SHARE

Power Density

Power Density

Motor Power Density

Power Density

Definition

Power density (or volume power density or volume specific power) is the amount of power (time rate of energy transfer) generated per unit volume (of the motor). The more powerful and (or) the smaller the motor in envelope size, the higher the power density. Volume power density is an important consideration where space is constrained. The motor design aims to minimize space for the highest possible power output. High power density enables miniaturization of applications and end devices and is of the utmost importance for portable or wearable applications (e.g. miniature pumps and medical implantable devices).

Solution Overview

Magnetic flux path in a motor guides the magnetic field in the usable channel, thus minimizing losses. A small electric motor that produces high power but has high losses is not the most effective solution. Using innovative design concepts, our engineers develop high power density electric motors that can deliver maximum power in the smallest footprint. Powerful neodymium magnets and advanced magnetic circuit design generates higher electro-magnetic flux to deliver best-in-class power density. Portescap continues to innovate electromagnetic coil technologies to deliver power in ever-smaller motor sizes. We can build small DC motors with closer tolerances because of our advanced design. This results in less energy input per unit of torque output because of a narrowed air gap between the rotor and the stator.

Portescap Technology

Portescap's patented brushless slotless winding design delivers unmatched motor power density to a spectrum of medical and industrial applications. Gearhead integration provides high power density electric motors for high torque applications. Our customized winding design provides optimized solutions in the smallest possible envelope based on the application's specific performance needs. Linear actuator solutions with an integrated leadscrew provide high motor power density in a small package. This is an ideal solution for axial motion needs. Miniature integrated encoders (e.g. MR2), MRI filters and thermistor options are available to save space and reduce application footprint.

Surgical hand tools
Infusion systems
Diagnostic analyzers
Seat actuation
Pick and place
Robotics
Access systems

Surgical Motor Solutions

Our Surgical Motor Solutions are custom engineered to your needs, providing high speeds and high torque while maintaining efficiency for increased hand tool power and shorter surgery cases

Learn more

Ultra EC Brushless DC Motors

The three famililies of Ultra EC Brushless DC Motors not only meet a high range of requirements, but include our patented U coil for excellent performance, minimal iron losses and maximum efficiency

Learn more

Athlonix DC Motors

Althlonix DC Motors utilize an energy efficient coreless motor design to provide high power density with the proper balance to meet all your performance requirements

Learn more

Brushless DC Motors

A Brushless DC Motor offers a great combination of durability, efficiency, torque and speed in a compact package suitable for your application

Learn more

Brush DC Motors

Brush DC Motors are small but with high power density to provide the advantages of low friction, low starting voltages, minimal iron losses and superb speed-to-torque performance

Learn more

Disc Magnet Motors

Disc Magnet Motors are advanced micro stepper motors which supply exceptional dynamic motor performance, finer step resolutions and higher acceleration unparalleled by any other stepper motor on today's market

Learn more

Can Stack Motors

Our Can Stack Motors are long life, high performance stepper motors with open loop control solutions, converting electrical pulses into mechanical movements using the simplest techniques making them suitable for many applications

Learn more

Linear Stepper Motor

Linear stepper actuators create translational motion, coupling directly to the load to achieve incremental linear displacement without position feedback while delivering high linear force in a small design

Learn more

Related Products

Portescap provides a variety of gearheads, encoders, and drives usable with a wide range of motors to optimize your motor performance

Learn more

[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
22ECS45 ULTRA EC 0.90 22 68,500 300 120.0 26.80 3.80 0.47 3.30 73,000
22ECS60 ULTRA EC 0.90 22 43,000 270 180.0 44.50 6.30 0.74 5.10 60,000

[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)
ENT Microdebrider (24V) 0.50 12.7 855 11,829 39.5 5.60 2.44 449.3 63.6 2.40 17.00
ENT Microdebrider (48V) 0.50 12.7 375 11,910 41.3 5.90 1.27 490.7 69.5 4.80 34.10
Spine Drill 0.50 12.7 420 90,599 9.2 1.31 1.93 166.4 23.6 0.71 5.04
Arthroscopic Joint Shaver (7.2k rpm) 0.65 16.5 645 7,277 117.7 16.70 4.37 1 865.2 264.1 4.00 28.30
Arthroscopic Joint Shaver (4.2k rpm) 0.65 16.5 600 4,233 119.4 16.90 2.59 1 110.1 157.2 6.86 48.50
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
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
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
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) Max. Holding Force* @ .001" (0.0254 mm) / Step {%BR%}(N) Max. Holding Force* @ .001" (0.0254 mm) / Step{%BR%}(oz) Min. Holding Force @ 0.001" (0.0254mm) / Step (Un-energized){%BR%}(N) Min. Holding Force @ 0.001" (0.0254mm) / Step (Un-energized){%BR%}(oz) Max. Travel @ 0.001" (0.0254 mm) / Step{%BR%}(mm) Max. Travel @ 0.001" (0.0254 mm) / Step{%BR%}(in) Linear Travel Accuracy
20DAM-K 0.79 20.0 30.6 110.0 20.9 75.0 15.0 0.6 ± 1 Step
20DAM-L 0.79 20.0 30.6 110.0 20.9 75.0 50.0 2.0 ± 1 Step

[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