Magnetically-powered micro robots are being used more and more in the biomedical field, as well as in microfluidics — the science that studies the behavior of fluids in micro-channels, and the technology of manufacturing micro-devices through which fluids flow or are confined. Many robots use electromagnets, which provide a significant degree of freedom control (DOF) or capabilities of movement. Another option, however, involves an array of rotating permanent magnets to sustain the same level of control over “untethered” (i.e., wireless) micro-robotic systems. 

Wireless Micro-robots Used Inside the Body

Wireless micro-robots (ranging in size from micrometers to centimeters) are an exciting prospect, especially in the medical field as they can be used inside the human body.  Examples of how a micro-robot could be used in the body are: 
  • Ophthalmic procedures
  • Catheter steering 
  • Capsule endoscopy 
  • Certain surgical techniques

Permanent Magnets vs. Electromagnets

For any application that involves wireless magnetic actuation, you need a high level of control, both of position and orientation. As an alternative to needing to use electromagnetic coils for field generation, one can also use permanent magnets. Historically, electromagnets have been preferred because you can control field strength via the coil current. That said, these systems are limited because the high current required results in high coil temperatures. This is obviously less than ideal for biomedical use.  In relation to electromagnets, permanent magnets can produce a field with no heat generation while still remaining strong with a high DOF. 

Metric Magnets From Apex

Browse our selection of metric magnets, which are highly useful for anyone in robotics. What an exciting field to be a part of! If you have questions about how you can use metric magnets, please, contact us today, or place an order at any time of the day by calling 1-304-257-1193.