Power in Flux

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Type: Posts; User: CaptainKlapton

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    I've done some somewhat crude but reasonable...

    I've done some somewhat crude but reasonable calculations for both of these cells:

    Volt: @ 100A
    Rectangular_volume = 0.2375 L (single cell, no enclosure)
    Pavg = 342.31 W, Pmax = 383.1 W (at 100A...
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    If you are interested in sizing motors, the peak...

    If you are interested in sizing motors, the peak rating can be somewhat misleading. A lot of the big industrial motors I work with are only rated for ~37kw, but that is a continuous rating, the peak...
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    Just got a new front fork off of a Buell 1125R/CR...

    Just got a new front fork off of a Buell 1125R/CR that was parted out when Harley liquidated their inventory. Stock forks are 38mm O.D. while the new is 54mm. There is a 66mm length difference, but...
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    Right. Heinzmann rates the motor at 2.2-7kw air...

    Right.
    Heinzmann rates the motor at 2.2-7kw air cooled and 2.2-11kw liquid. The voltage and current supplied by the controller will determine how much power the motor can draw from the battery...
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    Brammo Inertia Motor

    I was browsing ebay the other day and came across this. Thought someone might be interested.

    It looks like it is a Heinzmann PMS120 (more info here)
  6. Thread: Hello!

    by CaptainKlapton
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    Welcome to the forum! Others have found these...

    Welcome to the forum!

    Others have found these calculations helpful for getting a general idea of what they need.
    Acceleration will be determined by a large number of variables, but as with every...
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    Slip rings have been used on Induction motors...

    Slip rings have been used on Induction motors practically since its invention. They would connect a variable impedance load to the rotor and that is how they could have a variable speed motor running...
  8. It has definitely been taken apart. This is...

    It has definitely been taken apart.

    This is with the battery terminals at the top of the picture: 6278

    and here are the measurements (x,y ordered pairs in mm as measured by a ruler)
    TOP...
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    It would be possible to do that. But the end...

    It would be possible to do that. But the end bells would probably need to be modified as well to get the full length of the tube in contact with the stator, though I suppose you could use a sharp...
  10. The 1238-7501 I bought from ARC-EV was liquid...

    The 1238-7501 I bought from ARC-EV was liquid cooled. They drilled and tapped 8 holes 1cm deep in the base. I can measure the locations of them if you would like.
    6268
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    Hi Hugues, The part I am thinking of removing is...

    Hi Hugues,
    The part I am thinking of removing is the sheet metal case that is between the two end bells. You can see a weld along the bottom part of the case where the two ends of the sheet are...
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    AC-20 Cooling

    So financial uncertainty is keeping me in the planning stage on my build... So I will continue to obsess over every detail, but bear with me.
    I would like to run a heat sink to make sure it stays...
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    I am planning on using as many of the fairings as...

    I am planning on using as many of the fairings as I can. It has always been one of my favorite bikes in terms of styling. But I don't mind showing a few of the electrics as well :cool:
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    Fork Swap

    After taking the forks apart and seeing what would be involved to make them more modern, I decided to just swap the front end of a more modern bike. That will give me a much wider range of...
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    Simulation

    I have also added a great deal of functionality to my simulation program I wrote in Octave.
    Using it I evaluated six battery configurations and five different gear ratios. The following is what I...
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    Massive Update

    Now that I am finally done with school, graduating tomorrow actually, I can get back to this build.
    I have mostly been doing little things after I get home when I wasn't too tired, but it added up....
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    If you select a frame like a CBR F4 or a ZX-7,9...

    If you select a frame like a CBR F4 or a ZX-7,9 or 11 R, pretty much anything without an engine cradle, you will need to think about a sub-frame like MIT did on their S1000RR. I have an '84 GPz900R,...
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    1. Most of the Japanese bikes still have a...

    1. Most of the Japanese bikes still have a sizable aftermarket support. Early to mid '90's upper displacement GSX-R's are a really good choice (just ask Noah) they have lots of space and are...
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    Personally, I would look into a heatsink. It will...

    Personally, I would look into a heatsink. It will help keep the temperature gradient much smaller across the motor and give you a 200-300% increase in surface area (assuming you have space in your...
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    What type of bike do you want to ride? (Sport,...

    What type of bike do you want to ride? (Sport, Sport Touring, Cruiser, Standard, etc.)

    Here are a few of the main things I would consider for a donor:
    1. Are mechanical parts still available?...
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    Welcome to the Forum! Having access to good...

    Welcome to the Forum!

    Having access to good tools will help you keep costs down, and give you a chance to add the extra custom touch if the mood strikes you.

    Others have found this thread...
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    Welcome to the forum! I calculated those values...

    Welcome to the forum!
    I calculated those values from the information off of the Brammo and Zero websites. All I did was take the pack capacity ( in kwh) and divided it by the claimed mileage at each...
  23. By roundness of the brake rotors do you mean...

    By roundness of the brake rotors do you mean trueness? aka wobble side to side.
    Only other thing I can think of is that something is loose inside the fork and is allowing undamped movement.
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    I was just looking at HPEVS' facebook page...

    I was just looking at HPEVS' facebook page and found some pictures of their dyno setup.
    5952 5953 5954 5955 5956
    Looks to me like a bank of 24 flooded lead acid batteries was used for the tests. I...
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    I am sure it is a kit car, there were only 6...

    I am sure it is a kit car, there were only 6 original Shelby Daytona Coupes made in the '60's. But there are a bunch of kit cars available with that body style.
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