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Frameless Motor

Our frameless motors are built on ultra-high torque density. Beyond this, they excel in dynamic response, precision, thermal management, efficiency, noise, and weight. 

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Advanced Design
Features
Performance data
Size
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Design for rapid dynamic response and precise control

We have previously designed motors for aircraft starter-generator and electric vehicles, with advanced design and craftsmanship. We are now applying these technologies to our frameless motors, ensuring they deliver industry-leading performance.

  1. Unique Flat Wire Winding:
    • High fill factor, low copper loss, better cooling, minimal air gaps, and increased stability.
    • Ensures consistent winding for smooth operation and precise control.
  2. Tiny and Thin Stator Laminations:
    • Reduces eddy current and hysteresis losses for better efficiency.
    • Boosts dynamic performance and precise high-frequency control.
    • Generates less heat, reducing vibration and noise.
    • Increases strength and stability.
  3. Halbach Electromagnetic Design:
    • Provides stronger torque, lighter weight, and smoother operation.
  4. Low Cogging Design:
    • Reduces cogging torque for smoother output.
    • Decreases vibration and noise.

Features

Our frameless motors are exceptional in the following advantages:

  • High Torque Density
  • Low Torque Ripple
  • High Dynamic Response
  • High Precision: Compatible with 32-bit encoders, as a frameless servo motor. Of course, Hall sensors are also optional.
  • Enhanced Thermal Management: low heat generation and better heat dissipation
  • Compact & Light: Larger hollow bore and lighter weight.
  • Efficient: Higher efficiency brings better heat dissipation, lower energy consumption.
  • Adaptable to Harsh Environments: Insulation class H. Can operate stably within a motor temperature range of -40°C to 155°C, and in ambient temperatures from -40°C to 80°C.

Select frameless motors that suit your equipment:

Performance data

Our motors are compatible with the following voltages: 12V, 24V, 36V, 48V. If you have specific requirements or need additional data, please feel free to contact us.

ModelFM 2506FM 2510FM 3808FM 3816FM 5010FM 5016FM 7013FM 7021FM 8507FM 8516FM 8525FM 8527FM 11527BOT FM 11513
Power (W)705295205195183235260405420415425750272
Rated Voltage (V)2424244848484848484848484848
Rated Torque (Nm)0.0320.0480.100.230.300.500.671.250.441.442.332.675.502.60
Peak Torque (Nm)0.1000.2000.400.761.001.402.184.001.204.557.408.4512.5021.66
Rated Speed (rpm)20,65010,3009,0008,5006,2003,5003,4002,0009,0002,8001,7001,5001,3001,000
Motor Constant (Nm/√W)0.0140.0200.0360.0600.0840.0980.1520.2330.1100.2800.4430.4800.7600.555
Rotor Inertia (kgcm2)0.00170.00260.01100.0230.0620.1000.2310.3700.3280.7241.161.254.321.96
Torque Ripple @ Rated Current2.45%2.93%4.62%4.26%3.17%3.35%2.43%2.24%4.76%3.26%3.14%2.83%2.88%3.30%
Torque Ripple @ Peak Current1.74%2.01%1.78%1.78%2.16%2.58%2.40%2.21%3.06%2.59%2.64%2.64%2.24%2.41%
Max Efficiency (%)8885888889889090929191919393
Detailed SpecsLearn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>Learn More>
Data may change with product updates.

Size

frameless motor Mounting Dimension
ModelFM 2506FM 2510FM 3808FM 3816FM 5010FM 5016FM 7013FM 7021FM 8507FM 8516FM 8525FM 8527FM 11527BOT FM 11513
Outer Diameter D / (mm)25.025.038.038.050.050.070.070.085.085.085.085.0115.0115.0
Inner Diameter d / (mm)11.611.618.018.030.030.042.042.052.052.052.052.074.089.5
Stator Length L / (mm)11.315.212.519.013.020.017.528.013.026.038.041.640.025.0
Weight / (g)16245582831352003201923705456701,050430
Data may change with product updates.


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