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  3. NeuMotors 2500 Series BLDC Motors: 1,500 to 9,000 watt class

2500 SERIES BRUSHLESS MOTORS

2500 SERIES QUICK LOOK:

  • 66mm OD
  • Inrunner construction
  • Power up to 6,000W
  • high torque operation 7,500 or higher max RPM
  • 16 poles / 18 slots – high pole count for high torque
  • 12mm shafts

OPTIONS:

  • Finned case
  • Waterproof case
  • Internal fan for better cooling
  • Stator can be skewed for reduced cogging and acoustic signature
  • US component sourcing and assembly available

May be mated with P62 gearboxes for very high power-to-weight drives.

Lift E Foils powered by Neumotors 25xx series motors.

25XX LENGTHS & POWER RANGES

LENGTH
Continuous
Watts*
Max
Watts*
Physical
Length
Weight
Price*
1,500
3,000
75mm
897g
$869.00*
3,000
6,000
114mm
1,746g
$979.00*

*  Volume discount available.

2515: 1,500-3,000 watt class BLDC motors

Price: $869.00* each.  Volume discount available.

Motor RPMs
per Volt
(KV)
Rm (Ohms) Io
@
10V
Torque
Constant
(mNm/A)
Torque
Constant
(inOz/A)
Max
Volts
Max
Amps
2515 I/6D/184 184 0.043 0.900 52.002 7.364 41 74
2515 I/5.75D/192 192 0.040 0.939 49.835 7.057 39 77
2515 I/5.5D/200 200 0.036 0.982 47.842 6.775 38 80
2515 I/3Y/204 204 0.032 1.000 46.904 6.642 37 82
2515 I/5.25D/210 210 0.033 1.029 45.564 6.452 36 84
2515 I/5D/220 220 0.030 1.080 43.493 6.159 34 88
2515 I/2.75Y/223 223 0.027 1.091 42.908 6.076 34 89
2515 I/4.75D/232 232 0.027 1.137 41.243 5.841 32 93
2515 I/2.5Y/245 245 0.023 1.200 39.055 5.531 31 98
2515 I/4.5D/245 245 0.024 1.200 39.055 5.531 31 98
2515 I/4.25D/259 259 0.022 1.271 36.944 5.232 29 104
2515 I/2.25Y/272 272 0.018 1.333 35.178 4.982 28 109
2515 I/4D/275 275 0.019 1.350 34.794 4.927 27 110
2515 I/3.75D/294 294 0.017 1.440 32.546 4.609 26 118
2515 I/2Y/306 306 0.014 1.500 31.269 4.428 25 122
2515 I/3.5D/315 315 0.015 1.543 30.376 4.302 24 126
2515 I/3.25D/339 339 0.013 1.662 28.225 3.997 22 136
2515 I/1.75Y/350 350 0.011 1.714 27.338 3.871 21 140
2515 I/3D/367 367 0.011 1.800 26.072 3.692 20 147
2515 I/2.75D/401 401 0.009 1.964 23.861 3.379 19 160
2515 I/1.5Y/408 408 0.008 2.000 23.452 3.321 18 163
2515 I/2.5D/441 441 0.007 2.160 21.697 3.073 17 176
2515 I/1.25Y/490 490 0.006 2.400 19.527 2.765 15 196
2515 I/2.25D/490 490 0.006 2.400 19.527 2.765 15 196
2515 I/2D/551 551 0.005 2.700 17.366 2.459 14 220

2530: 3,000-6,000 watt class BLDC motors

Price: $979.00* each.  Volume discount available.

