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20mm Outer Rotor Brushless DC Motor

Compact Size Brushless DC Motor

Features: high quality, high precision

Applications: robot, coffee machine

 

 

Key Advantages of the Outer Rotor Design:

Compact & Flat Profile: The outer rotor architecture enables an extremely low axial height and space-saving form factor, making it an ideal solution for applications with strict restrictions on installation space and thickness.

High Torque Density: By utilizing the outer shell as the rotating component for direct torque output, this design achieves a higher torque density within the same volume, providing superior power for direct-drive applications requiring high torque.

Smooth Operation & Enhanced Cooling: The rotating outer casing acts as an effective heat sink, significantly increasing the surface area for improved thermal dissipation. This design also contributes to excellent dynamic balance, ensuring remarkably smooth and quiet performance.

High Quality: Manufactured with premium materials for durability and long-term reliability.

High Precision: Ensures accurate control and consistent performance for demanding tasks.

Ideal For: Robotics, coffee machines, and other applications requiring a reliable micro motor.

 

GENERAL SPECIFICATION                         

       

Winding type Star Insulation Resistance 100MΩMin. ,500VDC
Hall effect angle 120 degree electrical angle Dielectric Strength 300VAC for one minute
Resistance Accuracy ±10% @20℃ Shaft Radial Play 0.02Max. (450 g-load)
Inductance Accuracy ±20% @1kHz Shaft Axial Play 0.15Max. (450 g-load)
Ambient Temperature -20℃~+50℃ Insulation class Class B

ELECTRICAL SPECIFICATION

Model 20DMWO10-0630 20DMWO10-0940
Number of poles 8
Number of phase 3
Rated voltage VDC 6 9
Rated speed RPM 3090 4180
No-load speed RPM 9130 9760
No-load current A 0.3 0.3
Rated power W 1 2
Rated torque mN.m 3.21 4.05
Rated current A 0.55 0.48
Peak torque mN.m                  9.63 12.15
Peak current A 1.65 1.44
Maximum efficiency % 60 65
Line to line resistance ohms 4.2 7.5
Line to line inductance mH 0.6 1.2
Torque constant mN.m/A 6.0 8.4
Back E.M.F Vrms/KRPM 0.46 0.65
Rotor inertia g.cm2 3.9
Weight Kg 0.015
Length mm 10

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