Power in Flux

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Type: Posts; User: frodus

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    One thing to realize, is that the controller max...

    One thing to realize, is that the controller max stator amps is 660A. And the 475A is likely battery side. They won't ever be the same. The controller is a bit like a gear converting one RPM/Torque...
  2. I say Sure. Brammo had a battery plug that could...

    I say Sure. Brammo had a battery plug that could be disconnected while working on the bike.

    For my Kart, I'm using SB350's for the disconnect between pack and the contactor. PLEASE, PLEASE fuse...
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    Most of the mainstream EV's only use a Contactor...

    Most of the mainstream EV's only use a Contactor (or two). They're spring loaded and usually have a magnet that helps quench the DC arcing. The EV200 and LEV200 I use in my systems can break 2000A at...
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    Mandres, I rent the programmer, and also have...

    Mandres,
    I rent the programmer, and also have been making some nice tweaks to the motor files over the last few months. It's pretty close to where I want it. I would say this combo right now is...
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    The Sevcon DC-DC I sell is an isolated DC-DC...

    The Sevcon DC-DC I sell is an isolated DC-DC converter, meaning the 12V output is completely isolated from the battery pack High Voltage input.
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    Clearview is for the Sevcon Gen4 only, it's not...

    Clearview is for the Sevcon Gen4 only, it's not designed to work with other devices and uses CANopen for the protocol.

    I agree, keep Sevcon stuff on one CAN connection. Then the BMS, EVCC, Charger...
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    I don't know much about their BMS or if it's...

    I don't know much about their BMS or if it's isolated. Essentially, it needs to be isolated at the cell level, so current cannot flow from B+ through the BMS to that cell.

    I don't know that I'd...
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    Another thing to mention, is that the CANbus on...

    Another thing to mention, is that the CANbus on the Sevcon Gen4 are not isolated with respect to the pack. I don't know what BMS you're using, but just be sure that you're aware of isolation issues...
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    Really nice work!

    Really nice work!
  10. Can you machine down a #50 sprocket (530 chain...

    Can you machine down a #50 sprocket (530 chain size) to what you need?

    www.surpluscenter.com has some under "Power Transmission"and "finished bore sprockets"
  11. I have 10t 7/8" for 520 in stock:...

    I have 10t 7/8" for 520 in stock:
    https://www.emf-power.com/product/10t-520-sprocket-for-7-8-shaft/
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    What makes you think I ain't?

    What makes you think I ain't?
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    Ha! My Elmoto was pre-wife, so she didn't get to...

    Ha! My Elmoto was pre-wife, so she didn't get to see it, but she did see the Brammo when i owned it.

    But more recently, I've got the Kart project and she had no illusions of what it was going to...
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    Maybe take the cover off and make sure everything...

    Maybe take the cover off and make sure everything inside is seated correctly, especially the voltage leads.
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    I think he should be allowed back if he follows...

    I think he should be allowed back if he follows the rules and stays positive in his posts. His apology seems to show he understands.
  16. FA, That is the single best written post by...

    FA,

    That is the single best written post by you since you got here (and even of all the ones on DIY Electric Car). Thanks for taking a few minutes to write it. It was clear and concise and not as...
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    There can be a little difference between 89.1V...

    There can be a little difference between 89.1V when measured by the DeltaQ itself. It might be slightly higher at the battery if your multimeter is not calibrated.

    The lithium profile, when you...
  18. What is the part? I ship all over the world and...

    What is the part? I ship all over the world and custom order parts all the time, and use USPS and have legit customs forms.
  19. Can I work remotely? haha

    Can I work remotely? haha
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    RE: Display Myself and another company are...

    RE: Display
    Myself and another company are working on a device that can be connected to the Zeva BMS via CAN, as well as the Sevcon Gen4 controllers to read various parameters via Torque for...
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    I just mean that something, like charger or DC-DC...

    I just mean that something, like charger or DC-DC is injecting noise back into the system. When removed, things work. When put back, things stop. There's likely some sort of either EMI, or a ground...
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    Can you post the wiring diagram or sketch?

    Can you post the wiring diagram or sketch?
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    OK, gotcha. That way it wouldn't power on. ...

    OK, gotcha. That way it wouldn't power on.

    Sounds like there's a noise coupling somewhere. Maybe one of the chassis's of the devices is grounding to the chassis of the vehicle.
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    Do you have a schematic? I can't find in this...

    Do you have a schematic? I can't find in this thread. Sketch your system if possible. Probably going to work at 12V.
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    Sounds good! What is the output of the kelly...

    Sounds good!

    What is the output of the kelly for the contactor drive? These are 12V coils (no economizer, so compatible with Sevcon/Curtis and others).
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