Motor RPMs
per Volt
(KV)
Rm (Ohms) Io
@
10V
Torque
Constant
(mNm/A)
Torque
Constant
(inOz/A)
Max
Volts
Max
Amps
2530 I/6D/92 92 0.086 0.900 104.004 14.728 82 74
2530 I/5.75D/96 96 0.079 0.939 99.671 14.115 78 77
2530 I/5.5D/100 100 0.073 0.982 95.684 13.550 75 80
2530 I/3Y/102 102 0.065 1.000 93.808 13.284 74 82
2530 I/5.25D/105 105 0.066 1.029 91.128 12.905 71 84
2530 I/5D/110 110 0.060 1.080 86.985 12.318 68 88
2530 I/2.75Y/111 111 0.054 1.091 86.202 12.207 68 89
2530 I/4.75D/116 116 0.054 1.137 82.486 11.681 65 93
2530 I/4.5D/122 122 0.049 1.200 78.430 11.107 61 98
2530 I/2.5Y/122 122 0.045 1.200 78.430 11.107 61 98
2530 I/4.25D/130 130 0.043 1.271 73.603 10.423 58 104
2530 I/2.25Y/136 136 0.036 1.333 70.356 9.963 55 109
2530 I/4D/138 138 0.038 1.350 69.336 9.819 54 110
2530 I/3.75D/147 147 0.034 1.440 65.091 9.218 51 118
2530 I/2Y/153 153 0.029 1.500 62.539 8.856 49 122
2530 I/3.5D/157 157 0.029 1.543 60.945 8.631 48 126
2530 I/3.25D/169 169 0.025 1.662 56.618 8.018 44 135
2530 I/1.75Y/175 175 0.022 1.714 54.677 7.743 43 140
2530 I/3D/184 184 0.022 1.800 52.002 7.364 41 147
2530 I/2.75D/200 200 0.018 1.964 47.842 6.775 38 160
2530 I/1.5Y/204 204 0.016 2.000 46.904 6.642 37 163
2530 I/2.5D/220 220 0.015 2.160 43.493 6.159 34 176
2530 I/1.25Y/245 245 0.011 2.400 39.055 5.531 31 196
2530 I/2.25D/245 245 0.012 2.400 39.055 5.531 31 196
2530 I/2D/275 275 0.010 2.700 34.794 4.927 27 220
2530 I/1Y/306 306 0.007 3.000 31.269 4.428 25 245
2530 I/1.75D/315 315 0.007 3.086 30.376 4.302 24 252
2530 I/1.5D/367 367 0.005 3.600 26.072 3.692 20 294
2530 I/0.75Y/408 408 0.004 4.000 23.452 3.321 18 326
2530 I/1.25D/441 441 0.004 4.320 21.697 3.073 17 353
2530 I/1D/551 551 0.002 5.400 17.366 2.459 14 441

LEAD TIME

Neutronics assembles motors to order.  Most motors in this series are ready to ship from our San Diego office within 3-6 weeks.  Lead time varies with quantity, customizations, and supply chain considerations.  Rush orders may be available.

Please email us to confirm delivery estimates for your motor needs. info@neutronics.com

*Prices:

Prices subject to change without warning due to possible imposition of tarriffs. 

MOTOR KV:

The motor sizes and KVs listed above are the most common for this particular motor range. Custom sizes and  KV (RPMs per volt) are usually available.  Please contact us for more details if you don't immediately see the solution you are seeking in the tables above.

KV is the term used in the brushless motor workspace to specify the number of rotations per minute that a motor will turn for each volt applied to the motor/ESC with no load on the motor.

Neutronics specifications are +/- 5%.

For a more complete discussion of KV, please go to our KV FAQ page.  

MOTOR Io @ 10V:

The no load current of a brushless motor is defined as the current the motor draws, with no load applied, at a specific voltage. The no load current is measured in Amps and denoted “Io.”  Neumotors measures Io amperage at 10v DC input to speed controller. 

MOTOR RESISTANCE:

The resistance of a brushless motor is the leg to leg resistance of the stator, measured in ohms. The value listed in the motor's data sheet is typically the resistance at room temperature (22°C).

MOTOR RESISTANCE:

The resistance of a brushless motor is the leg to leg resistance of the stator, measured in ohms. The value listed in the motor's data sheet is typically the resistance at room temperature (22°C).

