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Brushless Rotary Motor - TWR-070-410-1150-3PH

Brushless Rotary Motor,a rotary motor,product,TWR-070-410-1150-3PH The TWR-070-410-1150-3PH rotary 3-phase brushless motor, also known as a rotary servo motor, is a direct drive motor that is ideal for limited or unlimited, closed loop servo, rotary motion applications. It can generate a continuous/peak torque of 480 in-lbs [53 Nm]/1440 in-lbs [159 Nm]. It has been designed to have a 70° rotation and operate on a 20” (500 mm) radius, but additional modular magnet tracks (33° each) can be added to increase angular displacement. It is capable of very precise position, velocity, and acceleration control when coupled with a rotary encoder for position feedback. The vacuum encapsulated moving motor coil assembly moves through a gap in the long "U" shaped magnet assembly. A customer supplied bearing system is required to guide the moving coil assembly and to maintain a .050" [1.25 mm] clearance between the magnet and the coil assembly. There is no attractive force between the motor coil and the magnet assembly. The 3-phase motor coil assembly can be commutated trapezoidally using integral Hall Effects or sinusoidally using software commutation in conjunction with the appropriate amplifier or motion controller and encoder feedback. The power to the motor (from a brushless servo amplifier) is supplied via a high-flex motor power cable. Custom motors can be designed to fit customer specific application needs. Larger motors with higher torques are available, consult the factory for details and drawings.

• Zero cogging
• High speed and accelerations of light loads
• Low moving mass
• Multiple motors coils inside a single magnet assembly
• Uses standard 3-phase brushless amplifier

To determine your motion profile needs, use our rotary motion calculator.

Product Drawing
Device Type1 2
Continuous Torque Range70 degrees1.22 rad
# of Poles27
Radial Clearance1 in2 mm
Housed w/ BearingsNo
Rotor Inertia1 oz-in²2 kg-m²
Total Mass1 oz2 grams
Resistance @ 20C1 ohms2
Inductance @ 20C1 mH2
Electrical Time Constant1 msec2
Motor Constant1 in-oz/√watt2 N-cm/√watt
Torque Constant1 in-oz/amp2 N-cm/amp
Back EMF1 V/rad/sec2
Torque @ 100% Duty7680 in-oz0.53 N-cm
Power @ 100% Duty1 watts2
Torque @ 10% Duty23040 in-oz1.59 N-cm
Power @ 10% Duty1 watts2
Outside Diameter4 in
Housing Thickness1.7 in
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