45mm Outer Rotor Brushless DC Motor
Application
The 45mm outer rotor brushless DC motor, FL45BLW series, can be applied to robot, AGV, turnstile, coffee maker and so on.

Winding Connection Mode | Star |
Electrical Angle | 120° |
Radial Play | 0.02mm at 4N |
End Play | 0.04mm at 4N |
Max. Radial Force | 28N |
Max. Axial Force | 10N |
Insulation Class | Class B |
Dielectric Strength | 500V AC for one minute |
Insulation Resistance | 100MΩ Min., 500V DC |
Connector | Pin number | Function | Remark |
CN1 | 1 | Phases U | |
2 | Phases V | ||
3 | Phases W | ||
CN2 | 1 | GND | Hall GND |
2 | Vcc | Hall Input | |
3 | Hall A | 5VDC-- 24VDC | |
4 | Hall B | ||
5 | Hall C |
Unit | Tolerance | FL45BLW18-24V-6530A | FL45BLW21-24V-6750A | FL45BLW27-24V-6170A | |
Number of Poles | 16 | 16 | 16 | ||
Number of Phases | 3 | 3 | 3 | ||
Rated Voltage | VDC | 24 | 24 | 24 | |
No-load Speed | RPM | ±10% | 6500 | 6700 | 6100 |
No-load Current | A | <0.4A | 0.27 | 0.33 | 0.38 |
Rated Speed | RPM | ±10% | 5000 | 5260 | 4840 |
Rated Torque | mN·m | 50 | 84 | 130 | |
Rated Power | W | 30 | 50 | 70 | |
Peak Torque | mN·m | 150 | 250 | 390 | |
Peak Current | A | ±10% | 4.8 | 7.8 | 11 |
Line to line Resistance | Ω at 25℃ | ±10% | 1.42Ω | 0.71Ω | 0.56Ω |
Line to line Inductance | mH | ±20% | 0.59 | 0.43 | 0.27 |
Torque Constant | mNm/A | ±10% | 35.3 | 34.2 | 37.2 |
Back EMF Constant | Vrms/KRPM | ±10% | 2.61 | 2.34 | 2.75 |
Rotor Inertia | g·cm2 | 99 | 135 | 181 | |
Weight | g | 80 | 120 | 150 |

Advantages
Compared with the inner rotor motor, the flat outer rotor brushless motor has a more compact structure and lower torque ripple.
Under the same volume, the outer rotor brushless motor will output a greater torque than the inner rotor motor.
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