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Industries

Motors for Exoskeleton Systems

Exoskeleton
Exoskeleton

Challenge 

Exoskeleton is an external structure that supports and protects a subject’s body. Powered exoskeletons are wearable robots or portable devices attached to a subject’s limbs, using principles of electro-simulation to first detect a subject’s movements and then replace or enhance them. These are typically used after an accident, disease or a periodic/permanent paralysis, across hospitals and rehabilitation centers that address the needs of elderly and handicapped persons, or even those afflicted with spinal cord injury, stroke, etc.

Exoskeletons commonly use miniature brushless DC motors with additional products such as gearboxes for attaining high torque and encoders for positional feedback. Typical application requirements include high torque, long battery life and the ability to work under load, e.g. in a seated position or on a staircase. Portescap's flat brushless DC and DC servo motors are designed for long battery operating time with a lightweight package, making them ideal to power exoskeleton applications.

Benefits 

  • High torque with compact size

  • Extended battery operating time

  • Long lifetime

  • High efficiency with low power consumption, weight and volume

  • Ability to work under load (e.g. sitting position, walking on staircase)

Customization Options 

  • Gearheads for high torque and finer resolution

  • Encoders for position feedback

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(in) Diameter{%BR%}(mm) No-Load Speed{%BR%}(rpm) Typical No-Load Current{%BR%}(mA) Max continuous mechanical power (@ 25°C){%BR%}(W) Max Continuous Torque{%BR%}(mNm) Max Continuous Torque{%BR%}(oz-in) Torque Constant (oz-in/A) Torque Constant (mNm/A) Max motor speed{%BR%}(rpm)
22ECT60 ULTRA EC 0.87 22 20,370 370 86.0 65.90 9.33 1.57 11.12 20,000
22ECT82 ULTRA EC 0.87 22 18,550 435 104.0 98.40 13.93 1.75 12.39 20,000

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(in) Diameter{%BR%}(mm) Max No-Load Current{%BR%}(mA) No-Load Speed{%BR%}(rpm) Continuous Stall Torque{%BR%}(mNm) Continuous Stall Torque{%BR%}(oz-in) Continuous Stall Current{%BR%}(A) Peak Torque for 1s{%BR%}(mNm) Peak Torque for 1s{%BR%}(oz-in) Torque Constant (oz-in/A) Torque Constant (mNm/A)
Large Bone Orthopedic Saw/Reamer (9.6V) 1.24 31.5 1 130 16,928 76.2 10.80 16.50 1 432.4 202.8 0.77 5.41
Large Bone Orthopedic Saw/Reamer (12V) 1.24 31.5 1 060 15,887 82.1 11.60 13.30 1 562.6 221.3 1.02 7.20
Large Bone Orthopedic Saw/Reamer (14.4V) 1.24 31.5 850 15,245 88.0 12.50 11.40 1 720.1 243.6 1.28 9.01
Large Bone Orthopedic Drill (9.6V) 1.24 31.5 1 130 16,928 76.2 10.80 16.50 1 432.4 202.8 0.77 5.41
Large Bone Orthopedic Drill (12V) 1.24 31.5 1 060 15,887 82.1 11.60 11.40 1 720.1 243.6 1.02 7.20
Large Bone Orthopedic Drill (14.4V) 1.24 31.5 850 15,245 88.0 12.50 11.40 1 720.1 243.6 1.28 9.01

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(in) Diameter{%BR%}(mm) No-Load Speed{%BR%}(rpm) No-Load Current{%BR%}(mA) Output Power{%BR%}(W) Stall Torque{%BR%}(oz-in) Stall Torque{%BR%}(mNm) Torque up to{%BR%}(oz-in) Torque up to{%BR%}(mNm) Torque Constant (oz-in/A) Torque Constant (mNm/A)
16DCT Athlonix - Graphite 0.63 16 9,648 51.7 4.0 2.22 15.70 0.72 5.06 1.23 8.7
0.63 16 7,970 9.4 4.2 1.81 12.77 0.76 5.36 1.52 10.7
16N78 Athlonix 0.63 16 9,475 60.0 4.7 1.63 11.50 0.85 6.00 0.21 1.5
22DCP Athlonix - Graphite 0.87 22 10,889 11.0 4.3 2.41 17.00 0.81 5.69 5.81 41.0
0.86 22 8,490 67.1 8.4 9.20 64.80 1.60 11.50 0.90 6.7
0.86 22 8,131 15.7 9.4 11.30 79.60 1.90 13.30 2.00 14.1
22N78 Athlonix 0.87 22 6,350 1.0 10.0 4.53 32.00 1.83 12.90 10.20 72.0

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(mm) Diameter{%BR%}(in) Max Efficiency{%BR%}(%) Nominal Torque{%BR%}(mNm) Nominal Torque{%BR%}(oz-in) Max. Recommended Input Speed{%BR%}(rpm)
R16 16.0 0.63 65 300.0 42.0 7,500
R22 22.0 0.87 50 600.0 85.0 5,000

[value]

Specification + Detail
MetricEnglish
Model Resolution{%BR%}(line counts) Type
MR2 4,8,16,20,32,40,50,64,80,100,128,160,200,250,256,400,500, 512 Magnetoresistive Encoder