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Torque

Torque

High torque stepper motors, brushless motors and DC motors

Torque Graphic

Definition

Torque is the amount of rotational force that a motor generates during operation. In a given application, the torque for each axis is defined by the specific requirement in the machine, which is required to move the object driven by the motor. The torque requirement of the axis determines the size of the motor and any gearing necessary.

Solution Overview

Portescap engineers aim to optimize the torque output of the motor during the design phase. The key components involved in torque production of the motor are the magnet, the winding and the flux path. The energy content of the magnet drives the strength of the motor but a balance must be achieved between power and cost. Also, the higher the number of pole pairs in the magnet, is the higher the amount of torque for the same dissipated power. High torque stepper motors are an example of this, as they have a higher number of pole pairs for a given motor size. Portescap engineers optimize the design based on the physical size, energy content, pole pair count and geometry of the magnet.

Copper content of the winding contributes to the power provided by the motor. Striking the right balance is important for creating high torque stepper motors that can maximize torque without drawing a tremendous amount of power. Flux path guides all of the magnetic field in the usable channel, minimizing losses. A high torque stepper motor that produces high power but has high losses does not benefit the application. Understanding the complete motor design allows Portescap engineers to pack the most power possible into the smallest motor package.

Portescap Technology

Portescap designed the Athlonix DC Coreless motors to maximize torque output while keeping the diameter and length minimal. High-energy neodymium magnets provide the foundation for the torque density of this motor series. High-capacity windings increase current density and electromagnetic intensity with minimal joule heating. The advanced air gap design requires less power to achieve the high torque output, allowing the motor to operate at a high efficiency. An additional method to increase torque output is by using gearheads. The DC gear motors provide a higher torque output through the gearbox with the accompanying reduction in output speed.

Infusion systems
Diagnostic analyzers
Pipettes
Power hand tools
Valve actuation
Access systems
Material handling

[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)
22ECP45 ULTRA EC 0.87 22 8,370 25 80.0 27.70 3.92 3.82 27.00 47,000
22ECP60 ULTRA EC 0.87 22 8,050 40 120.0 50.50 7.20 3.99 28.30 38,000

[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 Drill 1.10 27.9 900 957 818.2 115.90 8.23 11 098.0 1 571.7 16.40 116.00
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)
12G88 Athlonix 0.47 12 9,900 9.0 2.4 0.89 6.30 0.44 3.10 1.22 8.6
16DCP Athlonix - Graphite 0.63 16 8,684 13.2 1.1 0.45 3.16 0.31 2.18 3.00 21.2
16DCP Athlonix - Precious Metal 0.63 16 9,259 3.3 1.3 0.48 3.37 0.34 2.39 3.00 21.2
16DCT Athlonix - Graphite 0.63 16 9,648 51.7 4.0 2.22 15.70 0.72 5.06 1.23 8.7
16DCT Athlonix - Precious metal 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 8,200 4.0 4.9 1.56 11.00 0.89 6.30 3.92 27.7
17DCT Athlonix - Graphite 0.67 17 9,653 9.6 4.5 2.29 16.16 0.81 5.75 4.94 34.9
17DCT Athlonix - Precious Metal 0.67 17 9,800 2.6 4.7 2.33 16.43 0.85 6.00 4.94 34.9
22DCT Athlonix - Graphite 0.86 22 8,490 67.1 8.4 9.20 64.80 1.60 11.50 0.90 6.7
22DCT Athlonix - Precious metal 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
22NT82 Athlonix 0.87 22 8,500 50.0 14.0 9.35 66.00 2.40 16.80 0.93 6.6
24DCT Athlonix - Graphite 0.94 24 7,602 8.0 8.4 8.72 61.60 1.92 13.53 8.48 59.9
24DCT Athlonix - Precious Metal 0.94 24 7,631 4.0 8.6 8.79 62.10 1.95 13.79 8.48 59.9

[value]

Specification + Detail
MetricEnglish
Model Diameter{%BR%}(in) Diameter{%BR%}(mm) Holding Torque, Min{%BR%}(mNm) Holding Torque, Min{%BR%}(oz-in) Detent Torque, Max{%BR%}(mNm) Detent Torque, Max{%BR%}(oz-in) Linear Travel Accuracy Steps per Revolution
35L048D 1.38 35 54.0 7.6 12.1 1.8 7.5 48
42L048D 1.65 42 131.0 18.5 29.7 4.2 7.5 48

[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)
R13 13.0 0.51 55 250.0 35.0 7,500
R16 16.0 0.63 55 300.0 42.0 7,500
R22 22.0 0.87 50 600.0 85.0 5,000
R22HT 22.0 0.86 62 3,700.0 0.5 12,000