POWER RATINGS (Watts):

  • Continuous rating is the power the motor can deliver while maintaining the external housing temperatures below 100C.
  • MAX power is achieved at max RPMs and voltage, not at a partial throttle or reduced voltage.
  • MAX power rating is the power the motor can deliver beginning with motor at a temp of 20C until it reaches it's limit temperature of 100C.
  • The ratings are therefore dependent on a number of variables including air flow, ambient air temperature, contact cooling etc. Each application will present different variables.  

MTBF RATINGS:

When used within the constraints described above, BLDC motors' primary "wear" item(s) are the bearings supporting the shaft. Bearing life is inversely affected by speed, temperature, and radial and axial loads.  While an MTBF figure can be generated, it would be rendered invalid by excursions beyond prescribed temperatures or load limits - such as prop strikes, or side loads.  MTBF must be determined on a case by case basis, and even then, it would be subject to numerous exceptions.

MAX VOLTAGE

Max voltage is limited by the following concerns:

1. Mechanical redline.  The motor should not be driven faster than the mechanical limits of the motor which is determined as Kv (RPMs per volt) times the applied voltage.  Max voltage must be kept below the voltage which will spin the motor over max rpm for the motor series.

2. In some cases, usually where the Kv is very low, voltage times Kv is under the mechanical redline.  In these cases, the insulation of the winding wire must be considered.  Our standard winding is safe up to 130V.  We hi-pot test all standard-wind motors at 300V.   We offer a high voltage winding for use up to 450 volts.  We can also build motors for voltages beyond 450 volts, please contact us for more information.

MAX AMPERAGE

See power ratings above.

COMPONENT SPECIFICATIONS

  • Winding temperature:  -- 180C
  • Magnet grade: - 180C UH grade
  • Bearings:  Japanese SPB bearings

CONTROLLER SETTINGS: TIMING

  • APD controllers automatically adjust timing for optimum efficiency
  • Recommend low timing for controllers that require configuration

POLE COUNT vs. POLE PAIRS

  • Neumotors lists the number of poles in a motor rotor. Example: N S N S would be a four pole motor.
  • Some ESC manufacturers use the term "pole pairs" which refers to the number of N and S pairs.  Example: N S N S would be a 2 pole-pair motor.

Neumotors Naming Convention Details

NOTE: Innrunners use imperial dimensions (inches), outrunners use metric dimensions (mm).

Using the 1530/.75D (2640 KV) as our example:  1530/.75D (2640 KV) should be read as 15 | 30 | .75 | D which runs at 2,640 RPMS per volt.


1530/.75D (2640 KV)

The last part of the code - the Kv, is the voltage constant.* It represents the number of RPMs the motor will spin for each volt applied to the motor by the speed control.  A 1,000 KV motor should spin at 10,000 RPMs when 10 volts are applied to an unloaded motor (10 x 1,000 = 10,000).

The Kv of a particular motor size is determined by the number of turns of wire around the stator teeth.  The length of the motor and the type of wire termination inside the motor also determine the motor Kv.

*Kv in this context does not mean kilovolt.  We aren't working with kilovolts here!!


1530/.75D (2640 KV)

The first two digits are the motor's internal diameter in inches. 15 = 1.5" inches - so all 15 series are the same internal diameter.


1530/.75D (2640 KV)

The second two digits represent the motor's internal length, the stator stack, specifically. 30 is 3.0 inches - so a 1530 is 3 inches long inside and a 1539 is 3.9 inches long inside the case. Longer motors have more power capability and more weight.


1530/.75D (2640 KV)

The 3rd set of digits is the number of times the internal wires are wrapped around the stator teeth. 1530/.75D has .75 wraps of the wire inside the motor around the steel teeth of the stator.


1530/.75D (2640 KV)

The final letter refers to the internal connection of the 3 motor wires. D = Delta, the Greek letter for D that looks like a triangle. The other option is Y, and the Y wind looks like a letter Y on a wiring diagram.  A Delta motor will spin 1.8 times the Kv of a Y motor with the same number of turns.  Change the turns in a Y motor and it will spin just as fast as a Delta with nearly identical performance.

NOTE: This system applies to the NEUMOTORS INRUNNERS.  OUTRUNNERS are the same format, but they are in metric units (MM).