Ultra-Flat Actuators
NIDEC DRIVE TECHNOLOGY CORPORATION
Ultra-compact, lightweight, zero backlash strain wave actuator
Industry-leading torque-to-weight and torque-to-volume ratio
Three module sizes available with peak torque up to 110 Nm
Solution for service robots, AGVs, exoskeletons and assistive systems
© NIDEC DRIVE TECHNOLOGY AMERICA CORPORATION. WPM Series Strain Wave Actuators /.
NIDEC DRIVE TECHNOLOGY CORPORATION • Wall Street, Glendale Heights, IL USA • Phone: () - • info@nidec-dtc.com
WPM Series Ultra-Flat Actuators consist of an ultra-at strain wave gear set and precision cross roller bearing combined with a compact
and highly ecient brushless DC axial ux motor. The result is an optimal solution for applications requiring high power density in a com-
pact, light weight package. Three module sizes are available with up to ve reduction ratios. Compatibility with a broad range of servo
drives on the market ensures easy implementation into new or existing platforms.
The WPM Series is available in 36 VDC and is ideally suited for battery powered applications such as AGV drive wheels, exoskeleton robotic
joints and other assistive technologies. Our customers benet from optimally matched components, space savings and long service life.
WPM Series Strain Wave Actuators
70 Years of Motor & Drive Development. Your Competitive Advantage.
WPM-42 WPM Series WPM-50 WPM-63
Outer Diameter mm mm mm
Thickness mm . mm . mm
Mass g g , g
Gear Ratio¹ : : :
Power Supply V DC V DC V DC
Rated Capacity W W W
Rated Current 4.7 A 6.5 A 12 A
Peak Current . A A A
Rated Torque Nm Nm Nm
Peak Torque Nm Nm Nm
Rated Speed rpm rpm rpm
Rotor Inertia . kgcm² . kgcm² . kgcm²
Lost Motion ≤ 1 arc-min ≤ 1 arc-min ≤ 1 arc-min
Back Drivability . Nm . Nm . Nm
Motor Type BLDC Axial Flux BLDC Axial Flux BLDC Axial Flux
Motor Position Sensor Hall IC Hall IC Hall IC
Incremental Encoder Sensor , pls/rev , pls/rev , pls/rev
Thermo Sensor Two Thermistors Two Thermistors Two Thermistors
¹ Additional gear ratios available upon request