Motor parameters
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Racerstar BR2212
Turnigy SK3 5055
Odrive D5065Keda 6364Odrive D6374
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Rated kVrpm/V1000280270190150
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Measured kVrpm/V1058276259182151
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Phase ResistanceOhm0.1280.0320.0390.0390.039
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Phase InductanceH1.84E-051.33E-052.02E-052.13E-052.81E-05
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Weightkg0.0450.3890.4110.6470.885
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Price$ USD652694799
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Torque constant (Kt)
N·m/A0.0080.0290.0300.0420.053
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Kt/kgN·m/A/kg0.1720.0730.0730.0650.060
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Kt/$ USDN·m/A/$ USD0.001290.000550.000430.000900.00054
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Motor constant (Km)
N⋅m/sqrt(W)0.020.160.150.210.27
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Km/kgN⋅m/sqrt(W)/kg0.4850.4170.3690.3290.308
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Conversion constant
8.18.28.28.28.2
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15
Pole Pairs-77777
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Slots-1212121212
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bell diamm2848.8506363
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string positionmm200200200200200
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arm lengthmm500500500500500
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kV Calculations
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Motor FreqHz55.854.4753.352.8552.3
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V pk - pkV0.9523.563.725.246.24
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Correction Factor0.950.950.950.950.95
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URL
https://www.banggood.com/Racerstar-BR2212-1000KV-2-4S-Brushless-Motor-For-RC-Airplane-p-1083190.html?rmmds=search&cur_warehouse=CN
https://hobbyking.com/en_us/turnigy-aerodrive-sk3-5055-280kv-brushless-outrunner-motor.html
https://odriverobotics.com/shop/odrive-custom-motor-d5065
https://hobbyking.com/en_us/kd-53-30-high-voltage-brushless-outrunner-190kv.html?___store=en_us
https://odriverobotics.com/shop/odrive-custom-motor-d6374-150kv
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motor bell surface area
mm^21055.5751328432.03468210210.1761212666.9015814646.10495
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km per rotor surface area
0.000020472763670.000019074437130.000014770390820.000016830273670.0000183480337
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Current (I)Current (I)
measured mass (g)
measured mass (g)
measured mass (g)
measured mass (g)
measured mass (g)
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0000000
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10111.5419519536722
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20241.21007100911191358
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30370.61481150016462198
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40494.51932197022532718
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505112.82371249827603560
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606128.82852284031874087
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70714331763592
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8173.1
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9188.4
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Current (I)Current (I)
foce on arm (N)
foce on arm (N)
foce on arm (N)
foce on arm (N)
foce on arm (N)
40
0000000
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1010.2817510.265512.715513.13217.689
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2021.009424.671524.720527.415533.271
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3031.729736.284536.7540.32753.851
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4042.3152547.33448.26555.198566.591
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5052.763658.089561.20167.6287.22
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6063.155669.87469.5878.0815100.1315
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7073.503577.81288.004
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84.24095
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94.6158
50
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Current (I)Current (I)Torque (N.m)Torque (N.m)Torque (N.m)Torque (N.m)Torque (N.m)
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0000000
53
1010.00394450.25047820.31788750.4136580.5572035
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2020.01413160.60198460.61801250.863588251.0480365
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3030.02421580.88534180.918751.27030051.6963065
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4040.03241351.15494961.2066251.738752752.0976165
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5050.03869041.41738381.5300252.130032.74743
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6060.04417841.70492561.73952.459567253.15414225
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7070.0490491.94532.772126
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80.0593733
61
90.0646212
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Current (I)Current (I)
Motor constant
Motor constant
Motor constant
Motor constant
Motor constant
63
64
1010.011020624820.14112847760.16023145150.2082130110.2808281638
65
2020.019741293160.16958994870.15575485030.21734175310.2641029408
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3030.022552351090.16627786430.15436556020.21313346780.2849770564
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4040.022640196650.16268509470.15205007680.21879846730.2642974201
68
5050.021619590960.15972105990.15424206780.21442832480.2769385771
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6060.0205718330.16010279160.14613273040.20633546830.2649456846
70
7070.019577010560.14007571980.1993339914
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80.02073554519
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90.02006073156
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average0.021845992930.16219670260.15169760880.2131739320.2727896845
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Current (I)Current (I)
Torque constant
Torque constant
Torque constant
Torque constant
Torque constant
75
1010.00394450.025047820.031788750.04136580.05572035
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2020.00706580.030099230.0309006250.04317941250.052401825
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3030.0080719333330.029511393330.0306250.042343350.05654355
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4040.0081033750.028873740.0301656250.043468818750.0524404125
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5050.007738080.0283476760.03060050.04260060.0549486
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6060.0073630666670.028415426670.028991666670.04099278750.0525690375
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7070.0070070.027790.0396018
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80.0074216625
83
90.007180133333
84
average0.0080.0290.0300.0420.053
85
86
Conversion constant (using rated Kv)
87
Current (I)Current (I)
conversion constant'
conversion constant'
conversion constant'
conversion constant'
conversion constant'
88
1013.9445
89
2027.0658
90
3038.0719333338.2631901338.268758.04523658.4815325
91
4048.1033758.08464728.144718758.2590755637.866061875
92
5057.738087.937349288.2621358.0941148.24229
93
6067.3630666677.9563194677.827757.7886296257.885355625
94
7077.0077.50337.524342
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average8.18.28.28.28.2
96
97
Current (I)Current (I)
Torque constant per kg
Torque constant
Torque constant
Torque constant
Torque constant
98
1010.087655555560.064390282780.077344890510.063934775890.06296084746
99
2020.15701777780.07737591260.075184002430.06673788640.05921110169
100
3030.17937629630.075864764350.0745133820.065445672330.06389101695
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