 31 2014 8:07am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 575
Views: 88118

Re: Hi power high voltage inverter build for nissan leaf mot

Ok I found XG4M-1030-U which should work. It has the locks come from the top and saves board space. Digikey # OR910-ND http://www.digikey.ca/scripts/DkSearch/dksus.dll?Detail&itemSeq=160177440&uq=635502585651900074&CSRT=13775704242911192064 http://media.digikey.com/photos/Omron%20Elect%20Photos/XG4...
by 7circle
Oct 30 2014 7:04am
Forum: Motor Technology
Topic: Kicad Workshop
Replies: 20
Views: 2355

Re: Kicad Workshop

I just opened up Alro1's last Brain.Zip http://endless-sphere.com/forums/download/file.php?id=150612 and found the dsPIC 40pin with 20x2 style pin numbering. That's when the opposite pin to PIN1 is PIN2 not PIN40. The previous version pdf has DIL40 style numbering... so looks like your computer has ...
by 7circle
Oct 30 2014 12:57am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 575
Views: 88118

Re: Hi power high voltage inverter build for nissan leaf mot

Ok so I originally planned to use locking 10 pin connectors. Then I got some coming but they are big they will work on the driver stage boards. But the brain needs something smaller. What do you guys think about the XG4C header with this for a locking connector? http://www.digikey.ca/scripts/DkSear...
by 7circle
Oct 29 2014 9:07am
Forum: Stand-up E-scooters and E-skateboards
Topic: Honda Uni-Cub and U3-X
Replies: 4
Views: 859

Re: Honda Uni-Cub and U3-X

OK Go .. on tell me did some one just put some acid in the cool aid.

THat video clip was bazaar//////
by 7circle
Oct 25 2014 11:59am
Forum: EV Business World
Topic: Tesla model D?
Replies: 68
Views: 10559

Re: Tesla model D?

The Force is strong with you Luke... :mrgreen: So will a Zero benefit fit from a small/light (perhaps ironless) front hub motor? Or the dp3 ... how does one choose a path when there is little ... to learn from each path. Follow the Poynton Vector http://upload.wikimedia.org/wikipedia/commons/thumb/2...
by 7circle
Oct 24 2014 10:53am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1794
Views: 202717

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

Did you know you can import schematics into your schematic sheet like Copy and Paste. - Lebowski has his KiCAD file for V2p30 here : 30F_pcb_v2p30.zip http://www.endless-sphere.com/forums/download/file.php?id=142967 You could then modify it to suit your design like delete off stuff you don't want. T...
by 7circle
Oct 24 2014 9:07am
Forum: EV Business World
Topic: Tesla model D?
Replies: 68
Views: 10559

Re: Tesla model D?

Can you explain how the photons manifest the stator and the rotor?
by 7circle
Oct 24 2014 8:59am
Forum: EV Business World
Topic: Tesla model D?
Replies: 68
Views: 10559

Re: Tesla model D?

So Steinmetz Equivalent circuit could be replaced with a better _delusion_ >> Interesting character Steinmetz. Here's his Induction motor per phase equivalent circuit. (Where X is the 2.pi.f.L and s is the slip ... etc ..) http://upload.wikimedia.org/wikipedia/commons/thumb/9/93/IMEQCCT.jpg/825px-IM...
by 7circle
Oct 23 2014 9:34pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1794
Views: 202717

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

"static" as why parts come.in anti-static bags.

The Hall 5pin wiring goes out of the enxlosure. It can get static charge. This can damage CMOS ic pins.
often these pins are protrcted with tvs diodes to the vcc and gnd rails.

It could be over kill. Just a warning
by 7circle
Oct 23 2014 5:47pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1794
Views: 202717

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

your building an ev .. not delicate lab experiment.

Static discharge from external connections can do nasty things to microcontrollers.

Just thinking of practical issue of protections from nuisance failures.

Or be vigilant in grounding procedures.
by 7circle
Oct 23 2014 5:24pm
Forum: EV Business World
Topic: Tesla model D?
Replies: 68
Views: 10559

Re: Tesla model D?

oh oo :pancake: ... Phase inductance ... will see less phase current.. I should have written Impedance not resistance. This voltage vector is much larger than copper loss resistance. 2.pi.f.L x I(f) and your "illuding" to the imaginary was contorting. The imaginary can have a larger influence than t...
by 7circle
Oct 23 2014 6:39am
Forum: EV Business World
Topic: Tesla model D?
Replies: 68
Views: 10559

Re: Tesla model D?

