Thread: Mini-Review Dualsky XM5015TE-xx series
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Old Jan 27, 2013, 11:19 AM
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Antony (France)
Joined Sep 2003
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Dualsky "TE" series means Twenty Eight magnets.
I have also tested the XM4010TE family :
PM-BLDC outrunners 34.5x10 mm stator, with 24 slots and 28 mag poles. Laminations are 0.35mm thick
weight is around 79g.
Dualsky overview table is available here:
http://www.dualsky.com/downloads/Xmo...sheet_V1_1.pdf
They are high torque, high efficiency, specifically designed for Multi Rotor systems.
My general measurements and observations:
No stator traditional flange, just an alu stator tube diameter 24mm, drilled with eight 4mm holes,
plus four tappered M3 on 16mm and 19mm for fixing on the black cross provided.
Two ball bearings labeled 694Z that corresponds to metric BB : 4-11-4 mm
End bell with 5 spokes. Two tappered M3 holes / 12mm space. Black color.
Propeller to be fixed only on the rotor side (adapter with a set screw provided, prop hole 6mm, conical nut M6 hex 11.2mm).
Shaft 3.98mm inside, reduced to 3.17 mm rotor side, free 12mm, with a flat.
Shaft overall length = 38.9mm
Outer diameter (rotor flux ring) 39.7 mm
Body length 25.1mm
Connectors gold slotted 3.5mm male, cables length around 80mm.
Always the black card box with the pretty blue jacket.
All testings are conducted WOT no load on my bench with a Medusa PowerPro device and the WindowsXP ProView software. Recordings in .PAR file exported to EXCEL file for analysis.
The number of poles is set to 14 (28 is not possible), so I have to correct the rpm values (/2) .
ESC used is my CC Phoenix 60A 6S BEC, timing "low", 8 kHz, able to go down to 4V in.
Servo tester is a Leton. My power supply is a MASTECH HY3005D-2 (Linear CCCV 30V 10A max).
For internal resistance phase-phase measurement I use a constant current 2A or 4A and a DMM with good gold 3.5mm Y harness.
Black-blue, Blue-red, Red-black voltages are measured at around 20C ambient temperature, and averaged to give an average Rm.
The XM4010TE family corresponds to an excellent and original design + manufacturing.
The design of the stator is not common. Very "airy" and good for air passing through. No bulky stator flange.
It could be very easy to rewind.

#1 XM4010TE-5
Label on the box side indicates: serial number 57801, 880 rpm/V, weight 78g, peak power (15s) 353W, setup up 3S : prop 9x5 11x5+ a bar code.
Weight 79.5g (motor) + 7.5g accessories (prop adapter 3g and cross 4.5g)
Rm = 45.14 milliohm

a) No load @ 12.44 V Io 2.18A, 27.2 watt , 11165 rpm, flange temp 37C
taking Rm around 50 milliohm, we find :
Kv 905.3 rpm/V peakeff = 82.1% located at Ietamax = 23.2A and Petamax = 289W
b) No load @ 10.19 V Io 1.89A , 19.2 watt , 9132 rpm, flange temp 37C
Kv 904.7 rpm/V peakeff = 81.6% located at Ietamax = 19.6A and Petamax = 199W
c) No load @ 8.03 V Io 1.63A , 13.1 watt , 7191 rpm, flange temp 35.7C
Kv 904.4 rpm/V peakeff = 80.9% located at Ietamax = 16.2A and Petamax = 130W

An average Kv is around 905 rpm/V (voltage range 8V .. 13V) that is +2.8% upper announced Kv 880
From these testings I deduce one important curve : iron losses ( no load VxIo ) versus rpm.
This motor is very good to be used in the range 8-14V with an appropriate prop function of the voltage.
I recommend (in case of planes)
4S Lipo : prop 8x6E or 9x4.5E
3S Lipo : prop 10x7E
2S LiPo : prop 14x7E

#2 XM4010TE-6
Label on the box side indicates: serial number 57802, 720 rpm/V, weight 78g, peak power (15s) 377W, setup 3S : upto 13x6 + a bar code.
Weight 78.5g (motor) + 7.5g accessories (prop adapter 3g and cross 4.5g)
Rm = 68.6 milliohm

a) No load @ 15.0 V Io 1.75A, 26.2 watt , 11372 rpm, flange temp 36.3C
taking Rm around 76 milliohm, we find :
Kv 764.9 rpm/V peakeff = 82.1% located at Ietamax = 18.6A and Petamax = 278W
b) No load @ 12.09 V Io 1.49A , 18 watt , 9158 rpm, flange temp 35.8C
Kv 764.6 rpm/V peakeff = 81.6% located at Ietamax = 15.4A and Petamax = 186W
c) No load @ 10.06 V Io 1.32A , 13.3 watt , 7605 rpm, flange temp 34.9C
Kv 763.9 rpm/V peakeff = 81.1% located at Ietamax = 13.3A and Petamax = 133W

An average Kv is around 764 rpm/V (voltage range 10V .. 15V) that is +6.1% upper announced Kv 720
From these testings I deduce one important curve : iron losses ( no load VxIo ) versus rpm.
This motor is very good to be used in the range 10-16V with an appropriate prop function of the voltage.
I recommend (in case of planes)
4S Lipo : prop 10x5E or 9x6SF
3S Lipo : prop 11x8E
2S LiPo : prop 14x8.5E

#3 XM4010TE-7
Label on the box side indicates: serial number 57803, 620 rpm/V, weight 78g, peak power (15s) 338W, setup 4S : 12x5 + a bar code.
Weight 78g (motor) + 7.5g accessories (prop adapter 3g and cross 4.5g)
Rm = 85.6 milliohm

a) No load @ 17.07 V Io 1.55A, 26.5 watt , 11007 rpm, flange temp 35.7C
taking Rm around 95 milliohm, we find :
Kv 650.3 rpm/V peakeff = 82.3% located at Ietamax = 16.7A and Petamax = 285W
b) No load @ 13.96 V Io 1.36A , 19 watt , 9002 rpm, flange temp 35.0C
Kv 650.7 rpm/V peakeff = 81.7% located at Ietamax = 14.2A and Petamax = 198W
c) No load @ 11.07 V Io 1.18A , 13.1 watt , 7128 rpm, flange temp 33.3C
Kv 650.4 rpm/V peakeff = 81.0% located at Ietamax = 11.8A and Petamax = 131W

An average Kv is around 650 rpm/V (voltage range 11V .. 18V) that is +4.8% upper announced Kv 620
From these testings I deduce one important curve : iron losses ( no load VxIo ) versus rpm.
This motor is very good to be used in the range 10-16V with an appropriate prop function of the voltage.
I recommend (in case of planes)
5S Lipo : prop 8x8E
4S Lipo : prop 11x3.8E or 9x9E
3S Lipo : prop 12x10E

Embedded in Dualsky Calc new version 3.20 (27 jan 2013)

Louis
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