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← Revision 20 vom 06.03.2015 13:10 ⇥
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see also: [[ROXXY2827-35]], [[ROXXY2827-34]], [[ROXXY2815]], [[ROXXY2824-34]], AntriebsTheorie | see also: AntriebsTheorie, [[en/MotorCurves]] |
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== Version V2 == {{https://www.mikrocontroller.com/images/MK36385V2_.JPG}} {{https://www.mikrocontroller.com/images/3holemount_1.JPG}} {{https://www.mikrocontroller.com/images/3holemount_2.JPG}} * 4 holes for propeller mount * for direct propeller mount |
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Plate for direct carbon propeller mount [[https://www.mikrocontroller.com/index.php?main_page=product_info&cPath=75&products_id=861|here]] |
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||RPM/V: || 770 Rpm/V || | ||RPM/V: || 760 Rpm/V || ||Wire resistance: || 0,11 Ohm || ||Phase resistance: || 0,07 Ohm || ||No-load Current: || 0,65A @ 10V || ||Num. magnetic poles: || 14 || |
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||Efficiency: || must still be measured || | ||Max. Efficiency (g/W): || 7.36 || |
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<<Include(en/MotorCurves, , from="##include_3638_begin", to="##include_3638_end")>> |
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The technical data and weight are the same for both types. |
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[[http://gallery.mikrokopter.de/main.php/v/tech/MK3638Compare1.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=80927}}]] [[http://gallery.mikrokopter.de/main.php/v/tech/MK3638Compare2.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=80931}}]] Also the shrink tube (cable protection) is longer. |
see also: AntriebsTheorie, en/MotorCurves
MK3638 & MK3538
Inhaltsverzeichnis
Photo
Version V2
- 4 holes for propeller mount
- for direct propeller mount
where to buy
The Motor is custom made for MikroKopter only. You can buy it here
Plate for direct carbon propeller mount here
Features
This motor has long wires (52cm), a short shaft and a small clipring. So it can be mounted directly on the aluminium arm.
Technical data
Voltage Lithium: |
3-6 |
Current: |
max 20A |
Current max. (60 Sek.): |
25 A |
RPM/V: |
760 Rpm/V |
Wire resistance: |
0,11 Ohm |
Phase resistance: |
0,07 Ohm |
No-load Current: |
0,65A @ 10V |
Num. magnetic poles: |
14 |
Propellers: |
10" - 14" |
Max. Efficiency (g/W): |
7.36 |
Electrical power: |
max 350 W |
Thrust max.: |
max 2200 g |
Weight (only motor) |
100g |
Weight incl. cable and adapter |
125g |
Dimensions: |
h=38 d=35 mm |
Shaft diameter: |
4 mm |
Mounting plan
Thrust over current
Different props
Same curve in higher resolution:
APC Propellers
13x6,5 APC
EPP-CF (chopped fiber)
How to read the curves
With this curves it is easy to estimate the needed current and even estimate the flight-time.
You can read the needed current for each needed thrust
Example
The total weight of a MikroKopter (4 Rotors) is 1400g -> so each motor needs a thrust of 350g for hovering (1400g / 4 = 350g)
Current needed for 350g with the 13x6,5 APC - Propeller? -> 1,8A
Current needed for 350g with the 12x8 APC - Propeller? -> 2,4A
The total current for all four motors would be 7,2A (4 * 1,8A) or 9,6A (4 * 2,4A)
Flight time
You can estimate the flight time with this formular:
Time = 54 * Lipo / Current
(54 because we estimate 10% losses -> 60 * 0,9)
In case we would have a 3300 Lipo (3,3Ah), the Flight time for the 13x6,5 would be:
Time = 54 * 3,3 / 7,2 = 24,7 min
The same for the 12x8 Prop:
Time = 54 * 3,3 / 9,6 = 18,5 min
That is a different of 33% in flight time!
See also: FlugZeit
Rotation direction
Clockwise (seen from above)
Connection:
- A = gray
- B = blue
- C = black
Counter-clockwise (seen from above)
Connection:
- A = blue
- B = gray
- C = black
difference MK3538 vs. MK3638
The technical data and weight are the same for both types.
Compared to the MK3538 the MK3638 has laser engravings and bigger ball bearings. The bigger bearings make the motor more silent.
Also the shrink tube (cable protection) is longer.