Going AWD effects lots of things.. Just considering the RWD.. If they have proven the trio of bat / drive / motor and can push more current and volts from the bat due to lower resistance, that can push the motor further into field weakening to get more RPMs with more power. So many factors effecting...
by 7circle
Oct 23 2014 4:38am
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1794
Views: 202717

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

Lebowski - nice work on the adabtable hall analyzer. I noticed the manual V2.30 still discusses the older 2k2 divider style. oops, my bad Sweet so I can get ride of these 2.2k dividers? I notice the hall circuit is empty just 5v and gnd and halls to the plug. Im adding the hall support to my board ...
by 7circle
Oct 21 2014 11:05am
Forum: Battery Technology
Topic: How can I tell how much power is in my life cells?
Replies: 24
Views: 2262

Re: How can I tell how much power is in my life cells?

...Is there a formula using amps, voltage and milage to determine ah? say if I start out at 3.5v using 20amps for 18 miles and end up with 3.3v? (and using a 30ah cell) Any info is helpful and appreciated. I think you want Energy capacity in Watt.hours (Wh) that's power for duration... each cell is...
by 7circle
Oct 21 2014 10:10am
Forum: Motor Technology
Topic: My new 18 FET TO-247 layout riding video page 10
Replies: 308
Views: 41227

Re: My new 18 FET TO-247 layout for Lebowski Controller

I did some testing of the current my gate driver can deliver. Setup is as follows. I setup a 104mOhm shunt (10x 1.0 ohm resistors) in parallel with the gate drive output hooked up to a 1.0uF snubber cap. The boost stage has 2 10uF caps in parallel feeding it. The 1.0uF cap was used because it was h...
by 7circle
Oct 19 2014 12:07pm
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 228403

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

i do not think your zener is a good choice, but figure 9 of the datasheet seems to imply it will work just fine. for the record, this is the part i am using in my EV high performance motor drive DDZ9692 So I searched Everything from Diodes inc. Like yours and 2 come up in the 2.5v search! One is a ...
by 7circle
Oct 19 2014 11:37am
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 228403

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

most caps for digital or analog application, including low voltage bulk storage = X7R timing circuits = C0G Power = MKP, metalized film, poly etc. Thank you. It was my misunderstanding. I read what you said as not to use the X7R Caps. But you were pointing out for the High voltage rails which I hav...
by 7circle
Oct 19 2014 10:32am
Forum: Motor Technology
Topic: ZombieSS's power stage for Lebowski's controller video pg17
Replies: 455
Views: 40120

Re: ZombieSS's power stage for Lebowski's controller video p

From Arlo1 Power Stage ... http://endless-sphere.com/forums/viewtopic.php?f=30&t=35387&p=960753#p960753 Arlo1, I missed it somewhere in the conversation, but why don't you want to use the TO-220 based D44VH10/ D45VH10 transistors? Below are two scope shots I took verifying my boost stage on my TD350...
by 7circle
Oct 17 2014 12:34pm
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 228403

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

Here's Figure 50-10 _ Dead-Time Insertion in Center-Aligned Mode http://endless-sphere.com/forums/download/file.php?id=149710 The period is doubled. Causing the freq to be halved. When you look at the phase current ripple on a scope all will be clear. That's what makes the high pitch whine. .. mainly
by 7circle
Oct 17 2014 11:50am
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 228403

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

Oh and Lebowski uses Center aligned PWM which feeds the power in on each end of the switching event so its kind like having 2x the PWM frequency. Ahh So 20kHz for center aligned setting in lebowski controller acts like 10kHz normal blocked pwm. |-------------| |----------| ------| |--------------| ...
by 7circle
Oct 16 2014 11:53pm
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 228403

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

For 20kHz PWM and acceptable fast IGBT switching to minimize losses. What if you want 30kHz or Higher. How do you decide if the transistors are slowing the driver stage from pushing the gate as fast as needed. 20kHz is Arlin's target so best to stay focused on this. The 2955/3055 look like there jus...
by 7circle
Oct 16 2014 3:04am
Forum: Motor Technology
Topic: Arlo's power stage Leaf controller runs and drives page 103
Replies: 2595
Views: 228403

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

Are you refering to ... so long as you use transistors (not mosfet), have sufficient current/voltage rating and the pair are complementary type, then you're good. actual part number of other reference designs no too important, so feel free to shop around. just meet the above requirements. The 333J i...