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  1. 7circle

    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...
  2. 7circle

    The big Lebowski controller

    Any updates or progress? Would like to jump on board too..
  3. 7circle

    Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

    the other type to consider 2-1761713-3-ND or similar with no side wastage
  4. 7circle

    Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

    That part looks like a special ribbon to panel mount with retaining clip/ears. "Rectangular Connectors - Free Hanging, Panel Mount" For pcb male header with ears wouldn't "OR880-ND XG4A-1031" Or any of these be what you need. digikey 10pin male pcb header with retainers clips This one...
  5. 7circle

    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...
  6. 7circle

    Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

    The Digikey search on OR1129-ND came up with a 10=5x2 cable side free lead header to hold female crimps. Will you try flat ribbons or go direct to making twisted pair cables? What part number will you fit to the PCB for 5x2 male pin header block with locking ears??
  7. 7circle

    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//////
  8. 7circle

    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 ... there's a hole in the bucket dear...
  9. 7circle

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

    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...
  10. 7circle

    Tesla model D?

    Can you explain how the photons manifest the stator and the rotor?
  11. 7circle

    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 ..) Which is derived from the Air Gap to Rotor transformer model. This...
  12. 7circle

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

    "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
  13. 7circle

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

    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.
  14. 7circle

    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...
  15. 7circle

    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...
  16. 7circle

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

    I'm may have confused things as I usually call DC Current sensors "Hall Sensors" as they use hall effect to measure the current. The Rotation sensors being Hall pickups in the motor stator field pickuping of the rotor Magnets. "I noticed the manual V2.30 still discusses the older 2k2 divider...
  17. 7circle

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

    I think you want Energy capacity in Watt.hours (Wh) that's power for duration... each cell is supplying 3.5V x 20A = 70W But LiFePO4 ramp down there volts after first 5% to a very stable nominal of 3.2V And temp and load effect this voltage before reaching 90% Depth of dicharge. If you know...
  18. 7circle

    My new 18 FET TO-247 layout riding video page 10

    I had a look over the circuits and have some questions / thoughts. Why did you put the DC/DC on a seperate sheet? Where you thinking of making a DC/DC? Why have the Gplane connector? If its for support .. just leave it nc. REduce chance off current loops. No cap on Vref pin? Digital On...
  19. 7circle

    Arlo's power stage Leaf controller runs and drives page 103

    I did a digikey search for 150mW or less and Zener Volts over range 2.4V to 3.4V and "cut tape" for MOQ of 1...
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    Arlo's power stage Leaf controller runs and drives page 103

    Wouldn't say "just the ACPL-333J" with 2A be consider a power stage, then the booster with 8A .... so you could say MKP would be better suited for this rail support role. But for less than 25V rating they aren't stabilizing much power. Just to highlight HighHopes comments.. Digital and...
  21. 7circle

    ZombieSS's power stage for Lebowski's controller video pg17

    From Arlo1 Power Stage ... http://endless-sphere.com/forums/viewtopic.php?f=30&t=35387&p=960753#p960753 Further on the Current Charge Pulse... my comments From Arlo1 power stage thread.. Do you have a creation date on those SCOPE pics to find in your thread what discussion was about and...
  22. 7circle

    Arlo's power stage Leaf controller runs and drives page 103

    Here's Figure 50-10 _ Dead-Time Insertion in Center-Aligned Mode 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
  23. 7circle

    Arlo's power stage Leaf controller runs and drives page 103

    Ahh So 20kHz for center aligned setting in lebowski controller acts like 10kHz normal blocked pwm. |-------------| |----------| ------| |--------------| |-------- ^ ^ ^ ^ <---- n...
  24. 7circle

    Arlo's power stage Leaf controller runs and drives page 103

    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...
  25. 7circle

    Arlo's power stage Leaf controller runs and drives page 103

    Are you refering to ... The 333J is not compatible to drive a Mosfet booster power power stage (P-FET HI / N-FET LO). - you would need to invert the Vout before the booster, and all this will add more parts with rise/fall time delays and cost. - And 24V on the gate of a N-FET is not good. To...
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