Brushless Rotary Motor,a linear motor,product,TWR-070-410-1150-3PH
Brushless Rotary Motor, 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

*Specifications are for a system with 3 arc segmented magnet tracks and 1 brushless rotary motor.

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

Continuous Torque Range70 degrees1.22 rad
# of Poles6
Radial Clearance0.05 in1.25 mm
Housed w/ BearingsNo
Rotor Inertia318.6 lb-in²0.09 kg-m²
Total Mass33.5 lb15.2 kg
Moving Mass2 lb0.9 kg
Resistance @ 20C3 ohms
Inductance @ 20C4 mH
Electrical Time Constant1.33 msec
Motor Constant69 in-lb/√watt7.6 N-m/√watt
Torque Constant120 in-lb/amp13.25 N-m/amp
Back EMF13.25 V/rad/sec
Torque @ 100% Duty480 in-lb53 N-m
Power @ 100% Duty48 watts
Torque @ 10% Duty1440 in-lb159 N-m
Power @ 10% Duty432 watts
Outside Radius20.5 in520 mm
Housing Thickness1.7 in43.2 mm
Product Drawing

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