The Exlar Advantage
Understanding the Difference
Integrating the Roller Screw with a Motor
The next step in bringing a unique solution to the marketplace and satisfying this quest for a better actuation product resulted in the integrated actuator. This concept uses a brushless servomotor with a cylindrically shaped armature with an inside thread. The design embeds a rotary-to-linear converter within the confines of the rotating armature of a conventional servo motor by turning a conventional screw configuration "inside-out". To accomplish this, an output rod with external threads which match the internal threads of a rotating cylinder would extend or retract (if kept from turning) as the armature rotates. This design yields a very compact device and eliminates the requirements for connecting components between the servo motor and a separate rotary-to-linear converter device or screw actuator. This actuator produces an electric equivalent to hydraulic actuation; makes a linear actuator electronically controllable and allows the company's actuator to operate with any manufacturer's servo amplifier.
More Efficiency - Segmented Motor Laminations
In order to meet the demand for smaller size and lighter weight, Exlar developed a segmented lamination motor design. The resulting T-LAM motor provided a means to increase the reliability of the actuators by maximizing the motor's net heat dissipation capacity while at the same time reducing the actuator's overall size. The T-LAM design, because of its higher slot fill, minimal end turns and improved heat transmission characteristics increased the available continuous force capabilities of the actuator by 30-50%. Exlar's actuators can now provide up to 50% more thrust in the same size package and operate much cooler. In addition, the T-LAM design was very flexible in manufacturing which allowed Exlar to offer a myriad of custom motor windings with little impact on delivery and cost.