MAINTEX Product Catalog
Frameless torque motor 104LW02
Product description
Maintex's frameless torque motors are widely used in China for quadruped robots (such as Unitree's robotic dogs), bipedal robots, smart agricultural machinery, e-bikes, and exoskeleton wearable devices.
Advantages of Maintex' factory :
1.Custom design drawings can be provided within 3 days
2.200+ patent
3.2-year warranty (70-person R&D team,offering remote support)
4.Support OEM/ODM
5.Provide certificates and test reports, such as ISO9001, IATF 16949, CE, ROHS, REACH and so on.
6.Collaborated with fortunne 500 companies
7. MOQ:100PCS (Custom samples upon request)
8. 24-hour on-line service
Product feature:
1. High torque
2. Smooth operation
3. high efficiency
4. High precision
5. lightweight
6. excellent heat dissipation performance
Thanks to their high copper-fill factor and innovative stator-rotor design, these frameless motors offer superior torque density, exceptionally low losses and highly dynamic performance, while also affording excellent heat dissipation. They may be used as direct drives with reduced motor speed and can be delivered with custom-matching, hollow-shaft safety brakes and absolute encoders.
Frameless servo motors from Maintex are ideal for designers exploring the boundaries of performance in robotics, medical, aerospace, optics and other technically challenging applications.
2.5 Nm direct drive frameless motor for smooth and stable operation
motor design & optimization
1. High-Precision Magnetic Circuit Design
Skewed slots or fractional-slot windings to minimize cogging torque and reduce torque ripple.
2. Premium Magnetic Materials
High-performance NdFeB permanent magnets and high-permeability silicon steel laminations for enhanced magnetic field uniformity.
3. Low-Harmonic Winding
Optimized winding distribution (e.g., sinusoidal windings) to suppress current harmonics and eliminate torque fluctuations.
Advantages：
1. Unmatched Power Density
2. Mechanical Integration Redefined
Model | Rated Voltage | Rated speed | Rated Current |
104LW02 | 28(V) | 300(rpm) | 7(A) |
Rated Torque | Peak Current | Rated Power | OD(mm) |
2.5(N·m) | 14(A) | 79(W) | 104 |
Peak Torque | Height(mm) | EMF constant | OperatingTemperature |
5(N·m) | 27 | 22.9(Vrms/krpm) | -40~+60°C |
| Model | 38LW03 | 60LW01 | 76LW02 | 85LW02 | 104LW02 | 127LW01 | 172LW03 | 172LW04 |
| Rated Voltage (V) | 48 | 48 | 48 | 48 | 28 | 48 | 12 | 12 |
| Rated speed (rpm) | 10300 | 4000 | 3900 | 1500 | 300 | 2400 | 30 | 30 |
| Rated Torque (N ·m) | 0.102 | 0.27 | 0.63 | 1.7 | 2.5 | 3.2 | 6.5 | 4.5 |
| Rated Power (W) | 110 | 114 | 258 | 267 | 79 | 800 | 20.5 | 14 |
| Rated Current (A) | 2.8 | 2.7 | 5.6 | 11 | 7 | 19.5 | 7 | 8.2 |
| Peak Current (A) | 8.8 | 13 | 36 | 42 | 14 | 39 | 13.8 | 11 |
| Peak Torque (N ·m) | 0.32 | 1.37 | 2.86 | 5.1 | 5 | 6.4 | 11.6 | 6 |
| EMF constant (Vrms/krpm) | 2.3 | 7.2 | 7.56 | 11.2 | 22.9 | 12.4 | 62 | 34.2 |
| wire resistance (Ω) | 1.2 | 0.75 | 0.28 | 0.28 | 0.67 | 0.09 | 0.41 | 0.41 |
| Wire Inductance (mH) | 0.48 | 0.39 | 0.25 | 0.27 | 0.96 | 0.18 | 1.01 | 0.83 |
| Pole Pairs (p) | 7 | 10 | 10 | 14 | 10 | 10 | 13 | 13 |
| Operating Temperature Range | -20～+40℃ | -20～+40℃ | -20～+40℃ | -20～+40℃ | -20～+40℃ | -20～+40℃ | -20～+40℃ | -20～+40℃ |
| Storage Temperatur | -10～+35℃ | -10～+35℃ | -10～+35℃ | -10～+35℃ | -10～+35℃ | -10～+35℃ | -10～+35℃ | -10～+35℃ |
| Insulation Class | F | F | F | F | F | F | F | F |
| phase | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Induction method | PM | PM | PM | PM | PM | PM | PM | PM |
| weight（g) | 75 | 212 | 400 | 505 | 800 | 1164 | 2750 | 1500 |
| OD （mm） | 38 | 60 | 76 | 85 | 104 | 127 | 172 | 172 |
| Height （mm) | 14.5 | 22.6 | 28.8 | 30 | 27 | 36 | 82 | 64 |
 | Customization of Size and Structure |  | Customized functions and options |  | Coil and magnet configuration |
 | Performance parameter customization |  | Material and processselection |  | Customization of leads and connectors |
FAQ:
Q1: How to choose a motor to match my machine?
A: Please offer us the key parameters of the motor such as physical size (diameter, length, etc), torque, voltage, power consumption, etc. Feel free to reach out to us, we are very glad to help you if you are confused in selection.
Q2: Could you provide customized service?
A: Yes, we can. All parameters can be customized according to your actual demands, for detailed information please contact us or leave a message.
Q3: Can I order samples first?
A: We stock many of our standard models. If you would like to test samples first, we are glad to send you some. Of course we do not stock specialized motors. If you have special needs, please let us know.
Q4: Are you trading company or manufacturer?
A: we are a manufacturer which is located in Shenzhen China. We have our own industrial park——Maintex Science & Technology Park covering an area of 53000+ square meters.
Q5: How long is your delivery time?
A: Generally about 5-10 days if the goods are in stock. Or it is 30 days if the goods are not in stock. It depends on the order quantity.
Q6: Do you provide samples?
A: Yes, sample can be offered in terms of your specific requirements.
Q7: What kind of payment terms are available?
A: We usually use TT and Paypal, but if you have special requirements, please talk with us.
Q8: How do you control your product's quality?
A: We have professional testing instruments and QC team, we will do full inspection for each mass production.
Q9: What about your production capability?
A: There are high precise auto assembly facilities and more than 60 assembly lines in our factory, we can produce more than 100 million pieces of motors per year.
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Product consultation
James Yang
Phone:+86 13699794382
Email:james.yang@maintexpt.com
Address: Maintex Science & Technology Park, No. 8 Kangming Rd., Pingdi Street, Longgang District, Shenzhen, China 518117