The role of miniature motors in robotic surgery
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The role of miniature motors in robotic surgery
Robotic-assisted surgery , once a marvel of sci-fi predictions , has come a long way since its introduction in the 1980 ’ s and now plays an instrumental role in operating theatres . The precise and refined movements made possible by robotic arms , combined with imaging technology , signify a marked improvement over conventional surgical methods . However , a predominant consideration in surgical robot manufacture is the need for motors that can deliver both dexterity and power , all while maintaining a compact size .
In recent years , surgical robotics has experienced a significant surge , reshaped surgical paradigms and offered a level of flexibility and precision that surpasses human capabilities . With the continuous diversification of surgical methods , from orthopaedics to less invasive common procedures , there is an increasing demand for varied motor solutions to suit the application .
Redefining surgical robotics : the motor challenges
Traditional motors typically used in surgical settings often come with design limitations , especially in their size , which can lead to design compromises in robotic arms . Furthermore , they operate with wound iron cores , introducing issues like cogging torque , or the unwanted pulsating force caused by the motor ’ s magnets ’ attraction to the iron-core windings , which can interfere with the smooth operation .
In a domain like surgical robotics , where every micromovement counts , even the slightest judder can be detrimental .
Motor selection plays a significant role in surgical robot applications .
Another inherent concern with traditional motors is significant heat generation during operation . Excessive heat is the result of resistive losses in the winding and core losses in the iron , posing potential risks to patient safety . Additionally , it can degrade the longevity and reliability of other integrated sensitive electronic components , all while decreasing the overall efficiency of the robotic system .
Slotless motors in the operating theatre
Brushless DC ( BLDC ) slotless motors are an innovative solution that offers immense power in a compact design , making them particularly suitable for surgical robotics . These motors distinguish themselves by forgoing the traditional restrictive , bulky construction of their traditional counterparts . By eliminating iron-core windings , they have a more streamlined design that
10 PECM Issue 65