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  1. S

    EU type 2 connector "slow" dc charging

    i dont know . i never seen this implemented on any car yet . i know my car onboard charger is 22kw and can support 3phase 400v ac .standard rapid charging is done via ccs2 connector up to 100kw
  2. S

    EU type 2 connector "slow" dc charging

    it's irrelevant for this topic . check the link i provided in the first post , you can clearly see that "slow dc charging" can be connected to phase 2 and phase 3 inputs on the type 2 connector .
  3. S

    EU type 2 connector "slow" dc charging

    my car can charge at up to 100kw when connected to high power dc (not the connector i intend to use) standard single phase is limited to 70a i think , and 3phase is 63a per phase . my solar array is not large , max 16a , i'm planning to limit the current via the car's evse signalling protocol ...
  4. S

    EU type 2 connector "slow" dc charging

    i'm looking into it just to bypass the inverter for slightly better conversion efficiency , not a big deal . i know the standard ccs2 hand shake protocol is pretty simple with cp , pp pins when charging with AC . i also heard that for high power DC (the lower 2 large pins of the ccs2 connector)...
  5. S

    EU type 2 connector "slow" dc charging

    hello guys . i want to connect my car (not DIY EV) to a small solar array i have . i have custom solar inverter which first boosts the 48v battery voltage to 400V DC and than converts to 220v AC (dual stage inverter DC-DC-AC) i wonder if i can connect the car directly to 400V DC bypassing...
  6. S

    connecting external SSR to BMS output for higher current capability

    contactor is not an option , it will waste lots of power (it should be constantly on until there's an issue) . @fechter external power stage is the best solution , but i'll need to make pcb etc . i think modern dc-dc ssr's are basically a power stage
  7. S

    connecting external SSR to BMS output for higher current capability

    hello guys i use lifepo4 starter battery in my car (normal petrol car) without any balancing or bms for more then 2 years already . recently i had 3 failed cells due to my wife leaving the lights and completely draining the battery overnight. so far i was avoiding using a bms due to the high...
  8. S

    please help me to understand this motor

    so i read about srm yesterday , pretty interesting . srm needs precise positioning feedback , so i guess the smaller coil is really just an encoder .no other encoders were attached to it , except a homing sensor . yes there are no magnets . unlike stepper motor , this one spins freely without...
  9. S

    please help me to understand this motor

    hello guys i'm trying to figure out this motor before applying any voltage . It's an NSK industrial motor , used to drive precision industrial robot . it has 2 windings , one on each side , and a huge bearing in the middle . It seems that the larger windings are the usual 3 phase , all 6 wires...
  10. S

    Building a triple stator axial flux motor

    i'm in a process of building coreless axial flux motor like this one . can anybody tell me what is the rule of thumb for coil vs magnet size ratio ? in this case i see the coil is bigger then the magnet . lets say i'm not limited by number of turns in the coil , using disc magnets with 30mm...
  11. S

    Conclusive proof gearboxes are awesome.

    how is "compensating" lack of torque on EV by using bigger motor any different to using the same method for ICE ? so if i have x car with 1000cc motor , i need more torque , so i put 2000cc motor inside . magical solution isn't it ? whats extra 1000cc to a motor ? its a size increase of approx...
  12. S

    Hybrid Motorcycle - Replace Stator with Brushless?

    stator is in oil bath most of the time , it helps with cooling . no , its not used as starter (i want to try and do so) same as modern cars use moth starter motor and an alternator . KLRbee: you are right that smaller bikes get the timing signal from the stator for the cdi . but on modern...
  13. S

    Hybrid Motorcycle - Replace Stator with Brushless?

    there is a permanent magnet on the rotor , no need to excite any coil . its the usual type magnets , not nd .
  14. S

    Hybrid Motorcycle - Replace Stator with Brushless?

    the stator on the motorcycle is already "brushless" . the only thing you need to do is to rewind the stator , and use better rotor with neodymium magnets . i was planning similar idea , but main thing i wanted is to combine the generator and starter into one single motor that will works as a...
  15. S

    What sort of battery would be in the Koenigsegg Regera?

    there is no point comparing these battery to 18650 cells . i dont know any 18650 cells with very high discharge rate capability . but regular rc lipo can discharge at more than 70c happily with no issues , and they are higher wh/kg . newer graphene lipo can discharge at 115c for short bursts...
  16. S

    What sort of battery would be in the Koenigsegg Regera?

    i dont get it , what is so special here? 9.27kWh weights 115kg = 80Wh/kg battery , am i wrong ?
  17. S

    wye to delta on the go m-controller ?

    so no solid state electronics that can do that inside the controller , without relays and such ?
  18. S

    wye to delta on the go m-controller ?

    hello guys sorry if my questions are stupid . i wonder if today there are m-controllers available that can change the motor configuration from delta to wye and vice versa on the go , in order to get max efficiency for torque and rpm . what i mean is the motor has 6 wires , and controller can...
  19. S

    Project: Home made velomobile design with crank or mid motor

    every time i see those aerodynamic sketches , i wonder why bullets dont follow those rules ? also artillery shells , space rockets ,bullet trains , fighter jets - all have conical nose .
  20. S

    Copper strips instead of nickel?

    spot welding copper can be a problem , the strip should have higher resistance then your electrodes and wires , thats the only way its going to heat up and weld .
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