The BO2814N2B is a compact 28mm outer rotor BLDC motor series designed for sensorless operation. Optimized for UAVs and aeromodelling, it offers high efficiency, robust performance, and customizable options including gear heads, encoders, and special coils. This versatile motor excels in demanding applications where space, weight, and reliability are critical.
| Parameter | Unit | BO2814N2B01-153-12.0 | BO2814N2B02-153-24.0 | BO2814N2B03-153-36.0 |
|---|---|---|---|---|
| Voltage | V | 12.0 | 24.0 | 36.0 |
| Terminal resistance | Ω | 0.50 | 1.70 | 3.77 |
| No-load speed | rpm | 15300 | 15300 | 15300 |
| No-load current | A | 0.26 | 0.12 | 0.12 |
| Stall torque | mNm | 179 | 207 | 209 |
| Stall current | A | 24.2 | 14.1 | 9.6 |
| Nominal torque | mNm | 34.1 | 35.0 | 31 |
| Nominal speed | rpm | 9330 | 10390 | 10980 |
| Nominal current | A | 4.8 | 2.4 | 1.5 |
| Max. output power | W | 71 | 83 | 84 |
| Max. efficiency | % | 80.4 | 82 | 78.8 |
| Back-EMF constant | mV/rpm | 0.8 | 1.5 | 2.3 |
| Torque constant | mNm/A | 7.5 | 14.8 | 22.2 |
| KV Value | rpm/V | 1268 | 642 | 425 |
| Speed/torque gradient | rpm/mNm | 85.2 | 74.5 | 73.0 |
| Rotor inertia | gcm² | 12 | 12 | 12 |
| Weight | g | 21 | 21 | 21 |
| Thermal resistance housing-ambient | K/W | 2.5 | 2.5 | 2.5 |
| Thermal resistance winding-housing | K/W | 2 | 2 | 2 |
| Thermal time constant motor | s | 180 | 180 | 180 |
| Thermal time constant winding | s | 25 | 25 | 25 |
| Operating temperature range | °C | -40~+120 | -40~+120 | -40~+120 |
| Thermal class of winding | °C | 180 | 180 | 180 |
| Axial play | mm | 0.014 | 0.014 | 0.014 |
| Radial play | mm | 0.008 | 0.008 | 0.008 |
| Axial load dynamic | N | 5 | 5 | 5 |
| Axial load static | N | 80 | 80 | 80 |
| Radial load at 3 mm from mounting face | N | 29 | 29 | 29 |
| No. of pole pairs | 7 | 7 | 7 | |
| Bearings | 2 ball bearings | 2 ball bearings | 2 ball bearings | |
| Protection class | IP | 20 | 20 | 20 |
| Commutation | Sensorless | Sensorless | Sensorless |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | BO2814N2B01-153-12.0 |
|---|---|---|
| Voltage | V | 12.0 |
| Terminal resistance | Ω | 0.50 |
| No-load speed | rpm | 15300 |
| No-load current | A | 0.26 |
| Stall torque | mNm | 179 |
| Stall current | A | 24.2 |
| Nominal torque | mNm | 34.1 |
| Nominal speed | rpm | 9330 |
| Nominal current | A | 4.8 |
| Max. output power | W | 71 |
| Max. efficiency | % | 80.4 |
| Back-EMF constant | mV/rpm | 0.8 |
| Torque constant | mNm/A | 7.5 |
| KV Value | rpm/V | 1268 |
| Speed/torque gradient | rpm/mNm | 85.2 |
| Rotor inertia | gcm² | 12 |
| Weight | g | 21 |
| Thermal resistance housing-ambient | K/W | 2.5 |
| Thermal resistance winding-housing | K/W | 2 |
| Thermal time constant motor | s | 180 |
| Thermal time constant winding | s | 25 |
| Operating temperature range | °C | -40~+120 |
| Thermal class of winding | °C | 180 |
| Axial play | mm | 0.014 |
| Radial play | mm | 0.008 |
| Axial load dynamic | N | 5 |
| Axial load static | N | 80 |
| Radial load at 3 mm from mounting face | N | 29 |
| No. of pole pairs | 7 | |
| Bearings | 2 ball bearings | |
| Protection class | IP | 20 |
| Commutation | Sensorless |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | BO2814N2B02-153-24.0 |
|---|---|---|
| Voltage | V | 24.0 |
| Terminal resistance | Ω | 1.70 |
| No-load speed | rpm | 15300 |
| No-load current | A | 0.12 |
| Stall torque | mNm | 207 |
| Stall current | A | 14.1 |
| Nominal torque | mNm | 35.0 |
| Nominal speed | rpm | 10390 |
| Nominal current | A | 2.4 |
| Max. output power | W | 83 |
| Max. efficiency | % | 82 |
| Back-EMF constant | mV/rpm | 1.5 |
| Torque constant | mNm/A | 14.8 |
| KV Value | rpm/V | 642 |
| Speed/torque gradient | rpm/mNm | 74.5 |
| Rotor inertia | gcm² | 12 |
| Weight | g | 21 |
| Thermal resistance housing-ambient | K/W | 2.5 |
| Thermal resistance winding-housing | K/W | 2 |
| Thermal time constant motor | s | 180 |
| Thermal time constant winding | s | 25 |
| Operating temperature range | °C | -40~+120 |
| Thermal class of winding | °C | 180 |
| Axial play | mm | 0.014 |
| Radial play | mm | 0.008 |
| Axial load dynamic | N | 5 |
| Axial load static | N | 80 |
| Radial load at 3 mm from mounting face | N | 29 |
| No. of pole pairs | 7 | |
| Bearings | 2 ball bearings | |
| Protection class | IP | 20 |
| Commutation | Sensorless |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
| Parameter | Unit | BO2814N2B03-153-36.0 |
|---|---|---|
| Voltage | V | 36.0 |
| Terminal resistance | Ω | 3.77 |
| No-load speed | rpm | 15300 |
| No-load current | A | 0.12 |
| Stall torque | mNm | 209 |
| Stall current | A | 9.6 |
| Nominal torque | mNm | 31 |
| Nominal speed | rpm | 10980 |
| Nominal current | A | 1.5 |
| Max. output power | W | 84 |
| Max. efficiency | % | 78.8 |
| Back-EMF constant | mV/rpm | 2.3 |
| Torque constant | mNm/A | 22.2 |
| KV Value | rpm/V | 425 |
| Speed/torque gradient | rpm/mNm | 73.0 |
| Rotor inertia | gcm² | 12 |
| Weight | g | 21 |
| Thermal resistance housing-ambient | K/W | 2.5 |
| Thermal resistance winding-housing | K/W | 2 |
| Thermal time constant motor | s | 180 |
| Thermal time constant winding | s | 25 |
| Operating temperature range | °C | -40~+120 |
| Thermal class of winding | °C | 180 |
| Axial play | mm | 0.014 |
| Radial play | mm | 0.008 |
| Axial load dynamic | N | 5 |
| Axial load static | N | 80 |
| Radial load at 3 mm from mounting face | N | 29 |
| No. of pole pairs | 7 | |
| Bearings | 2 ball bearings | |
| Protection class | IP | 20 |
| Commutation | Sensorless |
Technical specifications are for guidance only, as the individual drives and motors are configured for specific applications. Subject to technical and visual changes.
