Electic Aeromotion

Discussion in 'Electric Propulsion' started by Area 29, Apr 10, 2019.

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  1. Apr 10, 2019 #1

    Area 29

    Area 29

    Area 29

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    I started thinking about this in 2011, began the engineering in '16, dwgs and purchases in the summer of '17 and found a machinist in April of '18.So when he called last week to say "pick up your parts" I was more than pleased.
    I checked with receiving at Area 29. All the parts were in, I was euphoric.
    Final fitting and initial assembly completed, initial electrical testing underway.
    The motor mfg. claims 45kw max power, and a continuous current of 300A at 120V. Hmmmm, 36kw (48.2) horsepower. I am hopefull it will /can sustain 25kw.
    The motor has been physically modifed and reconfigured for use in this configuration.

    Regards from

    David
    Area 29
    aeromotive div. IMG_20190409_133051666r.jpg
     
    Last edited: Apr 10, 2019
    bmcj and Victor Bravo like this.
  2. Apr 10, 2019 #2

    Area 29

    Area 29

    Area 29

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    This is a photo of the motor as received from the manufacturer.

    Regards from

    David
    grounds keeper
    Area 29 IMG_20170802_202016554.jpg
     
    Last edited: Apr 10, 2019
  3. Apr 10, 2019 #3

    henryk

    henryk

    henryk

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    -we was working with this motor (154120 ?)...

    =at 100 A/100 V four coils are burned !

    (see widing qality...)
     
  4. Apr 10, 2019 #4

    Area 29

    Area 29

    Area 29

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    Yes indeed, a 154120 wound 55kv.
    henryk, thank you for the input, have you considered rewinding?

    Regards

    David
    Q.C. dept.
    Area 29
     
    Last edited: Apr 10, 2019
  5. Apr 10, 2019 #5

    henryk

    henryk

    henryk

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    -auer is KV25...(for heli drive).

    -yes,we will revinde them.

    now we have doubled 20280 ?
     
  6. Apr 12, 2019 #6

    Foundationer

    Foundationer

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    Very interested to know the actual numbers on this motor. Given the number of these and the 120100 and 12090 and whatever else seem to get sold finding numbers for them is strangely hard.
     
  7. Apr 12, 2019 #7

    henryk

    henryk

    henryk

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  8. Apr 25, 2019 #8

    emir_82

    emir_82

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    We pushed the 154120 a little further than 10kW and is still running.
    The good thing is that you can find someone who can rewind it with more and better copper.
    But by the geometry, i dont think it will hold up 25kW continuous. It is plausible 20kW if you rewind it.
    The good part is that you have a reduction belt. It is easier to draw power at higher rpm.
    Try to pair the propeller RPM with 75% of the motor max RPM, generally there is the most efficient point.
     
  9. Apr 25, 2019 #9

    henryk

    henryk

    henryk

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  10. Apr 26, 2019 #10

    Area 29

    Area 29

    Area 29

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    Hello emir_82 and thanks for that.

    Yes I agree it is important to match prop speed to max motor RPM.

    One of the first objectives in the development of the e-aeromotion assembly was to utilize a standard Rotax 75mm bolt pattern prop hub and get the prop off of the 15 mm motor shaft.

    The 25 mm belt turns the hub at 1/2 motor RPM. So.... 55 Kv at 28s Lion..... 3.65*28*55/2.... aprox 2800 RPM designed prop speed. (Max V 120 @55Kv = 6600 so @ 83% max motor rpm avail.)

    I am utilizing a Powerfin 60" 3 blade prop, "B" blades. I will of course be able to set the pitch for best performance.

    I am currently constructing a test stand, more to follow.

    Regards,

    David
    Transportation tech
    Area 29
     
    Last edited: Apr 26, 2019
  11. Apr 27, 2019 #11

    emir_82

    emir_82

    emir_82

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    David:
    The kV is lower when loaded. You may need to recalculate to a kV=50.
    28s is near 120v. But the cells will have 4,2v only for a short period of time.
    Its better to calculate to the nominal voltage of the cells, like 105V in total. And of course if you have this thing flying the propeller must turn at the same speed even with low battery (80-85v)

    How do you will measure the power output?
     

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